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Donnylee · 03-04-2007, 01:47 PM

My Buddys 85 Dually gets about 9MPG. Roughly 12 on the freeway. Its about the same as the 91 Dually I had with TBI. Bottom line is 454s are plain thirsty. What you can do is make sure your jet/rods are not overtly to fat, and your running optimum total timing. To much retard, and they become thirsty pigs.

I also agree Edelbrock carbs are always seeming to be over jetted in my experience. Jeff makes alot of good points, tune, tune, tune..... A good running tuned engine will be efficient. But on that same note efficient and 454 do not go together very well..... Good luck!

03-04-2007, 01:47 PM	#7
Donnylee Registered User Join Date: Feb 2007 Location: Oregon Posts: 44	Re: Newbie with 454 sucks 6 mpg My Buddys 85 Dually gets about 9MPG. Roughly 12 on the freeway. Its about the same as the 91 Dually I had with TBI. Bottom line is 454s are plain thirsty. What you can do is make sure your jet/rods are not overtly to fat, and your running optimum total timing. To much retard, and they become thirsty pigs. I also agree Edelbrock carbs are always seeming to be over jetted in my experience. Jeff makes alot of good points, tune, tune, tune..... A good running tuned engine will be efficient. But on that same note efficient and 454 do not go together very well..... Good luck! __________________ Would you rather be eating Government Cheese down by the river, and living in a C-10~!