newbie..have a question.
09-17-2003, 06:50 AM
#1
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newbie..have a question.
Hey everybody I'm new to the forum and I have a question. I've done some research on the topic but can't seem to get it exactly right. What I have is an IHI VF32, STi pink injectors, factory downpipe, aftermarket exhaust manifold & up-pipe, a 3" mandrel bent catback, and Injen cold air intake with the stock intercooler. I was just wondering how many psi to stop at without the larger downpipe and intercooler. Any help is greatly appreciated.
09-18-2003, 08:07 PM
#4
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Join Date: Nov 2002
Location: Reno, NV
Posts: 18,369
Car Info: 1993/2000/2001 GF4 mostly red
With that much in mods, you really need to get better engine management to control your boost and ignition timing. The car will run much better and be noticeably faster. As it sits, I would not allow it to be leaner than 12 to 1 under boost, less if you can.
09-19-2003, 08:37 AM
#5
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12:1?
Well, that's so rich that you'll almost be blowing out the spark on your stock spark system. Watch that S-AFC, the Sub. computer starts to slowly recalibrate itself until the S-AFC does absolutely nothing positive. If you see your A:F gauge consistently at about 14.1:1, then you know the computer took over. It took about 3 weeks until mine ignored me. I'm ditching it in favor of a RRFPR until I can afford real engine management.
7
Well, that's so rich that you'll almost be blowing out the spark on your stock spark system. Watch that S-AFC, the Sub. computer starts to slowly recalibrate itself until the S-AFC does absolutely nothing positive. If you see your A:F gauge consistently at about 14.1:1, then you know the computer took over. It took about 3 weeks until mine ignored me. I'm ditching it in favor of a RRFPR until I can afford real engine management.
7
09-19-2003, 09:10 AM
#6
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Posts: n/a
well, i think next im going to get a front mount intercooler and a downpipe. what engine management has everyone had luck with? i know that the aem is hard to tune and i haven't really heard anything about the greddy e-manage. thanks alot for all your help.
09-19-2003, 01:49 PM
#8
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Join Date: Nov 2002
Location: Reno, NV
Posts: 18,369
Car Info: 1993/2000/2001 GF4 mostly red
Originally posted by impreza7
12:1?
Well, that's so rich that you'll almost be blowing out the spark on your stock spark system. Watch that S-AFC, the Sub. computer starts to slowly recalibrate itself until the S-AFC does absolutely nothing positive. If you see your A:F gauge consistently at about 14.1:1, then you know the computer took over. It took about 3 weeks until mine ignored me. I'm ditching it in favor of a RRFPR until I can afford real engine management.
7
12:1?
Well, that's so rich that you'll almost be blowing out the spark on your stock spark system. Watch that S-AFC, the Sub. computer starts to slowly recalibrate itself until the S-AFC does absolutely nothing positive. If you see your A:F gauge consistently at about 14.1:1, then you know the computer took over. It took about 3 weeks until mine ignored me. I'm ditching it in favor of a RRFPR until I can afford real engine management.
7
09-19-2003, 03:53 PM
#10
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Car Info: 1993/2000/2001 GF4 mostly red
Originally posted by EvoHunter
why not ?
why not ?
09-24-2003, 08:14 AM
#12
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A RRFPR mechanically raises the pressure of the fuel in your system by physically blocking the fuel return line. This blockage is caused by a diapgragm that uses boost pressure to deflect and "block" the return line. Fuel pressure on a subby is all mechanical, your ECU doesn't controll any of it.
09-24-2003, 05:43 PM
#13
Sarcastic Jackass
Join Date: Dec 2002
Location: Western Washington
Posts: 622
Car Info: i drive a beater
Originally posted by BAN SUVS
You cannot, repeat NOT, run stoich on a turbocharged small engine.
You cannot, repeat NOT, run stoich on a turbocharged small engine.
It's really easy at cruise and at idle if you know what you're doing (by the way a RRFPR is not included in the "know what you're doing" statement)
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