600 CFM, all I need. Check my math!

7milesout said

I'm listening / learning. Seems like the website I used yesterday for the trap speed is snarffled up. I put the same info in a couple other ET / hp / trap speed calculators and it's saying more like 96 or 97 mph trap speed with a 13.99 sec ET. And at 96-97 mph, the engine would be turning 4,800 - 4,850 rpm.

Either way, based on what I'm reading, I'm going to get the exhaust straightened out, and then tune the 750 edelbrock based on what I see on the wideband, which sounds like fun. Once I get it dialed in, I'll take it back to the strip and see what it does.

Thanks for the info.


7milesout

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That's the way to do it. You have to learn for yourself. I will tell you what I tell everyone. That is this: do not waste your time with ANY vacuum secondary Holley. I can't tell you how many hors I have wasted first testing them and second, replacing them. Most people don't realize that most of the time the secondaries NEVER even open. I've see 480 CID Chevys on the dyno with 3310 hollers on them and the secondaries didn't open until 6000.

Work with what you have and make it right. It will run well. If you decide down the road to go to a Holley, skip all the nonsense and buy a mechanical secondary carb and don't waste your time.

I lovingly call those vacuum secondary Holley carbs boat anchors.