OVS AERO M8 Kit PG Clutching

[Turbo11T]

Specs on the sled.
09 hcr m8
153 powerclaw
OVS Aerocharger 53 series.

Looking for a good starting point. Only planning to run 7-8lbs of boost. He wants to ride in the trees.

He is new to turbos I am new to cat turbos. Hopefully you guys can point us in the right direction. Have a couple turbo helixes. A twisted on and a OVS one neither of which we know the angle on. The OVS one is not machined for reverse and he does not want to lose this option.

 

[Turbo11T]

Im sorry 8-10000ft as well.

 

[4nite]

Give OVS,Travis 801-940-7777, or Garr 801-745-3833 a call,they can steer you in the right direction.

 

[Turbo11T]

I have actually been working with twisted on this.

I got he reccomendations. Being new to cat turbos I am intrigued to why one the spring rate he told me.

180-310 primary spring.
79 gram weights

stock secondary spring
36-48 helix
shift assist
hard rollers.


All of these things he sells on his website. Like I said the spring rate for the primary spring seems high to me. 180 start rate seems ok. . probally pretty engagement but I think that we will like that and it will help the turbo spool before loading it. Now the finish rate of 310. . . That seems high. Seems as though the clutch would have a hard time squeezing the belt at that.

What are your guys thoughts. I am likely to go with twisteds setup as we have a few of his products on the sled now. I am just trying to learn so I can really help with tuning this sled out west. On the yamaha turbo I had we used the softest primary spring with a decent high engagement to get the turbo to spool before loading it. But I would think with the 310 finish that there may be alot of belt slip at full shift. I would think a lower finish rate more around that of a stock spring would work better. Maybe the spring rate works well because of the secondary setup.

Either way hoping to here some thoughts.

 

[Reese]

Take a look at the weights from the original kit. I belive they should be D&D turbo weights. Thet should have a slight flat spot just after initial engagement with extra weight at the tip. That is likely part of the reasoning behind the spring selection.

When in doubt call trav or gar...its their kit.