V6 ??
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Here's a little more 'real world' comparison:
We own two F-bodies, one is a LS1 and the other is a V6 (both '99). I'm getting roughly 250 miles with a tank (14gal) with the LS1 and 280 miles with the V6, both city driving with auto trans .... 18mpg and 20mpg ... not worth giving up two cylinders imo.... on the highway the LS1 is good for 24mpg (70mph on cruise control). The V6 simply sux...
We own two F-bodies, one is a LS1 and the other is a V6 (both '99). I'm getting roughly 250 miles with a tank (14gal) with the LS1 and 280 miles with the V6, both city driving with auto trans .... 18mpg and 20mpg ... not worth giving up two cylinders imo.... on the highway the LS1 is good for 24mpg (70mph on cruise control). The V6 simply sux...
Drifting
Joined: Apr 2007
Posts: 1,892
Likes: 3
From: Springfield Illinois
What cam where ya running?
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
327, 186 ported heads, Hooker headers, 10 to 1 comp. 350 HP GM hydraulic cam "151" Nice, low maintainance streetable setup. The mileage will drop in a hurry if you kick in the outboard carbs though.
Last edited by 63mako; Jul 21, 2007 at 12:34 AM.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
You know, GM built a lame V8 back in the 70's which displaced about the same as a six. It was a 262 cu in small block. With a decent set of heads and a 2 barrel, it could be pretty efficient and still looked the part when you opened the hood. With an overdrive transmission and not-too-wide tires, you could have the closest thing to an economy Vette. (But it still would not get as good a mileage as a stock C5)
Melting Slicks
Joined: Sep 2004
Posts: 2,412
Likes: 3
It also depends on the kind of driving that you will be doing. I will get around 8mpg with my stroker engine in the city, but on the highway in 6th gear I'm getting 20+mpg. So if you're only driving this car in the city, an OD will make little to no difference. But on the highway, it could make all the difference.
Drifting
Joined: Jun 2005
Posts: 1,950
Likes: 498
From: Chino Hills CA
I have a'68 Chevy Van I've had for 25+ years. It originally had a 230 cu in in line six and a three on the tree. I could get over 20 mpg in normal driving. About 8 or 9 years ago I built a 350 cu in small block with cam, some porting, intake, headers, etc., and now I just can't get real good gas mileage. I can't figure out why...
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
I have a'68 Chevy Van I've had for 25+ years. It originally had a 230 cu in in line six and a three on the tree. I could get over 20 mpg in normal driving. About 8 or 9 years ago I built a 350 cu in small block with cam, some porting, intake, headers, etc., and now I just can't get real good gas mileage. I can't figure out why...
