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Despre ECU si chip tuning


Un articol de pe


[Image: p73A0ECU-retry.jpg]
1. Should I get a "one size-fits all" or "off the shelf" Mugen, Jet, Spoon, Skunk2, Comptech, Neuspeed, FF Squad, Inline4, Power XS, Bayou Performance, or Dinan ECU which are "best guess" chips? How about getting one of those chips I see for sale on ebay all the time?
[Image: MCUREMOVE.jpg][Image: MCUREMOVE3.jpg]

1A. First, Don't Chip Too Early

There is no point in getting a new ECU program early in your engine build up and then later upgrading to bigger lift and duration cams, or larger injectors, bigger fuel pump, or an aftermarket IM/bigger bore TB , etc. , since these parts just render your "new" ECU program obsolete and useless (ie. any power gains from the chip are eliminated).

So please do not get your chip reprogrammed just after i/h/c/e , if you later plan on going for bigger & better things in the future. It's supposed to be one of your last modifications and not one of your first, to prevent the need for multiple chip reprogrammings after each addition of a new modification.

The reason you see so many chips for resale on ebay?:

Other enthusiasts made the mistake of buying a chip too early that was not programmed correctly for the unique way their engine package breathes. It made very little power for them , or likely made their engine run too rich, or both. They are now trying to recover the money lost from an obsolete or incompatible chip.

Then there are the programmers who take advantage of import enthusiasts who do not understand the performance difference between a pre-programmed, mail-order chip versus a chip tuned and programmed on your car at a dyno. They are selling them based on the attractiveness of convenience for unsuspecting people who don't have a local programmer and dyno, the hyped hp gains from the magazine articles or ads, and a lower cost compared to other significant hp gain modifications, like cams or an intake manifold (IM).

[Image: ECUanatomy.jpg]

1B. Second, What does an ECU do and what am I doing when I get a new chip ?

The ECU controls:

- the fuel map (ie. program commands for how much fuel to add at each rpm) and sequential firing of the injectors
- ignition map (program commands for how much spark timing to advance or retard from the baseline ignition timing you set at the distibutor cap at each rpm)
- VTEC switchover
- Redline
- Speed limiter (JDM and European models)
- Knock sensor warning
- Second O2 sensor CEL warning in OBD 2 and OBD 2b cars for testpipes and high flow cats and closed loop operations
- Activates the opening of the secondary runners' valves based on the IAB vacuum input, if you have a dual stage IM (eg. 3rd gen. GSR)

The ECU also activates your other CEL error codes and controls A/C & Idle/EVAP inputs/outputs.

When you get a new chip, the programmer has changed the program's commands of the ignition map and fuel map in response to a change in air flow and rpm (ie. both are indicators of "engine load"). The amount of ignition timing and fuel delivery is changed for a given air flow and rpm compared to the stock program. The programmer can also remove or inactivate the sensor CEL warning codes and move the VTEC point, redline, and speed limiter points to anywhere you like.

What do these ECU program's commands look like?

Example of a 3 dimensional ignition table of program commands (or "ignition map"):

Manifold Absolute Pressure or MAP which monitors air flow (Y axis), RPM (X-axis), and Ignition Advance/Retard from Baseline Timing (Z-axis).

[Image: ECU3bar3dignmap.gif]

There is also a 3-D fuel table (or "fuel map") which has Intake Manifold Pressure (Y-axis), RPM (X-axis), and Fuel Values instead of spark Advance (Z-axis).

The program commands can be entered on 2 dimenional tables.

Example of a 2-Dimensional fuel table's commands during a GSR's VTEC cam lobe operation . :

RPM down the Y axis to far left, MAP (mBar) across the top row, and fuel values for the injector duty cycle in the table cells.
[Image: ECUgsrstockfuel2d2hicam.gif]

Originally posted on the Hondata Website

Most (but not all) plug in chip replacements claim to be a 'Mugen' program. Typically these chips disable error reporting for most sensors and give about 40 % worse fuel economy. The chips are popular with engine swaps because they eliminate most error codes caused by poor wiring....The stock knock sensor is designed to compensate for different qualities of fuel, and has a limited scope of adjustment. It is not designed to compensate for detonation under boost and may be fooled by forged pistons rattling into retarding the ignition when knock is not present. Mugen recognizes this and does not have a knock sensor (input on their ECU).

1C. Third, "Best Guess" programs are not as good.

An "off the shelf" or mail order ECU is a programmer's best guess at trying to make a program that will fit as many different engine combination of mods as possible...that's why I call these "one-size-fits-all". These usually get you in the no gain or 5% disappointment gain ballpark. You will not get major gains with these "best guess" chips. Save your money.

So you want to make major power gains (ie. 13-15% or at least 7 whp from midrange up) with an ECU reprogram?
Please get a true custom chip instead, programmed on YOUR unique car with its own combination of mods, on a dyno using a wideband exhaust O2 sensor/Air:Fuel Ratio meter. This is the only way to go, if you are serious about getting the most out of a computer program upgrade for a street/race setup. If you got your chip by mail then, please understand that you did not get the most out of it...even the custom pre-programmed, mail-order kind of chips. The only correct way is to do the reprogramming on the dyno. And this leads us to who do you go to?

If you are lucky like me and have a couple of local programmers with Honda experience near your town, then your local programmer will go with you to the dyno and work his experience in tuning on the laptop and EPROM or EEPROM burner.

If you do not have a local programmer or race shop that does programming, then I strongly recommend getting together with some friends and investing in a Hondata Stage 4 or P200 system. It allows YOU to tune YOUR car on the dyno or at the track using elapsed times between known rpm points.

It comes with a chip burner, chips ($25/each), emulation laptop capability, instructions, and tech support. Investing in a wide band O2 sensor like the MOTEC they sell is also a good idea. This takes the guess and disappointment out of ECU upgrading.

If you want to go at this alone, then an AEM EMS is worth looking into, since it has base programs and laptop emulation. This is a serious investment for serious people.

If neither of these appeal to you and you insist on getting a mail order chip knowing that it won't be the best program, then stick to the known programmers (PM me if you want recommendations from people I've known who do a decent "best guess" chip). Most people who buy a mail order chip usually have a piggyback tuning box, like an Apex fuel controller (SAFC or VAFC) or Field SFC VTEC/fuel controller, and use those to further tune the fuel delivery on the dyno with a wideband O2 sensor.

Chip reprogramming at the dyno requires a wideband universal exhaust gas oxygen sensors (called an UEGO that you can get from dyno shop or race shop) to measure air:fuel ratio at each rpm. Expect at least 3-4 hr dyno time minimum to tune these even if you are experienced at partial and wide open throttle fuel tuning.

Other systems to consider are the Motec M4, Apex Power FC, Accel DFI, SDS EF3, and Electromotive Tec3. Compare processor speed (16 bit, 16 MHz versus 32 bit, 33MHz ), available baseline programs to get you going without starting from scratch, sensor compatibility, emulators availability, and a good track record for tech support/customer service (not just whether they have one or not).


2. Why will an "off the shelf" mail order ECU Disappoint?


From FAQ/Tech

...on most naturally aspirated engines operating on pump fuel, the only way to achieve tangible power gains is by increasing airflow through the engine. Chips cannot do this. Therefore they cannot make much difference in power output. Chip reprogrammers can richen the mixture slightly at full throttle and advance the ignition timing slightly perhaps but this would be at the expense of lowering the factory safety factors for detonation and emissions. The absolute maximum gain in this instance would be on the order of 5% and could be as little as 0%. Most independent tests that I have seen on performance chips for naturally aspirated engines have indeed shown minimal or no gains in acceleration.

Some were slower than the factory chip.

Chips for use in factory stock turbocharged applications can increase power substantially in some cases by raising the boost pressure. This again reduces the factory detonation limits and you risk engine damage. Without increasing fuel octane, you are asking for trouble especially if your engine does not have a knock sensor.

Finally, we have chip companies doing "custom" chips for modified engines. What does this involve? This is a technically sound modification only if your engine has the same mechanical mods as the motor on their dyno that the chip is being developed for. If your cams, heads, turbo, exhaust, intercooler, injectors, throttle body or fuel are different, the chip will not be correct for your engine. A chip made for an engine slightly different from yours will be slightly wrong under some conditions. In some cases, poor driveability and performance are the result.

SDS and Hondata agrees with me that the best way to rechip your computer is to program your ECU instead on the dyno on your car rather than buying a previously programmed "best guess" chip made to fit as many different engine packages as possible.

The only way to get good results on a modified engine with different mods from the base engine is to take your vehicle to the tuners facility and get a true custom chip burnt for YOUR engine. This must be done on a chassis dyno then tested on the road also for driveabilty faults which often don't show up on the dyno. This will cost more.

Here is some very good advice when buying a pre-programmed , "mail order" performance chip from SDS' website that I have found to be true:

Before buying, do acceleration testing with a stopwatch, Vericom (or a GTech Pro) or at the strip. Have an objective measure of performance as your baseline before programming so that you have something unbiased and not subjective (like a butt dyno impression) to compare to afterwards.

Get the chip maker to guarantee the performance gain IN WRITING and make him understand that you will return the chip to him if the chip does not work as claimed. If emission compliance is a concern, ask if their chip will pass the test and get it IN WRITING.

Follow all of the instructions provided by the chip maker when installing it.
Stick to reputable companies. Some people in the chip industry really don't know what they are doing. Talk to some people first who have used a certain chip and see if they are satisfied.

Test your car to be sure that you got what you paid for. This is all good advice when buying any aftermarket devices such as ignition wires, ignition products, oil or fuel additives etc. which advertise a performance gain.

If it doesn't do what it is advertised to do, you just got hosed and with some chips costing $300-500. This is something that you should not put up with.

Be careful. Some unscrupulous programmers will promise to sell you a "Mugen" like chip but in reality, all they have done is moved the redline higher and removed the CEL warnings. The advice to stick to known reputable programmers is wise, if you plan on mail orders.

What about standalone computers like a Hondata instead of a redone chip ?

If all of this doesn't sound too good to you (in terms of chips), the alternative is a (standalone) programmable engine management system . These allow you to tune your engine yourself. This can be good and bad. The same things apply as above for the mail order chips.

If you don't have a fairly thorough understanding of the system, engines and tuning plus a dose of patience, DON'T buy one of these.

Understand that you will have to program all of the values to make the engine start, warm up, cruise, accelerate and run at full power. This can entail entering hundreds of points in most cases and you will require either a dyno or a long deserted road plus some indication of mixture strength to properly tune such a system. These systems are great for the knowledgeable person and a nightmare for the lay person.

Remember, both the chip that you buy or the chip in your (standalone) programmable ECU must have the proper values entered for your engine to run properly.

The main advantage of user programmable (standalone) systems is that they can be quickly changed, if a new mod is done or if not quite right whereas the factory type (mail order) chip must be changed or sent back to be redone, sometimes, several times at great cost.

If you are contemplating a strictly race situation, don't bother with the factory ECU or chips at all. These were not designed for performance use and you will usually not get the kind of power required with factory hardware. This is when a programmable system is a must.

When considering buying a programmable system, here are a few tips:

Discuss your goals and needs with the tech people selling the system.

Make sure that the system will do what you require it to do. Don't expect the impossible - you can't expect a 400hp, 4 cylinder street car to have factory driveability, fuel economy, emission compliance, a smooth idle or long life on pump fuel. If you do, you are a nut and no one will talk to you. There is a reason why there are no factory cars like this driving around your neighborhood.

Removing the factory system and installing a stand alone system can be a lot of work. What hardware, skill and tools will you require to install the system? Can you handle it or do you know someone who can?

What factory options will you lose when removing the factory ECU?

If emission legality is a concern, find out if their system is legal and if it will likely pass in your area when properly programmed. Many systems are not legal for street use and many manufacturers will not guarantee emission compliance because they cannot control the programming.

Find out how easy the unit is to program and if you can handle it. If it is difficult to use, either don't buy it or find a place where you can go to have it properly tuned.

Make sure that the company has good, accessible tech support, you may need it.

You are responsible, if you program the system too lean and melt your engine, don't blame the system maker. If the engine runs like crap, you are probably asking the system to do something that it was not designed for or have not programmed it correctly. This is your problem now.

Read, understand and follow the manufacturers instructions. LISTEN. It will save you a lot of time. Remember, that the people who design and build this stuff likely know a hell of a lot more than you do about it.

If all of this discourages you, sell the present car and simply buy a
faster one, you will probably be happier in the end.


3. Some Basic ECU Info for OEM Honda ECUs

Originally posted by

Most ECUs up to 1996 hold their program information and data in small chips called ROMs. These are 28pin chips 1.5 inches by 0.6 inches. If we want to change either the program information (how the ECU behaves) or the data (usually the fuel and ignition tables), we need to replace the factory ROMs with our own. There are several different types of chip which can be used to replace the factory ROM.

3A. Terms To Know


ROMs are read only memory, which cannot be re-used once programmed(e.g. Atmel AT27C256 ROMs). ROMs are most suitable for the final tune for an engine, which is not going to be altered.


EPROMs are like ROMs except they have a quartz window which allows the EPROM to be erased and reused. Like ROMs, EPROMs are suitable for the final tune.


EEPROMs can be electrically erased and re-programmed, usually much quicker than EPROMs (e.g. Atmel AT29C256). The advantage of EEPROM is that it is can be programmed in 20 seconds without erasing it first. EEPROMs are most suitable for use when tuning a car, but can be used as the final tune as well.

EPROM emulation

An EPROM emulator is a device which emulates (acts like) an EPROM. It is a box of electronics which plugs into the ROM socket on the ECU, and a laptop or PC. The advantage of using an EPROM emulator is that the tuning information in the ECU can be changed quickly without unplugging or swapping ROMs.

There are two types of EPROM emulators: normal and real-time.

Normal EPROM emulators will shut the ECU down while the information in the ROM is updated.

Real-time EPROM emulators allow you to changetuning information while the engine is running.

All Honda ECUs have a part number which is located on the side of the
ECU and inside the ECU on the connector. e.g. 37820-P72-A01

The part number consists of three components:

Honda's part number for ECU, which is always 37820

Three characters (which are loosely related to the model of car/engine). e.g P72

Three characters (which are the revision of the ECU) e.g. A01

The middle three characters are the most useful to identify what the ECU is. Different generation ECUs may use the same characters. e.g. a P72 OBD I ECU is different from a P72 OBD II ECU. Here is a list of common ECUs (and the car model they come from):

PG6 : 88-89 Integra (all makes)

PM5 : 88-91 Civic/CRX DX

PM6 : 88-91 Civic/CRX SOHC Si

PM7 : 89-91 DOHC ZC (JDM 'EF' ECU)

PM8 : 88-91 CRX celalalt forum

PR2 : 89-91 ZC (Euro)

PR3 : 89-91 JDM B16A EF8/9

PR3 -J00 or J51 : 92 JDM Integra B16A EF8/9

PW0 : 89-91 JDM B16A EF8/9 DA6-XSi

PR4 : 90-91 Integra LS/GS

PS9 : 88-91 4 door Civic EX Auto

P05 : 92-95 OBD-1 Civic CX

P06 : 92-95 OBD-1 Civic DX

P07 : 92-95 OBD-1 Civic VX

P08 : 92-95 OBD-1 Civic D15 JDM

P0A : 94-95 OBD-1 Accord EX

P13 : 93-95 OBD-1 Prelude Vtec

P14 : 93-95 OBD-1 Prelude Si (non Vtec)

P27 : 92-95 OBD-1 EG JDM Civic 1600 sohc

P28 : 92-95 OBD-1 Civic Si/Ex

P30 : 92-95 OBD-1 DelSol DOHC Vtec Si/EG SiR

P54-G31 : 1997 Honda Accord 1.8 LS

P61 : 92-93 OBD-1 Integra GSR

P72 : 94-95 OBD-1 Integra GSR

P72 : 96-00 OBD-2 Integra GSR

P73 : 96-00 OBD-2 Integra Type-R (JDM & USDM)

P74/75: 92-95 OBD-1 Integra LS/GS

P75 : 96-00 OBD-2 Integra LS/GS

P2N : 96+ OBD-2 Civic HX Coupe

P2P : 96+ OBD-2 Civic EX Coupe

P2E : 96+ OBD-2 Civic DX Coupe

P2M : 96+ OBD-2 NZ Civic SOHC VTEC

P2T : 99+ OBD-? Civic Si Coupe

P5P : 97-00 OBD-2 Prelude Type-S (JDM ECU)

PBA : 97+ US Acura 1.6EL


PCX : 99+ OBD-? S2000

ECU ROM Numbers

As further identification Honda ECUs have a software revision number inside the ECU. This is usually a two or three digit number stamped on the 28 pin ROM, or main processor. Accord and Prelude ECUs can use a letter and number code.

3B. Injector Size Limit For Stock ECU

What are the biggest injectors I can run with a stock ECU?

The ECU can be re-calibrated to suit any sized injector (make sure you match injector impedance if you are replacing you injectors). However, injectors take a finite amount of time to open and close, so the bigger injectors tend to be less accurate with their fueling at low durations, such as idle.

Much depends on the mechanics of the injector, and how quickly it can open and close. With disk type injectors (such as RC 440cc injectors) you cannot tell the difference between stock injectors and injectors which flow twice as much as stock injectors, once the ECU has been reprogrammed for the larger injectors (and there is no difference on the dyno either). With race engines we have run injectors up to 4 times the size of the stock injectors.

How come people say that the biggest injector I can run is 310
cc/min. ?

This assumes that you are not re-calibrating the ECU to the new injector size. If you don't, the bigger injector will over-fuel. If this happens then the ECU will compensate to some degree using closed loopo peration to reduce the injector duration. The limit of the long term closed loop adjustment is about 40%, which is close to the increase in size from stock to 310cc injectors.

3C. Disadvantages of Running High Fuel Pressure

Some people, instead of buying a proper size injector to get more peak hp opt to push the limits of the current injector they have by cranking up the FP and running at near or over 80% duty cycle. Once you exceed a 20% increase from the maximum FP spec, you wear out the injectors faster and the ECU fuel map calibrations for the program are no longer applicable.

Other disadvantages of extra high FP.:

- Fuel injectors require more current to open meaning they run hotter and are less reliable as a result.

- Fuel injectors can take longer to open.

- There is a greater tendency for the fuel to leak past the injector seals.

- There is a greater chance of rupturing the diaphram of the FPR (usually rated to 100 psi) dumping fuel into the intake.

So, you probably need to upgrade the injector and possibly the fuel pump (if you push FP or run high CR or boost) and if you exceed 310 cc/min then you will need an ECU re-program.

Honda nu arde uleiul, il foloseste.

The following 1 user says Thank You to yulasinio for this post:
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link cu un PDF despre procesele si outout-urile unui ecu

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ba fratilor, de mult ma bate gandul sa ma apuc de studiat problema, am un amic f bun la partea de calculatoare-soft, cu hardwere ce permite citire, resciere de cipuri etc. cred ca o sa folosesc drept cobai crx-ul Icon_biggrin
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Tie iti trebuie un chip pe un P28 si apoi te poti tot juca cu softul.

Bun articol Razvane

Hai hui
Honda nu arde uleiul, il foloseste.

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azi i-am aratat prietenului meu niste imagini pe net cu un ecu deschis si a vazut ce e acolo, ce presupune si a zis ca e lejera treaba. este scula de rescriere eprom, tot ce tre. acum ma uit sa vad ce altceva imi mai trebuie.
el are un cablu obd-usb, insa e 2, deci imi trebuie si un convertor obd1-obd2
l.e: am verificat, am ecu P30
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are soclu pt integratul ala?

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nu stiu ca nu l-am desfacut, dar nu e o problema, imi pune amicul meu.
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pai nu cred ca are de serie. e electronist bun omu'?

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da man e the best i know Icon_wink. mi-a reparat aparatul de frezare cad-cam de 85.000 euro Icon_biggrin
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Sa mai adaugam niste cifre pe aici poate ajuta candva pe cineva:

88-91 ECUs (PM6, PR4, PW0, PR3, PM7):
5spd = 000, 001, 002, A00, A01, A10, J00, J001, C01, C00
Auto = J51, J50, A50, A51, 901, A60, C50, C51, X30, A80

92-5 ECUs (P28, P30, P61, P72, P91, P08)
5spd = 000, 001, 002, 003, A00, A01, A02, C00, C01, C02, J00, J01, J02
Auto = J50, J51, 901, 902, C50, C51, C52, A50, A51, A52

96-00 ECUs (P2E, P2P, P2J, P72)
5spd = 000, 001, 002, 003, A00, A01, A03, C00, C01, C02, C03, J00, J01, J02, A11, C11
Auto = A70, A71, A72, A91, A92, C70, C71, C72, C91, C92

From the patterns we can learn the following:
-First letter = country of orgin
J = Japan
C= Canada

-Second digit, if 5, 7, 9 then ecu is auto usually

-Third digit denotes the version/variation

P07 : 92-95 OBD1 Civic VX (D15Z1) 6 Wire O2
P05 : 92-95 OBD1 Civic CX (D15B)
P06 : 92-95 OBD1 Civic DX (D15B)
P28 : 92-95 OBD1 Civic Si/Ex (sohc vtec d16z6)
P30 : 92-95 OBD-1 Del Sol? DOHC Vtec Si/EG Si R
P61 : 92-93 OBD-1 USDM GSR B17A DOHC vtec
PR3 : 92-93 OBD-1 JDM Integra RSi/XSi (B16A)
PR4 : 92-93 OBD1 Integra RS/LS/GS (DOHC)
P72 : 94-95 OBD-1 Integra GSR (1.8L B18C? DOHC Vtec)
P74 : 92-95 OBD-1 Integra LS/GS (1.8L B18B)
P75 : 92-95 OBD-1 Integra LS/GS (1.8L B18B)
P08 : 92-95 OBD1 Civic/CRX VTi/VXi (sohc vtec)
P27 : 92-95 OBD1 Euro/Asian Civic (non-vtec 1.6l)
P29 : 92-95 OBD-1 JDM Domani (sohc zc)
P54 : 92-95 OBD-1 JDM Domani/1.8l Accord (1.8L B18B DOHC)
P70 : 92-95 OBD-1 Domani (sohc vtec zc - no oil pressure sensor reading)
P71 : 92-95 OBD-1 Integra (sohc vtec d16a)
P76: 94-95 OBD-1 JDM Integra (sohc zc)
P84 : 92-95 OBD-1 JDM Civic ETi (VTEC-E auto)
P91 : 92-95 OBD-1 JDM Civic Coupe (sohc vtec 1.6)
P0 A : 94-95 OBD-1 Accord EX
P0 C : 92-95 OBD-1 Accord 2.2L (F22B DOHC non-vtec)
P39 : 92-95 OBD-1 JDM Accord SOHC VTEC (F22A)
P11 : 92-95 OBD-1 Prelude 2.0i BB3 with F20A4 non-vtec
P13 : 93-95 OBD-1 Prelude Vtec (H22A DOHC Vtec)
P14 : 93-95 OBD-1 Prelude Si (non Vtec - H23A)
PT6? : some sort of non-VTEC OBDI Accord or Prelude, F22 perhaps

P72 : 96-00 OBD-2 Integra GSR
P73 : 96-00 OBD-2 Integra Type-R (JDM & USDM)
P75 : 96-00 OBD-2 Integra LS/GS
P2 E : 96+ Civic LX
P2 N : 96+ OBD-2 Civic HX Coupe
P2 P : 96+ OBD-2 Civic EX Coupe
P2 T : 99+ OBD-2 Civic Si Coupe
P5 P : 97-00 OBD-2 Prelude Type-S (JDM)
P28-G03 : ODB II 96+ European del Sol (SOHC VTec) (Looks like P73)

Engine info

Code Displacement Power Torque Compression Bore Stroke Cam Design VTEC OBD Production

A20A3 1955 122 9.3:1 0 0 sohc no 0 1988-1989 Accord
B16A 1595 168@7800 116@7300 10.4:1 81 77.4 dohc yes 2 1996-2000 Civic VTi
B16A 1595 158@7600 112@7000 10.2:1 81 77.4 dohc yes 0 1990-1993 Integra XSi/RSi (JDM)
B16A SiR 1595 158@7600 111@7000 10.4:1 81 77.4 dohc yes 0 1991 CRX SiR (JDM- rare 10.4:1
B16A SiR 1595 160@7600 111@7000 10.4:1 81 77.4 dohc yes 0 1990-1991 Civic SiR (JDM)
B16A SiR II 1595 170@7600 116@7000 10.4:1 81 77.4 dohc yes 1 1992-1995 Civic SiR II (JDM) /del S
B16A2 1595 160@7600 111@7000 10.2:1 81 77.4 dohc yes 2 1999-2000 Civic Si
B16A3 1595 160@7600 111@7000 10.4:1 81 77.4 dohc yes 1 1994-1995 Del Sol
B16B 1595 185@8200 118@7500 10.8:1 81 77.4 dohc yes 2 1997-2001 Civic Type R (JDM)
B17A1 1678 160@7600 117@7000 9.7:1 81 81.4 dohc yes 1 1992-1993 Integra GSR
B18A1 1834 130@6000 121@5000 9.2:1 81 89 dohc no 0 or 1 1990-1991 Integra GS/RS/LS
B18A1 1834 140@6300 121@5200 9.2:1 81 89 dohc no 1 1992-1993 Integra GS/RS/LS
B18B1 1834 142@6300 127@5200 9.2:1 81 89 dohc no 1 1994-1995 Integra GS/LS/RS/SE
B18B1 1834 142@6300 127@5200 9.2:1 81 89 dohc no 2 1996-2000 Integra GS/LS/RS/SE
B18C SiR-G 1797 178@7600 129@6200 10.6:1 81 87.2 dohc yes 1 or 2 1995-1997 Integra SiR-G (JDM)
B18C Spec R 1797 195@7800 130@7600 10.6:1 81 87.2 dohc yes 2 1997-2001 Integra Type R
B18C1 1797 170@7600 128@6200 10.0:1 81 87.2 dohc yes 1 or 2 1994-2001 Integra GSR
B18C3 1797 200 ps@8000 rpm 15.5 kg-m@7500 rpm 10.8:1 81 87.2 dohc yes 1 or 2 1996 Integra Type R (JDM)
B18C5 1797 195@8000 130@7500 10.2:1 81 87.2 dohc yes 2 1998-2001 Integra Type R
B20A3 1958 104@5800 111@4000 9.1:1 81 95 dohc no 0 1990-1991 Prelude 2.0 S
B20A5 1958 135@5800 111@4000 9.0:1 81 95 dohc no 0 1990-1991 Prelude 2.0 Si
B20B 1973 126@5400 133@4300 8.8:1 84 89 dohc no 2 1997-1998 CRV
B20Z 1973 146@6400 133@4500 9.6:1 84 89 dohc no 2 1998-2001 CRV
B21A1 2056 140@5800 135@5000 9.4:1 83 95 dohc no 0 1990-1991 Prelude Si
C30A 2977 265@6800 217@5400 10.2:1 90 78 dohc yes 2 2002+ NSX
C32B 3179 280@7300 224@5400 10.2:1 93 78 dohc yes 2 2002+ NSX
D15A2 1488 58 0 0 sohc no 0 1984-1987 CRX celalalt forum (Carbed)
D15B 1493 130@6800 14.1kg/m@5200 9.6:1 75 84.5 sohc yes 1991-1999 Civic VTi (EG4)
D15B2 1493 92@6000 89@4500 9.2:1 75 84.5 sohc no 0 1988-1991 Civic DX/LX, CRX DX
D15B6 1493 62@4500 83@3000 9.1:1 75 84.5 sohc no 0 1988-1989 Civic celalalt forum / CRX celalalt forum
D15B7 1493 102@5900 98@5000 9.2:1 75 84.5 sohc no 1 1992-1995 Civic DX/LX
D15B8 1493 70@4500 83@3000 9.1:1 75 84.5 sohc no 1 1992-1995 Civic CX
D15Z1 1493 92@5500 97@4500 9.3:1 75 84.5 sohc yes 1 1992-1995 Civic VX
D16A1 1590 113 @ 6250 99 @ 5500 9.3:1 75 90 dohc no 0 1986-1987 Integra
D16A3 1590 118 @ 6500 103 @ 5500 9.5:1 75 90 dohc no 0 1988-1989 Integra
D16A6 1590 108@6000 100@5000 9.1:1 75 90 sohc no 0 1988-1991 Civic Si/ CRX Si
D16A8/9 1595 137@6800 108@5700 9.5:1 75 90 dohc no 0 1988-1989 Integra
D16Y5 1590 115@6200 104@5400 9.4:1 75 90 sohc yes 2 1996-2000 Civic HX
D16Y7 1593 106@6200 103@4600 9.4:1 75 90 sohc no 2 1996-2000 Civic DX/LX/CX
D16Y8 1590 127@6600 107@5500 9.6:1 0 0 sohc yes 2 1996-2000 Civic EX
D16Z6 1590 125@6600 106@5200 9.2:1 75 90 sohc yes 1 1992-1995 Civic EX/Si/Del Sol Si
D17A1 1668 115@6100 110@4500 9.5:1 75 94.4 sohc no 2 2001+ Civic DX/LX
D17A2 1668 127@6300 114@4400 9.9:1 75 94.4 sohc yes 2 2001+ Civic EX
EW4 1488 91@5500 93@4500 8.7:1 0 0 sohc no 0 1985-1987 CRX Si
F20A 1997 150@6100 137@5000 9.5:1 0 0 dohc no 0 1990-1993 Accord 2.0Si (JDM)
F20C 1997 240@8300 153@7500 11.1:1 87 84 dohc yes 2 2000+ S2000
F22A1 2156 125@5200 137@4000 8.8:1 85 95 sohc no 0 1990-1993 Accord
F22A1 2156 135@5200 142@4500 8.8:1 85 95 dohc no 1 or 2 1992-1996 Prelude S
F22A4 2156 130@5200 142@4000 8.8:1 85 95 sohc no 0 1990-1991 Accord
F22A6 2156 140@5600 142@5400 8.8:1 85 95 sohc no 0 1991-1993 Accord
F22B 2156 160@6000 148@5000 9.2:1 85 95 dohc no 1 or 2 1992-1996 Prelude Si
F22B1 2156 145@5500 147@4500 8.8:1 85 95 sohc yes 1 or 2 1994-1997 Accord EX
F22B2 2156 130@5300 139@4200 8.8:1 85 95 sohc no 1 or 2 1994-1997 Accord DX/LX
H22A 2157 220@7200 163@6500 11:1 87 90.7 dohc yes 2 1997-2001 Prelude SiR (JDM)
H22A 2157 200@7000 156@5250 10.0:1 0 0 dohc yes 2 1999-2001 Prelude
H22A 2157 190@6800 152@5500 10.6:1 0 0 dohc yes 1 or 2 1994-1997 Accord SiR
H22A 2157 220@7200 163@6500 11:1 87 90.7 dohc yes 2 1997-2001 Prelude Type S (JDM)
H22A 2157 200@6800 161@5500 10.6:1 0 0 dohc yes 1 or 2 1992-1996 Prelude VTEC
H22A1 2157 195@7000 156@5250 10.0:1 87 90.7 dohc yes 2 1997-1998 Prelude
H22A1 2156 190@6800 158@5500 10:1 87 90.7 dohc yes 1 or 2 1994-1996 Prelude VTEC
H23 2259 160@5800 156@4500 9.8:1 87 95 dohc no 1 1993-1995 Prelude Type S (JDM)
H23A1 2258 160@5800 156@4500 9.8:1 87 95 dohc no 1 or 2 1992-1996 Prelude SE/Si
K20A 1998 220@8000 206@7000 11.5:1 86 86 dohc yes 2 2001+ Integra (JDM)
K20A 1998 220@8000 206@7000 11.5:1 86 86 dohc yes 2 2001+ Civic Type R (JDM)
K20A 1998 220@8000 206@7000 11.5:1 86 86 dohc yes 2 2001+ Type R (JDM)
K20A 1998 160@6500 140@4000 9.8:1 86 86 dohc yes 2 2001+ Integra IS (JDM)
K20A2 1998 200@7000 142@6000 11:1 86 86 dohc yes 2 2001+ RSX Type S
K20A3 1998 160@6500 132@5000 9.5:1 86 86 dohc yes 2 2001+ RSX (base)
K24 2354 160@6000 162@3600 9.6:1 87 99 dohc yes 2 2002+ CRV
ZC 1590 137@6800 108@5700 9.5:1 75 90 dohc no 0 1990-1993 CRX (JDM)
ZC 1595 129@6800 106@5700 9.6:1 75 90 dohc no 0 or 1 1989-1992 CRX Si16/1.6i (JDM)
ZC 0 129@6800 106@5700 9.6:1 1595 0 dohc no 0 1985-1987 CRX Si (JDM)
ZC 1590 119@6300 105@5500 9:1 75 90 dohc no 0 or 1 1990-1993 Integra (JDM)
ZC 1590 129@6800 106@5700 9.6:1 75 90 dohc no 0 1986-1989 Integra (JDM)
ZC 1590 129@6800 106@5700 9.6:1 0 0 dohc no 0 1986-1987 Civic Si (JDM)
ZC 1590 129@6800 106@5700 9.6:1 75 90 dohc no 0 1988-1991 Civic Si (JDM)

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Ce semifica ultimele 3 caractere de pe ECU:

North American model


The letter can be A, C or L

The first number will be either 0 or 5. 0=manual; 5=automatic

The last number is the firmware revision. 0, 1 or 2

Other than North America model


The letter can be J, G or E

The first number will be either 0 or 5. 0=manual; 5=automatic

The last number is the firmware revision. 0, 1, 2, 3 or 4



The first number will be either 0 or 9. 0=manual; 9=automatic

The second number will usually be a 0

The third number is the firmware revision. 0 or 1 will be here.


USDM P30 manual transmission - 37820-P30-A02
USDM P30 auto transmission - 37820-P30-A51

EURO P30 (shortbox) manual transmission - 37820-P30-G00
JDM P30 (shortbox) auto transmission - 37820-P30-901

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