Same lifters I am running. Endurance lifter rated for 6600RPM continuous. They also have a High RPM version, for 7000+. I was told by several big marine engine builders to use the endurance lifters, as that's what they use.

I have a buddy running the morel street lifters in his engines. No issues with them so far.

PS. The lunati, howards, PBM, are made by Morel. I don't think its snake oil. Lunati gets the lifters from morel. I doubt the sales/tech guy is making out by selling us the more expensive lifter. Their profit is probably very close for either set of lifter. Im sure if you called them and told them you were building a 900HP blown deal, they'd recommend their forged crankshaft and not their cast crankshaft. But if you called and told them you were building a mild 400HP big block going in your molestor van, theyd suggest their cast crank would be suffice. :bunnydance:

Lifters it is then.

Thanks

I have a similar cam in a 524 with the AFR 305's with the CNC'd chambers and bowls at 10:1 compression. I did a gasket match and runners myself. I went with the Morel lifters, but I have a set of Crane 13532's with 50 hours on them that I would let go cheap. I have a 280 also, so far I've hit 90 with 4 adults and a full tank. Still have a lot of tuning to do hope to be in the mid to upper 90's when done.

Give Bob M. a call for a set of the Morel lifters. Pretty sure he could get you in at or under the $600 mark. You will also want to check your valvetrain geometry and run the correct length pushrods. Don't cheap out on the pushrods on a cam with that much lift! If they start flexing on you at high RPM's it could set up harmonics that could adversely affect the rest of the valvetrain. You can find yourself heading into all kinds of bad situations like lifter loft, etc. Talk to Bob - he is one of the best sources of information out there, and he is the type of guy who is willing to take the time to talk to you on the phone and steer you in the right direction. Wish I had talked to him when I built my engine the first time!

Thisislivin, that's basically exactly what I'm wanting. At the point I change the heads I'm hoping for 90. I talked to Steve stepp and he said with 600hp or close to it I should be in the 85-87 mph range.

What's wrong with the crane lifters you have? Are they not heavy duty enough? I'm Interested in picking the lifters up if they can work for me. Pm with price and details.

I may call bob this week as I'm getting real close to getting all my parts.

Thanks

The Crane's might be OK if they are the long-travel lifters (for GM style Gen VI dog-bone arrangement) and they have the larger .750 wheel on them. Everything I have read seems to indicate the Morel's are kind of the gold standard, but I have heard that Isky makes a good product as well. Can't speak for the other brands - no personal experience with them.

Thanks budman. Ill have to check out the details to make sure they will work.

That’s the correct number for that combination with the OEM heads.

That will depend upon the base circle of the camshaft. When attempting to utilize the OEM style horizontal tie bar (dog bone) lifters you will need to mock up the engine to finish spec and check both the intake and exhaust.


The advice they provided you was accurate. Morel makes 3 levels of lifters in the .842”, hydraulic roller configuration.
The “Street” lifter is a cast body with a .700” wheel and has a place as an OEM replacement lifter. It is not designed for longer duration (23x+) camshafts and the valve spring rates, seat, and open forces required in a performance marine application.
The performance lifter has a steel body with a .750” wheel and is “good” to ~ 6500 RPM and 200#seat/500# open.
The High RPM lifter is a billet body lifter with a .750” wheel which I have personally seen run well in excess of 7000 RPM.
The .903” version will feature a .810” wheel, which combined with a 55mm+ core will open new opportunities in hydraulic roller cam development.


I would caution you regarding the economy of running used valvetrain parts, or OEM components that are outside their design specification, in marine performance applications.
Regards,

Bob

That Velocity must be a good hull. I'm impressed that you can go that fast with that setup. You are faster than me running a 509 & whipple, but you have way better heads, cam and more compresssion. I would love to get mine in the 90mph range.