i know there is an article on making the stock unit adjustable but i wanted to hear what everyone thought about the other afprs on the market before i install one
thanks

 

Of all the ones I have seen for sale, the Accel unit is the only one that gives you a new diaphram, instead of using the old one.

~M~

 

My only concern with making your own is that there wouldn't be enough material there for the screw to thread properly. Otherwise it's pretty much a no brainer... well, actually, because of the quarter you've got to place in there, even backed all the way off, your fuel pressure would be higher than stock.

As for aftermarkets.. they're pretty much all the same. I can't remember what brand my first one was, but the cup was a good sturdy piece of aluminum. My only complaint is that the screw it came with stuck up so high it hit my plenum. Now I've got another brand (don't know what brand this one is either... I got it used) but it looks basically the same except it's bare aluminum, which I promptly polished.

 

The Holley AFPR comes w/ a new 2-layer diaphragm and spring, and it's much lower profile and easier to adjust than the traditional "bolt thru the cap" type.

 

agreed. i just swapped out a Hypertech unit for a Holley one. much better design. its much more durable and easier to adjust tha the other bolt types. just dont try to adjust the "thumbwheel" when your engines hot. yeeeow!!!

 

The one thing that I like about the other brands, is that they use the stock FPR hardware. I like using parts that local stores keep in stock instead of stuff that's a week away.

 

That's why a jamb nut is brazed or silver soldered to the spring can. And it you use the ball method or reshape the can according to instructions, you can adjust pressure to well below stock specs as well as the high end:

TPI-AFPR.pdf

 

The TPIS one Sucks

 

You get callouses after a few times. The cheesy-looking "Mechanix" gloves actually do a good job of saving your hands and get good grip on the Holley's adjuster hat.

 

How much will an AFPR help performance?

 

I made my own adjustable one about a year ago and have yet to have a problem with it.

 

It will help you fix <b>100%</b> of your fuel overdelivery or underdelivery problems if you have any.

 

It will?

Do tell

 

Yea, it was kind of a smartazz answer....

If you are underdelivering fuel, you can dial up pressure and compensate. If overdelivering, dial it down.