How high is too high for clutch engagement,and what's up with the bang on engagement?
I finally loaded my 09 M8 in the back of my truck. This is the first time I have moved the sled since I had the SLP Performance Edition kit done. I noticed the sled didn't want to move when given throttle. With the stock Yellow/white 122/285 Cat spring last year the sled would engage at ?? RPM (I can't remember) but, clutch engagement was no where near where mine is now. The sled now starts to move at 4,600 RPM.
SLP recommends their Green/Yellow as their primary spring of choice for their Performance Edition Kit regardless of elevation. It's a 160/310 spring.
Now, in my mind 4,600 is WAY too high of an engagement speed but, now my sled has the SLPs MTX weights too.
So.........maybe they have to rev the engine that high to ensure the engine doesn't bog with the very aggressive profile of the MTX weights?
I have a 120/340 spring that I have never tried. I would guess I should try a 120/310 first (if my shift speed RPM is within specs) but, I sure like the idea of the lower engagement and high total force of the 120/340 so I can add more weight to my clutch weights (load the motor).
I'm thinking the Arctic Gold spring is sounding good to me. I hate to dig a hole when the clutch engages yet, that's exactly what it looks like I will be doing tomorrow.
What do you guys think?
I finally loaded my 09 M8 in the back of my truck. This is the first time I have moved the sled since I had the SLP Performance Edition kit done. I noticed the sled didn't want to move when given throttle. With the stock Yellow/white 122/285 Cat spring last year the sled would engage at ?? RPM (I can't remember) but, clutch engagement was no where near where mine is now. The sled now starts to move at 4,600 RPM.
SLP recommends their Green/Yellow as their primary spring of choice for their Performance Edition Kit regardless of elevation. It's a 160/310 spring.
Now, in my mind 4,600 is WAY too high of an engagement speed but, now my sled has the SLPs MTX weights too.
So.........maybe they have to rev the engine that high to ensure the engine doesn't bog with the very aggressive profile of the MTX weights?
I have a 120/340 spring that I have never tried. I would guess I should try a 120/310 first (if my shift speed RPM is within specs) but, I sure like the idea of the lower engagement and high total force of the 120/340 so I can add more weight to my clutch weights (load the motor).
I'm thinking the Arctic Gold spring is sounding good to me. I hate to dig a hole when the clutch engages yet, that's exactly what it looks like I will be doing tomorrow.
What do you guys think?
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