cam and intake selection
 

Lost one engine a few months ago and have finally found 2 330 horse takeouts with 300 hrs on them. Engines are completly stock. Boat is a 90 baja 30 ft. Read several of the threads on building the 330 but still undecided on just what combo to use. Need to get parts on order asap.
This is what I have so far: rebuilt rectangular port heads with guide plates,harland sharp 1.7 roller rockers, Gil magnum exhaust, water pump cross overs, fluid dampner, one peice push rods, block bored 30 over, hyperetic 9.5:1 pistons [block bore and pistons selection can still be changed within a few days], all ARP fasteners. studs on 2 bolt main.
Want to run the quadrajets because they are new.Could not find a good highrise to work with rect port heads and be of spreadbore design.
any help would be appreciated. Katrina survivor, Tylertown Miss.

Re: cam and intake selection
 

Just found out that I indeed have 4 bolt mains. Maybe things are starting to look my way.

Re: cam and intake selection
 

Get with RMBuilder on this website. Bob is the man when it comes to camshafts and valve train components. Not only does he know what he is doing but you will not find anyone more conscientious or honest.

Re: cam and intake selection
 

I melted the top off a one of those "special" cast pistons in a built 406, after the rebuild of the blown engine, used Forged instead, no problems, timing set exactly the same. IMO those pistons are crap. Motor still running (some else's now) 7 years now.

Re: cam and intake selection
 

rmbuilder would be an excellent choice.

Re: cam and intake selection
 

how do I get in touch with rmbuilder? also having trouble finding a spreadbore intake for square port heads. does anyone know of any?
thanx

Re: cam and intake selection
 

by the way, anybody have a pair of stock alum. high rise intakes for the quadrajet they want to get rid of?

Re: cam and intake selection
 

___

Re: cam and intake selection
 

I have 2 of them. They are stock 454 mag intakes. $120 +shipping for both.

Re: cam and intake selection
 

team Tickfaw,

Those dual plane hi-rise intakes that Payton has is a great price, and would be ideal for the rectangle heads you're using. Also, I agree with the others about "rmbuilder"/Bob...experience, knowledge, intergrity. He engineered my head & cam combination for my 565cid engines and I am very pleased with the results especially in light of what I wanted to do with them.

Re: cam and intake selection
 

Best way I know is to PM him

Re: cam and intake selection
 

Thanks for all the help so far!
Payton, if you will get me your email we will work out the details. Seems fair to me.
Just a little background on what I am trying to do, after losing the one engine, when I opened her up I found questionable assembly and parts used. Do not know any info on engine builder. 2 rod caps broke loose and you know what happened. Engine had been bored 60 over, 10.5:1 pistons, crower roller cam and lifters, rect heads, roller rockers, all forged internals. But looking at the crank it had been welded on [pad for weight] and after crack checking found cracks at weld. Cam had deep grooves in the first 3 lobes where roller lifters had been riding. weiand intakes[looks like the same as on hp 500's] , 1050 style 850 holley non marine.
Just plane worried of what the other engine looks like inside. Had these engines on the stops one time when test driving. Boat ran 75,non gps.
Had a friend that had the 2 330's with 300 hrs, carb to pan. Will use the rect heads off old engines.
Talked to ultradyne yesterday,Tim Goolsby and he gave me 2 choices on cams. Need help choising one.
One is the 280/288 at 50 has 223/231 and 515/515 lift or the 288/296 at 50 is231/239 with 550/575 lift. Both have 110 lobe sep. Would appreciate any insight you may have.
Thanks again.

Re: cam and intake selection
 

how do I get in touch with you. I will take them.

Re: cam and intake selection
 

emailed you

thanks

Re: cam and intake selection
 

Tickfaw, are you talking hydraulic flat tappet or roller design cams??? I think you'd be much happier with the smaller Ultradyne cam of the two for a 454cid marine engine. Ultradyne cams usually have more aggresive lobe profiles and you'll wear out valve springs a little sooner. rmbuilder/Bob would be a good person to stick with on the cam tech.

Re: cam and intake selection
 

I ran an Ultradyne 223/231 @.050 .525/.550 on a 112*CL
The boat ran good for about 110 hrs then a cam lobe wiped out. We had to tear down the whole engine. Somebody bought Ultradyne, a big name, I don't know if they are still making their own grinds anymore. Get with RM Builder

Re: cam and intake selection
 

Whiteknuckle,
Was this recently? Of all the problems I've had lately, sure don't want to step into anymore.
These are hyd, non roller type cam. They quoted me a price of 230 for cam and lifters and 70 for the springs to match. Sounds pretty cheap. Maybe you get what you pay for?
Are cometic head gaskets the way to go on the mark 4's?
What about intake gaskets? Any special marine type I should use? Thanks for everyones help.

Re: cam and intake selection
 

TT
The cam let go about this time last year. The cam I bought was when Harold was the guru there and they were in Mississippi. Kaama is correct, Ultradynes put out good power, but they ran into some bad cam cores at one time. I thing Mr. Gadgets had a simiair issue. Now, the bad cam core thing is something that can happen to anyone, so I am not being critical of Ultradyne. It was just one of those things. My suggest continues to be; get with RMBuilder. This guy knows his stuff. Tell him what you want to do and let him pick your stuff for you. His prices are also very fair.
Unless you are running a blower motor on a Mark IV use the Felpro gasket. Make sure you put new ARP rod bolts in that thing also.

Re: cam and intake selection
 

Thanks for all the help and guidance. I will shoot rm builder a email. What makes a marine engine hold up at sustained rpms better than a automotive engine? Are the tolarnces inside better?
Do you happen to know the part number for the felpro head gasket? Its for a 89 454 mark 4.
thanx

Re: cam and intake selection
 

17040. There about $38 a piece from Summit. Its not the rpm's so much as the load. Marine engines are under constant loading where an auto engine is only similarily loaded during acceleration. Correct piston to cylinder wall clearances and wrist pin clearances. The cam choice plays a big part and alot of it is based on the heads and exhaust. Valve train components need to be the best you can buy and the correct ones. Spring pressures, Inconel exhaust valves. Lots of things. Having gone cheap many times and blown them up, Ive learned the hard way.

Re: cam and intake selection
 

I even bought a pair of Ultradyne's hydraulic roller cams a few years back and installed them in my 540's. With new engines (new fuel pump push rods) the fuel pump lobes on the cams went bad within about 35 hours or so. The funny thing was that this happend in BOTH engines almost simultaneously! I have not used anything from Ultradyne since then.