Help with S-AFC2 and 650cc injectors

Ghost1984 · 07-09-2005, 10:03 AM

I have a 90 gst and i just installed some 650cc injectors on it, i already have an afc installed im just not sure how to tune it yet as far as fuel trims, my mods are evob16g, 3" downpipe, straight pipe and atr 3" catback, k&n, ported 2g o2 housing. I got the injectors in, it idles fine but when i start to boost it seems like its choking, and i dont know how much to lean it out on the afc, on the high and low throttle part, if anyone has any suggestions on what i should do please let me know, and i dont have a logger yet

AJ

pickens · 07-09-2005, 10:19 AM

Take two logger pills and call me tomorrow.

Seriously, you need a logger or you will kill the motor or the car will run like junk, period.

Ghost1984 · 07-09-2005, 10:21 AM

Quote:

Originally Posted by pickens

Take two logger pills and call me tomorrow.

Seriously, you need a logger or you will kill the motor or the car will run like junk, period.

lol thanks for the reply, but is there anyway i can tune it on the afc for now so the car runs good because im getting a logger very soon, within next week and i dont ever boost the car that high, never over 15 or anything, stay at around 10-12.

GVR4592 · 07-09-2005, 10:39 AM

what maf sensor are you using?

gman991057 · 07-09-2005, 10:42 AM

if you want to play the risky game of tuning without a logger then start leaning out the high points until the car runs decent. Then even though im sure u could lean it out some more, wait for the logger.

spyderturbo007 · 07-11-2005, 07:35 AM

Tuning without a logger is not a good idea. I would suggest not driving the car until you get a logger. With that said, if you HAVE to drive the car you can do the following. Set the low throttle and high throttle maps to about -20% across your Ne points, provided you car is a 5-speed. Automatics have different size injectors from the factory. Anyway, this is going to result in a rich AFR. This will get you where you need to go, but just STAY OUT OF THE THROTTLE. Keep the rpms below 4k, where the VE of the motor starts to increase significantly, and stay off the boost.

Like I said, the above suggestion is only to be used if you HAVE to drive the car. If not, let her sit until you get the logger.

When you get the logger, then go here:

http://www.racingknowledge.org/topic.asp?TOPIC_ID=1011

Enjoy!