Good info Steve. I was talking about the spring. Amazingly enough at 80K my OEM comp looks near new - just have a little shutdown rattle etc. Hopefully it tightens up the pack a little.

 

TC cam and spoke/sprocket parts don't fit the M8. Not sure what you are trying to say..

 

OP has an M8 and asked about spring pack upgrade to lessen comp thrashing. Your reply to Steve Cole discussed the older engine models, not relevant to this discussion. Steve was saying you don't need more spring load when a quality comp ramp is used, his experience was with TTS comp ramp for power upgrades.

 

If you look at the sentence before my highlight, Steve was clearly talking about evolution of design.

 

But the point of the posts are what works today.

 

Everyone also needs to remember that HD themselves came out with a shim kit for the compensator as they found there loose tolerances were biting them in the *** again. You may want to look at the instructions they give with the shim kit and make sure things measure properly while you in checking and/or adding a spring to tighten them up. We have been adding an extra stock spring on the end to tighten them up with great success, but only do it as necessary. No need to put more pressure on it that's not needed in all cases.

 

Ok, but HD compensator ramp is junk too - a raw casting in a cyclic, high stress application. Members have shown these destroyed, idk if stock or only power uprates.

I guess the point is if a quality compensator ramp is substituted (TSS only?), the original spring pack is adequate.

Would be nice if somebody just got to the point of what an adequate design is for uprates instead of debating the past.

 

I'm an Old Dog (70) so when I find something that works well, I stop looking. If you keep adding pressure to the spring pac the next part in line is going to start failing, and those are the Stock spokes it rubs on. This is why I do not want to add any pressure if not necessary.

 

There is nothing wrong with the raw casting buy being cast. It's more of a design issue with how thin they made the trough on the cam.. I've not seen a TC cam break and it's the same material. Even on pumped up motors.

Going to a stronger non-cast one cure.

 

Yes, there is - in a tensile fatigue application. Wanna get into the S-N curves for materials?