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I think I have made up my mind on what I want to do. I wanted to get a little advice from you guys. I have a 408ci 13.1 aluminum headed SBC in my race car. I think I want to run the motor on alky and run a second fuel sys. With 112 or something to run the nitrous side. Any ideas on what size carb ill need and how much will I gain from alky? I live in texas and it is 100+ down here when we race...
 

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I went a tenth faster with an alky dominator than the gas dominator, and the gas carb was tuned on a chassis dyno, the alky was a Rupert we had built back in the 70's for a totally different type of combo.

Fuel pressure won't change, but you will be able to run more timing. - I don't race sbc's, so can't help you there. Talk to Rupert or one of the good alky carb places and get one from them.
 
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