My 505 at peak power rpm the Tomahawk intake without a carb spacer was down 4.8 horsepower compared to a 1-inch open carb spacer.
At peak torque rpm the Tomahawk intake was down 5.9 ft.lbs. torque without the carb spacer.
4.210" stroke / 462
Holley Street Dominator intake with runner & plenum work by Dave Bischop
No carb spacer:
577.9 hp at 5700 rpm, 581.0 ft.lbs. at 4400 rpm.
With 1/2" open spacer:
589.4 hp at 5600 rpm, 589.0 ft.lbs. at 4600 rpm.
With 1" open spacer:
589.8 hp at 5700 rpm, 590.8 ft.lbs. at 4400 rpm
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
Last edited by Steve C.; 07-25-2021 at 04:41 PM.
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