Thank you
I’m okay you
you've likely maxed out your injectors. If you're not leaning out, you're good. log it and email your tuner.
How would I know if my engine is leaning out?
Send a log to your tuner, they'll know.
really? Please, do elaborate. I love learning new things.
IDC is calculated on intake valve opening events. I've personally had IDC up to 137% without leaning out... That is about the time I recommend looking at larger injectors, but if you assumed 137% is static, then an indicated 100% is more like 73% INJECTOR duty cycle.
Not without a WBO2.
I don’t assume to know if he has a wide band or not. Not sure he knows what he has. My understanding, is anything over 100% and the injector stays open through the duration of all four strokes. If he already has a pump, fuel is bottlenecking at the injector and he would need to get something bigger if he doesn’t want IDC’s that high. But if he’s not leaning out, it’s not an issue. Even though the stock o2 sensors aren’t wideband, would the afr reading though the AP not be somewhat accurate in determining wether he is running out of fuel or not?
Makes sense why the AP afr pins itself at 11.14. I’ve always just gone by the aem wide band, but it makes sense now. Are the stock o2 sensors not designed to read over or under a certain value? Like only narrow band? Last question
To my understanding i believe fuel pump will only give you a little wiggle room with the mods you have, what you really need is larger injectors so their not maxed out like they are in your case. All i have is an intake and etune by bren tuning and my IDC is at 93% at WOT with that alone. Before even thinking of going past that its good idea to go 1050cc injectors, 340lph pump, and FPR.
Please note the rest of the thread. If you have a stock turbo on gas, do not waste money on upgrading your injectors.
I did not know that, I have been reading in multiple places people saying being nearly maxed out with turboback and a tune. So I guess 2018 sti (cobb Stg2 91 OTS map) going catless downpipe and turboback is not going to be pushing the injectors either? I am staying with the stock air box. If I go the catless dp route I will be watching out for boost creep though.
Yamaha sho is a tuner. He knows that the typical turbo back/intake won’t max the injectors because he’s tuned it.
