Please elaborate...What do you mean by a few issues? You cant say something like this in a thread w/out explaining yourself...???

 

I recently went to a different turbo setup but before I did I was running Cosworth M2's on my stock 05 VIII turbo. Prior to those cams I was running HKS 272's. With the HKS's I was dyno'd at 334whp and 308wtq on DTM's Mustang dyno. When I put the M2's in I knocked .1 seconds off my average 0-60 time. Although I never retuned or redyno'd after the M2 install the butt dyno felt good! LOL I was told at the track that I was outrunning cars that dyno'd over 375whp on a local dynojet. Not sure the setup or numbers on that dyno. I've never been a dyno number comparison person, I just like to go back to the same dyno every time to see what gains or loses where occurring.

Josh

 

from what i understand GSC definitely makes great products and i still think i might even go with this cam its all going to depend on how well the cams perform and which will make a better DD setup. not trying to to start anything or say to stay away but it's nice to have all the info you can before making a decision.

https://www.evolutionm.net/forums/6704540-post25.html

full thread
https://www.evolutionm.net/forums/ev...mage-pics.html

 

That pic shows a chunk missing. That isnt the cam but rather something hitting the cam or failing. A divot only occurs with interference damage. If it had been the lobe failing it will wear smooth but irregular. The only time I have seen divot damage like that where it was a cam is in pushrod motors.

 

I also happened to notice that was not a set of current GSC cams either. Billet core manufacturers have since changed in the 4 years since those were made.

 

^ exactly my thoughts...

 

what are your thoughts on the first link? that was a recent set of cams. i still dont know the full details on it but its always worth checking out especially since the guy who had those cams no has to replace his motor and hood.

 

I have talked with all the parties involved in that one. There is no clear reason for failure, and the only way to replicate the results was to put a cam in a vice and hit it with a lump hammer. I think thats a fluke though. We have beat on GSC products as much or more than most, and havent had any failures of any kind. I have personally run 2 sets, Luke has his, the Dragcar has S3's (it will be getting an updated set), Luke is going to be recieving an updated set, I have many friends and customers running them without issue.

Originally I had thought oil starvation but there were no heat lines, then I thought over tightened bolt (or insufficiently threaded cam), but as I said there was no clear reason for the point of failure but I have no qualms about suggesting them. When you race sometimes bad things happen and unfortunately that gent seemed to have his bad luck that day. Heaven knows I have had mine.

 

i have been following this thread and others like it for awhile about this s1 vs s2 argument and i still havn't came to a conclusion about which cams to get. On a ix, do you think the s1s will make more torque earlier than the s2s.

 

thats why i am still considering those cams. i loved the way they produce power and apparently are a good DD cam as well. its hard to make a decision and thats why i try to research everything i decide to upgrade on my car.
since you have alot of experience with these cams, how are the S2's as on everyday driving and stuff? my car is a DD but i would like to start doing some auto-x or road racing type events and i do go to the drag stip every once and awhile. i want a cam that is not going to hurt my low end and improve the mid and high end as well. i dont want a cam that will give me problems and that will activate the CEL.

 

On a IX I really dont think there is any choice but the S2. The only thing that would make me think otherwise is not having enough for the valvesprings at the same time. Mine idle invisibly to be honest. I did notice a slight drop in economy when I was still on gas, but even then I was getting 24-25mpg.

 

john - what valvetrain upgrades would you suggest if i wanted to run the s2s, and also what would be the bare minimum upgrade? just springs? i was thinking of doing it all at once, valvesprins retainers, locaters and locks but i don't know if all of that is necessary.

 

S2s and FP Beehives work very well for me and I have sold many sets. The stock retainers are very light and work very well. The FP beehives are rated to mid 8k for rpm with aggressive cams and I have no doubt they could do more, though I dont suggest it since I was told they are rated to 8500 or so and havent pushed them personally.

 

not bad,

arent the M2's close to the specs of the S2's? the M2's are 272's with 11mm lift for in/ex as far as the S2 they are at 274 11.2mm intake and 272 with 11mm lift for the exhaust. now they was a rumor of a new grind for the S2's it was going to be something like 11.4 intake and 11.2 exhaust and i think the duration was changing to if i remember correctly. as anyone seen those cams around?

 

I dont think it has been updated on the website, but many months ago, Greg said that they were giving the S2's for the VIII a face lift, so I assume it has been done, but Idk 100% for sure, Aaron might be able to shed some better light on that.