Comptech AC Info needed..

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Jul 14, 2010 | 06:02 AM

#21

SeanSerino

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Joined: Mar 2008

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From: Morristown, NJ

4.2/.25 will get you ~7psi on AP1. 4.0" gets ~7psi on AP2. 4.0" on an untuned AP1 = blown up motor.

Jul 14, 2010 | 06:39 AM

#22

rikhemi

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Joined: Feb 2004

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From: Miami, FL

I will tune it with a VAFC. with 7psi i would hope that sufficient.

If i raise the FPR to max or 5 from what I see on the gauge, does that mean my car runs at that pressure when only on boost or all the time?

Im purchasing a Air Fuel gauge and oil pressure gauge to prevent any engine blowups..lol..

Jul 14, 2010 | 07:03 AM

#23

SeanSerino

Registered User

Joined: Mar 2008

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From: Morristown, NJ

The standard CT FPR is a rising rate FPR, so as the boost increases, so does the fuel pressure.

I could be wrong, but I'm pretty sure about that.

Jul 14, 2010 | 10:23 AM

#24

goldenfri

Community Organizer

Joined: Nov 2005

Posts: 16,673

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From: Maryland

Quote:

Originally Posted by rikhemi,Jul 13 2010, 12:02 PM

Regarding it being lean at readline, if i have the stock exhaust with testpipe do you think I would have that same issue running a 7-7.5 psi.

Regarding ASP, do you prefer them over science of speed. How are their prices if anyone has used them before?

One more thing, just to confirm what I searched here, the VAFC can add fuel right? I know it can remove fuel.

Reason i ask is if I were to get the 7-7.5 psi pulley, and i up the FPR, would I be running like crap normally or would maxing that out just mean when the boost is kicking in? I have read normally they up the FPR and then lean it out with a vafc. Is that the best method?

I used ASP, they were good. There was some lead time and I think the price is somewhere around $100. SoS only makes certain smaller sizes now, so if you need a different size you will have to go somewhere else.