If you wanna get rid of the thermactor system, but you don't wanna remove any of its components,you can use the following diagram and a 89.5" belt (if youve got stock pulleys) & bypass the smog pump pulley altogether.Cobras, & GT's with underdrive pulleys,may require a different length belt.If you don't wanna buy a new belt,you can remove the vacuum hose at the tab (bypass) valve and plug the hose.This will cut the vacuum supply to the valve,which will dump smog pump air to the atmosphere via silencer ports in the valve.You can also use the method 90lxwhite mentioned in post #12
(i.e.- let the air blow out of the tad,diverter valve) Im not sure if the air coming out of the diverter valve will make any hissing noises or not?? Dumping the air out of the tab silencer ports will NOT.....
91 LX 342ci (10.5:1)
TFS 190cc (stage ll)
GT40 (tubular) intake
Weld ProStar XP's
Last edited by wbrockstar; 07-11-2019 at 10:52 PM.