FPR Question

Steve87GN

Oh come on...its just a 6
Dec 3, 2005
169
6
18
37
SF East Bay, CA
home.comcast.net
So, I wanted to post this in another thread I had going, but unfortunately the search function is not letting me get to it. :(

Anyways, in an effort to get the motor dialed in, I'm in the process of prepping to install a new set of 80 lb. injectors and matching chip from TurboTweak. As I recall, one of the steps is to set the fuel pressure to 43.5 PSI with the vacuum line off. I'm running the -237 FPR, so I can't really adjust the fuel pressure. But, to make sure everything is in good shape, I checked the fuel pressure anyways. Showed ~40 PSI while idling, 48 with the line off. Does this sound normal? I'm going to email Eric at TT as well, but will this be a problem? And, if I have to replace the FPR, any good options? I haven't read much good on the new Accufab AFPRs, Holley discontinued their AFPR and the -237 FPRs aren't available anymore from what I can tell (outside of paying $180 to GBodyParts). Thanks as always!!
 

dank GN

BlackArts Automotive (661)993-8277
Jan 11, 2009
3,555
421
83
SoCal the high desert
There is only acouple that will actually work . I’m sure that most use the Accufab regulator . You should be fine with that pressure it is just alil on the high side . The Accufab cost like 150ish .
 

earlbrown

runs with scissors
May 26, 2001
7,062
1,273
113
48
lagrange, GA
Also, Accufabs are garbage. (at least according to powerlogger logs of fuel pressure).


Kirbins FPRs seem to be the best on the market (according to powerlogger logs of fuel pressure). If I were buying one today, It'd be the Kirbins.
 

Dhos1

member
Apr 14, 2012
946
52
28
50
Texas
Not doubting that Accufabs are “garbage”, but I’ve never heard that. Mine works just fine.
 

Pronto

Chaos is a ladder.
Dec 9, 2002
11,905
1,105
113
Nashua, NH
When I tested the 237 on my car the fp was about 44-45 line off. 48 seems high. There may be a restriction in the return line.
 

Reedogg

TB since 1996
Mar 20, 2014
46
13
8
Edmonds, WA
Also, Accufabs are garbage. (at least according to powerlogger logs of fuel pressure).

Kirbins FPRs seem to be the best on the market (according to powerlogger logs of fuel pressure). If I were buying one today, It'd be the Kirbins.
I'd love to see the PL feedback you have on this.
 

Reedogg

TB since 1996
Mar 20, 2014
46
13
8
Edmonds, WA
Thanks Pronto. Wasn't aware of that thread. I have a circa 1998 Accufab FPR. Wondering if this is one of the early better ones. I've purchased the parts to log fuel pressure but haven't hooked it up yet.
 

earlbrown

runs with scissors
May 26, 2001
7,062
1,273
113
48
lagrange, GA
The one's I logged were worse than that (and the Kirbins had a smoother graph).

It could have been because the Accufab I was playing with was brand new so it might have been because the harder steel bearing inside hadn't had a chance to pound itself into the aluminum 45 that's supposed to make a sealing area.

Although, even that wouldn't help the lightweight spring pogoing all over the place.
 

Pronto

Chaos is a ladder.
Dec 9, 2002
11,905
1,105
113
Nashua, NH
Thanks Pronto. Wasn't aware of that thread. I have a circa 1998 Accufab FPR. Wondering if this is one of the early better ones. I've purchased the parts to log fuel pressure but haven't hooked it up yet.
Supposedly the older ones are better. Best to log the fueling with the PL to see for sure.
 

1BUICKTtype

Member
Feb 11, 2018
51
5
8
I heard the Kirbans FPR was the best out of what's available.

What sensor are you guys using to log fuel pressure for the Powerlogger?
 
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