Smog Pump Bypass?
Thread Starter
4th Gear
Joined: Feb 2011
Posts: 4
Likes: 0
Smog Pump Bypass?
I Bought my 1988 Corvette Convertable about a year and a half ago. I love it so far. However, last year the smog pump started squeeling. No change in performance but I feel a Vette is supposed to purr not squeel. So I changed it. While doing so I recalled hearing that bypassing the smog pump could add a couple of horsepower and improve gas mileage. Is this so? And are there any potential consequences? Also would I need to cap the line coming from the pump? Any info would be appreciated
Racer
Joined: Nov 2010
Posts: 460
Likes: 1
From: Oliphant Ontario
You can buy a bracket to remove it, it has to have an idler pulley on it for the belt route to work without rubbing on itself (won't route without that pulley period). As far as power gains, maybe 1/2hp, the pump offers almost zero resistance and the air injection itself causes zero power loss.
You can remove the pipe fitting (standard pipe thread) at both manifolds and cap the pipe to the cat. You can also remove the 2 actuators and their plugs, computer won't be aware you did this.
You can remove the pipe fitting (standard pipe thread) at both manifolds and cap the pipe to the cat. You can also remove the 2 actuators and their plugs, computer won't be aware you did this.
Race Director
Joined: Jun 1999
Posts: 14,924
Likes: 9
From: Merritt Ils Fl
I'm guessing you mean a smog pump delete kit.
It will not appreciably increase power
It will not appreciably increase mileage
It will assure you won't pass a smog test
It will not throw a code
It will go a long way in cleaning up the place your engine lives
It is not especially cheap.
It will not appreciably increase power
It will not appreciably increase mileage
It will assure you won't pass a smog test
It will not throw a code
It will go a long way in cleaning up the place your engine lives
It is not especially cheap.
Drifting
Joined: Jan 2002
Posts: 1,261
Likes: 4
From: Middle River MD
I did this recently on my 89...bought a used eliminator kit, removed all the smog stuff in less than 30 min. Installed kit in about 10 min then had to size up a new belt. Works fine and looks much cleaner. No noticeable performance increase. Much easier to get at some of the stuff under the hood now.
Le Mans Master
Joined: Feb 1999
Posts: 6,470
Likes: 2
From: levittown pa. usa Even a bad day with my `Vette, is better than a good day at work
St. Jude Donor '10
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Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
I did the eliminator a while back and its nice to be rid of all that crap. The PO had done some removal of tubing and now I think of it he may have gutted the pump as well since the tubing was removed. He had capped the big tube coming off the ex manifold with a 1/2" pipe cap. I just finished cutting the tubes very close to the ex manifold and tapped them for a 5/16" cap screw. In hind sight I wish I had tapped it to 1/4" to be able to use a pipe plug. I may retap it to 3/8" to do just that.
Good Luck!
Good Luck!
