82 XFire fuel pressure ?
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 3,416
Likes: 291
From: dayton oh
82 XFire fuel pressure ?
With the 85 fuel pump upgrade, how high can you adjust the FP before either the injectors, regulator or CPU cant take it ?
If you plumb the TBIs in parallel, how much FP can you run then ?
Thanks
If you plumb the TBIs in parallel, how much FP can you run then ?
Thanks
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
A stock CFI FPR "WILL NOT" go as high as you need to feed that ZZ motor, that's why I suggested you go to the Aeromotive Universal external FPR which comes with two different springs and you choose which one you want to run to achieve the FP you need/want. 80/90# injectors will take up to about 35psi, after that all bets are off on reliability. I run 24psi. Parallel plumbing has nothing to do with how much FP you can run, just another way to plumb the fuel to accommodate the external FPR with blank off plates on each TB.
Last edited by Buccaneer; Nov 1, 2018 at 08:24 PM.
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 3,416
Likes: 291
From: dayton oh
Sorry, given our recent IMs i see how this might have been confusing:
1982 stock Xfire motor, 85 fuel pump installed, rebuilt TBIs: we were wondering how much we could up the FP on the injectors for more performance.
1982 stock Xfire motor, 85 fuel pump installed, rebuilt TBIs: we were wondering how much we could up the FP on the injectors for more performance.
Safety Car
Joined: Nov 2005
Posts: 3,532
Likes: 1,185
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
Stock motor, 13psi is all you need to have it run just fine. You will not get any more performance out of it at higher FP.
