Originally Posted by Black Baja (Post 4507491)

2 motors Isky .904 bushed .765" lift 6,500 rpm .000 change in lash 4 seasons
2 motors Isky .904 bushed .765" lift 7,500 rpm .000 change in lash 4 seasons
1 motor Morel .904 needles .721" lift 6,200 rpm all the time stud rockers no girdle .000 change 200 hours
1 motor Comp Elite .904 needles .721" lift 6,200 rpm end of second season failure at the ramp
1 race boat motor Jesel .842 needles .800" lift 6,500 rpm 6 race seasons .000 change in lash. These lifters were in a pleasure boat motor for unknown hours b4 they were put in the race motor.

We have a/b tested the Isky lifters same dyno same day and they are down 30hp over needles. Are they nice? Yes. Do they rob power yes. However if you are going to do regular maintenance. I don't see that they are needed. If you are of the lazy type with maintenance I think they are a better option. All depends on the owner and how much they care about there boat. Myself I prefer Jesel's in my own stuff. I don't mind running through the valves every week. I don't think there is one brand
Lifter that is a fits all. You have to look at the entire package. We run a MINIMUM of 7/16" .160 wall pushrods in everything sometimes 1/2" on the exhaust even 1/2" dual taper on the intake. DO NOT used 3/8" pushrods and any kind of camshaft. We also use Titanium Retainers and Titanium locks in everything. We have a boat with a pair of 1200hp turbo motors with the same Titanium Retainers for 15 years. Actually I borrowed the locks out of the one motor to put my new heads together. And they are 15 years old. The key to success is a well matched package. You can spend all the money on everything but if the package doesn't work together you are not going to be a happy camper. Keep the oil pressure up at idle. If you have to turn the idle up. And don't idle for long periods of time. I think this contributes to longer life. Basically run the piss out of it as often as possible...

Originally Posted by getrdunn (Post 4507725)

What I'm hearing here is regardless of bushed robbing power you prefer them over needle unless their Jessel. Regardless 904 over 842 is a plus and you really can't go wrong with isky's or morels or others like crower severe duty etc that come from morel.

Given I'm a weekend boater go out for either a few hours and run reasonably hard with a few stops. Or long distance runs cruising at 3,500. Very little idle time. We have very short channel and litterally on Lake Michigan in 5 minutes. I rarely idle under 1,200 unless docking and really trying to pizz somebody off. I do my own maintenance and very particular with annual tear downs regardless. Check valve lash, bearings, lifters, spring pressures, rockers. Pretty basic.

So needle or bushed?? Although Jessel builds a fantastic lifter their not in budget.

I heard the bushed was a little more finicky with oil brand/weight etc. frequent oil changes due to dirty oil wearing on bushing however I do frequent oil changes anyway.

Originally Posted by MILD THUNDER (Post 4507649)

Didnt morel make the solid roller lifters for crower ?

Originally Posted by Black Baja (Post 4507655)

Johnson

Originally Posted by 14 apache (Post 4507730)

I would do crane or morel you don't run hard long your real hours at cruse think you will get a lot of time out of a set of lifters with no worries as long as spring pressure is responsible low. That's my though. Think you could go150hrs on lifters without a problem. Have you had any failures?

Originally Posted by 14 apache (Post 4507730)

I would do crane or morel you don't run hard long your real hours at cruse think you will get a lot of time out of a set of lifters with no worries as long as spring pressure is responsible low. That's my though. Think you could go150hrs on lifters without a problem. Have you had any failures?

Originally Posted by MILD THUNDER (Post 4507731)

Even back in the day? Like say, a few years ago? I thought the crower solids had bigger wheels and fork style lifter even in the .842 diameters up till recently? I know the hydraulic crowers my buddy had bought several years back, were .750 wheel fork body. They looked like the morel. I never put them side by side on a bench to compare though.

Originally Posted by GPM (Post 4507746)

Low spring pressure will cause more lifter problems than high pressure. Jumping over the nose or bouncing off the set takes the bearings out and hammers through the cams hard surface. Just my opinion.

Originally Posted by GPM (Post 4507746)

Low spring pressure will cause more lifter problems than high pressure. Jumping over the nose or bouncing off the set takes the bearings out and hammers through the cams hard surface. Just my opinion.