Fpr Integra
How to make larger injectors work on a stock ecu? will chose best answer?
I cant chip/tune my automatic integra, so I have to use a stock ecu. I know turbochargers need more fuel but how can larger injectors work without a chipped ecu?
Can I just buy a FMU or a FPR and manually raise the fuel pressure? Will the larger injectors work then? Or can I just raise the fuel pressure on my stock injectors?
Im only planning to run 4psi on my stock b18b1.
Will chose best answer for any help thanks
The only way to modify for bigger injectors is to tune the ECU. The best way to do it is to spend the money to get a Hondata S300 ECU, which will work to control larger injectors and your automatic transmission. This way, you can run as much as 7-8psi as well. The other option would be with stock injectors and using an 8:1 or 12:1 rising rate FMU, which essentially just raises fuel pressure at either an 8:1 or 12:1 ratio of boost pressure. at 4psi, even the 12:1 wouldn't do you much good, as the final fuel pressure would only be 48psi (12x4). At 8psi, however, you can see the effect, as the fuel pressure would be around 96psi, which would increase the volume of fuel injected through the stock injectors. The only problem with this, is it puts a tremendous strain on the injectors and the fuel pump, and it's imprecise at best. As I said, I'd recommend getting the Hondata S300 which is an aftermarket ECU board with full tuneability and functionality that fits inside the stock ECU case, and is the only aftermarket solution compatible with the automatic. Now if you really wanted to jury rig it, you could use an air-fuel controller, like the A'pexi S-AFC, which is popular with DSM owners, but it is pretty imprecise because of the way it works, intercepting signals to the stock ECU and modifying them to get the results it wants. In some situations it works well, but it's just easier (not to mention nobody will see the giant fluorescent blue display to give away the turbo if you want to go stealth and black out the intercooler as well) to get the S300.
96 Integra SE (I/E/H/IM)
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