Quick newbie question, do I need to tune my car if I put in bigger cc fuel injectors? I'm running stock turbo with stock fuel injectors and I'm putting in DENSO 680cc fuel injectors, so do I have to re-tune my car?

pslz send pm if possible, i dont check forum that often! thanks

 

Yes - you will need to change scaling / latencies until your fuel trims are in check then re-tune your afr because it will be off some.

(Simplest way to put it)

 

Your online so no PM for you.

You certainly have to adjust your latency values and injector size in the map. Without doing that it will run incredibly rich.

Tune is a loose term. I'd say, correct. Your not tuning the car or even the injectors. Your setting the proper values for the ECU to be able to drive them.

/brox

 

so how can i change the scaling/latencies until my fuel trim are in check? what do you mean by that? Sorry I'm a noob.

 

To do it correctly you would need a wideband, some logging software, ECUFlash, and a whole lot of time. If you really want to put those injectors in, you might as well have it done professionally. Injector scaling is a pain, especially if you don't have a dyno to do it on.

 

ok guys, i got an EVO 8 and what if I just replace my injectors with EVO9's, do I have to go through all those pain in the ***? or the only option I got is get the OEM injectors?...

 

you need to search

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