This scenario (2 up, long uphill grades and passing) isn’t really in either cam’s wheelhouse. Granted there are many variables, but let’s face it, at the end of the day these are tractor cams.

I run a 509. Fun, but it is what it is. I’m ok with it.

 

In what way is it not in their wheelhouse? 80km/h is approximately 50mph, which is just over 2000rpm in 5th gear. I'm looking for something that's going to run from there to around 80 mph (130 km/h) or about 3500 rpm if I remember correctly. Looking at the manufacturer websites along with the recommendations on here, it looks like that's exactly what these are made for or again, am I missing something?

 

My point is, these are bolt-in cams designed for stock engines, and optimize compression lower in the RPM range.

To make upgrade pulling power with a loaded bike, a bolt in cam by itself will struggle unless other components are matched to it, and even then you give up efficiency at other loads and speeds. Everything is a trade-off. Can they be made to work? Sure, but are they the best bang for the buck? Maybe, I'll let the pros take it from here, I'm just some schmo who turns wrenches in his garage, sometimes in the right direction.

If I were looking to have a heavy 88 inch bike pull hard up long grades and pass quick, I'd be asking them about bigger inch builds, and probably not looking at either of these cams.

Your mileage may vary.

 

No experience with the 21's but I have run the 509 cams in a bagger (1 up). 509's are ok but I would take the Andrews 26 in a stock 88" bagger over a 509 any day.

 

Andrews 21's hit hard. I put them in my Fatboy 95" build with street ported heads a few years ago, and that thing hauls the mail. It has torque every where and pulls to rev limiter.

 

I just put Andrew's TW21s in an 05 Springer Classic. There's noticeably more pull 1-up or 2-up. I'm real happy with them.