throttle body downsize
03-13-2008, 11:49 AM
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throttle body downsize I have an LS1 , I am going to change the TB from a 90mm FAST unit to the stock one . Could anyone advise what the performance loss will be ? as well as how it will affect the tune-up . I know it's sorta hard to answer these questions without knowing the specifics. But just looking for some generalities . Car currently goes 9.60's at 135 mph weighing 3000 lbs .
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