what would be the fastest setup ?

286 ramps ( stock ramps ) with 53/47 helix
or
287 ramps (more load mid range to top end ) with a 53/44 helix

Also i want to keep rpm low at trail riding speed, like 6000 rpm at 60 mph

Actually i have 286 ramps, 200-350 spring, clicker 2, 20 grams pin with 53/44 helix set at 18.5 lbs (A6) preload and my rpm is 8500 from 0-60 mph then move to 8900. Should be 8600 all the way.

Any idea ?

If you are happy with your lower speed numbers but it kreeps up at higher speed you can either lower your finsish number on your primary spring or raise your finish angle on your helix,or if you have thunder shift arms(do you??) you could leave your weights as is closest to your pivot and put more weight out at the tip(1 gram usually makes 100-200 rpm difference) Have you tried to lower your clickers(2 numbers should lower your max rpm)

At 8900 rpm you are loosing a ton of power. What kind of animal do you have and what mods do you have done.

Its a mach z with crank shop trail pipes, vforce 2,head cut/thicker base gasket, peak rpm is 8600.

I think im pretty close to a good setup. I just need to load it more from 60 mph to top speed and raise my rpm 200 from 0-60.

By moving my clicker from 2 to 3, i will raise my rpm at lower speed and i hope to bring the rpm down about 300-400 at high speed with the 287 ramps.

But my question is what is best for top speed ?

- less agressive ramps (286) and more agressive helix (53/47) or
- more agressive ramps (287) and less agressive helix (53/44)

according you get the peak rpm with both.

Thanks

either try a spring with a finish weight 300-320 or leave the spring alone and put another 2 or 3 grams of weight on the rollers.What is your pin mass now??? The stock were 23 grams,would be hard to find more weight there(if that is what is in there now) probably better to lower the spring

I have goodwin heavy adj. pin with 2 long screw.

Lower spring tension will also lower my rpm from 0-60 mph and im already 100 rpm under my peak rpm.

The only thing i can change to have effect only the 60+ mph is the second part of the helix and the mid to top part of the ramps to load the engine more.

KawaBoga, I would try this setup, which I think will give you your revs. quicker at lower speeds, then load the motor enough on top end to hold you around the 8600rpm (you may need to play with pin weight up or down depending how strong your motor is): prim.- the 200-350 spring, 287 ramps, clicker @ 3 or 4, pin weight try @ 20g (but play with pin weight to get your revs. @ #3 or #4 clickers), sec.- beige spring, 53/44 cam set @ 18-21lbs., and gearing around 25-44 or up (stock).
I've played with both the 286 and 287 ramps, and seemed to have better top end with the 287's (over 120mph on my speedo on ice lake with studded track) set @ #4 and #5 clickers. That was on my Jaws piped Mach 1, but I believe you'll have the bottom end torque to pull heavy pin weight at #3 and #4 with the 287's.
Good luck and let us know what you end up trying and how it works ! ;)

You can also keep your low end revs the same by not changing the lower number on the spring ie 170-320 excahange for 170-280 this would keep your low end the same (give or take) but lower your top operating range,or put in the heavier pins.

KawaBoga: Your tra set-up sounds about right,except click up to #3, try a straight 50 degree helix @ 18 lbs. Dino

Your question was a bit mind boggling, but dino has spoken, and thinking about it I`m thinkin dino`s on the right track.... there are other options though.. it`s pretty tough workin on a sled without really workin on it, this whole web thing, the real kicker in your situation is the top speed question and which if everything is shifting out ,its shifting out, (profound eh) but if you gotta doo it in say 1000 or 1500, 2000' etc it adds a new variable, I assume you want more mph in one of those distances, but if its say 1000` then acceleration also becomes a factor, so basically what I`m sayin is theat if your gonna run just for mph over a zillion feet you just have to shift out the clutches.