Need cam help!
 

Have gen 4 tall deck 540, proformance alum heads, dart intake the came is unclear to me as being good or not for marine use. Have trs set up with headers and dry exhaust.
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Just went thru this call bob mandera at MARINE KINETICS? it will save you alot of headaches.

What heads? That will make quite the difference

RHS from what I can tell. they are nothing special. That's also the cam that's in the motors now.

Seems like an awfully lot of cam for a pleasure N/A 540 Marine. Just my opinion, but,

too much duration.

Intake valve closes too late

LSA too tight.

Is this a 10.5:1 engine that will turn 6500, or a 9:1 engine that might see 5500-6000?

It's pro comp heads not RSH...

Not. Sure the. 10::5:1 From the info I have when I bought the boat

You sure they are not Pro Action ? RHS bought Pro Action. RHS and Pro Action made cast iron heads too.

ProComp is/was a fraudelent company. They make alot of crap. Some people like them....but I think that's there wallet talking. ProComp , in regards to heads, only makes them in aluminum.

BTW: I'm always nervous of others peoples used motors as they sit, but more so with cheap schit. My opinion.

That's a whole lot of cam!! Pretty much a waste of Torque/HP in the power band that one would traditionally run a non-race marine motor in. JMO.

It's pro comp heads for sure and that's the cam in the motors. So that cam coming out for sure. Thought it was big but wasn't sure.

Bob Madera with Marine Kinetics

Thinking on this subject, has anyone heard from Harold Brookshire (Ultradyne cams)
Last I heard he was recovering from a heart attack in 2012

Procomp heads, 10.5:1 compression, overcammed, 110LSA........................

Let me guess, the builder was into cars not boats............

I was down at Bullet Cams in Oct 2013 picking up a nasty little flat tappet cam for my 302 Mercury 68 Cougar, and two new roller cams for my boat, Tim, James and I did talk old school and Harold came up but no discussion about health issues. Last I heard he was doing well over at Lunati.

I just pulled similar UltraDyne solid roller cams out of my 454's. @ 0.050" 252/264. 0.632"/0.632" 108LSA
I had Bob M. build me 2 cams last spring. Brought my power band down from 6500 to 56-5800.
Propped up a few pitches. Gained cruise and much better GPH burn. Not blowing straight gas out the exhaust. lol

Have to say, when I pulled my motor out of the jet boat and re-cam'd it for the 28 footer I told Harold I wanted decent idle, nasty sound from 1-4 k and all the power I could get to 6500.

It pretty much spits fuel at 2k, but I never drive it at that rpm.

I dont know if they Bob and Harold know each other, but the time they are willing to spend with a potential customer is priceless

Witch one should I use? Bob or Harold. Thanks for the help also. The cams seemed off to me and as far as the heads well that's not in the budget.

Last number I have for Harold 662-562-4933. he is a cam designer. Bob will look at your complete engine package and make recomendations. I dont think you can go wrong with either one.

I dont know Harold, so I cant say anything about him. However, on oso, you find many happy customers who have went with Bob Madera's cams.

i dont talk about cams anymore so no comment there but the pro comp heads wont even be good for an anchors imo,sorry but you get what you pay for in the cyl head department.call bob m for a new cam&heads.

Lol notice didn't ask what cam to buy. Just is this one I have worth a crap. And the money tree doesn't have the funds to finish the whole boat restoration and do a whole top end.

I know the cam question is a very delicate subject.

Not that I'm promoting the Procomp heads... I saw that there was a pair on the flow bench a few months ago so
I asked Jim how they flowed, he said surprisingly well with a little work. He did mention that the cores were not consistent
and the walls varied so be careful if you remove any material. So if that is all you have run them. I'll see if I can get the final flow #'s.

I've heard the same things regarding the pro comp. Decent flow, but poor consistancy in the castings.

Rookie, whats your take on this video? Or Jim V's? I've heard about this kind of quality workmanship from the big head manufactures regarding valve jobs in the past, when it comes to buying a complete bolt on ready to run set of heads.

https://www.youtube.com/watch?v=X-7lgXGani4

Called a local parts place and they told me the heads are fine if you but them bare. It's when you get their compleat set up is most of the time an issue. They sale pro comp and all the others. Didn't try to talk me into another bran at all just said to crap the parts on them If it was pro comps springs valves etc

Having the right springs (and other valvetrain components like lifters, pushrods and rockers) is extremely important to reliability in a marine engine, especially with an aggressive, high lift roller like that one. If you skimp in this area, it will very possibly come back to bite you.

Yes, we have talked about this before. I believe he loves explaining to his customers why he has to charge them for a guide hone and a seat job on their new ready to run heads. Or, someone will buy complete heads, throw them on their engine and then when it turns over it sounds like their is a dead hole and the leak down sucks. There are some that are better than the others, but all of the manufacturers need to be double checked.

Kind of makes me want to pull mine off and have everything checked.

Absolutely. I spent over $20k with Bob in the past six months and while that will probably buy a little time I'll have to say that Bob never tryed to rush to get off the phone and wanted to make sure I was totally informed and comfortable with where we were going with my project. We spent hours on the phone, several hours. There is no equal in my book.

They are perfectly fine to buy bare and put together with good parts until you run it and the valve seats fall out because the aluminum is so crappy. Whatever parts place you are talking to either doesn't know what they are talking about or just wants to tell u what you want to hear. Don't believe me call people that know what they are doing and are the best when it comes to cylinder heads and ask them. Any reputable engine builder would not even let you get through the door with that kind of junk.

My biggest worry on a marine engine running the ProComps would be porosity in the castings. Even if you get the other issues with questionable machining straightened out so they live past 100 hours, you have the long term issue of a water jacket becoming porous and turning your engine into a cappucino machine.

So then is this not a good leakdown test?

http://33outlaw.zenfolio.com/img/s5/v121/o548260849/c1/p904307208-215.mp4

I split a cylinder once with Brad Penn Green oil. I had shamrock shakes for everyone back at the dock. Looked like St. Paddys day in my bilge