MPG

[smalblock]

Our 68 camaro convertible averaged 18.19 MPG while on the HRPT. It has a 9.0 to 1 350, 500 cfm edlebrock, 3:31 rear gears with 2004R transmission. We were pulling a small motorcycle type cargo trailer. According to the mile post, the odometer is accurate. I went to .003" larger metering rods for a lean reading on the plugs. I'm dissapointed the mileage is not better. I do still have points and don't know if this hurts or not.

[tunaboat]

sometime overdrive trans and to much cam can kill gas mileage,big cams need gear and rpm to get mileage!

[smalblock]

I have a RV cam in the camaro. It appears MPG is like performance........some cars are born fast and some get good mileage. It takes a good combination to have either one, and mine does not have it.

[RAIV70Judge]

I run a b+m th350, with a 2800 stall, a somewhat large cam, Holley 750 w/manual secondaries, and this year I ran a 3:55 gear with the tires being 265/60/15

[BLUE STREAK]

296

[redragtop]

296

Is this your countdown Ken ???

[BLUE STREAK]

Is this your countdown Ken ???

SOME DAYS THE BRAIN IS STUCK IN NETURAL!! Today is one of them, sorry about that. Maybe I should just read the post and leave it alone!!!

[1931s/x]

i was just hoping to break 20 mpg with my duster. im pretty close. i dont think 19 was all that great but it mad eme feel pretty good to talk to a guy in cocoa with a chevelle that had some kind of ls engine and a kiesler trans, he was proud to have gotten 20-21.
my 400 is a smog era engine with real low compression, some have doen the math and say as low as 7.8:1, they were rated a little higher, i re ringed it before i put it in. they have huge heavy pistons, im thinking 9.5:1 and a nice light piston should help. i was also on the lean side on my trip, but it ran great. i fattened up the jet and just took it on a 200 mile trip that was all hills and mountains and i got 18. im not sure if being lean even helped.
the nice thing with the od vs just going with a highway gear, you have the best of both worlds, you still have power out of the hole.

[Phoneguy]

Wow feel like a gas hog. I got 12mpg no matter how I drove it, but I proably could have done better on the interstate if I actually ran the speed limit. 80 plus with 3.73's, overdrive, and short tires I was turning around 2800. Funny thing is on the way back I blew past a ton of prius's. My buddy started pointing out the look on there faces when a loud car goes blowing past them, priceless.

[383S-10]

Hey Robert I wonder why you didnt run the speed limit.......lol............

[cobra]

don't know my mpg. i was more concern about making it home. i made it.

[4dfide]

22-23 is what i ended up getting and was very pleased with that

[ogre]

i set my 58 up for cruising the highway. 350 ramjet, 700r4 and 3.27 gear. i averaged 20.1 mpg using cruise and with the ac on. these 55-59 chevy trucks are like driving a brick down the road. the PT was my first big trip, i only had ~500 miles on it since getting it on the road. i was going to be happy with anything over 15 mpg, 20 mpg had me grinning big time.

[oletrux4evr]

I was pleasantly surprised.....383, 5-speed, 3:73 gears......2000 RPM @ 70, averaged 18.8 on the highway. Got 6 in the parking lots.

[Eliteman76]

Bah. I would say I concerned about MPH last year...but I was averaging 15mpg with the 3.50's out back with the top loader and 1:1 4th gear. At 3800 RPM for around 3800 miles. OK, so, at 3800, we didn't get 15mpg. I was getting like 200 miles on 16-18 gallons of gas.


This year, I did 2.75's out back...and at speed the GTS was soo much smoother and fun to drive at speed.
Yes, I miss burnouts through second gear...but it's nice to not strain the engine and get passed by a freaking prius on the interstate.

Personally..I want a new 6.2l Mod V8 with a t-56 sitting in a crownvic PI chassis running EFI under the torino.