TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Holley FPR adjustment,

Old May 23, 2004 | 11:35 AM
  #1  
Mr.Crackhead's Avatar
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From: LaFollette, Tn.
Car: 1990 Formula
Engine: 355
Transmission: T5
Holley FPR adjustment,

ok guys simple quetion. Will screwing th eallen in or out raise my fuel pressure on my Holley 670?
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Old May 23, 2004 | 03:21 PM
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Engine: 377 LSX
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Screwing it in raises the pressure.
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Old May 23, 2004 | 03:23 PM
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From: LaFollette, Tn.
Car: 1990 Formula
Engine: 355
Transmission: T5
THX shifty, I went the wrong way.
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Old May 23, 2004 | 06:44 PM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by Mr.Crackhead
THX shifty, I went the wrong way.
Hey no problem. The general rule of thumb for adjustbale regulators is every 2.5 turns is one PSI. There are slight vavyences though depending on spring size though. You should always start with the screw flush and go from there.
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