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AIR pump eliminator = more HP???

malc350

Well-known member
Joined
Jul 6, 2002
Messages
337
Location
Essex, UK
Corvette
1996 LT-4 Z51 CE
Has anyone tried the AIR pump elimintaor available for the 85-91 TPI vette from Mid America? Did it feel like you got more HP. Anyone tested their car on a dyno before and after to see if it really gives more HP?

On paper it sounds like a good idea but I wanted to hear other peoples experiences before shelling out the dough.

All the best from Malc350 (Essex UK) Car: 1990 B2K Callaway Twin Turbo Corvette, black on black, 6-speed.
 

Tom73

Well-known member
Joined
Aug 21, 2001
Messages
1,427
Location
Round Rock, TX
Corvette
73 LS4 Coupe - 04 CE Conv
It does sound good and may give some additional power by not driving the pump but I would bet that you could not feel the difference in the seat of your pants. My "guess" would be 1-2 hp.

tom...
 

maxrevs85

Well-known member
Joined
Dec 17, 2001
Messages
709
Location
Eaton Rapids, Mich
Corvette
!985 ,blue coupe, 4+3 Z51
I have the eliminater. My motor is very modified and I'm not running any smog at all so i didnt need the AIR pump . To eliminate the air pump will not gain you much horsepower. To run the stock serpentine setup it is neccessay to have the eliminater if you are removing the system. i believe it is only a real benifit to the more modified engines.
 

topless82vette

Well-known member
Joined
Nov 1, 2001
Messages
910
Location
southern california
Corvette
1982 convertible (not factory) stock 350cfi auto
ive heard the smog along with providing air to burn fuel in the cat also it is designed to help cool the cat as well, Ive disconnected smog pumps on my trans am before and never noticed any power gain however I did notice that they tend to sieze up real quik after they have been disconnected
 

Ken

Gone but not forgotten
Joined
Jan 30, 2001
Messages
8,236
Location
Hermosa Beach, CA
Corvette
1987 Z51 Silver Coupe
topless82vette said:
... designed to help cool the cat as well

Nope. The air is utilized to provide oxygen to the catalytic converter in order to fire it off sooner. A cold cat will not benefit emissions any.

_ken :w
 

Redbob

Well-known member
Joined
Dec 5, 2001
Messages
239
Location
Cross Roads, Texas, U.S.
Corvette
'89 dk red coupe
malc350 said:
<snip>Anyone tested their car on a dyno before and after to see if it really gives more HP?

snip>

I've done better than that: I've seen the flow curves for air injection pumps, and they consume a maximum of about one horspower or slightly more AT MAXIMUM FLOW. And they don't work all the time, so the power loss is variable. I don't recall the control logic though.

So restricting the airflow to your pump would have about the same effect as removing it. Gutting it is also an alternative: take it apart and remove the little vanes that pump the air - it'll still keep the belt tight, and will be much quieter!

You won't see any effect on acceleration, but your fuel economy should improve. Since your car only requires maybe 12 hp to drive it at 60 MPH, reducing the power loss by 1 hp is fairly significant.
Regards,
- R
 

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