You also needed to make these repairs, often--progress is generally a good thing. It is only meant to introduce basic GM EFI tuning … This can be good and bad. There are a couple ways to have this service performed. 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. Today, these roadblocks no longer exist. Be wary of these folks. You should remember a few points when doing the ECU setting. If you notice that there is a theme here, it's because there is. Tuning basics for E85 Fuel equipped vehicles. You ended up with a perfect spark timing only in a limited RPM band. Notice there are lots of 32 bit floats in the area of memory. With race engines we have run injectors up to 4 times the size of the stock injectors. If your cams, heads, turbo, exhaust, intercooler, injectors, throttle body or fuel are different, the chip will not be correct for your engine. Repairs could be made with chewing gum foil and gum.
However, the adjustments need to be thoroughly tested and developed by experts in order to provide safety for the car parts as well as the passengers. MBT, or minimum for best torque). The computer uses the mapped data to work out the optimum control conditions in which the engine should function. It will save you a lot of time. The ECU also activates your other CEL error codes and controls A/C & Idle/EVAP inputs/outputs. Unfortunately, while many of these types can access some or all of the correct data, most have zero training or knowledge of the dynamics of engine tuning. Test your car to be sure that you got what you paid for. Posted by Alex (Im) E. on 21 February 2013 01:09 AM, How To Program Car's ECU (Guide to Car Tuning / Chip Programming), Large Community Forum Dedicated for DIY Mechanics & Tuners. 3 Typical Questions When Attempting Car Tuning: 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. 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). So rather than put each car through a unique assessment and get a bespoke timing map, they adopt a standard one map fits all philosophy. There is something wonderful about turning a couple screws and getting a noticeable change in how your bike runs, altering the idle point, getting the fuel spot on and having a blast right after it's adjusted. Different generation ECUs may use the same characters. What about standalone computers like a Hondata instead of a redone chip? Things have moved on and it is now possible to have a few maps stored which you can select from. The piggyback ride, reflashing, and other aftermarket solutions to ECU tuning.
The advice to stick to known reputable programmers is wise, if you plan on mail orders. What is a Map? Note: the following is not meant to be a step-by-step tuning guide.
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. What does this involve? Notes: Overall performance puts "safety first" whilst improving the three basics of vehicle performance, "accelerate, turn, decelerate" with the right balance between the three elements. As for the EGT levels, both ignition timing and A/F ratios will affect the combustion temperatures and EGTs.
The program commands can be entered on 2 dimenional tables. This is a purely hypothetical MAP for illustration only. Rich and retarded. Chips for use in factory stock turbocharged applications can increase power substantially in some cases by raising the boost pressure. Thus the ECU in order to make accurate diagnosis on engine control utilizes stored data. EFI electronic Basics EFI 101, a good place to start. They are now trying to recover the money lost from an obsolete or incompatible chip. That's why if you're serious about car ECU chip tuning — you want to look into dedicated ECU chip tuning software like TOAD. Slightly richening the A/F ratio a half-point richer than the Leanest for Best Torque (LBT) is a good practice to provide a safety margin. 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. Software that not only provides HEX editing capabilities, but can also visually map out cars ECU map into sections... without you having to look for them manually. We decided to use a trusted brand and company called ECUnleashed. Hence, no street-tuned engine is ever truly optimized. Running leaner than factory can sometimes improve throttle and power, but too lean can fry an engine and burn a hole in a piston or two. 250, 500, 0,0, 9, 800, 1200, 1600, 2000, 2400, 2800, 3200, 3600, 4000, 4400, 4800, 5200, 5600, 6000 and 6400. The list goes on. Many systems are not legal for street use and many manufacturers will not guarantee emission compliance because they cannot control the programming. Make sure that the system will do what you require it to do.
It controls how the car runs. The numbers in red represent RPM values, the green numbers represent Mass Air Flow and the numbers in the yellow matrix represent fuel injector pulse width. During development, we compare data logs and dyno run of original engine to the modified engine and check if our commands are made correct, if not we modify until the lambda is perfect. If you do, you are a nut and no one will talk to you.
Engine Start and Warm up Enrichment Tuning. Fuel injectors require more current to open meaning they run hotter and are less reliable as a result. They are generally faster and able to cope with a wide variety of additional factors such as water/methanol injection and a turbo timer. We have discussed modifications and a general review here and here previously, but like everything here at RideApart, we wanted to make it even better. Piggyback ECU (pro's and con's) Fail Safe Air/fuel Gauge (AN ENGINE LIFE SAVER) This again reduces the factory detonation limits and you risk engine damage. A number of aftermarket solutions also allow the OEM ECU to be recalibrated. 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 HF 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-? The ECU shuffles through the tons of data that come to it in the form of readings to decide the course of action that should be taken by the engine to ensure an ideal drive. The values 200 and 500 are not RPM based on the magnitudes (RPM would not normally be lower than 650), the values 800 thru 6400 are most likely RPM values used in a lookup table or map. There are two types of EPROM emulators: normal and real-time. a P72 OBD I ECU is different from a P72 OBD II ECU. However, finding someone that actually knows how to tune isn’t so easy. Resetting the ECU when you choose to boost Octane becomes necessary because your ECU has a memory bank for octane. Even though you have made modifications in your car, the ECU still continues to get an input of the old data which is stored in it’s memory. In tuning an engine, it’s critical to know the power/torque output, the air-fuel ratio, the exhaust gas temperatures and the knock count. ECU – Electronic Control Unit.
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