Dasdubber wrote:I think we need to stump Dave with vw performance related questions though rather than just general vw questions.
Not that this will stump you Dave, but I know you are not overly fond of the K8 cam (there is a topic in another section you've already replied to) due to risk of valve train wear/harmonics.....looks like a K8 cam has been chosen and already dropped into the case for my turbo engine, can you elaborate on this a little?
I'm unsure of the origin (engle/cb performance etc as you mentioned there can be some differences in the k8 grind). Rockers will be Pauter 1.3, manton dual taper pushrods.....I'm keen to learn more!
Al
After seeing a number of customers with type one K8's have rocker arm, stud and pushrod failures, we had a K8 checked by our cam guy.
His simulation software showed that it had harmonic issues
that caused the failures and it was aggrivated by:
extra lash when warm,
rocker ratios that are large.
high rpm.
I can not recall if it was a Berg Equivalent,
or Engle genuine cam,
but our cam guy was able to reprofile the lobe to solve the problem.
We ordered a CB version of the K8, and it tested fine.
In the past I was not a real CB fan, but they have really done their homework of late, to supply the markets demands.
Pauter's would have been their own profile that had similar specs,
and their products are excellent in my opinion, (as you can tel by my purchases).
Provided the lash is kept tight(zero cold),
and the rocker ratio is kept on the low side of 1.4 you should be fine(if you like low power n/a
😂)
Of note was that extra tention did not solve the issue,
infact the damage was more severe, when the valvetrain lost control.
westi wrote:That's mad Alan.
