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Had my throttle body modded in the fall along with new bushings, the TB works OK being flowed at 785cfm with no boring. Problem is the throttle is sticky just off idle and I have to lube it once in awhile- this really bugs me. Any body here machined in a pair of sealed bearings for the shafts of a TPI/LT1 TB?
I have the same problem with my stock throttle body. Not sure if it was the blades sticking or what.
__________________ 1997 Corvette, lowered with Bilstein Sports, tinted lights/windows, painted rear fascia 1998 Trans Am, LS6 hot cam, LS6 intake, LTs/ORY/cutout, 3500 stall/3.73's (wife's) 1989 Formula, Viper blue paint, black TT's, L98 swap in progress (brother-in-law's) 1998 Camaro Z28, heads/cam/Fast90, nitrous, Spec 3, Moser/Strange 9" SOLD
1988 Trans Am, 355ci with LT1 head/intake conversion slammed on C5s SOLD
What I did on my old 48mm was to adjust the TB screw,
under cap: And open it up just slightly. Iac should compensate for that.
Worked for me
Might also check to see if the blades are centered.
HTH
Later
When the TB is completely closed, it creates a vaccuum, sucking the blades tight against the bore. Cracking open the idle stop screw should help, as long as the IAC has enough movement to compensate for it. Some folks also drill small holes in the blades...
Ahh, the old hole in the throttle plate trick- used that one years ago for a Quadrabog. Didn't know it still works. Found a guy that will install needle bearings for $55.
I lubed up my throttle and tran and cruise cables helpped a little bit, before all that i was always hitting it to hard and chrip tires once in a while
