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Tony Curcio · 01-14-2010, 06:22 PM

The Q-Jet secondary blades protrude down .75" from the bottom of the base, so the spacer/restrictor needs to be at least that tall.

Holley 4150 rated at 500 cfm has 1.50' diameter throttle bores- all four.
A 600 cfm model is 1 9/16".

Holley makes an adapter intended to mount a Q-Jet or Thermo Quad on a manifold designed for Holley 4150 or 4160 (PN 17-6).

Maybe a 4 hole gasket underneath this adaptor is all that's needed for this test.

01-14-2010, 06:22 PM	#1
Tony Curcio Member Join Date: Mar 2002 Location: West Chester, PA Posts: 271 Likes: 1 Liked 4 Times in 1 Post	Re: Pick basics of new eliminator The Q-Jet secondary blades protrude down .75" from the bottom of the base, so the spacer/restrictor needs to be at least that tall. Holley 4150 rated at 500 cfm has 1.50' diameter throttle bores- all four. A 600 cfm model is 1 9/16". Holley makes an adapter intended to mount a Q-Jet or Thermo Quad on a manifold designed for Holley 4150 or 4160 (PN 17-6). Maybe a 4 hole gasket underneath this adaptor is all that's needed for this test. __________________ Tony Curcio 1860 STK