The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - tell me about inline six/I have some question

shifty · 02-06-2007, 03:04 PM

I had 15" wheels with standard sized tires for those wheels. I upgraded to HEI, but put open headers on at the same time and still saw an increase of 1mpg roughly. Highway driving with the 3spd killed me because at 65mph I was running too many RPM's to be very efficient. 8mpg was max I would get. I have no idea about city driving. Not very feasible to do much stop and go with 3-on-tree, no power steering and in heavy traffic.

02-06-2007, 03:04 PM	#5
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,373	Re: tell me about inline six/I have some question I had 15" wheels with standard sized tires for those wheels. I upgraded to HEI, but put open headers on at the same time and still saw an increase of 1mpg roughly. Highway driving with the 3spd killed me because at 65mph I was running too many RPM's to be very efficient. 8mpg was max I would get. I have no idea about city driving. Not very feasible to do much stop and go with 3-on-tree, no power steering and in heavy traffic. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.