i just got the car ut back together after polishiing everything up. and trying to get my fuel pressure regulator to be adjustable.
see https://www.thirdgen.org/techbb2/sho...hreadid=152162
and i kept the steel ball bearing that was like .315" and i made sure there was nothing inside the cap that would get in the way, and that the jb weld didn't get into the hole in the cap.. and it didn't. and i had tried to press the cap outward 1\8 of an inch with a c-clamp, but im not sure exactly how far it did go out.
so anyways i got all of the car put back together, and decided that i would hook up the fuel pressure gauge to check for leaks before starting it. the first two times i turn the key to 'run' there was no pressure. so i tried to start it quickly and turn it back off, i did that and it eventualy started. so i checked the pressure. and it was at 80!!!!!!!!!!!!!!!!!! i bled the pressure, turned the key to prime the pump, and it jumped to 50!!!!!!! should i have taked out that ball bearing? or is there a chance something else is screwed up? i need my car!!
see https://www.thirdgen.org/techbb2/sho...hreadid=152162
and i kept the steel ball bearing that was like .315" and i made sure there was nothing inside the cap that would get in the way, and that the jb weld didn't get into the hole in the cap.. and it didn't. and i had tried to press the cap outward 1\8 of an inch with a c-clamp, but im not sure exactly how far it did go out.
so anyways i got all of the car put back together, and decided that i would hook up the fuel pressure gauge to check for leaks before starting it. the first two times i turn the key to 'run' there was no pressure. so i tried to start it quickly and turn it back off, i did that and it eventualy started. so i checked the pressure. and it was at 80!!!!!!!!!!!!!!!!!! i bled the pressure, turned the key to prime the pump, and it jumped to 50!!!!!!! should i have taked out that ball bearing? or is there a chance something else is screwed up? i need my car!!
Supreme Member
50 is good! I get 51 psi out of mine. Try it again and see if it stays at 50psi. If so your good to go.
Supreme Member
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<b>03 January, 2003 (AP) Bedford, TX:</b> A young man was injured today when his car exploded. Witnesses reported hearing him saying "I TAKED OUT THAT BALL BEARING!!" shortly before the explosion. Film at 11.
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That poor car.
<b>03 January, 2003 (AP) Bedford, TX:</b> A young man was injured today when his car exploded. Witnesses reported hearing him saying "I TAKED OUT THAT BALL BEARING!!" shortly before the explosion. Film at 11.
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That poor car.
LMFAO!
That's a good one, Kevin...
Breathe,
I used the ball bearing in my FPR, but had to go a size larger to make sure the ball did NOT contact the center plunger in the valve mechanism. If the ball contacts the plunger and does not allow it to unseat, the pressure will remain at the full capacity of the pump. In that mode, the pump won't last very long. Make absolutely sure that the valve disc pin in the center of the spring cannot touch the steel ball. If it is even close, you need a larger ball, or you can opt to use the steel disc instead.
Just for grins, which article are you reading? The one I have posted frequently has a warning about the ball size. There are other copies floating around on the web that are earlier drafts and don't have the instructions and cautions about the ball size.
This is what I currently have:
TPI-AFPR.pdf
That's a good one, Kevin...
Breathe,
I used the ball bearing in my FPR, but had to go a size larger to make sure the ball did NOT contact the center plunger in the valve mechanism. If the ball contacts the plunger and does not allow it to unseat, the pressure will remain at the full capacity of the pump. In that mode, the pump won't last very long. Make absolutely sure that the valve disc pin in the center of the spring cannot touch the steel ball. If it is even close, you need a larger ball, or you can opt to use the steel disc instead.
Just for grins, which article are you reading? The one I have posted frequently has a warning about the ball size. There are other copies floating around on the web that are earlier drafts and don't have the instructions and cautions about the ball size.
This is what I currently have:
TPI-AFPR.pdf
Vader,
I the tech article i was refering to was the one u have listed in ur post. as when i was searching for a good AFPR u refered me to ur article. I think my problem was that maybe i didn't bend the center of the cap out enough.. or maybe the ball bearing was to small. i am pretty sure i measured it to be a little bigger then .310" if i could find my micrometer i would measure again right now. but i will do so tomorrow.. i did remove the ball bearing and attempt to push the center of the cap out some. and i am not getting about 38 psi.. but i haven't started the car yet as the plenum is still off.. i will know for sure tomorrow. i have taken the plenum on an off way too many times in the past two days..
thanks!
I the tech article i was refering to was the one u have listed in ur post. as when i was searching for a good AFPR u refered me to ur article. I think my problem was that maybe i didn't bend the center of the cap out enough.. or maybe the ball bearing was to small. i am pretty sure i measured it to be a little bigger then .310" if i could find my micrometer i would measure again right now. but i will do so tomorrow.. i did remove the ball bearing and attempt to push the center of the cap out some. and i am not getting about 38 psi.. but i haven't started the car yet as the plenum is still off.. i will know for sure tomorrow. i have taken the plenum on an off way too many times in the past two days..
thanks!
Breathe,
You can assemble the fuel rails and test the line pressure (and regulator function) without compleely assembling the plenum and runners. If my memory is any good, I ended up using a 5/16" (0.312") ball in mine. It was very close to the valve stem, but still had some clearaince. The bal must contact the stamped spring retainer cap ONLY and not touch the center valve stem. If the ball does not touch th eretainer all the way around, you need a larger ball. If the ball becomes too large, it will also be too tall, so you may want to install the flat steel disc instead. A steel 3/4" knockout blank from an electrical box is about the ideal diameter. Since you've already raised the top of the spring can for clearance, you should have a full range of pressure control with the disc. You're not the only one that has reported problems using the ball instead of the disc. It seems that the regulator designs or tolerances may have varied a bit from vehicle to vehicle. The neat thing about the ball method is that it doesn't raise the cap and provides a little more clearance when the plenum is reinstalled, but it may not be worth the trouble.
(NOTE TO SELF: So many people seem to have trouble sizing the ball that the article may have to be changed to advise the steel disc only.)
You can assemble the fuel rails and test the line pressure (and regulator function) without compleely assembling the plenum and runners. If my memory is any good, I ended up using a 5/16" (0.312") ball in mine. It was very close to the valve stem, but still had some clearaince. The bal must contact the stamped spring retainer cap ONLY and not touch the center valve stem. If the ball does not touch th eretainer all the way around, you need a larger ball. If the ball becomes too large, it will also be too tall, so you may want to install the flat steel disc instead. A steel 3/4" knockout blank from an electrical box is about the ideal diameter. Since you've already raised the top of the spring can for clearance, you should have a full range of pressure control with the disc. You're not the only one that has reported problems using the ball instead of the disc. It seems that the regulator designs or tolerances may have varied a bit from vehicle to vehicle. The neat thing about the ball method is that it doesn't raise the cap and provides a little more clearance when the plenum is reinstalled, but it may not be worth the trouble.
(NOTE TO SELF: So many people seem to have trouble sizing the ball that the article may have to be changed to advise the steel disc only.)