Sorry nub, I just can't believe it. Whoever is telling you to NOT have the base circle lowered is full of BS.
I know at least 4 local guys here who have done what I did. It works.
My brand new Lunati just came last week ground on a 1.040 base, and with Mikes lifters all is good. Without the lowered base and Mikes lifters, it would be a disaster.
What year is your block again?
Ah crap, nub. forgot you were doing hydraulic. My bad..... couldn't you use a solid lifter for a hyd. cam? Roller, that is. I heard you can, but not visa versa....
Yeah.. I'm pretty sure he said I could keep my current hydraulic roller cam and just use it with solid roller lifters instead. Of course to go solid I'll also need to get adjustable rocker arms and new springs/valve train components so it's def going to be more expensive.
What kind of valve train did you pair with the MRL's?
Hey Sledger, how do you like your roller lifter setup? Is it worth the hassle in your opinion?
Yeah.. I'm pretty sure he said I could keep my current hydraulic roller cam and just use it with solid roller lifters instead. Of course to go solid I'll also need to get adjustable rocker arms and new springs/valve train components so it's def going to be more expensive.
What kind of valve train did you pair with the MRL's?
You were going to need adjustable rockers even with a hydraulic roller as the stamped rockers won't take much spring with out punching the pr through them. Also I doubt there will be much if any difference in springs need to put solids on it instead of hydraulics.
Right on....... I'm using Hughes rockers and shafts, with the MRL solids. Absolutely perfect friggin geometry and "scrub pattern". They are a little expensive but nowhere near T&D or Jessel. I've been running them for a long time. The last set I had were the 1.5 ratio. I ran em for 4 years and sold them to a buddy for his drag car. He's running almost 700lbs open pressure and has somewhere north of 200 passes on em. Amazing.
Does anyone here have experience with running hydraulic roller cams in a small block Mopar motor?
My 340 LA block is currently being rebuilt at my local hot rod shop. I dropped by the other day to check on things and they showed me a very strange problem they are trying to solve with my new hyd roller lifters and comp hydraulic roller cam (20-812-9).
It appears that the tops of the lifter bore castings on my block are fairly inconsistent. Some have a bit of a chamfer or bevel around the bore hole while others do not. The depth & size of the ones that do vary. The problem is that with some of the lifters, when they are at their highest lift position, the oil groove/ring in the middle of the lifter actually pokes above the top of the lifter bore a little bit. This is obviously not good. See the attached images for reference. Quick video here: https://youtu.be/ggilUawdYlk.
The shop said they've tried 4 different sets of lifters with this cam so far (Comp, Shaver, Isky and now Morel) and they all exhibit the same issue. The head engine builder there told me he's never seen this before and right now his best idea is to have the cam's base circle ground down a bit to allow the lifters to sit further down in the bore but that sounds pretty drastic and will cost as much a whole new cam.
Is this a common problem or do I just have a particularly crappy block? Does grinding the cam down sound like the best course of action for this particular issue?