Thread: Desktop Dyno?

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Originally Posted by chevy 37

Can't help you with the numbers but was just wondering how those dual 390's work on your motor? Thinking of doing the same.

The 390's rock. Please check out my cardomain site, particularly page 2, where I go into length about the tunnel-ram part of the build.

I run them with stock jetting, and literally bolted them on and laid a 50' patch down my father-in-law's driveway ten minutes later. The roller-cam engine, with its quick throttle response, seems to be a good fit for the tunnel-ram -- this is an older 289 "street" tunnel ram -- and the 390's appear to be an ideal size for a small-block. It runs a little rich and idles a little quick to get a good scary lope out of the cam, but it runs nice.

EDIT: They are Holleys, though. If I could do it again, I'd buy Edelbrock 1403's and save myself a couple hundred dollars in Excedrin.