[Steve C.]

Holley Street Dominator intake on a previous pump gas 4.210 stroke 462cid street engine.
This intake was modified by Dave Bisschop.
The port entrance opening was about 2.300" tall, and properly port matched to the cylinder heads in use with some runner blending.
It used my custom HP950 carb.

HSD / no carb spacer:
577.9 hp at 5700 rpm, 581.0 ft.lbs. at 4400 rpm.

HSD / 1/2" open spacer:
589.4 hp at 5600/5700 rpm, 589.0 ft.lbs. at 4600 rpm.

HSD/ 1" open spacer:
589.8 hp at 5700 rpm, 590.8 ft.lbs. at 4400 rpm

Not too shabby considering it has the ability to approach a Victor intake.
With the same engine & carb my Victor intake with 1/2" carb spacer made 600.9 hp at 6000 rpm.

The only testing with the Tomahawk was with my 505 engine with an early camshaft.
This was an original production design Tomahawk introduced by Ken Brewer.
Port work was similar to my Holley Street Dominator intake above..

Here are were three intakes tested with this engine:

Worked Tomahawk intake

w/1-inch open spacer / Holley HP950
630 ft.lbs tq at 4400 rpm
611.6 hp at 5600

Dave Bisschop Holley Street Dominator intake

w/1-inch open spacer / Holley HP950
638 ft.lbs tq at 4400
618.8 hp at 5600 rpm

Victor intake

w/ no spacer / Holley HP950
639 ft.lbs tq at 4600 rpm
641.4 hp at 5900 rpm


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