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Pampered-Z · 09-22-2006, 07:10 PM

As Ian stated, big HP and mileage don't go together. BUT, with 3:42s, the right convertor and you should be able to get at least close to your HP and mile goals.

I think a 383 with a something like the 305 cam, 2800-3000 stall convertor, and 3:42 gears should get about 12-14 MPG.

On my old N/A motor I went from 3:23 to 3:42 and noticed only minor gas mileage change, but when I went to 3:73 I did notice far less miles per tank.

I haven't done allot of easy cruising with my 383/blower, but I can tell you that under boost it uses allot of fuel!

09-22-2006, 07:10 PM	#9
Pampered-Z Sliderule / Moderator Join Date: Oct 2004 Location: Catawissa PA Posts: 2,294 iTrader: (1)	As Ian stated, big HP and mileage don't go together. BUT, with 3:42s, the right convertor and you should be able to get at least close to your HP and mile goals. I think a 383 with a something like the 305 cam, 2800-3000 stall convertor, and 3:42 gears should get about 12-14 MPG. On my old N/A motor I went from 3:23 to 3:42 and noticed only minor gas mileage change, but when I went to 3:73 I did notice far less miles per tank. I haven't done allot of easy cruising with my 383/blower, but I can tell you that under boost it uses allot of fuel! __________________ 93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada 1) Build it 2) Race it 3) Break it 4) Repeat!!!