AFPR or Vaccum FPR
Member
Joined: Dec 2001
Posts: 243
Likes: 1
From: NH
Car: 93 9C1 Caprice
Engine: 5.7
Transmission: 700R4
Axle/Gears: 3:42
Depends on what you are trying to do. With your mods, I wouldn't do either. Changing the pressure with a AFPR will obviously raise the pressure all the time and could create some rich conditions for you at lower RPMs. THe vAFPR is a way to get more fuel flow through the injectors to meet lean conditions on modified engines that the stock system just can't meet, primarily at high RPMs.
Hope that helps.
Hope that helps.
Joined: Dec 1999
Posts: 5,964
Likes: 37
From: Hacienda Heights, CA
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
If you decide to use the vafpr, you will discover the spring supplied with it is too strong. The spring that came with your stock non-adjustable fpr is too weak. I have a replacement spring available for $5 including s&h. E-mail me if you want one. Lon
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