Roller X lifters?

[itsafatboy]

I dont know if you have gotton any feedback on theese lifters but i ordered a set of the hydrolic models, i called and talked with the owner and he said i will like them i just hope they have good hydrolics and are not to noisey. I have a 116" 10.8 comp mackie 598 cams , feuling cam plate, and pump.

I just purchased your lmr002 spring , should i use the lmr004 instead?

he said it did not need the extra pressure

do you know what the preload should be set at by chance? he was talking about using just zero lash setting no preload but seems that would be one noisey setup. his reasoning being something with harmonics of things above 6000 rpm , well i wont have to worry about that "B" motor and dont see 6000

he mentioned the lifter has .055 travel so that means i would get in the middle of that but with enginge growth will that work?. sure hope i just did not through 250.00 away.

[Mike]

So far the Roller X's we've used have been solids and are working very well. With .055 travel I would set the pushrods at .035 down giving .020 travel to bottom for a cold motor. .035 should be enough to account for warm growth. We have been using the LMR-004 (30%) but also with the Fueling pump (which you have) to make sure scavenging is adequate and that idle oil pressure is enough to keep the roller from breaking through the oil film. This is an experiment at this time and may not be needed. With solids, oil may escape from under the pushrod where it contacts the lifter with a warm motor but with hydraulics this contact should be maintained and again the 15% (LMR-002) spring may be OK. The LMR-004 may cause other issues in the motor like bearing skate (with cold accelerations), more carryover in the breathers and wetsumping (unless the cases have been modified, we do these mods. when they are apart for other motor work). The harmonics could be spring surge and pushrod flex causing the pushrod to come off contact with the lifter. The reasoning could be that since the pushrod will not stay on the lifter anyway, then preload is not needed, just zero lash. I would not agree and would go with the above recommendation.
Regards, Mike