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Originally Posted by ta man

That seems high..My 290 KRE SD's only flowed 203 cfm before at .500...I wonder when they stated 260/220 cfm in the magazine that was at .550....? Makes more sense? I never fully trust magazine articles..especially when they are pushing new products.

Along those lines year ago Muscle Car Review had an article on a 455 SD my old machinist built. He had a very conservative dyno but cars "ran the numbers". Used an UD cam. Well the dyno numbers were too low it was taken to another shop for dynoing again(on the east coast so not Westech) and since Comp advertized in the magazine it became a Comp cam and not a Ultradyne.

Lots of articles about motors dynoed at Westech taken to the track that do not run the numbers.


I think Roger Bolinger in Germany has the Tribal tubes on his Butler road race motor.

I can tell you my Hedman step 1 3/4-1 7/8 lost HP on a friend's 462 roller motor SD Perf ported E heads that made 640 HP and runs mid 10s compared t the 2" headers.

I plan on dynoing my 0.060 455 ported round port E heads Stump Puller cam motor with the Tribals, my step Hedman's, and my Hooker 2" this spring. So more info then. Just got an associate so I might can have a day off for dynoing it now! Last year just me and working my butt off.