My post has nothing to do with the spintron but, when you buy a typical Competition Cams cam you should know this: in my shop this is a very common occurrence. When assembling a engine this weekend it was time to clean and install the cam, we always check the run out, the 224/230 extreme energy cam had .007 run out, and make no mistake this is VERY common with these cams. So keep in mind when building a engine in the 2020s, you better check everything. Bottom line: some aftermarket manufactures could care less about your project.

 

Thanks Mark great info.
Do you get a replacement or can you straighten the cam?
Do you have a video on how you check cam run-out?

 

We have to straiten them ourselves as they are always bent. I rarely use a Comp cam in my shop, but they do have a few grinds I like. No videos of that, straitening a cam is way more tricky than straitening a crank.

 

Bernhard wrote:
Thanks Mark.
Is this across the comp line?
What cam manufacture do you use in your shop?

 

I've mainly noticed the cheaper line which would be the extreme energy series, there one cam in this series I've used a few times and its always bent. But most cams are bent to some degree, but .007 is too much for me. The Redlines are pretty strait from what I've seen, Bullet is usually acceptable.

 

Same story with my machinist - he checks every cam on his v-jig. If it's out, which almost all of them are, he takes it over to a lathe, chucks it up, gets a big hammer and a big chisel, and gives it a few good smacks. Quite entertaining to watch.

You can check pretty easily yourself. Just install the cam with some light oil on the bearings. If it rotates freely then you're OK. If it really drags or binds then it's bent enough to wipe out the bearings.

My uneducated guess is it has more to do with shipping than manufacture.

 

oh here comes the old line it bent because it was laid flat. In 60,50,40,30,20,10 seconds.

 

I find this a little scary.
I would have preferred to have seen a brass drift or chisel and the dial indicator retracted during straightening.
He did straighten it and it is his profession.
I wonder if once bent, if the camshaft might be more vulnerable to rebending.