Going Backwards (going to a smaller carb)

[GASoline71]

So I've always used 3310's for most of my HP engine builds. But this is the first 5,000 pound brick on wheels I've ever built an engine for. I built it for top end power like I always have. So I topped it off with a 750cfm 3310 with a rear metering block and a 4 corner idle circuit.

So my carb guy and I were yakkin the other day and now that the engine is out of the truck awaiting the truck to be rebuilt after I hit a ditch 1.5 years ago... he recommended a smaller carb.

So I now have an 1850 main body with center hung float bowls, that has been bench flowed to about 625cfm with the choke horn milled off, rear metering block, and a 4 corner idle circuit. He said that if I don't like it, he will leave my 3310 main body on the shelf in case I want to swap it back.



I think I'm going to end up really liking this smaller carb. Especially in the heavy truck. The transition from low end TQ to top end should be smoother. While the engine is out I'm also thinking about going to a smaller roller cam since I can achieve a lot of the performance I have now with a bit milder roller setup, instead of the aggressive flat tappet that's in there now.

prostreet-C10, cableguy and MarvD, I was thinking of you three when I was talking with my carb guy... what say you? Anybody else wanna chime in with thoughts as well?

Gary