Air Pump & 928SP Modular Crossover
Three Wheelin'
Joined: Dec 2003
Posts: 1,729
Likes: 0
From: Vancouver, Canada
Originally Posted by Hacker-Pschorr
No need for any new products - this has been covered before:
https://rennlist.com/forums/928-forum/132878-short-fan-belt.html
https://rennlist.com/forums/928-forum/132878-short-fan-belt.html
Glenn
Thread Starter
Three Wheelin'
Joined: Jan 2005
Posts: 1,664
Likes: 7
From: Dubuque, Iowa.
Originally Posted by sharkmeister85
Okay, I was thinking about getting rid of the air pump too. Did anyone else read the thread H-P referenced and come away thinking you could use one belt off the crank, to spin the fan and alternator, even though they don't line up exactly?The reason being you could use the alternator for tensioning?
Glenn
Glenn
928 Engine Re-Re-Rebuild Specialist
Rennlist Member
Rennlist Member
Joined: Oct 2001
Posts: 7,972
Likes: 34
From: Brighton, MI
I completely eliminated my air pump and all its plumbing. I believe the belt I used for the fan is 21" long and from a lawnmower, though I don't have the part number handy. The tension on the belt is correct without the need for a tensioner. My car continues to run with the temp gauge slightly lower that it did with the air pump, although this is probably due to the elimination of the cats and not the air pump.
Remember that you'll need to plug a vacuum line for the air pump plumbing if you remove it.
Remember that you'll need to plug a vacuum line for the air pump plumbing if you remove it.
Banned
Joined: Jul 2005
Posts: 2,066
Likes: 1
From: Philly
I only run the Power steering and alt. belts.
I have a high output electric pusher, it cools the engine a lot better than the OEM clutch fan ever did, it's a tad lighter than the clutch fan, and it frees up a couple ponies.
I have a high output electric pusher, it cools the engine a lot better than the OEM clutch fan ever did, it's a tad lighter than the clutch fan, and it frees up a couple ponies.
Three Wheelin'
Joined: Dec 2003
Posts: 1,729
Likes: 0
From: Vancouver, Canada
Originally Posted by m21sniper
I only run the Power steering and alt. belts.
I have a high output electric pusher, it cools the engine a lot better than the OEM clutch fan ever did, it's a tad lighter than the clutch fan, and it frees up a couple ponies.
I have a high output electric pusher, it cools the engine a lot better than the OEM clutch fan ever did, it's a tad lighter than the clutch fan, and it frees up a couple ponies.
Glenn
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Banned
Joined: Jul 2005
Posts: 2,066
Likes: 1
From: Philly
"Ultimately, this would probably be the best solution, when you can put an electric fan instead of the stock clutch fan. Why did go with the "pusher"? I thought the "puller" was supposed to be more efficient."
I originally installed both a pusher and a puller, because i expected to need them. When i realized that with two it never even achieved operating temperature(even on a hot day) running both, i tried running one or the other to see which gave the best results. Of the two(identical models btw), the pusher showed much better cooling in real world conditions, so i deleted the puller.
I originally installed both a pusher and a puller, because i expected to need them. When i realized that with two it never even achieved operating temperature(even on a hot day) running both, i tried running one or the other to see which gave the best results. Of the two(identical models btw), the pusher showed much better cooling in real world conditions, so i deleted the puller.
