Isky Red Zone Extreme bushed rollers in mine, .730" net lift, 700lbs open,......lash never changes. Idling at 1100 - 1200 for oil splash.
Oil is changed 2x per year, depending on the cars use; clean oil is supposed to be the mail thing to stay on top of with a bushed lifter. I have another near new set of the Isky Red Zones with needle rollers with little dyno use only - I might send them to Isky for conversion, I wonder if there is a contact for this, hmmm.
So far, so good
I asked them about converting mine from needle bearings to bushings a couple years ago and they said no problem. Costs around $700 IIRC.
Thanks Chip, who is the best contact at Isky to contact?
Ive done a few thousand kms on mine without issue. The Bullet roller Im using doesnt have super aggressive ramps/lobes', this is the key for a reliable mostly street, some strip mill.