750 holley carb problem!
Moderator: John_Heard
750 holley carb problem!
Went to start engine, turned fuel pump on and fuel went to running out of vent tube? Feul pressure is at 8lbs was running fine Sunday when I started car, Is float stuck or power valve busted ? Any HELP would be greatly appreacated!
- BracketNova
- Posts: 618
- Joined: Sat Apr 25, 2009 6:46 pm
- Contact:
Re: 750 holley carb problem!
My money is on the float. Do you have fuel filters in your system? A tiny spec of anything on the needle will cause what you are describing...ask me how I know
"I always compare drag racing to lighting $100 bills on fire, only it's more expensive." - Craig W.
Check out my website...
http://www.findmoneyraces.com
'71 Nova E85
6.69 @ 100.2 MPH 9/6/14
1.4257 60'
1700' DA
13:1 439 BBC
3330 lbs
Check out my website...
http://www.findmoneyraces.com
'71 Nova E85
6.69 @ 100.2 MPH 9/6/14
1.4257 60'
1700' DA
13:1 439 BBC
3330 lbs
Re: 750 holley carb problem!
Floats and needle valves will sometimes stick if it's been sitting for awhile. Rap on the float bowls with a screwdriver handle - that will sometimes free them up. As a last resort you'll need to pull the flow bowls to check the needle valves are freed up.
1969 ProStreet Camaro RS Best 9.75@139 1.46 60'
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline
http://www.marsh-racing.com/harrys_camaro-1.htm
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline
http://www.marsh-racing.com/harrys_camaro-1.htm
- jmarkaudio
- Posts: 278
- Joined: Fri Oct 26, 2007 4:22 pm
- Location: Florida
Re: 750 holley carb problem!
Few things, stuck N&S or trash hanging it open, float absorbing fuel, and occasionally the o-ring on the N&S will leak, but usually not enough to cause that issue. Also, no reason to use that much fuel pressure in a gas carb, my race engine is set to 6 psi.
Mark Whitener
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Good work isn't cheap and cheap work can't be good.
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Good work isn't cheap and cheap work can't be good.
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