large cams, HPT and drilled TB's?
01-09-2005, 03:01 AM
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large cams, HPT and drilled TB's? Is it still necessary to drill the TB out using bigger cams if tuning with HPT, or is that one of the old skool things much like VE tuning and SD? Seems to be the tuning side has made some leaps n bounds in the last year n half (or less really) and I am not sure its still standard practice to drill TB Blade. TIA.
Charlie
Charlie
01-09-2005, 08:53 AM
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Yes. Cams usually put your IAC counts way up, beyond where it can adjust to maintain proper idle. If you raise your idle, you will definitely need to adjust your set screw, or you will definitely be outside of the IACs range to adjust.
01-09-2005, 11:36 AM
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Even with big cams, you should never drill that throttle body. You can go pretty far on fixing the IAC counts by changing the set screw and fixing it. I have had cams in the 230+ ranges idle fine after those fixes. I never drill the TB.
Rick
Rick
01-09-2005, 11:53 AM
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Originally Posted by Rick@Synergy
Even with big cams, you should never drill that throttle body. You can go pretty far on fixing the IAC counts by changing the set screw and fixing it. I have had cams in the 230+ ranges idle fine after those fixes. I never drill the TB.
Rick
Rick
I forgot to say no drilling, LOL.
01-10-2005, 11:08 PM
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I never messed with the set screw. I used either Diab-blow or edit to raise idle, and for IAC went drilling! Works, but I understand it isn the best route...now. I heard if you adjust the set screw the PCM relearns it and makes adjustments for it, thats why i didnt mess with the ss.
Charlie
Charlie
