I was reading up on the Cosworth cams for the Evo IX and I stumbled across a few threads where people reported the exhaust cam does not fit properly and it may need to be filed (!) to fit- I want to make sure before making the purchase that there are NO fitment issues and NO filing/modifications required to install them properly... Also, I may not be able to afford the valve springs and retainers so is there a downside to not running them besides not being able to rev as high? BTW, here is what I read about the fitment issues with the Cossie cams:
Has anyone run into the same problem with Cosworth Evo 9 cam shafts?

"I ordered these cams from www.vividracing.com... below is a copy of an e-mail I sent them addressing the problem.

Vivid,

The Cosworth Evo 9 exhaust cam I ordered was incorrectly manufactured. On Friday 5 January, I had Speed Element in Fremont, CA try to install both the exhaust and intake cam. The intake cam fits perfectly. However, the “key” end (slots on the end of the cam shaft) did not align correctly. My installer called Ken at Cosworth. Ken suggested filling down the exhaust cam to make it fix. The installer and I both agreed this was not a good method to “make” the exhaust cam fit. Not only was the exhaust cam I ordered from you incorrectly manufactured, but the exhaust cams of the 10 sets of Cosworth Evo 9 cams shafts that Speed Element ordered were also misaligned. Therefore I must believe that the last batch that Cosworth manufactured is all bad.

Right now, I have the Cosworth intake cam and the stock exhaust cam installed in my Evo. I’m already out $300 for a job only being half completed.

1) Have you received similar notices from other customers who purchased these same set of cams? If not, I highly suggest you contact them and let them know of the problem. I cannot believe that no one besides me has encountered the same problem. I am very disappointed that no one from Vivid contacted me prior to me trying to have these cams installed and let me know of this issue. I’m hope you can understand my frustration of wasting a full day and several hundred dollars only to have the intake cam installed....

Thanks all... "

 

wtf does this have to do with work's??? i dont understand how people can get so lost.

 

WTF is your problem? What this has to do with works is they are a Cosworth distributor and they would be able to clear the air as to whether or not this is true- they are also who has done my ECU flash and who I plan on buying my Cosworth cams from, so I want to know beforehand FROM THEM that there will be NO fitment issues. So, unless you have something worthwhile to contribute to this thread u shouldnt comment.

 

I know I wanna know if there are any issues with these cams before I fork out the cash'ola, nice research DJ Brett B

 

Found out GOOD NEWS from Works!!! the cams with fitment issues were just a bad batch, and Works never received any of that batch!!! I just ordered a set from them today
As a side note, i dont know how many companys ended up with the bad batch, or if it was just vividracing.com... but just be safe u can go thru Works Thanks Pete for your help!!!!

 

nope i have had my cams from works since the day they came out with no prob.'s

 

This is correct. There was an isolated batch that was incorrectly machined. However, the cams that we have received have not been affected as they were not part of this batch. Cosworth acknowledged the issue and contacted all of their dealers to warn them of the issue and offer replacements

 

they sell them... might be nice to know that they've already checked and or fixed them.

 

we've installed two set of COS' at our dealership now and both were perfect. i think those that didnt fit where just a bad batch outta cosworth.