home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 11-14-2017, 12:44 AM   #1
Tfrasca
Board Member
 
Tfrasca's Avatar
 
Join Date: Apr 2015
Location: Aptos, CA
Default Aeromotive FPR - be careful

So, I've had this Aeromotive FPR on my 142 since I did the engine swap. It's about 6 months old, I'd say.

It never help line pressure after the pumps primed, and the needle on the gauge always fluctuated up to 7-8 psi. I was getting my TLAO chips dialed in with my light blue (390cc?) injectors, but I couldn't escape a nasty lean condition under boost toward 5k rpm. Increased fuel pressure to 58 psi, and the FPR would BARELY get there. It should be capable of 30-70psi base pressure, so I took it apart to see what was up.

Sure enough, the hole that the ball valve should seal against was worn unevenly. They apparently just drill a hole, after the base is already anodized, and don't put a radius or chamfer on it. I used a counter sink bit and milled a chamfer on the seat by hand, carefully.

It seals much better now. Still leaks residual pressure after 10-15 seconds, but holds running pressure rock steady on the gauge. I've adjusted FP back down to 43 psi and am actually a bit rich at 12 psi with a 19t.

TL;DR - Be careful with these Aeromotive FPRs. Had I not installed a wideband when I did, I probably would have lost a piston...

Last edited by Tfrasca; 11-14-2017 at 12:57 AM..
Tfrasca is offline   Reply With Quote
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 10:00 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.