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Thread: Fuel pressure for blown sbc?
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07-08-2010 #1
Registered User
- Join Date
- Aug 2004
- Location
- Rustburg, Virginia
- Posts
- 3,436
For a carb...(at idle)needles and seats can't handle more than 6-8psi of fuel pressure before they allow fuel to over flow the bowls and flood the engine with raw gas. EFI is a different animal altogether, as Andrew stated.
1970 RS/SS350 139K on the clock:
89 TPI motor w/ 1pc rear seal coupled to a Viper T56 via Mcleod's modular bellhousing w/ hydraulic T/O bearing from the Viper, 12 bolt rear w/ 3.73 gearing, SC&C upper control arms, factory lowers with Delalums, C5 brakes at all four corners, Front Wheels 17x8's with Sumi 255/40/17 and Rear Wheels 17x9's with Sumi 275/40/17.
Brief description of the work done so far can be found here: http://www.nastyz28.com/forum/showthread.php?t=112454
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07-09-2010 #2
Registered User
- Join Date
- Dec 2008
- Location
- Columbus, IN
- Posts
- 131
John is correct. I run 7 psi base on my blow thru with holley style carb. Connect the small port on top the regulator to your carb hat/bonnet. fuel pressure rises 1:1 with boost.
'66 Mustang
'67 FireBird https://www.pro-touring.com/forum/sh...light=firebird
'68 Barracuda
'69 Mustang Mach 1
'97 Mustang Cobra
'04 Mustang Cobra
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