Starting to do the tuning on my 67 Barracuda 383 to get optimum mileage. I use the car as a daily driver for 78 mile round trip & ocassional track use. I am going to get the best mileage out of this car as I can but I am not going to hurt its strip performance, trying to improve it as well.
Right now the car runs 12.88 @ 107.9 1/4 mi & gets an average of 11.8 mpg. I am shooting for 11.9 1/4 mi & 14 mpg.
The car is currently equipped with a 383, 75cc Edelbrock heads, XE274 Comp cam, Mallory Dual Point, Edelbrock RPM intake, Holley 850 DP, 1.875 Hooker fenderwell headers, mechanical fan, 727 w/stock style converter, 4.10 SG 8 3/4" & 28" tires.
I am about to pull the dual point, non-vacuum advance & replace it with a Uni-lite w/vacuum advance. That should help get the timing up on the highway & help with mileage.
Found an interesting thing after taking it to the track, I had bolted up a 850 DP in place of my 670 VS & I really liked the throttle response on the way home. I decide to try it for a few days to see how much it killed my mileage but it actually got around 1.5 mpg better.
Right now I've got the timing set @:
17* @ 750 rpm
39* @ 3000 rpm
I'm planning on dropping in the vacuum advance distributor & setting it @:
15* @ 750 rpm
35* @ 2800 rpm
50* @ cruise w/vacuum adv. added
