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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: lukieg on December 18, 2011, 09:45:34 pm
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Ok so i found out the 366 had holes in the thermostats.. which could cause some of my issues, since its beloz zero everyday now.. plus no enclosed air cleaner with a heat thingy... so im hoping with the addition of those items... it may help,sound right?? Oh also I have a 600 4160 holley.. is it possible to lean down the primaries anymore to get the mileage up some aswell? Thanks gents
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what are you gettign for fuel mileage cause so far that i see the best a 366 could get is 9 which my dually and another persons c-60 get so i dont think no matter what you do 9mg is the limit for fuel mileage high
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Yes but its been getting worse and worse as the cold draws in. Im gettin like 4-5 its sick.. The main jets are 64 stock... but with the stock tall decks low reving set up.. could i get away with maybe 55-57 primarys to lean it down more?