I need to know the fuel line diameter I should use to support over 450HP in a GSL-SE.



One complication is that it will be carbed. And no it's not getting a boinger.



Would a stock GSL-SE tank's sumped pickup be big enough? Doesn't it funnel down to 5/16" or 8mm before it reaches the pump? I should probably spring for a fuel cell huh...



Doesn't it work kinda like electricity where voltage is the pressure and amps is the volume? At low voltages, really heavy gauge wires are needed for high amp loads, but at higher voltages, you can accomplish a lot more with smaller gauges.



If it was injected I'd think 3/8" would be enough, but since it's carbed, shouldn't I go with a larger diameter line to make up for the lower pressure? How about 1/2"?

3/8" will work up to the regulator, if you are going to run a 1/2" line you better have a big fuel pump https://www.nopistons.com/forums/pub...IR#>/smile.png

i think electricity and liquid flow do have a lot in common.



the gsl-se has a big line from the tank to the pump, its something like 1/2", which is fine. the tank is baffled well for a stock car.



my guess would be a good pump (bosch pumps almost bolt in, and all the cis cars has external pumps, hint hint), and then going from 5/16th to 3/8", or running 2 5/16ths lines would be just fine.

Okay, you talked me into it. 1/2" sounds good. 3/8" would be an absolute minimum, but I think in this case bigger is better.

who are you? and why do you keep calling me shirley?

I'm sorry. Is your name not Shirley?

True, thats what we have running on one of our vehicles, 1/2 hardline to the regulator. However it has over 800ft #s of tork, and has a pump that flows over 7x that which the walbro claims..

How about this fuel pump? http://store.summitracing.com/partdetail.a...mp;autoview=sku



It comes with 3/8 NPT fittings with 1/2" nipples. Convenience. But will it flow enough volume to support a 23A with two Weber IDAs and peripheral ports?

i notice all the factory road race cars will have like 3 of those.



http://rotarynews.com/comment/reply/140



cant find pics! but its got a pre pump and filter, surge tank and then 2 more of those carter pumps. its all in the rear hatch area.



its overkill but its also 1 12a....

That's some serious overkill! Maybe two of these pumps; each one plumbed to a fitting at the bottom of the fuel cell, then Y into a single 1/2" hardline up to the regulator. Then Y back apart to each carb. Sound good?