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Swapped out the unmodified venturi piece from my salvage pump assembly. My idle pressure with it is 65psi... So it looks like it was lowered ~5psi from drilling the venturi
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12-27-2016, 08:19 PM
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#11 (permalink) | |
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Premium Member
 
Join Date: May 2013
Location: St. Pete, FL
Posts: 3,848
Drives: 520whp Fire Breather
Rep Power: 86952   |
Swapped out the unmodified venturi piece from my salvage pump assembly.
My idle pressure with it is 65psi... So it looks like it was lowered ~5psi from drilling the venturi just to 5/64...but then nothing gained after that (even after I drilled the whole thing accidentally). I think to start, the venturi system was the bottleneck, but not far after the regulator became the bottleneck... I would speculate that I'd need to drill both the venturi piece and the regulator as directed in the Stillen instructions to get a more normal idle pressure. But as phunk pointed out - my car was tuned with the idle pressure like this.. so I have decided to leave it alone. Fuel pressure now: 
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