Vintage ISKY rev kit plate
- Thread starter 409N
- Start date
I have a pair of those, any idea how they mount ??
The plate would fit up against the bottom of the cylinder head, then there would be springs that would be placed between them and the lifter.
Used with a roller cam to keep the lifter from leaving the lob on the cam.
Used with a roller cam to keep the lifter from leaving the lob on the cam.
Does that mean you would have to eliminate the link bars ......????
No the lifter would have a seat at the top of it for the spring above the link bar.
Modern cam and valve spring advances have made them pretty much obsolete .They have been beneficial in hyd.roller applications but more and more the thinking seems to be that for up to 62-6300 repetedly,with very careful parts selection the hyd.roller is fine.If you're going for more rpm than that replace the hyd. parts with lighter mechanical roller lifters on the same cam.You'd also have the benefits of using very tight valve lash settings.
Any idea of what the springs look like and what sort of tension. When I bought my FH code 348 11 or 12 years ago it came all machined, but also with it came an Isky cam (RR 360), roller lifters and a pair of these plates. I can't remember any springs coming with the plate.
Now a dumb question, what is the real difference between a Hydraulic roller and a solid roller cam,
Now a dumb question, what is the real difference between a Hydraulic roller and a solid roller cam,
The major difference is the weight.The mechanical stuff is lighter and doesn't have the cushion or spring effect that the hyd.stuff does.As to the rev kit stuff,the springs were small and light,usually seated with a seat pressure in the 50-75 pound range.The seated on a "button"as the cam people that sits on top of the roller lifter and acts as a spring seat for the spring.There are new parts availeable if you really want to go there.
We ran one with a 505C isky and ran 110 seat pressure spring. Engine saw 7000 often. That was in the sample block. Can’t get the photo to load of the system mounted. Look up thread called confused about date codes and size. Picture of it there.
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They came out when the tough was to keep a solid roller lifter in contact with the cam lobe at high RPM. It can be used to spread the load on the valve train but there are more parts that can fail in the mix and hard to keep an eye on. Modern parts have made them obsolete for the most part.
