Carbureted LSX forum - Fuel Line size ?
07-14-2012, 09:39 PM
I have a Holley Blue pump on the car. It has -10an from tank, thru filter into pump. It has a -8an line running out of the pump to the front of the car. I'm running the standard Holley regulator that comes with the Blue pump.
What's the best way to get from the regulator to the carb?
Thought about -8an to the inlet of regulator, but not sure if I should stay -8an to the bowls or go to -6an.
What do you guys think? and How and where did you mount your regulator?
07-15-2012, 06:32 AM
Very old pic with the old 406SCB....
Ran -8 hard line from pump to reg. then -8 braided to carb. And will be using same set-up with LSx motor too.
Never a problem is a friends 9.2x 1/4 ET Nova (where this set-up came from).
Pop N Wood
07-15-2012, 07:57 AM
I put the regulator on the firewall, to a 10 micron filter on the fender and from there over to the carb. Most fuel pump directions say to run a 100 micron filter before the pump and a second, finer filter before the carb. If I had to do it again I think I would out the regulator right on the intake manifold and run two lines from that to the front and back of carb. I think my regulator chatters sometimes at idle and the noise is amplified being on the firewall.
Unless you are turning massive HP AN-6 from the regulator to carb will be fine.
07-15-2012, 09:02 AM
I put the regulator on the firewall.
Big no no IF you plan to run at the track.
07-15-2012, 09:11 AM
Here's my dilema. I have 2 -8an fittings that are already ran to the inner fender of the car. I was hoping to utilize them (see pic 1) so I don't have to run the line from the pump again since this is already here. It looks like a straight shot to the regulator if I mount it at the carb like pic 2. But this setup is about $150 not counting the line it would take to get from the inner fender to the regulator and I've never seen a regulator mounted upside down that way, but guess it doesn't matter.
Pic 3 would be cheaper, but I'd have to mount the regulator somewhere and make a line from inner fender to it and another from the outlet to carb. ugh
07-15-2012, 08:44 PM
Here's how I mounted my regulators. The one closest to the passenger side feeds the carb and is mounted to a bracket I made that mounts it to the cylinder head. The regulator closest to the driver's side will eventually feed a fuel solenoid for a N2O plate kit. It's mounted on a very simple home made bracket and held in place by one of the valley cover bolts. Both regs are being fed from a bypass regulator mounted on the front of the inner fender. Maybe this will give you some mounting ideas.
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