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Old 02-19-2013, 12:56 AM
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Default Stock fuel rail question
Im getting ready to install my Begi S4 kit and im kind confused on how to get around my stock fuel pressure regulator. Do i need to buy an aftermarket fuel rail to bypass the FPR. I have an AEM FPR and need some guidance.
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Old 02-19-2013, 09:03 AM
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Install Megasquirt.

Install better injectors.

Sell AEM FPR.

Profit.
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Old 02-19-2013, 11:20 AM
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I used the m-tuned rail for mine so I could ditch the fpr because the 044 pump is just way too much for the oem regulator to handle.
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Old 02-19-2013, 12:44 PM
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What year car is it?
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Old 02-19-2013, 12:51 PM
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Doing a cheap starter kit on bandaids is one thing... doing a powerful S4 kit that will rip a hole in your block on spool up on the other hand....
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Old 02-19-2013, 01:23 PM
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Originally Posted by triple88a
Doing a cheap starter kit on bandaids is one thing... doing a powerful S4 kit that will rip a hole in your block on spool up on the other hand....
'xactly! Don't skip the engine management.
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Old 02-19-2013, 01:55 PM
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Especially when "not skimping" is like $200. You could put on an MS2 for pocket lint.
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Old 02-19-2013, 03:13 PM
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Double post
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Old 02-19-2013, 03:14 PM
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I have a 96 with a begi S4 everything done to the bottom end , MSPNP2, rx7 550cc inj, walbro 255lph pump, aem fpr
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Old 02-19-2013, 03:17 PM
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Sell the FPR and be done.
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Old 02-19-2013, 03:20 PM
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So stock is good enough? Really? 31 psi of fuel is enough that dosent seem right im going to be pushing 15 psi through a gt2860
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Old 02-19-2013, 03:35 PM
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PSI is a measure of restriction, not flow. Your 255 liter/hour pump will flow more than enough fuel.
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Old 02-19-2013, 03:36 PM
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If he's only measuring 31 psi in boost either his measurement is done wrong, or the fpr is broken.
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Old 02-19-2013, 03:42 PM
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No sorry guys that fuel measurement is for a stock system stock fpr stock pump and naturall aspiration. So the consensus is to run the 255lph pump and stock fpr the turbo kit is going on now
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Old 02-19-2013, 03:50 PM
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The MS will take care of the rest for you.
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Old 02-19-2013, 04:14 PM
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I promise you mate, you're not the first one to run 15 psi.
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Old 02-19-2013, 06:16 PM
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I trust you guys thats why i came here i normally search and figure **** out myself hence my post count . I was just making sure i was reading correctly thankyou everyone
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Old 02-20-2013, 12:58 PM
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Originally Posted by Leafy
If he's only measuring 31 psi in boost either his measurement is done wrong, or the fpr is broken.
That is probably idle pressure. IIRC is should bump up to around 45-50 under load.
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