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down draft vs side draft


tuckfoo

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But wouldn't the twin 38's have ultimately more flow volume than the 32/36? If we could flow bench both manifolds side by side, wouldn't we see more potential flow from the 38's than the 32/36? Ultimately that would be the bottle neck for power. I would also assume that fuel on both would be adjustable and would not be the issue.

Theoretically, you are correct. The twin SU engine could ultimately make more HP, but I feel it comes at a cost.

 

We spent some dyno time playing with this a long time ago, and the engine we used was not a racer, but a good street motor. Yes, both were tuned properly as we were looking for HP, not looking to prove that the DGV was better.

 

Maybe someone should revisit this. Anyone got a dyno and some free time?

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