Cams for 455 engine builds.

[Steve C.]

Link to Lee's Pontiac....

http://www.pontiacstreetperformance....uild45500.html

I'm not positive but I believe Lee's best was 11.46 at 115.4 mph with a 1.53 60 ft.

He later changed to a UltraDyne solid flat tappet cam with 247 degrees duration ground with a 108 lobe separation. I think he ran 11.27 at 119.6 mph after the change. Streetability was similar as I recall.

Information posted by Lee previously....

I ran an UltraDyne 288/296 HFT for many years in my 455. It was on a 108, and my best performance came with shifting it around 5300.

I later replaced it with an UltraDyne 280/280 SFT, also on a 108. It ran best shifting at 5900.

The HFT had MUCH better power off the line, my converter flashed to 32-3300rpm, and I could get 1.53 60' times with 3.42 gears.

The SFT was softer off the line 1.59-.61, but ran 3mph and .2 quicker in the 1/4 mile.
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'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 with old UD 288/296 hydraulic cam] Feb '05 HPP Shootout article



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