View Full Version : Help Build My Fuel System..


dragon0123
May 11th, 07, 11:19 AM
I am currently redoing my 67 Camaro. It will be used occasionally on the strip, but mostly street driving. My problem arises that I hate redoing things that can be done once right the first time. So in my reassembly of my car I want to get the fuel system done right. Here’s my current dilemma, as my car goes back together it will have to be built up motorwise. I currently have a running 350 that will go in while I rebuild a 454 to a stroked 489, after the 489 is built, a procharger may be added to it. So as I am going in stages and I want my fuel system to be right for all 3 stages..

Here’s the thoughts Ive had so far.

I don’t really want to run a sump on the tank so I am going to put a ½ pickup tube in it.

Mallory 140 electric (which Ive heard supposedly are quiet.)
Mallory 4 port regulator vac/boost referenced
½ forward fuel line
½ return fuel line
Filters before pump and after the regulator

This should be plenty overkill for the 350, just right for the 489, and hope enough for the supercharged 489...

Any other suggestions/concerns?

Drag Fabricator
May 12th, 07, 10:31 PM
I have mine setup with a filter before and after the pump....you really dont need one after the regulator, and some may argue that if you have one before the pump that is also plenty.

why a 4 port regulator? unless you're plumbing two carbs or one carb and a nitrous system, a 2 port regulator is what you want.

If you're serious about the procharger setup, i'd use a Magnafuel quickstar 300 and a magnafuel two port regulator. If you get the pump without the built in filter it will be a little easier to plumb under the car, unfortunetly its a LOUD pump.

dragon0123
May 12th, 07, 11:45 PM
actully its Mallory unit 4307M.. which is a 3 port unit.. 1 input, 1 return out, and 3 outputs, (1 for a pressure guage. 2 to the carb.)

Anybody see any problems running a filter right before the regulator?? mostly ive seen examples run a filter after the regulator.

really dont want a loud whinny pump.. and the Magnafuel quickstar 300 is not cheep either,,.. not that I want cheep but ive got other concerns to address as well..

JimM
May 13th, 07, 06:27 AM
Your plans sound good. Only suggestion I would make is to plumb it in hardline, and to make the return the same size as the supply.

I'd lean toward alluminum hardline. It looks almost as good as SS, but is much easier to work with. It's nearly impossible to bend 3/8" SS with conventional tools, I could not imagine trying to bend 1/2" SS.

Another thing worth thinking about is if your procharger setup will someday include EFI. Would be real handy if your new system could be converted just by taking out the current pump and slipping in an external EFI type pump.

dragon0123
May 13th, 07, 09:19 AM
Yes hard aluminum line was what I was planning on running. The frame is off the car now anyway so it shouldnd be a problem.

Drag Fabricator
May 13th, 07, 05:51 PM
I disagree about the aluminum hardline, i dont like to see aluminum hardline. I'd use braided lines before using that.

I'm using stainless hardline, a pre-bent line that fit perfect, and i know the same company will make them in 1/2".....so thats what i would do is buy two of them and use one as the return, one will obviously need tweaking to fit.

Might not be cheap, but a 140 mallory isnt cutting it for a procharged setup.....which is fine you can switch the pump when you get to that point, but your first post didnt sound like that was your plan.
Brian

dragon0123
May 13th, 07, 06:46 PM
I disagree about the aluminum hardline, i dont like to see aluminum hardline. I'd use braided lines before using that.


Strength not good enough..? ive never delt with it.


Might not be cheap, but a 140 mallory isnt cutting it for a procharged setup.....which is fine you can switch the pump when you get to that point, but your first post didnt sound like that was your plan.
Brian

Brian how much GPH/psi unit should I be looking for with a 489 supercharged to about 650-700hp??

V-12-Camaro
May 13th, 07, 07:03 PM
The pro charger will be blow-through, right?
You'll need a boost referanced fuel regulator. Make sure the one that you're looking at has the vacuum/pressure port.

dragon0123
May 13th, 07, 07:30 PM
Yes itll be blow though... mallory regulator mentioned is boost referanced..

while im on the topic.. anybody that has a blow though supercharger can recomend a good carb.. im partial to Holleys..

Drag Fabricator
May 13th, 07, 09:50 PM
Strength not good enough..? ive never delt with it.



Brian how much GPH/psi unit should I be looking for with a 489 supercharged to about 650-700hp??


Aluminum tubing isnt what i would consider the safest, aluminum work hardens and cracks in thin tubing, so i wouldnt want it in a street car.

I would use the pump i suggested or something in that range.

V-12-Camaro
May 14th, 07, 07:34 PM
I just finished my friend's twin turbo Camaro. He had thoughts of building a Pro-charged small block until I suggested using twin turbos.
His carb is a Holley 850 HP series built by a company called CSU (csu.com). It's designed for a blow-through system (currently @ 10psi) and worked great out of the box. It is a little on the rich side, but to bolt something on and have amazing results is almost unheard of.

Pic of carb and hat:
http://themagicm.homelinux.org/phpgallery/picture.php?/2893/category/86
There's a whole library of pics and vids on the build, so look around.