displacement and gas mileage
05-13-2004, 05:48 PM
#1
Burning Brakes
Thread Starter
displacement and gas mileage
how much does displacement affect gas mileage? example, how much harder on gas would a 406 SBC be than a 350 SBC? also, what would be harder on gas, a 427 SBC or a 427 BBC? I know all things being equal the big block will make more power since the heads flow better, so that would mean its more efficient right? but would the extra efficiency be enough to overcome the extra weight? i know you don't buy vettes for fuel economy but witht the price of gas nowadays it's something to keep in mind. thanks, Adam
05-13-2004, 06:14 PM
#2
Team Owner
Re: displacement and gas mileage (hubes)
Well....everyone can draw their own performance standards and equations to suit that need, and then come up with a compromise based on reality....
I figger a clutch near 400 hp from ~350 ci, and so forth in a 3300 lbs car is a somewhat reasonable standard, not fast, not slow, just half-fast....
but any car significantly slower than that, meaning 3-4 seconds/ 1/4 mile is getting pretty poor, and anything really SIGNIFICANTLY faster than that is really getting edgy on fuel economy....I realize this is all IMO, and SWAG, but well given the AFFORDABLE easily transplanted tech available today, that seems the limit.....
sure, for instance I could get a late LS1 and maybe transplant it into my shark, but in the final **** ysis, what is the total gain over the next say 5 years....??? I got nearly 400 hp now, at 20 mpg or so....freeway....
so I get say 28 mpg??? you all with the handy andy jim dandy calculator figger out that cost/bene ratio.....I allready know it's out to lunch....
GENE
I figger a clutch near 400 hp from ~350 ci, and so forth in a 3300 lbs car is a somewhat reasonable standard, not fast, not slow, just half-fast....
but any car significantly slower than that, meaning 3-4 seconds/ 1/4 mile is getting pretty poor, and anything really SIGNIFICANTLY faster than that is really getting edgy on fuel economy....I realize this is all IMO, and SWAG, but well given the AFFORDABLE easily transplanted tech available today, that seems the limit.....
sure, for instance I could get a late LS1 and maybe transplant it into my shark, but in the final **** ysis, what is the total gain over the next say 5 years....??? I got nearly 400 hp now, at 20 mpg or so....freeway....
so I get say 28 mpg??? you all with the handy andy jim dandy calculator figger out that cost/bene ratio.....I allready know it's out to lunch....
GENE
