I finally got my dtec working and am having trouble pulling enough fuel. It has 750cc injectors and a 50 trim turbo running 22psi on pump gas and around 28psi on race gas. At 43psi base fuel pressure with a 1:1 ratio it seems like it is getting way too much fuel on pump gas and I won't be able to pull enough fuel without pulling over 20% on dtec. I haven't tested race gas yet, but I am wondering if a static fuel pressure would be better than my current rising rate, or if i should simply lower the fuel pressure base and continue using rising rate. The injectors are RC injectors and from what I've herd if they are lower than a certain fuel pressure they won't spray at idle. Does this sound right that I am currently dead rich with these injectors pulling 15% fuel on dtec. Thanks guys.
where could I start at for tuning these injectors, my fear is that it won't provide enough fuel up top, but if it will then I'm not too worried. It is dead rich reading 10:1 with 18% correction on the dtec
Static 43. For a baseline I start by pulling somethings small like 10% up till 4500 where I only pull 4% (stock pcm) If i had a 3bar map I'd pull 0% up there because it always leans out up top with no bottle neck fix in the canister. But you have to pull at least 4% on the stock map to avoid an overboost code. Then I do a few wot pulls from 3-4k To get the idea of where things stand and how much more fuel I need to pull its usually around 20%ish then Ill usually bump the rest of the rpms up a little closer like 13-15% (still pulling very little up top tho) to get the entire band in the mid 10's and start fine tunning from there. This is based off my trial and error on my own 50 trim setup Im by no means an expert hope that helps.
where could I start at for tuning these injectors, my fear is that it won't provide enough fuel up top, but if it will then I'm not too worried. It is dead rich reading 10:1 with 18% correction on the dtec
And it will lean out up top without a bottleneck fix just dont pull very much up there.
my real issue is if that will be enough fuel to support mid 400's even on race gas. I'm looking for around 400 pump and a good deal higher on race
It will be enough to get you over 500 no problem and 400 wont be an issue at all. You may want to look into the bottle neck fix and the fuel pump rewire because without that no matter what size injectors you have you will be limited by the size of the feed line at the stock fpr. The stock wiring only supports 10 vols and 8 volts at redline those 2 will be more handicapping to what you are trying to achieve then the injectors.
he said he has a 50 trim.......... may not be enuff fuel
Damn sorry im tired lol. The 50 trim maxes out at 550 or so right? If it isnt enough he could just bump the fuel pressure up in the event of that happening.
Gotcha how much fuel should I expect to be pulling at 43 psi static to be able to maintain a decent idle. I am looking for mid to high 400's on race and decent driveability I know this could be difficult with static because fp is so high at idle.
does anyone know how much power I can support with static and if my idle will be decent with that much fuel pressure and pulling that much fuel with dtec. I'm also looking for an idea of how much I would be pulling at idle. If anyone knows what is the maximum recommend to be pulled at WOT before timing gets funny from pulling so much out.
does anyone know how much power I can support with static and if my idle will be decent with that much fuel pressure and pulling that much fuel with dtec. I'm also looking for an idea of how much I would be pulling at idle. If anyone knows what is the maximum recommend to be pulled at WOT before timing gets funny from pulling so much out.
Your idle will be fine at 43. Timing is gonna be too much now matter what u do you may want to look into meth injection to keep the knock down or a flash. Also the amount of fuel u will pull we be Dependant upon ur car I have 650's so im not sure exactly on the % but I know I was pulling out like 33% at idle on stock fuel pressure with my old 750's im sure itl be less then that . And your gonna have to make a choice between target afr and timing without meth injection. I cant get my car ant leaner then 11.1 without timing advance hurting me too much but im on cali 91 octane gas.
Gotcha how much fuel should I expect to be pulling at 43 psi static to be able to maintain a decent idle. I am looking for mid to high 400's on race and decent driveability I know this could be difficult with static because fp is so high at idle.
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Tuning dtec...static fuel pressure or no?
Some things are pathetic! 
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