Warp Speed wrote:And for the guys preaching a rev kit as the holy grail of fixes, while they may reduce the rapid speed change during separation, they do very little to reduce the shock, as there is still separation/lash in the system, and the resulting shock loads are still transmitted to the needle bearing via the axle.
The only way to really reduce it, or soften the blow, is to eliminate the system separation all together. IE hydraulic lifters.....
Warp, a rev kit is only the holy grail of keeping the roller at lobe speed with an SR until an rpm is reached that allows the lifter mass to overcome the rev kit spring force. My point with the rev kit (should be renamed SR Street Kit for this purpose) is to keep that wheel on the lobe at idle and lower rpms, and it does that quite well.
Any shock loads that the valvetrain sees are of course felt by every moving part no matter what and the shock loads, at least the largest not considering valve float are only as harsh as the lash ramps allow.
Possibly the best of both worlds at least for a streeter would be a short travel hydro lifter on an SR lobe that has been tweeked to allow for the difference in said lifters characteristics.
May as well just run a big girly roller!