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Best LT-1 Carb?

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Old Feb 21, 2018 | 11:41 AM
  #21  
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Originally Posted by MelWff
you do realize the 4479 is a double pumper while the original carb you have is vaccuum secondary?
why didnt you just rebuilt the original carb?
Because I don't have the original carb. If I can find one, I'll buy it and put it in the box with the heads and exhaust manifolds. The carb on the car right now is a double pumper with mechanical secondaries but only 600CFM and it leaks. A brand new double pumper with mechanical secondaries and 750 CFM should work well. We'll know in a week's time.
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Old Feb 21, 2018 | 11:47 AM
  #22  
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Originally Posted by Barry's70LT1
I've had a R4779 DP on my LT-1 for about 45 years now. It continues to work great. I have made a few tweaks to improve the original configuration.
There is over 100,000 miles on that carb now, with only a few gasket changes over the years.
Very good to hear. Thanks
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Old Feb 21, 2018 | 07:55 PM
  #23  
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You will need every bit of that 750 with that cam and Brodix heads......it should work great!

Jebby
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Old Feb 22, 2018 | 10:32 AM
  #24  
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600 is a bit weak for a performance engine. minimum 650 would be my suggestion.

Last edited by 69Vett; Feb 22, 2018 at 10:35 AM.
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