alky carb problem

Old 09-20-2009, 10:23 AM
  #1  
bwooten71
Junior Member
SHOW GUEST
Thread Starter
 
Join Date: Jan 2008
Posts: 3
Default alky carb problem

I have a problem with my carb.I have a 477 bbc with 13.1 comp,278-286 solid roller with bb2 heads,and a George ruppert 1050 alky dominator,with a magnafuel 500 fuel pump.Car runs [email protected]
The carb came with 174 jets.George told me "do not go any bigger than 177.My problem is that my car lays over on top, and after the 1/4 mile and letting off the throttle and crusing to the end the car wants to shut off,i have to pump the throttle alot to get it running againit sounds like the bowls are drained.also, i now have 200 jets in the carb and my egts are 1249, i started at 174s and went up from there.
Do i need to put the 177 back in with smaller air bleeds?would that get my egts where they should be?
bwooten71 is offline  
Old 09-20-2009, 12:11 PM
  #2  
curtisreed
Senior Member
RACING JUNKIE
 
curtisreed's Avatar
 
Join Date: Feb 2004
Location: KIEFER, OK.
Posts: 1,312
Default

If you are really having the fuel bowls empty on the top end then I can tell you that bigger jets will just make the problem worse. You need to work on fuel delivery if that really is your problem.

Curtis
curtisreed is offline  
Old 09-20-2009, 03:13 PM
  #3  
shawnp
Senior Member
RACING JUNKIE
 
Join Date: Mar 2003
Location: Ohio
Posts: 937
Default

You have to keep fuel to the carb to determine if you have a carb problem. It sounds like a fuel pump/psi issue, not in the carb.
shawnp is offline  
Old 09-20-2009, 03:14 PM
  #4  
hammertime
Senior Member
RACING JUNKIE
 
Join Date: May 2003
Location: Coldwater, MI
Posts: 2,998
Default

Originally Posted by shawnp
You have to keep fuel to the carb to determine if you have a carb problem. It sounds like a fuel pump/psi issue, not in the carb.

x2 ... had same issue back when I first started with alky .. upgraded my fuel pump and problem gone
hammertime is offline  
Old 09-20-2009, 05:28 PM
  #5  
bwooten71
Junior Member
SHOW GUEST
Thread Starter
 
Join Date: Jan 2008
Posts: 3
Default

my pump is a brand new magnafuel 500.i just checked flow, i pulled lines off carb and put them in a 5gal can;the pump filled 5gal can in 51 seconds.i have plenty of vol and pressure.at the end of my runs the gage reads 7.5psi.
bwooten71 is offline  
Old 09-20-2009, 05:59 PM
  #6  
OneBadGMC
Senior Member
RACING JUNKIE
 
Join Date: Sep 2007
Location: Belleville, IL
Posts: 658
Default

Originally Posted by bwooten71
my pump is a brand new magnafuel 500.i just checked flow, i pulled lines off carb and put them in a 5gal can;the pump filled 5gal can in 51 seconds.i have plenty of vol and pressure.at the end of my runs the gage reads 7.5psi.
What size needle and seat?
OneBadGMC is offline  
Old 09-20-2009, 08:07 PM
  #7  
bbchevy
Senior Member
RACING JUNKIE
 
Join Date: Mar 2003
Location: Fountain,MICHIGAN
Posts: 856
Default Alky ?

Sounds to me like you have a AIR Leak>?
Intake gasket?
A Hole that the Fuel can keep up with,would also make sence whys it Dies on the Other End,Hard Starting,ETC....?
Later
G 8)
bbchevy is offline  
Old 09-21-2009, 06:46 AM
  #8  
3758
Junior Member
APPRENTICE
 
Join Date: Aug 2003
Posts: 15
Default alky carb

with alky egts should be around 105o to 1150 pressure on alky with rupert carb should be around 10 psi you really need a belt driven pump makes all the differance in the world.
3758 is offline  
Old 09-21-2009, 03:03 PM
  #9  
shawnp
Senior Member
RACING JUNKIE
 
Join Date: Mar 2003
Location: Ohio
Posts: 937
Default

Call down and talk to George or Willie. We run belt drive and we are at 3 at idle and I believe when we did the check fof down track it was around 9. George will tell you where to be with your pump.
shawnp is offline  
Old 09-21-2009, 05:06 PM
  #10  
bwooten71
Junior Member
SHOW GUEST
Thread Starter
 
Join Date: Jan 2008
Posts: 3
Default

i dont know what size the seats are,im going to pull them out and check them.i went with magnafuel 500 because george said it would be ok.
thanks for your help guys
bwooten71 is offline  

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -