Belt swap and an idea.
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Senior Member
Joined: Dec 2000
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From: Portland, Oregon. USA
Belt swap and an idea.
I just swapped both my belts with GoodYear Gatorbacks. I used the 4080675 for the blower (4lb lower and 1.5lb upper), and the 4080990 for the accessories belt. I got both from Auto Zone online. The blower belt was $23.99 and the acces. belt was $28.99, freight was $5.27.
I also repacked all the belt idler bearings while I had it apart. Good thing too, all the bearing were dry.
While I was installing the new accessories belt I had an idea. Has anyone tried running a shorter belt on the accessories and by passing the A/C pump? Even with the A/C off it is still turning. I may try it the next time to the track. It looks like the blower belt may fit if you skip the A/C pulley. Free H/P?
I also repacked all the belt idler bearings while I had it apart. Good thing too, all the bearing were dry.
While I was installing the new accessories belt I had an idea. Has anyone tried running a shorter belt on the accessories and by passing the A/C pump? Even with the A/C off it is still turning. I may try it the next time to the track. It looks like the blower belt may fit if you skip the A/C pulley. Free H/P?
Senior Member
Joined: Oct 2000
Posts: 237
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From: Texas. USA
Hp Gain would be minimal.
Silver-Bolt,
I would think the HP gain by bypassing the AC, would be next to none, because with the AC kompressor turned off, the pump acts as nothing more than an idler pully in itself. (unless the bearing has excessive drag, due to being worn out)
Just my nickels worth
I would think the HP gain by bypassing the AC, would be next to none, because with the AC kompressor turned off, the pump acts as nothing more than an idler pully in itself. (unless the bearing has excessive drag, due to being worn out)
Just my nickels worth
Senior Member
Joined: Oct 2001
Posts: 2,456
Likes: 1
From: SE Mich
I can give a little insight and advise on this one since I designed the W/P and how it relates to the FEAD system.
1) you'll only loose .1 hp or so at 5500rpms from a free wheeling a/c pulley (assuming everything is in proper working condition)
2) (and most important) if you change the belt load vector on FEAD components to a direction that they were not designed for, you run the risk of over stressing them. And may even break castings/ prematurely wear out the bearings.
Fortunatly in this subjects context of disconecting the a/c you are there-by removing the biggest "hit" when the compressor kicks on/off.
FYI: The w/p on a 5.4L sees a 540lb load when at a mid range rpm and the a/c kicks on.
WOT
1) you'll only loose .1 hp or so at 5500rpms from a free wheeling a/c pulley (assuming everything is in proper working condition)
2) (and most important) if you change the belt load vector on FEAD components to a direction that they were not designed for, you run the risk of over stressing them. And may even break castings/ prematurely wear out the bearings.
Fortunatly in this subjects context of disconecting the a/c you are there-by removing the biggest "hit" when the compressor kicks on/off.
FYI: The w/p on a 5.4L sees a 540lb load when at a mid range rpm and the a/c kicks on.
WOT