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Call Keith Craft and ask and then call Quick Fuel and ask.
Coach did this last week for a Quick Fuel on a 408 that had been dyno'ed, 530 hp 540 tq. Keith and Quick Fuel told him the same sizes to start with.
But Mike was getting 6 to 7 mpg. And the car ran great! It did run a little rich at idle. He called us and set up a day he could drive up and let Coach check the carb. Coach is our carb guy.
On the 130 mile trip to Coach's shop he got 8.4 mpg. A lot of interstate hiway cruising. After changing the jets, and I don't know what size to what size, but I do remember he jetted everything down 4 to 6 sizes.
On the 130 mile trip home Mike got 13.5 mpg. And it still ran great.
What we learned was just because they dyno' it for max hp does not mean they tune it for street driving. They don't know what exhaust system you will use nor the air cleaner.
Dwight
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''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
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