Thanks Scott,
I like to know about all the new stuff on the market and you are a credible source.
I would add these to my next cam change if I were to change.
What's $160 vs the price of improved accuracy or maybe future failure?
I'm not an engineer but the concept looks like an improvement.
Al
That's what a lot of these companies count on Al, most folks aren't engineers but they look at a forged part next to the stock stuff for instance and just assume the forged stuff is better. Or a really big thing in the Harley world is stuff machined from billet. Really looks nice and solid, but in many cases it doesn't actually perform any better than the less expensive stock stuff. So looks aren't the deciding factor to an engineer, especially on a part that isn't normally visible. A engineer wants to see performance data that
proves a measureable benefit for the added cost. Advertising puffery doesn't count as measureable data, btw.
Has anyone actually documented a serious deficiency in the stock design that would lead to a need to upgrade? And what exactly is it about the Zipper's design that supposedly improves cam timing accuracy? That was an issue in the old days with the spring loaded tensioner's and the sloppy fit of the cam gears, but I haven't heard that story since Harley went to the current system. Do you suppose they've changed the size of the oil bleed orifice to add more force to the shoe and chain? If so, do you suppose the added force might accelerate wear of the shoe and/or the chain? Or is this claim just something pulled out of thin air because it sounds like a performance improvement? Everyone likes power increases, even if they are really imaginary.
Hopefully you get my point, which is there is a serious lack of real data to prove this part is actually needed, or that this part actually provides a measureable benefit. I would like to see the proof before I blindly accept claims in an ad, especially an ad from a company with a history of misleading claims.
Jerry