61.9 EC Pulley is referred to as a 61mm pulley. An aluminum pulley. 62mm pulley is the referred to as the Karmann pulley. So, if we are only talking about the aluminum 61.9, then refer to it, as it gets confusing. If the Karmann starts to fail in multitudes, I would like to know, but I already know about the EC failures and I think that is what we are referring to here. If I am wrong, point me in the right direction. I know most who purchased and are running the Karmann pulleys. Only Bob, Red Dog has acknowledged his failure to date.


I just saw you post again Dave. PM me who has failed. I will be in contact with the manufacturer in this case. I don't need a shrapnel flying thru the hood.

 

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I heard Lenin also had a pulley failure. What was he running?

 

Lenin posted :

 

Hello everyone,

Trying to clear the air a little. . . I'm not sure what pulley that is pictured in this post that broke into two pieces but I don't think it's one of the Karmen 62mm pulleys.

As you probably know, the backing plate on my Karmen 62mm pulley grenaded. Also member LENIN reported an identical failure on his Karmen 62mm pulley (see this thread https://www.crossfireforum.org/forum...tml#post806369 post #317 and post #333). As far as I know those are the ONLY two Karmen 62mm pulley failures. I'm still waiting for Khang Vo to rebuild my pulley and return it. He didn't comment on the reason for the backing plate failure but says the the rebuilt pulley will be "better".

 

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I beg to differ with you Dave. While the forum is an excellent source it is not always user friendly due to arrogant know it all's who think they and they alone know everything. Facebook is a "Social Site" more than technical and the Groups members are encouraged to join here as well as C.I.C.C.I.
If you hate it so much, why are you always trolling? Why not just join and impart you knowledge there as well. There is no doubt that you and many others here are an amazing resource for knowledge as were the others in the past who posted on the forum their solutions to issues related to our fun but sometimes finicky cars. After all we are all on both sites for the same reason...

 

180 if all you can do is go on a Facebook site and come back here and ***** on how stupid we are I suggest you join the group and share your arrogant knowledge instead of hiding here and putting us down. Those on Facebook go for the social aspect and when need they come here...BUT,MANY NO LONGER WISH to come here because of being made to feel like fools or be talked to in an arrogant and condescending attitude that we are still seeing here today

 

Three, count them, three failed Karmen pulleys. Lenin and RED DOG both lost the backing plate, Brett Thomas had the snapped pulley pictured. Learn to shut your mouth onehundred80 before your legacy becomes that of the internet @$$wipe. You want to inform people?? Yeah right, you just want to make it look like you know more than you do. Good luck playing I spy on the Facebook crowd....guess you'll be left without anything to talk about.

 

I posted on Facebook asking for clarification from the owner of the failed pulley as to exactly where he bought his pulley . . . I'll post back here when I get a response . . .

A couple of more things to digest in the meantime . . . Rudy developed what he called the Karmen (his spelling) 62mm supercharger pulley. His design utilized a smaller bearing (smaller than what had been used in previous undersize pulley designs) that allowed for adequate thickness in the pulley wall structure around the bearing. Also, Rudy's design was a hardened steel pulley (not aluminum). We need to be careful in looking at reports of failed pulleys to be sure we know exactly which pulley failure is being reported.

Another piece of the puzzle that I don't yet have all the information about . . . Both myself and LENIN bought our pulleys directly from Khang Vo (the manufacturer who made Rudy's pulleys) after the group buy that Rudy spearheaded was over and done. Our pulleys were "left overs" that Khang Vo still had and made available for sale. Some clues lead me to believe there were two distinct "batches" of these pulleys that were manufactured. I need to research this area a bit more but I think Rudy rejected the first batch for some reason and only moved forward to distribute "his" pulley when he received the second batch from Khang Vo. If that is true, then I'm now suspecting that my pulley and the one LENIN bought might have been ones from the original manufacturing batch. I'm going to ask Khang Vo about this and will post more information about what he reveals after I complete that additional research . . .

 

Well not to get into another pissing match with those on the FACEBOOK side, which I will NOT continue to visit, and arrogance goes both ways, btw. MY pulley purchased directly from Rudy has performed well to this point. But all this talk and conjecture has me worried and I continue to inspect mine. Rudy hasn't heard of any other failures, and he is busy with his new life and wife, so I will not bug him about it. I did ask for more info on the builder from him, but that's it. Again, 4000+ plus miles and a lot of hard pulls, but I will keep an eye on it. Dave has his faults, but I believe in this case he is trying to just warn people about pushing the limits by using these pulleys and those of us that do know we can have failures. It is just good to know and share the experiences when we do. But share them here, I will never participate on Facebook, as I found the arrogance worse there then when Dave and I go at it here, which btw is just that. I have met Dave and I like his old ***, and we have a little fun pushing each others buttons from time to time. I have met Dave in person, and would help Dave in a heart beat if he needed it. Thanks Bob for clearing things up a bit.

 

The owner of the failed pulley referenced in this post responded to my inquiry on Facebook . . .

Brett C. Thomas 11:03am Sep 24 I bought it from grip grip on the forum. It measures in at 61.9mm

As I suspected, this failed pulley was a Eurocharged 61.9mm (aluminum) pulley . . . NOT one of the Karmen 62mm (hardened steel) supercharger pulleys.

I'm waiting for responses from both Rudy and from Khang Vo about my thoughts on their having been two separate batches of the Karmen 62mm pulleys and if so, what the differences might have been in those two batches. Will post further when I know more . . .

Not that it will make my situation any less painful but it's possible that there have been NO failures of the pulleys distributed by Rudy in the group buy. I'll know more when I get responses . . .

 

Red Dog Bob, what are you doing about your SC clutch friction plate?

 

Check my post after yours, he bought it from grip grip who bought off one of the group buy folks that got a 62. And they're aluminum, not steel.

 

As for now, I cleaned those banana slots on the face of the supercharger electro magnet. Not sure what was in those slots but I THINK it was debris materials from the slipping supercharger pulley clutch face that became heat fused into the slots. I have a stock OEM supercharger pulley mounted on the car now and it seems to be working perfectly.

 

Hi Chuk,

Yes I saw your post. I think we need to ask Grip Grip exactly what pulley he sold to Brett. Are you saying that the Karmen 62mm pulley is aluminum and not hardened steel? I don't have mine here right now to check it. IMHO it could be a steel alloy material that might not react to a conventional magnet test?? I will ask Khang Vo. Maybe also someone more knowledgeable about the material used to make the grooved pulley part on the 62mm Karmen pulleys can chime in.

In the meantime also I'm waiting from more definitive information hoping to come directly from Rudy so maybe he can clear that up . . .

 

Hardened steel is still magnetic, so that answers that.

 

It was a 61.9mm that I bought new from Eurocharged a few months earlier.

 

THANKS for responding and clearing that up . . .

 

Thanks for the clarification. Brett was under the impression it was 62 when he spoke to me, but wasn't sure since it was a second hand purchase. Guess it's only the backing plate failing. Still a 10% failure rate...not great to hear.