Question for Keith

[hi-tech cobra]

Hey Dave,
Great info. Mickmate (Actoncustom.com) will fab up something like that for me.

What about your fuel lines? What size/kind of line(s) did you use? Did you put in a return line? If so, how is it plumbed? Do you run electrics and mechanical pumps?
Thanks,
John

[undy]

Originally Posted by hi-tech cobra

Hey Dave,
Great info. Mickmate (Actoncustom.com) will fab up something like that for me.

What about your fuel lines? What size/kind of line(s) did you use? Did you put in a return line? If so, how is it plumbed? Do you run electrics and mechanical pumps?
Thanks,
John

Hey John, I ran 8AN (1/2") braided hose from my "near tank" mounted Holley Black fuel pump 'n filter up to a 3 way bypass style Aeromotive fuel regulator mounted behind the engine's intake. I have a 8AN return braided hose running back from the regulator to and discharging into the top of the fuel tank. I have an 8AN fuel line running from the regulator outlet up to the inlet of the new fuel log. I've 6AN (3/8") braided hose/fittings from the fuel log outlet to both 750 carbs. It all works well, the fuel pressure stays dead nutz on and I NEVER starve for fuel. It's not OEM looking but it works great.

I had terrible probelms with single fuel line system with flooding the carb at idle. I'd originally thought it was a fuel boiling in the lines problem but found out otherwise. All is well now.

Dave

[hi-tech cobra]

Dave,
What kind of fuel line did you use braided stainless or nylon? Do you have a part number for the bypass regulator?
Muchas gracias!

[undy]

Originally Posted by hi-tech cobra

Dave,
What kind of fuel line did you use braided stainless or nylon? Do you have a part number for the bypass regulator?
Muchas gracias!

braided stainless on the fuel lines.

Here's the regulator: http://www.jegs.com/i/Aeromotive/027/13301/10002/-1

.... and a pic of the fuel system. I know, too much bright colored anodized aluminum..



de nada ...

[Keithc8]

The fuel system that Undy has looks more than over kill for the application. Better to be over kill than not enough. One thing you have to remember on these Cobras is that a lot of time the pick-up is the smallest place on the fuel system. A lot of the cars just have a 3/8 pick-up tube in the tank. This is something that I have talked with Kirkham about. Remember you will starve a single four much quicker than a 2X4 set up. You only have 2 bowls on a single 4 and 4 bowls on a dual 4 so you will drain the bowls down quicker on the same HP engine with the single 4V. I had a 2X4 set up on a Kirkham that made 750HP and ran the number 8 braided line to the front and went throught the manual fuel pump and used a stock log with it drilled out on the front for a #8 fitting. I had an electric fuel pump on the back feeding through the manual pump with the #6 pick-up and did not have any issues on the road course or drag strip. I think the fuel lines, log and the 4 bowls all helped this problem. Remember that you will drain the bowls on a 400HP single 4bl quicker than on a 700HP dual 4bl set up. I think you will be fine with what you are doing.

Thanks, Keith Craft