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Lancer Aftermarket Forced Induction Tech Discuss forced induction related specs and upgrades for custom aftermarket setups.
View Poll Results: How many Psi can the stock fuel system handle?
1 Psi
1
10.00%
2 Psi
0
0%
3 Psi
2
20.00%
4 Psi
7
70.00%
Voters: 10. You may not vote on this poll

How much can it handle?

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Old Jul 18, 2005 | 12:18 PM
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How much can it handle?

How many Psi can the stock fuel system handle?

Btw, I'm asking about air pressure, NOT fuel pressure

Last edited by blaze_125; Jul 18, 2005 at 12:25 PM.
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Old Jul 18, 2005 | 02:00 PM
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I wouldn't even go into positive boost pressure with it stock.
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Old Jul 18, 2005 | 02:52 PM
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Then what would be the most critical? Injectors, pump, or a Fmu
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Old Jul 18, 2005 | 02:57 PM
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pump and fmu should go hand in hand
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Old Jul 18, 2005 | 05:32 PM
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All of the above. I'm sure you could do a few PSI for a little on larger injectors without replacing the pump, but it would fail sooner or later (probably sooner). Assuming you go the raised fuel pressure route, since that's the "easiest" way to do it and easily the most popular, it shouldn't cost more than a few hundred for a pump you probably won't need to replace (Walbro 255lph) and an FMU or rising rate FPR.

Oh, and I wouldn't add an FMU on the stock pump. That's just asking for critical fuel shortages and tragic engine failure.
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Old Jul 18, 2005 | 11:23 PM
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There was once a vid of an Aussie Lancer MR (Mirage) running 12 psi on stock FPR. It can be done. I dont recommend it tho. Run rich and you car shoots black smoke. Run lean, and your car shoots itself.

I would take the time and do it properly. A nice FPR, nice bigger injectors and a nice fuel pump can take care of your fuel needs. AEM FPR is about 150 bucks, 275 cc injectors are about 150 bucks and an Eclipse GSX fuel pump is about 30 bucks.
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Old Jul 19, 2005 | 12:49 AM
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The AEM FPR is quite nice. It's static pressure, but the base pressure is adjustable.
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Old Jul 19, 2005 | 01:21 PM
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Are Fpr units application specific, or are they universal parts???
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Old Jul 19, 2005 | 03:33 PM
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where can u ge those kamikaze headers blaze?
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Old Jul 19, 2005 | 07:39 PM
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Originally Posted by blaze_125
Are Fpr units application specific, or are they universal parts???
25-300 if I remember right. Civic part. Fits like a glove.
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Old Jul 19, 2005 | 07:40 PM
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Originally Posted by DemisedGabe
where can u ge those kamikaze headers blaze?
Topic? What topic? Why don't you try looking at vendors on the forums or try running a websearch? It ain't rocket science.
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Old Jul 20, 2005 | 05:44 AM
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www.bigjoshracing.com

So a Mustang fpr would work as well right?


Do we have any How To regarding the installation of an Fpr. Looking at how it connects would give me a better understanding of how it works and how to put it on.

All New 100% billet construction...

This all new billet adjustable fuel pressure regulator has been improved from our previous design.

This regulator features a Viton 3-layer diaphragm rated at 100 psi constant and 300 psi burst. It is totally adjustable from 30 psi to 100 psi. Like our previous design, it also has a separate port for the vacuum line. This allows for easier adjustment without having to remove your vacuum line each time. It is a direct bolt-in replacement for your stock regulator.

By installing an adjustable fuel pressure regulator, it will enable you to tune your car to the way you want it to respond. It is also one of the first upgrades you need to make to increase fuel delivery.

We also recommend our high-volume fuel pump and our feeder kit. The combination of all three upgrades assures you of the best fuel delivery possible.

Last edited by blaze_125; Jul 20, 2005 at 06:53 AM.
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Old Jul 20, 2005 | 08:10 AM
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I guess that fuel pressure is dependent on Boost level, so what is our stock Fuel Pressure? How many psi should be added per pound of boost??? I think I read 12psi per pound of boost somewhere, is that correct?

So very little knowledge, so many question

If I go with an Fpr, can I drop the idea of using an Fmu or do I need both?
Does the Fpr has to be rising rate, or can it be a static pressure unit(but bumped up every time the boost is set higher)?

Last edited by blaze_125; Jul 20, 2005 at 10:14 AM.
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Old Jul 20, 2005 | 10:02 AM
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The AEM FPR is a simple stock FPR replacement. You'd still need a way of raising fuel pressure under boost with it. Honestly, I wouldn't change unless you're having problems with your stock FPR or fear it may be failing. Otherwise the stock one should serve your needs just fine.

As for install on a rail-mounted FPR like the AEM...2 bolts, 2 hoses. Couldn't be more straight forward.
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Old Jul 20, 2005 | 10:23 AM
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Originally Posted by HobieKopek
The AEM FPR is a simple stock FPR replacement. You'd still need a way of raising fuel pressure under boost with it. Honestly, I wouldn't change unless you're having problems with your stock FPR or fear it may be failing. Otherwise the stock one should serve your needs just fine.

As for install on a rail-mounted FPR like the AEM...2 bolts, 2 hoses. Couldn't be more straight forward.
So I should forget about the Fpr, and just get a 12:1 Fmu??
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