i have a 350 stock short block w/ stock centerbolt heads (dont know what casting) a comp 262 xtreme cam, performer intake and edelbrock 600 carb. i get a ****ty 165 miles per tank. anyone w/ similar setups care to share??? oh btw i have my timing set at 6 or 8 degrees w/ plenty of mechanical and vacuum advance, so i dont think theres a problem there. though i have never actually observed what my total curve was...

 

btt

 

I have the stock 305 W/ the Same Cam, Stock 416 Heads ect.

3.42 Gears in back w/ 275/40R17's.

Im getting 23 mpg At best, This is on a 795 CFM quadrjet Running 74's in the primary.



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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver 14.82 @ 91.1 (faster than Ed)
Reader's ride -> My Ride

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

I have the exact same setup as you, except with edelcrock headers and 3" catback exhaust.

Driving 80% city/20% highyway, I get around the same mileage as you - although I live on the BC coast which is quite mountainous, alot of steep hills and what not. Gotta love the 3.73's for that action.

On the highway, I snag about 20-21 miles to the gallon, cruising at 70mph, spinning close to 2,700RPM.

Yeah, its crappy mileage.

Later,
Hype.

 

well i must have something wrong then because I have 3.08's and you guys w/ steeper gears are gettin the same mileage....damn i gotta look into what the problem might be