FPR modificating - Tuning Forum

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FPR modificating
Tuesday, October 23, 2007 8:01 AM
ive been piecing together a turbo set-up for a few months now and am finally going to start putting it on the car. and i have only one more question i need answered before i can fully do it myself. so if some one knows the answer and can help me out that would be great. and thanks in advance.

so ive been looking on how to properly hook up the fuel pressure regulator i have, and read that it wont fit in the stock location, so what most do is drill out the stock FPR so that it no longer regulates the pressure and then tie in the aftermarket FPR right after the stock location.
my question(s) is, does this sound like the way to go ? and if so, can someone please give some step by step guides to how to go about drilling it out,
ive tried looking thru posts to find a how-to but came up with nothing.


thanks
jeff



Re: FPR modificating
Tuesday, October 23, 2007 12:24 PM
You need an FMU not an afpr. Some pressure regulators can change pressure with the appearance of vacuum, but most have a very small constant range of pressure they operate at under different circumstances. An FMU uses a vacuum and a ratio to determine how much to increase pressure at a specific psi of boost, it is the old fashioned way of tuning for turbocharging. The right way is to buy hp tuners and fake a 2 bar ve table that way your ecu actually controls fuel like it's supposed to. This question should have been the first question you asked before piecing together a turbo kit. I wouldn't touch your motor until you have done a ton more research, or you risk blowing up your engine.
Re: FPR modificating
Tuesday, October 23, 2007 2:49 PM
David Arestie wrote:You need an FMU not an afpr. Some pressure regulators can change pressure with the appearance of vacuum, but most have a very small constant range of pressure they operate at under different circumstances. An FMU uses a vacuum and a ratio to determine how much to increase pressure at a specific psi of boost, it is the old fashioned way of tuning for turbocharging. The right way is to buy hp tuners and fake a 2 bar ve table that way your ecu actually controls fuel like it's supposed to. This question should have been the first question you asked before piecing together a turbo kit. I wouldn't touch your motor until you have done a ton more research, or you risk blowing up your engine.

The irony of that statement gave me a good chuckle.

But seriously, are you saying that you have a FMU or a FPR? Why in the hell you would want to drill out the stock FPR is beyond me. Why not just take the stock unit out and modify the rail to make the new one fit instead?


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"Youth in Asia"...I don't see anything wrong with that.
Re: FPR modificating
Tuesday, October 23, 2007 3:10 PM
Brian Whalen wrote:
David Arestie wrote:You need an FMU not an afpr. Some pressure regulators can change pressure with the appearance of vacuum, but most have a very small constant range of pressure they operate at under different circumstances. An FMU uses a vacuum and a ratio to determine how much to increase pressure at a specific psi of boost, it is the old fashioned way of tuning for turbocharging. The right way is to buy hp tuners and fake a 2 bar ve table that way your ecu actually controls fuel like it's supposed to. This question should have been the first question you asked before piecing together a turbo kit. I wouldn't touch your motor until you have done a ton more research, or you risk blowing up your engine.

The irony of that statement gave me a good chuckle.

But seriously, are you saying that you have a FMU or a FPR? Why in the hell you would want to drill out the stock FPR is beyond me. Why not just take the stock unit out and modify the rail to make the new one fit instead?


LOL..... probably should mention that I was suggesting just one way to tune for boost, there are others besides faking map readings.
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