krazy_1st_gen

i can't seem to find a raising rate FPR for sale. i looked on summit and jc whitney but can't find nothing. can some body tell my where you got yours from so i can pick one up and finish my project. i manifold is almost complete, so im ready for boost and mayb some juice from the blue bottle. please help me out.

hiboost7

i bought mine from a shop but its a mallory part # 4309.
thats the one im using and i heard its like the best....about $95

CarlRx7

here is the one that i got.

http://store.summitracing.com/partde...rt=AEI%2D13301

seanrot

iTrader: (2)

I got this one from here

http://www.centuryperformance.com/de...t_id=MAL-4307m

installed still working on getting the turbo in there

peejay

You do *not* want a rising rate regulator. That would be bad.

What you want is a boost referenced regulator.

A rising rate regulator increases fuel pressure faster than the air pressure - so say 1psi boost raises fuel pressure by 2 or 3 psi instead of just one PSI like a standard pressure-referenced regulator.

bcty

you can buy riseing rate regulators in any type of increment you want.. 1/1 1/2 1/3

Gregs

mallory 4309 is the way to go

Gregs

mallory 4309

Directfreak

iTrader: (2)

For a carb setup, definately the 4309!

mwatson184

Yep I run a 4309 also. Aeromotive has a nice one as well. I think it is aeromotive part number 13202 or 13204, can't remember.

Marques

seanrot

iTrader: (2)

You guys dont like my 4307? It's the replacement for the 4309

dirty86

ok so how does that work is that for a carb that isnt presurized (just a hat)??

or what since i want to turbo someday this would be nice to know

ioTus

iTrader: (5)

I had the 4307, didnt work, i threw that piece of **** in the garbage. It was leaking out of every crack it had, and just didnt work anyways!!!!.

Mallory 4309 is what you want. And yes you DO want a rising rate regulator. (mallory 4309).

Not too expensive, you can buy it anywhere (jegs, summitracing.com, etc).

You should also get a new fuel pump, if you havent already (MSD electronic fuel pump is cheap and works well i hear. i ordered mine yesterday)

Gregs

one other cool thing about the 4309 is the boost reference it has to compensates more fuel as the boost pressure rises

seanrot

iTrader: (2)

It needs a vacuum/boost signal to raise the fuel preasure. since im not turbo yet it's just a normal fuel pressure regulator without a signal.


Yeah, I seem to remember a picture of that with a towel wrapped around it. I also dont believe it was the regulators fault. I have all the nessecary O-rings on mine and teflon taped the other fittings and it doesnt leak at all. Did anyone bother to look at the link on this one.

The 4309 is adjustable from 3-12 psi
The 4307 is adjustable from 3-25 psi

ioTus

iTrader: (5)

yes but those are BASE PSI's. if you need anything more than 12psi for a CARB, dizayamn....

I mean, i run mine HELLA rich at idle at 7psi.

seanrot

iTrader: (2)

I was under the impression that for every lbs of boost you want your regulator to add 1 psi. I dont think anyone has said that there is a limit to how high those number should go or if there is a cap to the fuel psi say 12 psi will handle 14lbs of boost

Well, I figure it this way if your running say 4 psi at idle not boosted, the 4309 will only let you run 8 psi of wiggle room till its outa your regulators useable range. Your running (im guessing on your idle psi) 7lbs of boost leaving you 1 psi of safety. Yes your running hella rich but (never wish this on anyone) what if you get a nasty boost spike (wastegate signal get interupted)?

Thats was my main reason for going with the 4307 with the GSL-SE fuel pump behind it. I have the pressure in reserve. I may never need it but you never know. I can run 14 lbs of boost and not worry about fuel starvation from the limit of the regulator.

Im talking all this **** and still dont have a turbo on the car lmao hopefully next week I will take the header off and start on the turbo exhaust.

I got my float back from robert took about a week (can you believe it) got some neat rotary shack stickers too. The carb is ready to go back on the car, too bad I have to goto ohio for easter weekend to be with family. I would love to spend the weekend wrenching on the car.

4307 has that too.

ioTus

iTrader: (5)

You'll need a new fuel pump. the GSL-SE will cause it to lean out at high rpm in high gear (flooring it in 3rd, 4th, and 5th). I suggest the MSD one.

Looking at the product description, it says the "ADJUSTABLE range" is from 3-12psi. That means thats what you can adjust the base PSI to. The unit would be USEless as a rising rate if it could only go as high as 12. I know for a fact it can go higher, as i have a fuel pressure guage on the fuel line coming out of it. I mean, correct me if i'm wrong, but it seems to me this product would be entirely pointless if this was teh case. It would make it so you could run only aout 3 or 4 pounds of boost....

You just have to make sure that the fuel pressure regulator is hooked up to a 100% stable vacumn pull nipple, otherwise you will bog out as the signal waves around. (in other words: if the fuel pressure guage is goin crazy all over the place, find a different vacumn nipple!)

hiboost7

for pumps i suggest SX performance pump....kinda pricey at $240 though. the gsl-se will not work

ioTus

iTrader: (5)

The MSD one is $87 shipped. THats why i got it (i'm broke, i spend too much on the car!)

seanrot

iTrader: (2)

ok, that makes sence but how high can it go?

ioTus

iTrader: (5)

seems to me it could go as high as you could put gas into it...

straight in/straight out would be whatever your fuel pump would be dumping at, with near none being returned to the tank.

hornbm

It says right on that right that the site that the 4307 replaces the 4309 in the mallory product line.

I might consider trying the 4307, as I'm having fuel delivery problems withe my 4309. The carb allways starves for fuel, and I know it isnt the fuel pump. (GSL-SE fuel pump pumps more than enough fuel)

680RWHP12A

hmm that pump and regulator should work great for your setup.... try turning up the fuel pressure, that will help...

coldy13

The gsl-se pump WILL work, many people are using it.