Did you keep the motor idle rpm at the 1800rpm required to make it oil & live ? Is this a boat motor ? or top fuel ?:lolhit:

I dont think its the name brand ,something else is causing the failure.Ive had good luck with there lifters over the years,alot of endurance running.Had a set of race light weight taps with 10k miles and had about .100 slack in the roller,sent them back and they said they havent had any with that kind of miliage and sent me a new set free,



I would give Bob a call,I would even send him the lifters for analysis,Morrell,He's is pretty up to date with the high end lifters and has a lot of experance ,It would be worth you while to call him!
http://www.marinekineticsonline.com/services.html

At speed talk there is a discussion of solid roller failures. All related to the needle's. The recommend was the Isky EZX bushing type to prevent these type of failures. Not sure it that helps.

Isky EZX

We had problems back in the 90s not running enough spring pressure to follow the ramps we were running, it would beat the lifters apart. It definately helped when Crower added the Hippo option, and the severe duty lifter. You might want to check the springs.

i did blow a lower drive my last day out at the end of last season and i had to idle in on the 1 motor and it was at least 2 hours of it being at idle, i wonder if that could have caused this lifter problem?? thoughts??

790# open couldn't hurt anything ?

As long as you had oil pressure, the 66291-H lifter would be putting oil to the face of the cam at all RPM. We run more than 790 lb springs without a problem. Spend hours towing skiers, tubers, cruising. There's always the possibility of a bad set of lifters, but I would be checking everything else. What oil do you run ?

No question go to the .903 lifters no matter which brand.That gets you a slightly larger roller bearing in the wheel and the chance to true up your lifter bores. You also need a cam expert to look at your cam needs from an endurance standpoint. A drag race profile may just be too violent of a motion for the lifter to live very long. Bob Madera should be able to steer you in the right direction.

Fixx
 

are you tunning restrictors? not enough oil to the top end could be causing the problem.

running 50w mobile 1.