Rpm target for 800 pro

[rmscustom]

At what Rpm does the 800 pull the hardest at (stock)? I've heard some guys saying these motors like to be loaded heavy and will clutch for about 8000-8100. Would like to hear some opinions on this.

 

[himarker]

I'm shooting for 8100.

 

[Snodawg]

At what Rpm does the 800 pull the hardest at (stock)? I've heard some guys saying these motors like to be loaded heavy and will clutch for about 8000-8100. Would like to hear some opinions on this.

This is true!!!

MDS, MTX Belly Busters etc. work good.

 

[milo303]

Mines pulling 8050 with an hps can at altitude ( =

It's running pretty good I think

 

[blackie205]

i also find 8050-8150 under load is best i usually shoot for 8200 that way under huge load u will drop into that 8100-8 ish range but been running mds weights and find the rpm to be way smother and more bang on sled was hitting 8050 all day

 

[jrcactus]

I also am the same

i also find 8050-8150 under load is best i usually shoot for 8200 that way under huge load u will drop into that 8100-8 ish range but been running mds weights and find the rpm to be way smother and more bang on sled was hitting 8050 all day

 

[cbc24]

mines hitting 8400 At 1800ft and at 4000 ft 8200

 

[Big D rmk700]

Had my 11 pull right at 8250 which seemed to be spot on!
Thanks to Jeff

 

[Scott]

I'm told they ALL should HOLD at 8250.

 

[slimboydew2]

Question about clutching on my 2011 pro- I don't know much about clutching but i raced a buddy the other day who has a stock '12 and we were about equal; problem is, i have a PA head, Fastrax clutching, and a BMP can.

When you guys are talking about pulling at 8,100 or 8,250 RPM's or whatever, does that just mean the max RPM's you are hitting when pinned? As long as the belt sits on the secondary at the right height when stopped and the track barely creeps when the sled is suspended then theres not much else to do right? Any insight would be helpful as I know the proper clutching is VERY important.

 

[Scott]

Question about clutching on my 2011 pro- I don't know much about clutching but i raced a buddy the other day who has a stock '12 and we were about equal; problem is, i have a PA head, Fastrax clutching, and a BMP can.

When you guys are talking about pulling at 8,100 or 8,250 RPM's or whatever, does that just mean the max RPM's you are hitting when pinned? As long as the belt sits on the secondary at the right height when stopped and the track barely creeps when the sled is suspended then theres not much else to do right? Any insight would be helpful as I know the proper clutching is VERY important.

Yes and no.
THAT is a proper way to START, but then it's the springs, helix and weights that make the rest of the difference.

 

[el king cat 900]

152 hp at 8200 rpm on dyno !!!

 

[R_8_N]

Not sure why you are bothering with worrying on how it is racing your buddy across a lake .....unless that's why you got a pa head and Fastrax clutching. Tune it on a hill and you should see a min of 8200 all day with any kind of load. If you're set right to get your rpms on the hill you'll probably be closer to 8400 when ya go back to a lake to race your buddy which who cares.....its a lake....

 

[Stewy]

152 hp at 8200 rpm on dyno !!!

Who's dyno ?

 

[slimboydew2]

I don't care about the racing. Just making a point that I thought it would pull a little harder. I don't know anything about adjusting clutches so just trying to learn something.

 

[R_8_N]

I run a full porting and clutching package from fastrax. Curts never done Mr wrong when suggesting which direction to go. There is several ways to achieve the goal. I suggest ya pick someone ya trust and listen to them about how to clutch your Sled. You running mtx weights? You could lighten them up....drop your finish rate in primary spring...change helix. The forum is good to learn how this stuff works but you would go broke listening to everyone trying different setups.

 

[TheHardWay]

Mines pulling 8050 with an hps can at altitude ( =

It's running pretty good I think

What elevation are you running at?

 

[Scott]

I run a full porting and clutching package from fastrax. Curts never done Mr wrong when suggesting which direction to go. There is several ways to achieve the goal. I suggest ya pick someone ya trust and listen to them about how to clutch your Sled. You running mtx weights? You could lighten them up....drop your finish rate in primary spring...change helix. The forum is good to learn how this stuff works but you would go broke listening to everyone trying different setups.

That's a big "no schitt" on that one. A guy could go blind trying to learn clutching science.

It's a black science.

I'd START by reading Olav Aean's clutch tuning manual.

Then talk to turbotater or someone like that who has been tuning sleds for decades.

 

[slimboydew2]

I bought the sled used but not sure which weights they are. I do know it has the SLP MTX weights though. I run 3,000 to 6,500 feet typically.

 

[Scott]

Just remember they have to get somewhere around 7 or 8 hours on the hour meter before they get past the break-in chip. Then they open up and run at regular timing/fuel, etc.

Might have to put fresh plugs in at about 170 or 200 miles.