just heard from a friend that a guy that is not on any of our forums That we know of (crossfire,slk,mbworld,or benzworld.) has a c-32 with a aluminum SC pulley ,, it Exploded pieces went through the hood and through the thermostat housing,, ... hope he post somewhere so we can get some good info. jim

 

Sounds like you are an international buyer. I just recieved mine. I will be installing it very soon, just waiting to get the 100mm tensioner puilley from Needswings. Might as well do them both at the same time. This was from the pulley saver kit which contained the wrong size pulley. Nothing to do with the 62mm pulley. I will just say this, this pulley is well built, and I have no doubts of it's performance since it has already been tested for months and many miles....I would get one now, as it is limited as we speak. You never know what the future will bring on a new product. I will vouch for the maker and marketeer...

 

Yep...got mine delivered to Canada last night. Very well built, very similar to the OEM pulley .....but alot smaller

Can't wait to try it......in Spring 2013...... God willing that is.

 

Knowing you, you better install now....don't wait for 2013...lol....

 

My bet is the pulley flange with the rivets in it got fatigued and tore off in pieces.All the torque is transmitted through a thin band about 3mm (.12") thick. Three small rivets transmitting all that power.
Remember the pictures of the aluminum water pump pulleys a few years back.

It's also possible that the pulley itself it may have split into two parts as one part with the belt on it is unsupported for three grooves. The corner of the bearing pocket falls under the third groove from the back and there is not much meat there.

Aluminum is quick and easy (cheap) to machine, I see no benefits in its use in these situations.

 

A previous thread said the outside diameter (D) was 47mm. The internal diameter is the same as the OEM one and therefore (d) is 32mm. By my estimate the spacer washer shipped with this pulley is 5mm thick.

So we have 32mm x 47mm x 18mm. that would be Nachi #32BG04S3G-2DL available at bearingsdirect.com for $23.59.
or
NSK#32BD4718DUK available at Bearing Sourcefor $21.70


OEM SC pulley bearing.
32mm x 55mm x 23mm.
NSK #32BD45DU or 32BD45DUM, available at BearingSource for $15.40
or
Nachi #32BG05S1- 2DST
Available at bearingsdirect.com for $20.49 and

Amazon

Amazon

at $28.53

These are double row, angular contact ball bearings grease filled for auto air conditioners.

Idler and tension pulley bearings.
Good for 15,000 rpm.

#6303DU or #6303DDU
Available at bearing-source.com
Or
For #63032RS or 6303ZZ try bearingsdirect.com

Better bearings are from the SKF range. SKF 6303-2RSL and SKF 6303-2Z, good for 17,000rpm, these bearings are sealed on both sides.

The highest RPM rated bearings (22,000rpm) are sealed on one side, SKF 6303-Z or SKF 6303-RSL if you can find them. If a bearing is sealed on one side only it is easy to clean it and repack with a suitable grease at regular intervals to get extra life out of it, the grease gets thrown out during operation. Put the seal towards the front of the car and hope that not too much crap gets around the back. Using double sealed bearings is best.

These bearings are limited by the speed that the seal can withstand. An unsealed bearing (6303) can do 22,000rpm and the fastest sealed bearing have non contact seals.


These are all single row, deep groove ball bearings, grease filled.

 

Got to test out the pulley.. 7.7 was my best 1/8th mile. My previous best with the 65 was 7.8 only difference is I was running the tcu tune which helped a lot. I definetly need the belt wrap kit and will get that done this week, then install my manifolds and get some better times.

 

Informative blurb, when I went from my Code 3 65 mm to a 178 and Needswings manifolds my AFR's went from 11.8 at redline to 13. If you don't retune, at least run 100 at the track. I ran at 13 to 13.5 at the 1/2 mile and for a few weeks WITH 100 octane with no ill results. Expect to be around 13 AFR.

Les

 

I was running high octane last night and do plan on a re-tune from EC, just wanted to see what the difference was between the 65 and 62, hopefully the re-tune and larger pump will keep it from being lean on the top

 

The manifolds lean the mixture in the entire RPM range at WOT. I was seeing around 13 from 2500 rpm and up.

Les

 

SC pulley installed with PSK with updated 100mm pulleys all the way around. No belt slippage and man what a difference! Pulley looks really nice and is smooth as could be. Thanks Rudy and Rob

 

Glad everyone is enjoying them.

Take care

 

Mine has been updated to 100mm all round, it did take care of a bit of slip I heard.
Rob and Rudy are on my list of good guys.
John

 

I put off looking at a potential night mare of destruction under the rear for installing more horsepower instead.........

 

Rudy,
As discussed at the Dragon, I'm going to be very interested in the pulley here very soon. Also, I've gotten away with not having a PSK with the 65mm pulley, but I assume that I will probably need one with the 62.

 

For those that are now running this pulley, please post your impressions and detail if you have retuned for the pulley, and if you have had to overcome any AFR issues etc.

Thanks.

 

putting on the new fuel pump today, and then will be waiting to hear from EC for a retune...she leans at 5000....so no more runs until tune....

 

The pump will fatten it up, so you might not need a retune right away. I'd log a 3rd gear pull and let off if you see 13's on the gauge. If you don't see 13's or higher, finish the run and have your retune based on the datalog. Just food for thought.

 

What fuel pump did you choose for replacement Doc? This is on my to do list this winter.

 

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