Overpassing smog pump (what woud I gain)

[Alex R]

I'm not running any cats on my truck so what would I gain or lose??? Thanks for any info. guys.

Alex

 

[Lightning Struck]

You wouldn't really gain that much..It makes the passenger side of the engine compartment alot cleaner, and it takes off weight from the front end. Unless the airpump is seized or is hanging up, I would say maybe 2-3HP.. Almost makes it so the major gains are had from the reduction of weight.

I did this on my 88GT, and it's a pain in the buttocks to do it correctly..I did it when I had the heads off, so I could plug up the thermactor ports on the back of the heads. I took the stock thermactor and welded it shut, looking back it would have been better just to use pipe plugs and possibly JB welded them in, or tapped the holes..

I plan on doing this sometime, probably when I do heads again. I won't get emissions legal heads so I won't have to plug them..

 

[Alex R]

I was thinking of just overpassing it with the belt. Not take anything off because next year I have to smog it (California :m )
and that way I could just put the belt back on when it was time to smog it. So just 2-3 HP I thought it would be more. thanks

Alex

 

[Lightning Struck]

Well there really isn't that much resistance in that pump, it's pretty easy to turn.. Plus it really doesn't spin that fast since there's a pretty good sized pully on it.. Plus it really doesn't put out much pressure..

 

[Litl Sam]

What about bypassing the AC?

 

[Lightning Struck]

The AC doesn't pull that much HP either without the heat or AC on..You're just rotating a pully, since the pump is clutched.