trueburton

Any one seen the AFPR tech article on the 3rd Degree website? Does that work good? Any comments or concerns? Thinking about doing it just wanted some feedback before i drill a hole through my current FPR. Thanks

Vader

Yes, but I've updated the article since it was posted there:


TPI AFPR Conversion.pdf

Don't use the ball unless you have access to a variety of sizes to guage exactly what you need. Use the disc instead.

trueburton

what ball and disc are you talking about? And is the regualtar cap aluminum? I heard brazing will burn through the aluminum.

Roostmeyer

iTrader: (3)

the hat is stamped steal. The disc gives the screw your adding something to press down on. Pretty easy mod, just gotta have the tools.

trueburton

i geuss i'm kinda lost with this disc thing. Maybe a picture would help? I didn't see anything on the website.

BigWhiteGTP

I am with Trueburton, I've read this thing but that part always lost me.

trueburton

OK i figured it out. I used a 1/4 inch bearing. It is placed on top of the spring. If you can imagine where the adjusting screw would hit the top of the spring you will see a intentation there. A 1/4 inch bearing ball fits great and the screw pushes down on this.

Vader

That's exactly what you DON'T want to do. Whatever you use to translate the pressure of the screw to the FPR spring needs to contact the spring retainer, and NOT the center shaft of the FPR. If the bolt or ball holds the FPR shaft, it will not allow the FPR to open to regulate pressure. Finding the correct size ball is a trial-and-error process, and just over 0.315" was what I needed in mine. If you slightly distort the FPR cover, you can make space for a steel disc which translates the screw pressure to the spring retainer only.

That's why I generally try to jump in when I see that someone asks about this mod, since that original article is not very clear.

I don't intend to remove and disassemble the FPR from my car to make up another article, but I'll try to sketch something to make it clearer.

trueburton

in the aritcle it says to use a 3/16 bearing though. I think i understand what your saying and i your to late i just put the entire intake back together. As long as i don't apply any pressure the the back side of this bearing i should be ok still. I just can't use the adjustment now until i pull it all back apart and replace the bearing with a disc or larger bearing? correct?

pandorafowler

Why did you need to use 3 nuts for?

1985WS6transam

iTrader: (4)

vader you want mine to use to get better pics lol
I read the article but was a little confused and am too worried about screwing up a part that isnt broken in the first place. My fuel pressure right now is 39 which I hear is a little low so I figured I should get an AFPR what do you think. BTW I dont think my car is running lean, if anything it is running rich. could that be the cause?

8T8IROC

iTrader: (3)

I would go with this:

Holley AFPR for the TPI Fuel Rail (Summit Racing Part Number: HLY-512-501)

It honestly is about the best bang for your buck AFPR on the market for our cars, and the best thing is that the tools you need to adjust the pressure are always with you.