The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - TPI Gas Mileage (longhorn man & any others)

**Boog** · 03-23-2006, 09:03 PM

It might be interesting to compare the present engine specs to the engine the TPI came off of. Compression ratio, valve size, intake runner size and the cam may be a good bit different than the current setup. Obviously the sleek shape of the Camaro will help in the mileage dept compared to a truck. 31" tall tires are a good bit taller than the Camaro tires though. 2,000 rpm @ 70 mph is right where it needs to be. Is that mileage checked around town or at 70? Speedo been checked for accuracy?

03-23-2006, 09:03 PM	#12
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,659	Re: TPI Gas Mileage (longhorn man & any others) It might be interesting to compare the present engine specs to the engine the TPI came off of. Compression ratio, valve size, intake runner size and the cam may be a good bit different than the current setup. Obviously the sleek shape of the Camaro will help in the mileage dept compared to a truck. 31" tall tires are a good bit taller than the Camaro tires though. 2,000 rpm @ 70 mph is right where it needs to be. Is that mileage checked around town or at 70? Speedo been checked for accuracy? __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross