RS pulley and belt
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From: Nova Scotia
The RS hub deletes the alt belt by locking the inner alt. shaft to the fan hub: this leaves the alt slightly underspeed - and allows deletion of the infernal roller/tension wazoo if a jumper wire is placed in its connector. The alt dash light would warn of belt loss, as the fan belt & pulley are retained.
Glad to have done the mod - the PO lost several belts with the conventional system - if the alt belt broke, which was the case, it would also take out the fan belt
Glad to have done the mod - the PO lost several belts with the conventional system - if the alt belt broke, which was the case, it would also take out the fan belt
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From: Virginia
There is quite a bit of info on this if one searched.....
But in short, you'll need part #'s 993.106.051.80-- impeller hub for the alternator and 993.102.050.40 pulley for the crankshaft.
In the event of belt failure, it is much easier to switch out the belt with the RS Pulley Setup. You got less weight as well due to the removal of several shims used with the dual belts. Engine seems to rev a bit more freely.
Downside ?--because the alternator is spinning at lower revs, some report having dimming interior lights at idle and when running radio, ac, headlights and fogs.
I do notice my interior lights dim somewhat at idle but have experienced no other adverse side effects.
But in short, you'll need part #'s 993.106.051.80-- impeller hub for the alternator and 993.102.050.40 pulley for the crankshaft.
In the event of belt failure, it is much easier to switch out the belt with the RS Pulley Setup. You got less weight as well due to the removal of several shims used with the dual belts. Engine seems to rev a bit more freely.
Downside ?--because the alternator is spinning at lower revs, some report having dimming interior lights at idle and when running radio, ac, headlights and fogs.
I do notice my interior lights dim somewhat at idle but have experienced no other adverse side effects.
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There is quite a bit of info on this if one searched.....
But in short, you'll need part #'s 993.106.051.80-- impeller hub for the alternator and 993.102.050.40 pulley for the crankshaft.
In the event of belt failure, it is much easier to switch out the belt with the RS Pulley Setup. You got less weight as well due to the removal of several shims used with the dual belts. Engine seems to rev a bit more freely.
Downside ?--because the alternator is spinning at lower revs, some report having dimming interior lights at idle and when running radio, ac, headlights and fogs.
I do notice my interior lights dim somewhat at idle but have experienced no other adverse side effects.
But in short, you'll need part #'s 993.106.051.80-- impeller hub for the alternator and 993.102.050.40 pulley for the crankshaft.
In the event of belt failure, it is much easier to switch out the belt with the RS Pulley Setup. You got less weight as well due to the removal of several shims used with the dual belts. Engine seems to rev a bit more freely.
Downside ?--because the alternator is spinning at lower revs, some report having dimming interior lights at idle and when running radio, ac, headlights and fogs.
I do notice my interior lights dim somewhat at idle but have experienced no other adverse side effects.
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The RS hub deletes the alt belt by locking the inner alt. shaft to the fan hub: this leaves the alt slightly underspeed - and allows deletion of the infernal roller/tension wazoo if a jumper wire is placed in its connector. The alt dash light would warn of belt loss, as the fan belt & pulley are retained.
Glad to have done the mod - the PO lost several belts with the conventional system - if the alt belt broke, which was the case, it would also take out the fan belt
Glad to have done the mod - the PO lost several belts with the conventional system - if the alt belt broke, which was the case, it would also take out the fan belt
With the RS hub, the fan runs at the same speed while the alt runs somewhat slower, which may cause a charging deficiency if in stop-and-go traffic.
RS hub allows MUCH easier changing of belts.
Might rev a little more freely, but that doesn't translate into improved performance on the street.
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Joined: Oct 2003
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From: Nova Scotia
Quote:
Originally Posted by Garth S
The RS hub deletes the alt belt by locking the inner alt. shaft to the fan hub: this leaves the alt slightly underspeed - and allows deletion of the infernal roller/tension wazoo if a jumper wire is placed in its connector. The alt dash light would warn of belt loss, as the fan belt & pulley are retained.
Glad to have done the mod - the PO lost several belts with the conventional system - if the alt belt broke, which was the case, it would also take out the fan belt
With respect, I'm quite sure that I said "tension" .... not " tensioner" - in the absence of fan belt tension - sic - broken belt, the little (annoying) roller springs inward, opening the circuit to fire off the dash icon - a valuable function if the two belt system is in play
Second point, I would not agree with the view that this sensor is "deletable irrespective of retaining both belts ": were this done, there would be no indication to the driver of a broken fan belt - somewhat crucial information in an air cooled car ... no?
With the OEM two belt system, each belt has its alarm icon in event of failure: when adapting to the single belt RS hub system, the alternator icon may be chosen to alert of failure of that single/common fan belt. The roller device can clearly be left in place .... but one view is that it becomes a redundant warning device.
As its roller has a particular pathetic bearing prone to short life ..... leading to the arm and subsquent 'non - rolling' roller scrubbing against the back side of an otherwise healthy fan belt, I have chosen to terminate its redundancy. To leave this sensor in play can be a source of comfort to others ..... either way works
Originally Posted by Garth S
The RS hub deletes the alt belt by locking the inner alt. shaft to the fan hub: this leaves the alt slightly underspeed - and allows deletion of the infernal roller/tension wazoo if a jumper wire is placed in its connector. The alt dash light would warn of belt loss, as the fan belt & pulley are retained.
Glad to have done the mod - the PO lost several belts with the conventional system - if the alt belt broke, which was the case, it would also take out the fan belt
With respect, I'm quite sure that I said "tension" .... not " tensioner" - in the absence of fan belt tension - sic - broken belt, the little (annoying) roller springs inward, opening the circuit to fire off the dash icon - a valuable function if the two belt system is in play
Second point, I would not agree with the view that this sensor is "deletable irrespective of retaining both belts ": were this done, there would be no indication to the driver of a broken fan belt - somewhat crucial information in an air cooled car ... no?
With the OEM two belt system, each belt has its alarm icon in event of failure: when adapting to the single belt RS hub system, the alternator icon may be chosen to alert of failure of that single/common fan belt. The roller device can clearly be left in place .... but one view is that it becomes a redundant warning device.
As its roller has a particular pathetic bearing prone to short life ..... leading to the arm and subsquent 'non - rolling' roller scrubbing against the back side of an otherwise healthy fan belt, I have chosen to terminate its redundancy. To leave this sensor in play can be a source of comfort to others ..... either way works
Burning Brakes
Joined: Mar 2003
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From: NJ
I think this was before Noah figured out the search function.
click on link belowhttps://rennlist.com/forums/showthre...ferrerid=13070
Last edited by CornerCarver; Jun 4, 2008 at 12:01 AM.
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From: Memphis/Chicago
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From: Nassau (Bahamas) and Abu Dhabi (UAE)
I just posted this pic on my 3.8 conversion thread over on Channel 964.
This is part (or similar) (along with correct belt) you'll need.
Would have loved to have done the Smart Racing double pulley mod but a/c is yer friend in hot 'lanta.
This is part (or similar) (along with correct belt) you'll need.
Would have loved to have done the Smart Racing double pulley mod but a/c is yer friend in hot 'lanta.
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From: yorba linda, ca
Assuming you mean when using the single belt system, the alternator light would illuminate indicating the belt has failed.