took a 325 mile round trip and got 338 out of a tank

worked out to 22.8 mpg

mods in sig

I am not sure if I am happy with it. I was hoping for higher. but it ran great and no problems.

 

Really good for having a cam!

 

Not too bad I was getting 25-27 on my last trip

 

whats your duration, 25-27 was what I was hoping for

 

Duration Advertised: 268° Intake / 276° Exhaust
Duration @ .050'' Lift: 218° Intake / 224° Exhaust
Valve Lift w/1.6 Rockers: .570'' Intake / .565'' Exhaust
Lobe Separation Angle: 113°

You should get similar milage. Just need to fine tune it.

 

Hmmm, for comparisons sake, my hotcammed car gets 28mpg on the highway going 65, and about 26mpg going 80mph.

I'd think you could squeeze a bit more milage out of that car with some tuning.

 

My car must be in need of a tune up pretty bad. I get like 12mpg city (because of the converter) and like 15 highway.

 

WHOA!!!

 

i got 26-27mpg on a 1600 mile trip a couple months ago h/c 6speed LT1 w/ mail order tune from madz28 (still needs some tweaking but not worried about it since it's all coming apart very soon)

 

i get 24 highway going 75. about 15 mixed, and 10-12 city, but i have M6 with 4.10's 75 is cruising at about 2200 rpm

i have the cc502 918 springs 1.6rr's ported heads Lt's and some big 275front/315rear

tune is for a cc305 and high altitude(denver) but i think that's why mpg is so good on hw

i live in KS so it knocks a lot when lugging though

 

I get 75 miles in the city with $20 of gas ....

 

if you're concerned about mileage get a h-car.

you have modified the engine for more power...do you understand that it takes FUEL and AIR for power? that means one, air if free...and two...fuel costs about 3 bucks a gallon for premium.

if you want mileage then take away the cam for a stocker and be satisfied with the 25/29mpg rating of the engine.

 

Maybe he likes to drive his car on the street or daily? Theres nothing wrong with going for power and efficiency. Hell, isnt that the arguement GM lovers always like to use about their motors?- "The new Z06 makes 500hp and still gets 26mpg on the highway!!" I cant count the number of times I've heard that quote.

 

25MPG on 300plus mile trip. T-tops off, windows down, mostly driving a little aggresively.

 

Ugh.. i need a tune too, I get 12mpg city 18mpg highway..