02-26-2020, 06:36 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by lnfletcher
I run the TKO600 with the 0.64 OD with 3.50 gears, cruises 70 at about 1900 and my 427w gets about 15 on the interstate. The torque of the 427 works great with this combo. IMO.
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In contrast, I have the TKO with the 0.64OD and, with my FE stroked and bored to 447 cubic inches, solid flat tappet cam with 245/245 degrees at .050 and 96 degrees of overlap, a Holley 750 vac secondary, when I have her tuned to absolute perfection I get 10.5 mpg around town and a little highway, with no aggressive acceleration, and maybe 13 mpg on the highway alone -- and that's with the secondaries never opening. And when I say tuned to perfection, I mean tuned to perfection.  The only way I could ever get 15mpg is if I was driving down hill off a mountain. |
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