i was wondering what kind of gas milage people were getting with a certain size cam ive got a 2000 ta with m6 and 410's. i was thinking about going with a either a 224/224, 224/228, or a 228/228 and on a112 lsa what kinda gas milage would i be looking at with those cams.

 

I am having 9" (w/410's) and a 238/244 114 lsa put on my 99 Ws6 (m6) as we speak. Guy at the shop told me that i should expect 15-20% decrease in gas mileage. I figure the effect would be significantly less with your realitively mild cam. It will also depend on whether or not your tuned. If untuned, the car may run rich which would obviously decrease your mileage.

 

i just ran an 800mile trip with my cammed ls1

stock gears and not the greatest part throttle tune, and i knocked down 24mpg both directions.

that was going 75-85mph with quite a bit of traffic (speed fluctuated alot), and the return trip was with the ttops off (which i've seen cut 1mpg off the average).

you should still be in mid 20s with the 410s and any of those cams.

 

i was runnin a 224/231 untuned and i got 21.5 driving into a headwind. the way home should have been even better, but the alternator decided it didnt want to make it back home

 

My other motor had a 224/224, M6, and 4:33s in the back. In town driving really depends on your shifting. The cam tends to make the car jerk at lower RPMs, but could hold 4th in town around 35mph no problem. Got about 13-15 depending on how I drove.

Never drove the car on the interstate much so not sure there.

 

it'll be a slight decrease but as long as your not on it alot in the city it shouldnt be that much less.

 

20mpg overall with a mix of highway and city driving. The tune really sucks though. I'm waiting to get my heads on and then get it tuned right.

 

With my "fat" gto and the TR224 112 LSA and a pretty good tune I get on avg 20 MPG, with city being about 18 and hwy about 27

 

Lets see now average 22+- mpg on a high performance car pulling between 360-425 RWHP sounds pretty good to me. If your looking for good gas mileage don't spend thousands making horespower buy a Prius......

 

I'm cam/exhaust only and averaged 22.5 mpg on a highway trip ... I'm running a bit rich and I **** around sometimes though so that doesn't help :o

 

Check my sig as I have most of the equipment you're reffering to as well as a dyno graph in there somewhere. I get 24 mpg on the highway and a combined 18 city/highway. Now you do realize that your right foot does gain weight with these mods. That's when you drop down to 10 or less mpg, but it's fun for sure.

 

I use to be about 19 city/28 highway, now I'm about 12 city with a great tune and a 226/226 112 cam. I may have thought a little different on my cam selection and route to horsepower had I known how bad the mileage would be.

 

I have got 22 - 23 running from Grand Rapids to Cleveland. I was running 80 in 6th from here to Toledo, and 70 in 5th from there to Cleveland. On the road course at Grattan last fall I got 5 mpg. Your fun factor will dictate gas mileage more than part selection will.

 

im running a 228/228 113 lsa and i get 240 miles on the full tank. thats about 15 mpg, but i also enjoy driving my car everyday spiritedly. i've gotten up to 22 mpg on long road trips from the bay area to sacramento.

 

I don't know what mine is but it's safe to say that it is not good. Around town I think I'm getting about 150 miles per tank. So maybe 10 mpg.

 

I ave 20 mpg city/highway. More with mostly highway driving.

 

In VA, you will get better milage than I do here in New England. I got great milage when I went to VA Beach for a vacation. Don't remember exactly what it was.

 

With a 232/236 373 M6 and a fat tune, I'm getting 24/15.

 

you m6 guys **** me off.....my car with just bolt ons a ss3600 and 3.73 the best i can get in town is 17...grrr

 

Yeah, but we're quicker...

lol...

In all seriousness, my gas mileage sucks.