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turbo350 · 07-05-2012, 11:34 PM

Definitely not buying a Sub for fuel mileage lol. But how much of a difference in mpgs in a 350 vs 454 Subs (89-90). Found an '89 2wd 454 t400 trans, 3.73 rear. Owner put an Edelbrock tbi intake on and says the power gain was noticeable. Would I be lucky to pull 11-12 mph with it? What mpg could I expect from the same Sub with a mostly stock 350 tbi?

07-05-2012, 11:34 PM	#1
turbo350 Registered User Join Date: Aug 2005 Location: Twin Cities, MN Posts: 316	Mpg-bbc vs sbc Suburban Definitely not buying a Sub for fuel mileage lol. But how much of a difference in mpgs in a 350 vs 454 Subs (89-90). Found an '89 2wd 454 t400 trans, 3.73 rear. Owner put an Edelbrock tbi intake on and says the power gain was noticeable. Would I be lucky to pull 11-12 mph with it? What mpg could I expect from the same Sub with a mostly stock 350 tbi?