Top speed 900rmk with blue /pink spring

[Hjalti_GTO]

Hi guys
I got 05 900Rmk 166" with the slp blue/pink spring
Its realy fast up to 40mph but all speed over 50mph it gets realy loud and gets high rpm but not much happends.

The fastest i have got is 61mph (GPS-poven)
Is this normal ?

 

[94fordguy]

Hi guys
I got 05 900Rmk 166" with the slp blue/pink spring
Its realy fast up to 40mph but all speed over 50mph it gets realy loud and gets high rpm but not much happends.

The fastest i have got is 61mph (GPS-poven)
Is this normal ?

Primary clutch setup will have little to do with top speed other than determining your final RPM. What does your secondary setup look like and what gearing are you running?

With my setup:

Black/Grn
10-70s

stock equivalent red/black secondary spring
stock helix (don't remember the numbers)

18/39 gears

I have maxed the sled out at 78 MPH