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Old 02-14-2001, 09:47 AM   #1
brendon
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Member#: 3618
Join Date: Jan 2001
Location: billings,mt
Post turbo accesories question

it seems to me that i've heard people having the best luck with a 5:1 rrfpr for mild boost applications 5-8 lbs jus trying to confirm this. also wondering what fuel pumps seem to work the best for the same set up. and are exterior fuel pumps too loud or should a guy go for the in tank style. thanks for the help.
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Old 02-14-2001, 09:50 AM   #2
Pipercub
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Member#: 2188
Join Date: Aug 2000
Location: Remington VA`
Vehicle:
2004 Impreza STI
82 BRAT with 12 in. lift

Post

I have a 4:1 and my SAFC enrichment rises up to about 14% at it's peak. I am sure with a 5:1 I would have it leaned out a bit so a 4:1 or 5:1 should get you to just either side of the desired fuel curve.
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Old 02-14-2001, 05:51 PM   #3
Tim Prudence
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Member#: 216
Join Date: Aug 1999
Location: san diego, ca USA
Post

I have a 5:1 rising rate regulator, it's a begi type that doesn't start working until around 5 psi. So my fuel pressure is:

0 psi 40 lbs
1 psi 41 lbs
2 psi 42 lbs
3 psi 43 lbs
4 psi 44 lbs
5 psi 65 lbs
6 psi 70 lbs
7 psi 75 lbs

Well you get the point. I'm using this one because I heard (a long time ago in a post from Shiv) that we don't really need any extra fueling until your running higher boost levels. It seems to work well for me.

I'm also using a supra tt fuel pump, it's a venom performance rebuilt pump and it works nicely and is quiet. Pretty easy to install too.
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Old 02-14-2001, 10:56 PM   #4
tluzziracing
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Post

walboro fuel pumps are great.

im useing a 4.1 rrfpr,vortech
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