Fuel system for 383

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Fuel system for 383

Postby Johns10 » Wed Aug 09, 2017 9:32 am

Going to be doing my fuel system here in the next week and have a few questions. I'm building a 383 estimated to be around 450 hp. Read several topics on using the stock pump. I had a 2.8 in a 91. Does the stock pump have enough flow for 450 hp. If not I'm looking at getting a carter pump I've read on another topic. What are you guys doing for a pick up on external pumps. On the pump I'm looking at it has 3/8 input and output. Would i need to run 3/8 or 1/2 steel lines and 6an or 8an hose/fittings.
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Re: Fuel system for 383

Postby bgblock427 » Wed Aug 09, 2017 11:11 am

How did you come up with the HP number? what carb you running. Most times a 3/8 is plenty.
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Re: Fuel system for 383

Postby Johns10 » Wed Aug 09, 2017 11:30 am

The guy building it has built similar setups and that's what other people have gotten.
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Re: Fuel system for 383

Postby lowblazin94 » Wed Aug 09, 2017 1:15 pm

Stock pump for a 2.8 v6 might not be able to keep up.

Rick has an in tank pump he recommends and run a by-pass regulator.
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Re: Fuel system for 383

Postby XXXXXXXX » Thu Aug 10, 2017 2:18 am

I am running a 20 year old holley red pump.. it keeps 5lbs of pressure even under 7lbs of boost at wot. With that said.... if you go external I would recommend at least a holley blue pump if the engine is really going to make 450 hp.. however that may be a generous hp number by the builder depending on whats been done to the engine combo wise... I ran a 10.25 to 1 350 with 210 afr heads ... a real solid roller (not hydro roller) 580 lift 260/270@.050 etc with 2 holley 600hp carbs on a tunnel ram... 4200lb car ran mid 11's.. on the engine dyno before in car tuning it put out 528hp peak... so a 450hp 383 is going to need a solid fuel supply.. the in tank pump ric recommends should handle way more than a holley blue even.

Take a look at my sig.. you will see my blown 305 made 194 rwhp on the chassis dyno... I hope your 383 is 450hp if that's what you want but engine hp number tend to get a little inflated sometimes.. any way rics in tank pump or a holley blue should handle any of your needs.

X

PS you may want to check out lowblazns combo here viewtopic.php?f=28&t=35137&start=100 and see what type of power he is making and compare that you combo
82 S10 Longbed.. stock 305.. b&m 144 blower.. 7lbs.. stock 801 heads.. dyno'd 194rwhp...holley 750dp.. percys adjust a jet in the front & rear.. headman 1 1/2 shorty headers.. 2 1/4 dual exhaust with hooker aero chambers.. msd with boost timing master.. 2500 stall .. 700r4 .. 3.73 posi fact s10 disc brake rear end.. caltracs.. 275/60/15 Nitto Extreme 555 drag radials
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Re: Fuel system for 383

Postby Rickracer » Thu Aug 10, 2017 10:44 am

If you want simple and reliable, go with a factory replacement for a TBI 4.3 in Carter, Delphi, AC Delco, or a real Walbro, (not knockoff), and use a bypass style regulator. Personally, I've been using a Holley 12-803BP regulator for about 5 year now with ZERO problems. 8)
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Re: Fuel system for 383

Postby Johns10 » Thu Aug 17, 2017 1:00 pm

So stock it is. I'll be rerouting and replacing fuel lines. Will it be ok to use 3/8 line for the return or do I need to stick with 5/16 line.
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Re: Fuel system for 383

Postby Rickracer » Thu Aug 17, 2017 4:39 pm

Bigger is better on return lines, but stock will work fine as well. :thumbup:
Rickracer
ASE Certified Master Automotive Technician (well over 3 decades of experience, :thumbup: )
'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 7.76 in the 1/8th, 12.24@109.27 mph in the 1/4, gonna spray it one of these days... :mrgreen:
76 Chevy Vega Drag Car, TWIN TURBO 355, P/G trans w/ brake and JW 4000 stall vert, 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags. Best time9.669 @ 139.79, Latest video: https://www.youtube.com/watch?v=S59riYn ... ata_player
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Re: Fuel system for 383

Postby Johns10 » Fri Aug 18, 2017 7:36 am

Are you guys just running stock fuel filter as well?
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Re: Fuel system for 383

Postby Rickracer » Fri Aug 18, 2017 8:33 am

Yes, :thumbup:
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ASE Certified Master Automotive Technician (well over 3 decades of experience, :thumbup: )
'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 7.76 in the 1/8th, 12.24@109.27 mph in the 1/4, gonna spray it one of these days... :mrgreen:
76 Chevy Vega Drag Car, TWIN TURBO 355, P/G trans w/ brake and JW 4000 stall vert, 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags. Best time9.669 @ 139.79, Latest video: https://www.youtube.com/watch?v=S59riYn ... ata_player
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