Fuel and Ignition Fuel Pumps and Systems, Ignition and Spark Systems

Carb LT1 Guys in here please!!

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Old Mar 26, 2008 | 02:33 PM
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Carb LT1 Guys in here please!!

Just wondering. Im getting ready to go to carb. I have a 94 LT1 stroker. Sources have told me that I have to slow down the fuel delievery for the carb becuase the stock fuel system for the LT1 is too much. Would a fuel pressure regulator take care of that so I can run the stock fuel pump?
Thanks
Im doing some planing between carb and efi.
I have been reading alot of post about the subject
Chris
Old Mar 27, 2008 | 01:48 PM
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Anyone?
Old Mar 27, 2008 | 02:57 PM
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I think an adjustable fuel pressure regulator can take care of that.
Old Mar 27, 2008 | 03:19 PM
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Your combo is not very radical, so why go carb?
Old Mar 27, 2008 | 08:35 PM
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Canton I know this is a copp out but Im just being honest. Im just sick and tired of the EFI B.S. Now I know efi is the way to go for some people. But for me, im just tired of one little sensor going bad which could effect the performance of the car. Now staying humble in that respect I'am aware that the Carb is not going to be easy either. But I feel at least I dont have to worry about the opti, and various other sensors. Another aspect that Im looking at is that my car is strickly for the track now. I no longer drive it on a daily basis, So its a race car now. Carb to mee just seems to be a little more simplyfied to me. As far as trans I have a good buddy of mine that is going to let me use his 9inch Tailshaft Turbo 350, All i need to get is the kit from BMR to mount the trans up. Since I have had car I have gone throw 4 4L60E trans. However. This is a race car so it would probably last longer. And I understand that its how you build trans. I guess my experience has not benifited from that. So I hope this helps. Please give me your imput on this subject.
Chris
Old Mar 30, 2008 | 07:01 PM
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i think the difference in pressure is really taxing a regulator to its limits, but i could be wrong. have you considered just running an inline electric fuel pump to the fuel rails?
Old Apr 2, 2008 | 12:07 PM
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Electric fuel pump to rails? Would that slow down the pressure? A good buddy of mine said that I should be able to run a regulator, and then bypass the return line so that the fuel slows down or something like that LOL
Chris
Old Apr 12, 2008 | 03:26 AM
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bump
Old Apr 12, 2008 | 03:29 AM
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Ttt
Old Apr 12, 2008 | 10:42 AM
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To do it right, you need a low pressure electric fuel pump, and a regulator. It doesn't have to be a "bypass" type regulator, as long as the fuel pump isn't grossly oversized. But trying to throttle down a high pressure fuel injection pump to work with a carb is not the way to go. Low pressure pumps are cheap. Here's an example:

http://www.holley.com/12-802-1.asp

Please do not bump/ttt three minutes apart.
Old Apr 12, 2008 | 02:24 PM
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Upgrade your fuel pump, regulator, filter and lines, For your engine I'd run -10 lines at least a 250gph pump low pressure pump.
Old Apr 13, 2008 | 03:36 AM
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Cool guys thanks for the information. Im going to look into using that holly pump that injuneer pointed out. Its amazing how carb DO NOT use that much fuel.
Chris
Old Apr 14, 2008 | 11:59 AM
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Originally Posted by tomcowle
Upgrade your fuel pump, regulator, filter and lines, For your engine I'd run -10 lines at least a 250gph pump low pressure pump.
Hopefully, you meant 250 lph pump.

Originally Posted by LT1CST
Cool guys thanks for the information. Im going to look into using that holly pump that injuneer pointed out. Its amazing how carb DO NOT use that much fuel.
Chris
They use just as much fuel per HP (brake specific fuel consumption), if not more than a fuel injected setup. They just need it at a much lower pressure.
Old Apr 14, 2008 | 11:28 PM
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I just saw a "Q&A" in the current issue of Hot Rod magazine with regard to running an EFI high pressure pump with a carb. Look at page 135 of the June 2008 issue. They show a high pressure pump feeding a "tee", with a Kinsler bypass valve set at 8psi allowing fuel to return back to the tank from one branch of the tee, and the other branch of the tee feeding a Holley PN 12-803 regulator (non-bypass) set at 6.5-7psi, with dual feeds out of the regulator to the carb.
Old Apr 15, 2008 | 01:00 AM
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Sweet Ill check it out Thanks
Chris



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