Thread: USDM STI yellow side feed injectors - Definitive flow rate

good info, thanks

jwt ecu for sale with these on it if anyone interested!

ok so i tried a few things today with no avail.

first i set them to 1000 (which i think means 1ms) and then i had to adjust my k-value to match cause it went WAY rich. i drove it around an kept tryin to adjust the k to get it right but it just wouldn't do what i needed, it was either to rich at idle an cruise an to lean under an load or just way to lean for both.

so then i tryed 820, which again i think is .82ms same shit. so i set it back to what i had it.

right now the car when warm idles dead nuts on 14.7 and when cruising its at 14.7-14.9, i even had to blip the throttle a few times to make sure the wb was still working cause it was real steady afr. and the WOT afr's are ok, but the map looks funny still.. i'll have to post a pic to show what i mean later..

oh btw this is with the o2 sensor ticked off. it actually runs better this way an more stable afr's lol (prob a bad front o2)

you want to set up your constants and maps without the o2 anyways, post your map when you get a chance I'm curious to see what's going on.

looky what I just found on accident lynch.

Utec Injector Dead time settings for popular injectors - NASIOC

ah good read.

i'll post up the map here in a bit.

No way they can be 1ms... that just seems way to much specially when I have my tune damn dialed in with .75ms

heres what my options look like in nistune and also my fuel map.




now, i know i could mess with the fuel map more to even it out an all that and i have on test maps, but still a little goofy..


edit:

im going to try this tomorrow, i just adjusted the map to look nicer, if it works out well then i'll keep it. i have some nice hills to go up around here so i dont always have to go fast to get load on the engine



but even that map looks a tad funny.. i've never had to lean the top out so much to get the afr right, usually when i've been tuning i've had to add fuel up top.

on the other hand these are bigger injectors so maybe im just retarded

I assumed that you were using a map with values instead of targets. If you're using a target map and a wideband I wouldn't worry too much about it. I've always kept the practice of tuning without o2 input until I have a decent tune and then adding in the o2 input to fine tune things. I don't have any o2 input at all on my car, just a wideband to monitor afr's.

Got another set, and had them cleaned and tested at Deatschwerks. They flowed between 519 & 526, so that's one more data point for these being 520cc@3bar



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