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Quote:

Originally Posted by Daytona25 (Post 4670629)

I’m not against solid and have considered it, just with my Imco exhaust it means pulling the exhaust loose from the head to get the valve covers off, but if that’s what is recommended for the best durability I’ll go that route. I have comp gold rockers currently so would the be sufficient with stud girdles or do I have to step up to shaft mounted rockers to get reliability?? Also at given times my boat may see 45min idle time in gear which is 6-800 rpm, is that gonna cause concern for solid roller lifter failures?? And I boat 50-75hrs a year so is a one time checkup on valvetrain in that amount of time sufficient with solid roller?? I already considered solid setup once, for the added power, and sound but was concerned about lifter reliability, considering idle time ect. My boat is used primarily for a pleasure boat idle time, cruise rpm 2700-4000 depending on situation. Don’t do any tubing skiing ect just mainly a hot rod family boat with the occasional high speed blast!

I had twin blown 489 in my Daytona 28 but switching to LS engines currently. I ran sold roller cams with morel lifters and gil exhaust. I suggest you do as I did and find some marine two piece calve covers which eliminates the removal of valve covers. With good components lash will rarely have to be adjusted but still need verifying.

Quote:

Originally Posted by Daytona25 (Post 4670629)

morel lifters are pressure fed not a problem with idle. A 1075 and a 900sc hold up pretty good.

Had a bad experience with morel hyd lifters, solids are better quality I guess?? Would my comp rockers with stud girdles be good enough to keep lash in check?? How many hrs are valvesprings gonna last with solid setup?? How many hrs will lifters last?? Also how many hrs between checking lash??

Quote:

Originally Posted by Daytona25 (Post 4670629)

I’m not against solid and have considered it, just with my Imco exhaust it means pulling the exhaust loose from the head to get the valve covers off

I replaced my valve cover studs with 1/4-20 stainless socket head cap screws. I run solids and can remove my valve covers without loosening my exhaust using looong ball end 3/16" Allen wrenches.For reference; Stainless Marine manifolds and CMI E-Top headers. I do have to take the V-clamps off the tails.

You guys suggest solid roller but nobody can give me hrs per maintenance and or parts replacements with solid roller setup???

Quote:

Originally Posted by Daytona25 (Post 4670639)

You guys suggest solid roller but nobody can give me hrs per maintenance and or parts replacements with solid roller setup???

I ran solid Ultradyne cams for 6 or 7 yrs ('06-'12 or '13) max 6500RPM Comp 943 springs 0.022" lash. I would check lash at the start of every summer or any abnormal tick, never a problem. I run Isky Red Zone lifters that have been rebuilt once. In '13 I installed Cam Motion HR cams and still run my solid Isky Red Zones. I run Comp 933 springs 0.007" lash 5500RPM. I had issues with my valve train on one head cylinder 1 and 3 intakes. I did change out 2 of my Scorpion rockers on those two cylinders with 2 other Scorpion rockers. (I didn't like the feel of them and the had a noise) Both were 1.8 ratio but 2 different models. I did not check the push rod to head clearance with the 2 new rockers. (I assumed they were the same) The push rods had the slightest contact with the head and I assume were deflecting a little. I clearanced the head and got thicker push rods to solve that issue. Now every time I check lash it's just checking it. No adjustments. Might not be exactly your situation and I'll get flamed in a minute or 2 for running solids on HR's lol but it's all good. Hours?? I probably have 250 hrs on a set of Isky rebuilds and 250 hrs on the 943's and 150+ on the 933's, 12yrs or so combined. I just rebuilt my bottom ends and switched blocks last spring, but reused all of my valve train components.

I’m pulling my motor to hone and ad new rings and bearings now just because I figured if I’m replacing everything else it only makes sense to have it all new at once, so I could assume if I went to solid roller setup with red zone lifters they would last 250hrs when most likely I’d need to refresh it all again anyway??

Quote:

Originally Posted by Daytona25 (Post 4670664)

Yes. It can last that long with proper maintenance, the use of good oil, and good valvetrain stability. Make sure you use good valve springs and set them up correctlyfor the pounds required. Valve float will kill them faster than anything. I would also suggest a low lash solid roller cam as well vs standard.

I just read about the low lash stuff thought it might be a little easier on valvetrain!! Anyone have any recommendations for a solid roller off the shelf cam?? I was considering the crane 771 or 651 if I went hydraulic....so I guess something comparable to those??

Engine specs? Peak desired rpm? Exhaust?