If you eliminate air pump...am I nuts?
01-13-03 | 09:27 AM
#1
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From: Dallas
If you eliminate air pump...am I nuts?
I just got to thinking. The stock belt runs around the water pump pulley clockwise and then up around the airpump before going to the main pulley. When the air pump is eliminated the belt winds counter-clockwise around the water pump before going around the main pulley.
This means that the waterpump is now spinning backwards if the air pump is removed???
I guess it works anyway???
This means that the waterpump is now spinning backwards if the air pump is removed???
I guess it works anyway???
01-13-03 | 09:43 AM
#2
Senior Member
Joined: Feb 2001
Posts: 741
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From: Queens, NY
The belt keeps the same path after removing the air pump. It follows the red line in this crudely MS Paint'd diagram I made here:
As you can see with the stock pullies there is very little belt contact with the water pump pulley. In fact there is so little contact that you can actually twist the pulley with your hand when the car is off. This is why people recommend getting a pulley kit if your going to eliminate your air pump.
As you can see with the stock pullies there is very little belt contact with the water pump pulley. In fact there is so little contact that you can actually twist the pulley with your hand when the car is off. This is why people recommend getting a pulley kit if your going to eliminate your air pump.
That makes more sense. I thought I had seen the belt go around the outside of the w/p and not the inside.
01-13-03 | 11:11 AM
#6
Originally posted by Scrub
If i order the Greddy pulley kit do i have to remove the air pump? Im guessing thats what the pulley kit does, correct?
If i order the Greddy pulley kit do i have to remove the air pump? Im guessing thats what the pulley kit does, correct?
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01-14-03 | 01:06 AM
#8
fart on a friends head!!!
Joined: Mar 2002
Posts: 4,104
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From: sheppard AFB, TX
its very nice too. . . it only makes sense to keep more tension on the waterpump, ya know. if you dont have an upgraded main drive pulley then it doesnt matter, but if you have one then the tension is backed off tremendously from the water pump pulley.
paul
paul
11-27-03 | 09:47 PM
#12
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From: IN
Why are you removing the air pump? The only reason I removed mine was b/c I switched to a mp, and didn't need the air supply to the main cat anymore. I plugged the air supply line after removing the air pump, and left the ACV in place.
04-22-07 | 09:12 PM
#17
Originally Posted by David Beale
I just used the Greddy pulley kit (and belt) when I removed mine. It works fine. No indications of the belt slipping on the pump pulley.
We really love to worry, don't we?
We really love to worry, don't we?
there is a tendency to tighten the belt too much so that the WP will
keep turning at high speeds.
Doing so has destroyed at least one engine.
04-22-07 | 11:20 PM
#18
Get Sidewayz
Joined: Mar 2005
Posts: 288
Likes: 0
From: Washington
I had a fabricator modify the adjustable arm that your alternator tension system rides on. My alternator sits a little higher and a little more to the left because it extended the bracket, didn’t have any issues with hood clearance and it gave me a little more surface contact on my water pump. I haven't bought aftermarket pullies like I should but it would help with or without those pullies I guess...
04-23-07 | 06:51 PM
#19
Pineapple sells an air pump elimination idler kit:
https://www.rx7club.com/pineapple-racing-171/pineapple-racing-products-575454/
https://www.rx7club.com/pineapple-racing-171/pineapple-racing-products-575454/
04-23-07 | 06:54 PM
#20
Originally Posted by Blake
FD Airpump Elimination Idler Pulley Kit. Special pulley tucked under water pump neck to take the place of the air pump pulley, preventing the water pump from slipping. Most large single turbos do not fit with the air pump installed, but deleting the air pump causes the water pump to slip. This pulley wraps the serpentine belt around the water pump, preventing slippage without causing a fitment problem with the turbo. An over-tensioned belt can wear bearings, break belts and even break the eccentric shaft (!!!).
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