Its my video. Thats my 66 autocross car, 95hp, Powerglide, in low gear for a short autocross (I never autocross in Drive). It was running old stock transmission mounts, and a Clarks HD Engine mount.
Eric P.
DeWitt, IA
Sort of, for a minute or 2, then I realized that they would wear out way quick! The more they wear the worse the belt control. The other thing, even if the bearings do seize on this, they become "replaceable rubbing blocks", except that being the rollers are made from stainless steel, can handle that for a long time, and can easily be trued up. My set has gone 3000 miles and theres nothing wrong with them, except I had to take the engine out and replace the pistons, cylinders and some other stuff so cant do any testing for awhile. The rollers are currently set-up to only allow .012" of belt movement, and one of the tester's has gone a few hundred miles on it, with a super tight belt, and really rev's the hell out of it! He told me the other day he was on the freeway for 15-20 minutes and revs between 4000 and 6500 and simply isnt seeing any roller problems that he had before. He's trying to kill that thing or pop a belt!! Showing the benefits of oiling the bearings properly and having a good inner bearing race support and bearings that are meant for that kind of speed and load.davemotohead wrote: ↑Mon Mar 04, 2024 1:43 pm Kevin, Have you thought about using replaceable rubbing blocks instead of rollers? Might solve the bearing problem?
Just kind of roughing it out, at 6400 rpm, the rollers should be in the neighborhood of 55000 rpm. They are supposed to be able to handle 7000 engine rpm, as this is roughly 60000 rpm. Theres some additional margin with these bearings in that they can handle more than that if oiled which they are. With roller bearings, the speed rating is super important, but also its the loads at that speed that are even more important. Fortunately, the rollers only have to carry a tiny fraction of the load that the idler bearing does relative to the actual total loads they are able to support!Wittsend wrote: ↑Thu Apr 11, 2024 12:35 pm It is good to see that the roller guide is progressing with positive results. Curious, at the stated 6,400 RPM has anyone calculated how many RPM the roller is turning at? It is a small fraction of the crank pulley and must be spinning at some, 5 maybe 6 digit RPM!
Yes they are! I have one for sale immediately, and wont have more inventory for a couple of months. They are 275.00 + shipping
Right on Tom!! Have you tried speed shifting yet?? supposedly this is when the sh!t REALLY hits the fantoms73novass wrote: ↑Tue Apr 23, 2024 12:36 pm Really banged the gears and the belt is rock solid!! Hit rev limiter 6k a few times. I would have no doubt had issues before.
Yup as quick as I could.Nashfan wrote: ↑Tue Apr 23, 2024 1:57 pmRight on Tom!! Have you tried speed shifting yet?? supposedly this is when the sh!t REALLY hits the fantoms73novass wrote: ↑Tue Apr 23, 2024 12:36 pm Really banged the gears and the belt is rock solid!! Hit rev limiter 6k a few times. I would have no doubt had issues before.