I plan on getting a ported plenum,superram base, lpe runners, torque cam,headers, chambered exhaust, adjustable fuel regulator thing,new heads, underdrive pulleys, 3.45 gears and a PROM for my 350 tpi all within the next 10 to 12 months. Me being 16 and getting paid min wage and with the way gas prices are going how much will gas mileage suffer?? i heard that the regular mileage for a stock 350 tpi was on the order of like 13/22. Thanx for your replies!!!!!!!

 

um...please?

 

LMFAO
Um, this would obviously be your first car.

Yes. Gas mileage will get worse, especially with steeper gears.
Just how much will depend greatly on how hard you drive it.

Guess in the area of 10 -15. Yeah, 10 city, 15 highway.

 

You make minimum wage and you're going to buy all that crap? I make $45k/year and I can't afford all that crap.

Anyway, of the crap you listed, the cam, AFPR and gears are the only things that will actually have a negative impact on milage. Everything else will promote more efficient combustion and should show an increase. Actually, the AFPR might help if you don't go crazy with it due to better fuel atomization at higher fuel pressures. Overall, your gas milage will depend on the specific selection of components, but if you choose the right combo you might not notice much of a milage loss.

My IROC has a 355 with no stock equipment at all, and even running very, very rich I was still pulling 15-18mpg. Once I get it running right, I'm hoping for 20+ when I keep my foot out of it, which will be better than what I got with the stock 305.