Fuel pump-fuel system decisions
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Fuel pump-fuel system decisions
I have to make a decision on a fuel system for my build, 69 Nova, carbed, 600hp for now, pump gas. I was planning to keep it simple with a mechanical pump, 1/2" feed line off of a stock tank with a sump added. Looking at the pumps from Clay Smith and Pro-cam but neither are currently available. Looking around some more I see surge tanks, front mounted surge tanks with electric pumps, and some really nice looking in tank electric pumps-lots of options out there! I'd like something dependable and somewhat simple. Talking with Pro-cam they recommended a 5/8 feed line and a return style regulator with their mechanical pump if using pump gas. Clay Smith recommended their low pressure pump with a dead head regulator. Any suggestions or recommendations would be appreciated
https://www.claysmithcams.com/ppf-11-1- ... fuel-pump/
http://www.bakerengineeringinc.com/Part ... -Cam-Parts
https://www.claysmithcams.com/ppf-11-1- ... fuel-pump/
http://www.bakerengineeringinc.com/Part ... -Cam-Parts
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Re: Fuel pump-fuel system decisions
I've been using holley efi pumps & billet bypass reg to drop down to carb pressure for that sort of setup lately.
Works good & not affected by acceleration due to higher line pressure.
Works good & not affected by acceleration due to higher line pressure.
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Re: Fuel pump-fuel system decisions
Xceldyne has both cast and billet pumps in std. and higher pressures.
Tom
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Re: Fuel pump-fuel system decisions
What size feed and return lines?KnightEngines wrote: ↑Tue Jul 27, 2021 2:22 am I've been using holley efi pumps & billet bypass reg to drop down to carb pressure for that sort of setup lately.
Works good & not affected by acceleration due to higher line pressure.
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Re: Fuel pump-fuel system decisions
Dash 8 pressure line, dash 10 return (lower pressure).Bob Hollinshead wrote: ↑Tue Jul 27, 2021 6:38 amWhat size feed and return lines?KnightEngines wrote: ↑Tue Jul 27, 2021 2:22 am I've been using holley efi pumps & billet bypass reg to drop down to carb pressure for that sort of setup lately.
Works good & not affected by acceleration due to higher line pressure.
Re: Fuel pump-fuel system decisions
I would certainly use a bypass regulator. Electric pump would be my preferred route personally. 600 should be easy to support, I used a magnaflow on my 900 roush Yates motor that was street driven and it kept up fine. The magnaflow wasn’t crazy loud either. I had sumped the stock tank on my fox body for it. -12 tank to pump and -10 from pump to front -8 back to tank. It had a single dominator carb.
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Re: Fuel pump-fuel system decisions
Robbmc mechanical pump, american made, if his 550hp capable unit isnt enough he redoes it to the 1000hp unit for half the cost of a new one..
One stop fuel system shop.
https://www.robbmcperformance.com/
One stop fuel system shop.
https://www.robbmcperformance.com/
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Re: Fuel pump-fuel system decisions
His surge tank systems look like an easy route too.54chevkiwi wrote: ↑Tue Jul 27, 2021 2:11 pm Robbmc mechanical pump, american made, if his 550hp capable unit isnt enough he redoes it to the 1000hp unit for half the cost of a new one..
One stop fuel system shop.
https://www.robbmcperformance.com/
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Re: Fuel pump-fuel system decisions
Had never heard of those guys but they have nice looking stuff and it’s reasonable price wise.
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Re: Fuel pump-fuel system decisions
An EFI pump, regulated at the carb, could probably get by with a 1/8ID pipe
Re: Fuel pump-fuel system decisions
I checked out that site years ago, their mech pump looked good but I didn't need that much pump. Also rem looking at their surge tanks, can't rem why I didn't wanna go with one, think they may have been higher priced or it wasn't clear if they'd work with a carb back when I was looking into one. But the prices seem fair on the surge tanks, might give one a try on my 77 vette should be making a bit more this time around and idk if the current setup will work.54chevkiwi wrote: ↑Tue Jul 27, 2021 2:11 pm Robbmc mechanical pump, american made, if his 550hp capable unit isnt enough he redoes it to the 1000hp unit for half the cost of a new one..
One stop fuel system shop.
https://www.robbmcperformance.com/
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Re: Fuel pump-fuel system decisions
I've been leaning towards getting a surge tank and feeding it with a basic mechanical pump. Put a sump in the stock tank and a return line. Easy install, easy access to the electric fuel pump. It would feed all the power I'll ever make. And I think with a couple of manual valves and a little extra plumbing I could run just off the mechanical on the street and use the surge tank setup only when needed. Am I outa my mind? LOL
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Re: Fuel pump-fuel system decisions
Bob,Bob Hollinshead wrote: ↑Sat Jul 31, 2021 11:42 am I've been leaning towards getting a surge tank and feeding it with a basic mechanical pump. Put a sump in the stock tank and a return line. Easy install, easy access to the electric fuel pump. It would feed all the power I'll ever make. And I think with a couple of manual valves and a little extra plumbing I could run just off the mechanical on the street and use the surge tank setup only when needed. Am I outa my mind? LOL
on my street/strip deal-
-10 from rear fuel cell (15 gal )
to a 200gph Holley mechanical fuel pump with composite pushrod
-8 to fuel log on carb
Holley bypass reg on firewall and -8 back to tank
my sbc stuff is around 500 ish and have turned 7500-7600 rpm
lots of street miles and hundreds of passes over 7 years.
no hot fuel issues,i run a auto meter fuel pressure gauge in car and never seen a problem
i am in process of building a new short block to be dynoed hopefully 550 plus and will be using same setup.
the holley pump is expensive but i think it is a nice piece,cost me double in Australia to what USA pays
steve c
"Pretty don't make power"
"Pretty don't make power"
Re: Fuel pump-fuel system decisions
Here is a video of a test on the dyno of my motor with the Robbmc 550 pump. Never dropped below 6 psi feeding a 800 Qjet making 586 hp
https://youtu.be/nw-_zqkjL6Y
https://youtu.be/nw-_zqkjL6Y
Scott
Re: Fuel pump-fuel system decisions
Twin Carter P4070 72 gph ff electrics Twin 3/8" tank pick ups. twin ⅜" fuel lines. 2 common in line paper element fuel filters. No regulator needed.
More than enough supply volume and delivery capability under drag car acceleration forces.
More than enough supply volume and delivery capability under drag car acceleration forces.