EFI pump regulated to carb?

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77cruiser
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Re: EFI pump regulated to carb?

Post by 77cruiser » Mon Sep 11, 2017 11:08 am

Tested the flow, 1.5 gal. per minute. Is that enough?
Jim

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Re: EFI pump regulated to carb?

Post by joe 90 » Mon Sep 11, 2017 4:41 pm

340 litres / hour.

Enough for 800 HP or a bit more?

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Re: EFI pump regulated to carb?

Post by carmakerevive » Mon Sep 11, 2017 8:14 pm

340 is more than enough.

Hopefully no cavitation occurs.
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Re: EFI pump regulated to carb?

Post by 77cruiser » Mon Sep 11, 2017 8:25 pm

Pump is rated at 320 but at 43 lbs. press. I'd guess.
Jim

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Re: EFI pump regulated to carb?

Post by vortecpro » Mon Sep 11, 2017 8:47 pm

77cruiser wrote:Tested the flow, 1.5 gal. per minute. Is that enough?
On my QJ I had about 3/10 of a gallon in 11 sec, I had problems but it was due to fuel pressure forward out of the pump, stalled fuel in the line on launch. My new fuel system 5/10 of a gallon in 11 sec, but a solid 12 psi forward at that flow, problem solved.
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Re: EFI pump regulated to carb?

Post by cjperformance » Mon Sep 11, 2017 8:54 pm

vortecpro wrote:
77cruiser wrote:Tested the flow, 1.5 gal. per minute. Is that enough?
On my QJ I had about 3/10 of a gallon in 11 sec, I had problems but it was due to fuel pressure forward out of the pump, stalled fuel in the line on launch. My new fuel system 5/10 of a gallon in 11 sec, but a solid 12 psi forward at that flow, problem solved.

Yes its often interesting to run a gauge both before and after the reg if running a dead head system. If pressure between reg and carb drops from say 6lb to 4lb just after launch you can bet the pressure before the reg is doing the same due to launch g.
Craig.

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Re: EFI pump regulated to carb?

Post by vortecpro » Mon Sep 11, 2017 9:02 pm

If you run a QJ on a car that leaves.....you better have a good fuel system.
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Re: EFI pump regulated to carb?

Post by 77cruiser » Mon Sep 11, 2017 9:39 pm

Unlikely I'll see better than high 1.6's It was 1.72 last week.
Jim

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