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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 05-21-2007, 12:53 AM   #21
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vishnu should still sell with FM, the FP comes off a barb fitting, for 5/16 line. and the 190 is most likely your problem it will not supply enough fuel for 300+ whp at extreme pressure check the site i posted for specs what FP are you running ulitmatly?
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Old 05-21-2007, 12:56 AM   #22
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http://www.flyinmiata.com/index.php?...#37;20%2090-93 psst i found one 200 bucks the stock dual feed is frigin easy as well though
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Old 05-21-2007, 10:27 AM   #23
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Quote:
Originally Posted by magnamx-5 View Post
becouse his stock fpr raises 1-1 ratio, with boost. duh :gay:
From my understanding the vacuum line on the fuel pressure regulator provides constant pressure differential between fuel in the rail and manifold air pressure.

it's also limited to 50psi....so if youre seeing 75psi of fuel at 25psi of boost it's because you did something to achieve this.....correct?
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Old 05-21-2007, 11:23 AM   #24
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Quote:
Originally Posted by Braineack View Post
From my understanding the vacuum line on the fuel pressure regulator provides constant pressure differential between fuel in the rail and manifold air pressure.
Yes, this is correct, it works identically for boost. You have a spring pressure in the FPR, in this case it's set to 50psi. Add 1psi of boost, you get 51psi, take away 1psi and you get 49psi.

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Originally Posted by Braineack View Post
it's also limited to 50psi....so if youre seeing 75psi of fuel at 25psi of boost it's because you did something to achieve this.....correct?
If you add 1psi to the manifold source of an FPR it's like adding 1psi to the spring pressure. It's a simple device, I don't see how it could be limited to 50psi. It's very similar to a DSM FPR, the only limiting factor on them was volume, they'd get overrun with very large pumps, I think you guys have discovered this as well.
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Old 05-21-2007, 11:51 AM   #25
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yeah im having a brain fart today and confusing myself....
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