Bronco Forum - Full Size Ford Bronco Forum banner

bypassing smog pump...serp belt size?

2.7K views 7 replies 5 participants last post by  KingSize  
#1 ·
Ok, forgive me if i don't explain myself well and it sounds like I don't know shit......because...I don't! I am a decent mechanic to the point of where I know to stay out of the internal engine . ha. anyhow, I have bought an '87 with a 302. Had it less than a week and got it for a song. the smog pump is shot, seems like the bearings are gone in it and makes a rattle like and old chevy would .....hahaha. ok, seriously. does anyone know what size serpentine belt I can run on it to bypass the smog pump? I live in a county where there is no emissions and so i figure why not take it off and bypass it. I can not find any references anywhere and the part store seem to protect any information about smog pumps like they are government nuclear weapons....I think i will solve who shot Kennedy before I can find a part store guy to tell me straight. thanks in advance and .....yeah I am a newbie and can not wait to get my Bronco lookin like some I have seen in the pictures here. later all!
 
#7 ·
As previously stated unless you will be virtually Off-Road only, won't need to pass DEQ emissions inspection and you plan on removing the entire Smog Pump system the Smog Pump itself has very little parasitic power drain. It is usually better to keep the system intact and replace the pump.

In fact there is virtually no gain from removing the pump and replacing it with a smog pump delete pulley as the parasitic loss of the delete pulley is virtually equal that of the smog pump itself when in good free working condition. Only minute gains will be made with a full smog pump system removal. Most of that just in weight and freeing up the engine bay.

There is this strange misperception that smog pumps rob power. Your A/C unit weighs more and has much more parasitic drag than a good working smog pump.

:beer