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YOUR RESEARCHRSS 996 Top Seller | Lightweight Underdrive Crank Pulley # 601 | In Stock
Leading reported evidence
Test 601 pulley
Performed · outcome unconfirmed
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Performed · outcome unconfirmed · Original poster
Subsequently we tested the 601 Pulley on a host of street cars including 986, 996, 987, and 997 and experienced no cooling issues of any kind even during the hottest California summers.
RSS 996 Top Seller | Lightweight Underdrive Crank Pulley # 601 | In Stock
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Leading evidence: 'Test 601 pulley' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check belt tensioner and other pulleys, install new belt' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed
I use my 996 primarily as a track car, so the RPMs are are typically "above average".
RSS 996 Top Seller | Lightweight Underdrive Crank Pulley # 601 | In Stock
Check belt tensioner and other pulleys, install new belt
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Suggestion
Make sure you check your belt tensioner and other pulleys, install new belt.
RSS 996 Top Seller | Lightweight Underdrive Crank Pulley # 601 | In Stock
Check pm's
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RSS 996 Top Seller | Lightweight Underdrive Crank Pulley # 601 | In Stock
Check webiste, thanks
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Suggestion · Original poster
The 601 fits, I will double check the webiste, thanks.
RSS 996 Top Seller | Lightweight Underdrive Crank Pulley # 601 | In Stock
Test 601 pulley
No successful repair reported for this finding.
0
Reported fixes
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Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
Subsequently we tested the 601 Pulley on a host of street cars including 986, 996, 987, and 997 and experienced no cooling issues of any kind even during the hottest California summers.
RSS 996 Top Seller | Lightweight Underdrive Crank Pulley # 601 | In Stock
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67 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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RSS 996 Top Seller | Lightweight Underdrive Crank Pulley # 601 | In Stock
Arguably the Best Bang for the Buck upgrade for you Porsche!
Unleash extra power, improve cooling efficiency, avoid boiling the power steering fluid and achieve better throttle response with the # 601 Crankshaft Underdrive Pulley.
The RSS Lightweight High Strength Underdrive Pulley is made from 6061-T6 aluminum. Offers improved HP & TQ by reducing drag from the power steering pump, A/C, water pump and alternator which is a must for any street or track enthusiast Installation wrench included. Fits all Porsche models EXCEPT 2.9L 3.8L, DFI and Turbo/GT3. We recommend using the appropriate length
belt RSS # 6PK which can be purchased separately
.
http://roadsportsupply.com/search.ph...ection=product
Yes , I will PM you the code. Pulley also has a 10 year + reliability track record without fail.
Fits all 3.4L 3.6L 996 motors. I will check the website vehicle configuration, thanks for heads up!
I purchased both your semi solid motor mounts and the underdrive pulley/belt.
Great quality and machinery on both products (15 year tool/die maker), it is the first thing I look for when buying items like this.
David
So the pulley is sold for $210 seperately from the belt? And the belt alone costs $30? I just don't see why it's more expensive than the Tune Rs pulley that comes with the belt for less than $200. Am I correct that the belt is sold seperatly?
Have the rss under drive pulley on mine and love it
Made the steering slightly heavier which liked too ;-)
Didn't like that I had to take a dremmel to the engine to get it to fit but it was worth it
Hello Mike,
can you PM me the discount code please. I have my vehicle on jacks and currently working on some performance and maintenance items. Might as well install a pulley.
Hi Mike, can you please elaborate this? I do not understand. Or do you mean improved efficiency under moderate and higher, near redline rpms? Like on the track.
No offence. I myself have the RSS underdrive pulley installed. But people have to be aware that the underdrive pulley's main purpose is for when tracking the car.
For normal street use one need to be straightforward and honest. The underdrive pulley is detrimental for the cooling efficiency at the moment the M96/97 engine is needing it most!
At low/idle rpm the water pumping capacity of the waterpump is not efficient at all. With the underdrive pulley the water pump will rotate even less under these circumstances.
When coming to a standstill after a drive (which is most common in non-track conditions). the driving wind falls away, the thermostat is most probably not fully open and the water pump is not moving a lot of water. It is at these moments the engine still needs to get rid of a lot of heat. Haveing the underdrive pulley is not improving the cooling efficiency at this moment when it our engines needs it most. The probablilty of local hot spots increases and we all know what effect these have on the damage it can cause.
Silk, thank you for your input - That was a concern of mine, and the very reason why I never installed one, I do tracking events a few times a year, as both my 996's are my daily driver. Thanks again!
Hi Silk, I understand your concern. We initially developed this pulley over 10 years ago on our 986 Boxster Spec Car and a 996 converted race car. During this time we supplied parts to the Boxster Spec and several other series. We did our research and development on our race cars which had all cooling fans removed from the radiators. The cars never overheated nor did it have cooling issues, given we would typically do a cool down lap before leaving the track. Subsequently we tested the 601 Pulley on a host of street cars including 986, 996, 987, and 997 and experienced no cooling issues of any kind even during the hottest California summers. We have had no reported cooling or mechanical issues having sold thousands of the 601 UD Pulley.
I will update link, Old website, We transitioned to a much improved user friendly platform earlier this year! There is also a direct link to homepage in my signature below.
See direct Link to 601 Pulley and Belt:
http://roadsportsupply.com/search.php?search_query=601§ion=product
It reqires some minor grinding of the boss for clearance where the lock pin goes.
oops, sorry, thought I was replying to another thread. I can�t say whether the rss product requires case modification. Other brands do...
I would like a coupon code also..a few things of interest.
Would not mind some real world feedback from others on the pulley...the slower water pump rotation concerns me however.
Thanks
Mine has been on track in hot weather and driven daily(nice weather).
In traffic or highway, never an issue.
Make sure you check your belt tensioner and other pulleys, install new belt.
Nearly 15,000 miles on mine
Have had mine on for a few weeks. My butt dyno doesn't notice the difference. I installed a new OE water pump and low flow t stat at the same time so i have been watching the temps like a hawk. No noticeable difference in the Florida heat at all.
Butt dynos lose their measuring ability as the starting HP ratings increase. :-P
You're not going to notice a 20-hp increase on an engine with 300+hp as much as you would on a 200-hp car. (Not saying the pulley increases power by 20 hp)
If you can�t feel the improvement then what�s the point spending money on it? I can see this being useful for a dedicated race cars where the engine spends most of it�s life near redline and you want to keep the alternator and other accessory speeds down but nowhere else is this useful. BUT it will make your wallet lighter.
Less parasitic loss so more power to the transmission and beyond. Claims of 5hp from some vendors - not an increase in power from the engine, but more to the wheels. It is also supposed to prevent spinning the pump too fast causing seal damage on cars that are raced or driven at high rpms. These are just me repeating vendor claims. I have no way to prove any of it.
I suppose that is a personal choice. Some people want to maximize power to the wheels on the street too. $200 for 5 (alleged) horsepower is a pretty good $/hp ratio.
It's a good rule of thumb to take what a vendor claims and cut it in half and then hope that maybe you will actually see that once you install their product. BUT let's say you do see 5hp (at the flywheel, not the wheel) at near redline. I guarantee you will not feel that in the seat of the pants. 5hp at the flywheel is unnoticeable on a 300hp engine. It can also easily be just a standard deviation between tests and has nothing to do with the product. to me 5hp is pretty much statistically insignificant. You will get more performance gains if you just drive with your gas tank half empty all the time.
BACK IN STOCK!
RSS 996 Top Seller Lightweight Underdrive Crank Pulley # 601
Best Bang for the Buck upgrade for you Porsche!
Unleash extra power, improve cooling efficiency, avoid boiling the power steering fluid and achieve better throttle response with the # 601 Crankshaft Underdrive Pulley.
The RSS Lightweight High Strength Underdrive Pulley is made from 6061-T6 aluminum. Offers improved HP & TQ by reducing drag from the power steering pump, A/C, water pump and alternator which is a must for any street or track enthusiast Installation wrench included. Fits all Porsche models EXCEPT 2.9L 3.8L, DFI and Turbo/GT3. We recommend using the appropriate length
belt RSS # 6PK which can be purchased separately
.
http://roadsportsupply.com/search.ph...ection=product
My experience is that it allows the engine to "spool up" quicker - so it feels/is more responsive - throttle blibs are quick and "powerful" (probably not the right word but best I can do at the moment). As for a 5hp gain, I have no way to prove or disprove that claim but I generally default to less if anything is more realistic.
My butt dyno is extremely accurate. I calibrate it every morning. My test results indicate no changes. None at all. I don't regret buying it. But if your car is a street car like mine. It would say pass.
This is a source reference. Confirm exact model applicability in the original material.
