Why remove A.I.R. pump?
Race Director
Joined: Aug 2000
Posts: 11,470
Likes: 764
to any of my 85 friends -- if you are thinking about trashing your smog pump, remember, it's a one year only part. replacements are tough to find - even rebuilds, since cores are scarce. I once saw an, in the box, NOS assembly for $500 (asking). keep it, along with mounting hardware as part of the car. at some point, these things (in this case 85's), are going to become more valuable and originality will become important. somewhere down the road, someone may just want to put it back to factory configuration. 
Drifting
Joined: Dec 2000
Posts: 1,785
Likes: 91
From: Leander TX
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Only "restrictor" in the intake is the lovers over the air cleaner. Cut those away and add a K&N for increased air flow.
As mentioned most benefit from the AIR pump deletion is ease of working on front of the engine.
If your L98 still as the "frisbee" on the water pump pulley, remove it for a little HP gain (~10chp) when accelerating.
A 160deg T-stat will bring some extra HP as well.
These are the first "mods" I did to my "new" '89, though the prior owner had graciously already installed a 160deg T-stat.
I'm too lazy/cheap to install a fan sw, so I just turn on the A/C when in traffic and then off again when traffic clears and I want/need the HP.
As mentioned most benefit from the AIR pump deletion is ease of working on front of the engine.
If your L98 still as the "frisbee" on the water pump pulley, remove it for a little HP gain (~10chp) when accelerating.
A 160deg T-stat will bring some extra HP as well.
These are the first "mods" I did to my "new" '89, though the prior owner had graciously already installed a 160deg T-stat.
I'm too lazy/cheap to install a fan sw, so I just turn on the A/C when in traffic and then off again when traffic clears and I want/need the HP.
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