Which brand have people had problems with?
Which should be avoided?
Which provide the most clearance for adjusting?

Do they all come with a new diaphram, or do you use the stock one (like the first generation Crane ones)?

Mark.

 

well i know a few people who are glad they went with the Holley one, u can get them through www.jegs.com

they seem to clear the plenum fine i think some needed to notch the plenum alittle with a grinder, but its the ease of making adjustments with it that make people buy it.

 

I have the Holley, I like it alot, I did have to shave a tad off the back of the plenum so that it would adjust without interference. It sure is nice to just reach back with you hand and give it a twist with out having to use any tools.

 

How much did you end up paying? I am in Canada ... so just curious what it might be. I'd order it locally ... but I'd like an idea what other's paid.

Mark.

 

ive wondered for a lil while now... whats the diff between the holley one, the other aftermarket ones, and just modding the stock one with a fine thread bolt?

 

I think it boils down to fit, finish, quality and of course design. Holley appears to have put some thought into the design and use of it, hence the large wheel that is easy to access. Some other designs are a right pain in the **** to get access to.

I also like the fact that the holley one comes with all new parts ... no using the old ones. Since your pulling it all apart anyways ... it's a good time to replace these 10+ year old parts.

I actually have an AFPR, but I suspect it is leaking and not holding pressure. Mine requires an allen key to adjust it. Look stock, but is difficult to access ... its a good thing you don't have to adjust it often.

It all depends what you want out of it. I enjoy wrenching on the engine, so I want quality parts that won't give me grief in the long run. Hence I will pay for a good design rather than saving $20 on a lesser design ... even if I won't really adjust it much. Perhaps that sounds odd ... but it's like buying a good quality wrench ... when you need it ... it works!

Mark.

 

Hey Mark. I asked the same question on the board a few months back. The consensus seems to be that Holley makes the best APFRs. And I've heard that you may have to notch your plenum for it to fit but the big plus is that it can be adjusted by hand (like MdFormula350 said). I plan on buying one in the next little while. I got a quote from Davenport Motorsports in Calgary in October and they wanted $135 Cdn.

 

Andy,

I called MoPac in Edmonton and they have them in stock for $129 CDN. Perhaps there is a MoPac near you?

Mark.

 

As far as I know, there aren't any MoPac in Saskatchewan. I'll be making a decision in the next couple of months where I'll be buying my parts from.

 

I just had my car dynoed and it made the most power with the AFPR set at the stock setting and was still a little rich there, although I couldn't go any lower. I feel fortunate that I did the DIY free AFPR instead of spending money on one. I really think you would be better off looking into DIY prom tuning instead of an AFPR, especially if you are planning for future mods (who isn't).
JM$.02,
Charlie

 

My choice for replacing this is simply that I believe my current one does not hold pressure. Plus it is a royal pain to adjust. So may as well put on a decent one.

The nice thing about an AFPR, is that it allows you to make small quick changes if your testing some things out. We all tend to continue the upgrade process, so this is just a simple tool.

At some point, everyone gets to the need for a PROM programmer.

Prior to my new injectors, I had to have my pressure up, but now it seems that 43 or perhaps even lower is all I need now.

Mark.

 

For the hell of it, who makes one with a black housing? Thats what mine is. No clue on brand.

 

Accel or Crane use to make a stock looking one that used an allan key.

Mark.

 

No, has a long bolt. (What a pain to adjust.)

 

vwdave

My guess is you have a stock fpr modified to be adjustable. That is how mine looks too. Black with a hex head bolt in it.

 

I have the Holley - no modifications to install, it was a breeze, and it's a must if you're going to, or have installed a high pressure pump. just be sure to turn the **** (it's harder to turn with pressure applied) in a few turns so that it clears the plenum. I had to turn it in more than that to get 43.5psi from my holley 255lph pump.
Update:
I think I paid $40-60 for mine at Texas Performance Distributors in Houston Texas.

 

on summits web site it says the holley one only fits the 305 is this true?

 

That's the only one Holley lists for the thirdgen F-bodies, 12-501 it's the one I have on my 350. The static pressure for all TPIs is 43.5psi so it's really doesn't matter.