RS Pulley: what does it look like?
#1
Nordschleife Master
Thread Starter
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My mechanic ordered an RS pulley, and it looks wrong. It is at least 2x the diameter of the regular pullies. Even if this fits, it would slow the fan and alternator to unacceptable levels. Anybody have a real RS pulley? What does it look like?
Thanks
Thanks
#4
Nordschleife Master
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Thanks... so what I was looking at was the lower pulley! Good. I guess I need that alternator hub, which looks like part 993-106-054-80? Is that it? Do I use the standard size belt?
Thanks for the help.
Thanks for the help.
#5
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std 9.5x776 belt
993-106-051-80 impeller hub for the alternator
993-102-050-40 pulley(single sheave) for the crankshaft
993-102-050-41 pulley(double sheave for AC) for the crankshaft
But w/ AC you might as well use the stock -01 triple sheave
single sheave
![](https://forums.pelicanparts.com/uploads9/DSCN32261162038831.jpg)
Triple sheave
double sheave
993-106-051-80 impeller hub for the alternator
993-102-050-40 pulley(single sheave) for the crankshaft
993-102-050-41 pulley(double sheave for AC) for the crankshaft
But w/ AC you might as well use the stock -01 triple sheave
single sheave
![](https://forums.pelicanparts.com/uploads9/DSCN32261162038831.jpg)
Triple sheave
![](https://forums.pelicanparts.com/uploads9/2_17_06_+0081162038877.jpg)
double sheave
![](https://forums.pelicanparts.com/uploads9/LRPClubRace_May2003+0531162039421.jpg)
#6
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If installing RS impeller wheel hub 993 106 051 80
bare in mind that you need different studs and nuts than for the standard.
Studs x 3 part number 999.062.093.02 (BM 6 x 35)
Nuts x 3 part number 999.084.094.02 (M6)
total cost for the 6 is less than a fiver ($5)
bare in mind that you need different studs and nuts than for the standard.
Studs x 3 part number 999.062.093.02 (BM 6 x 35)
Nuts x 3 part number 999.084.094.02 (M6)
total cost for the 6 is less than a fiver ($5)
#7
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It is at least 2x the diameter of the regular pullies. Even if this fits, it would slow the fan and alternator to unacceptable levels
If you haven't ordered the pulley yet 993.102.050.41 , I have a suggestion.
There is one brand new from a german ebay seller who lists a lot of porsche parts.
The listing has ended on the item, but probably he still has it.
He was asking 99 euros for it without shipping. new is around $450
Send him an email.
ebay Item number: 160041007659
Last edited by geolab; 10-28-2006 at 11:23 AM.
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#8
Nordschleife Master
Thread Starter
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All,
Thanks for the help... this is becoming clear to me now. Since I retain the A/C, I think I'll retain the stock lower, triple lower pulley. Plus it should make installation easier, especially since this is for a turbo. When done, mine should look like Bill's.
Geo,
Thanks for the idea for eBay... I'll take a peek in a moment. But to show you what a doofus I am, I thought I was looking at a replacement UPPER pulley, where 2x diam would drive it slower. What I was actually looking at was the RS single, lower pulley.
Thanks for the help... this is becoming clear to me now. Since I retain the A/C, I think I'll retain the stock lower, triple lower pulley. Plus it should make installation easier, especially since this is for a turbo. When done, mine should look like Bill's.
Geo,
Thanks for the idea for eBay... I'll take a peek in a moment. But to show you what a doofus I am, I thought I was looking at a replacement UPPER pulley, where 2x diam would drive it slower. What I was actually looking at was the RS single, lower pulley.
#9
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The ebay item is for lower RS pulley with A/C.
For upper pulleys, please find attached the porsche update on this which could make things clearer, plus another bulletin that is Turbo specific
For upper pulleys, please find attached the porsche update on this which could make things clearer, plus another bulletin that is Turbo specific
Last edited by geolab; 11-02-2007 at 06:13 AM.
#10
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Steve,
The simple route is to toss the Alt pulley halves, leave the 3 sheave crank pulley in place, and bolt it all back together with the single 776mm belt as already mentioned. The sole negative to this is the much discussed lower alt speed - which is generally not an issue: I've just pulled the fan from my spare and am in the process of installing the RS pulley.
The first pdf Geo kindly provided is referencing the upgrade to the alternator pulley sheaves wrt sheave and alt. drive belt failures - with the 'RS' set up, you are deleting those items and 760mm belt anyway ... and will run solely on the fan belt.
The simple route is to toss the Alt pulley halves, leave the 3 sheave crank pulley in place, and bolt it all back together with the single 776mm belt as already mentioned. The sole negative to this is the much discussed lower alt speed - which is generally not an issue: I've just pulled the fan from my spare and am in the process of installing the RS pulley.
The first pdf Geo kindly provided is referencing the upgrade to the alternator pulley sheaves wrt sheave and alt. drive belt failures - with the 'RS' set up, you are deleting those items and 760mm belt anyway ... and will run solely on the fan belt.
#11
Nordschleife Master
Thread Starter
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Garth,
I think we are on the same page... but due to incessant doofusness on my part, let me restate:
I will keep the existing, triple lower pulley (but I won't use the middle sheave). I'll get the upper RS pulley kit and combine the fan/alt on a single pulley and belt. Since I have no concern about the alternator turning a tiny bit slower, this should take care of everything. I can still use the stock belt, and my belt tensionor can be removed or wired closed. I can get that RS upper pulley kit for $108, plus shipping and duty, from Gert. Thanks.
I think we are on the same page... but due to incessant doofusness on my part, let me restate:
I will keep the existing, triple lower pulley (but I won't use the middle sheave). I'll get the upper RS pulley kit and combine the fan/alt on a single pulley and belt. Since I have no concern about the alternator turning a tiny bit slower, this should take care of everything. I can still use the stock belt, and my belt tensionor can be removed or wired closed. I can get that RS upper pulley kit for $108, plus shipping and duty, from Gert. Thanks.
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