Lunati has this one. Looks interesting. How would it very from say the 212/218 @.050 112 LSA

Hydraulic Roller. Good idle. Largest cam recommended for power brakes. Stage 2 cam, excellent street performance and off road use.
•Advertised Duration (Int/Exh): 284/284
•Duration @ .050 (Int/Exh): 218/218
•Gross Valve Lift (Int/Exh): .492/.492
•LSA/ICL: 112/106
•Valve Lash (Int/Exh): Hyd/Hyd
•RPM Range: Idle-5500
•Includes: Cam Only

I have been told by other Glastron gs205 owners that their boats will hit 50 mph with stock 305 engines. Is that about what I can expect with the 383 and duo prop Volvo penta in mine?

That is a blanket statement not completely truthful. There are many other variables that come into play when choosing the LSA etc. A 114 LSA does not, in and of itself, make the motor lazy.

Okay, I called Lunati and asked about the single pattern cam I had posted and they highly recommended the 211/219 @112 and said it works really well. I guess I'm down to that cam or the comp 264 which has nearly the same specs. Again, what kind of top rpm's can I expect from the comp 264 in my 383 with better flowing GLM manifolds and would it be of any benefit to go with stainless risers over stock risers?

A 264 cam will be too small. i have a 262 cam in my 355, and thats too small.

[QUOTE=38special;4088576]Okay, I called Lunati and asked about the single pattern cam I had posted and they highly recommended the 211/219 @112 and said it works really well. I guess I'm down to that cam or the comp 264 which has nearly the same specs. Again, what kind of top rpm's can I expect from the comp 264 in my 383

Still dead at 4000rpm

You caught me !

Edit in: But not too bad for a blanket statement. LOL.

I think this cam from Summit has the same spec as the cam in the 6.2 MX merc engine

http://www.summitracing.com/parts/crn-104224

5100-5200 rpm, been there done that. Oh wait, the XM on the 112 will be 100rpm lower. 51-5200 is for the 110 street grind. The XM276 was 54-5500. All for a 383.

A day away from payday and I'm still flopping around. Lol I did get a hold of Muscle marine here in Kansas and he said he has several cams that will work. One that will for sure make 350 h.p. and A 400 h.p. cam which he said would likely be more like 370 h.p. out the prop.

Make it simple and call Bob Madera at Marine Kinetics. He nailed exactly what I wanted and gave me a no BS expectation for performance.

You can tell he lives for this stuff and knows exactly what to do considering whatever goals you have.

That was the plan to start with but sometimes you have to change plans. After making the auto and property insurance payment yesterday I came up short of having enough to even buy the 350 hp cam that muscle marine has and that is just $250. There was a time when I could make house payment, truck payment, insurance and more out of one weeks check and still have hundreds left. Not anymore. Lifes a ***** then you marry one. The Dodge is starting it's death wobble thing so next payday, 2 weeks away is no guarantee that there will be money left over for a cam and Bob can't make a living based on my promise to pay him next payday. Sorry for the rant but this payday was another let down. A smart man would sell the boat but not me. Damn the torpedo's, full steam ahead.

That suks. Sounds like time to sit back and wait...but that's personal advice which you are not asking for and we should not give out.

[QUOTE=38special;4090162]That was the plan to start with but sometimes you have to change plans. After making the auto and property insurance payment yesterday I came up short of having enough to even buy the 350 hp cam

Just curious, what are the specs on the 350hp cam

I think that is sound advice SB and I don't mind at all. I have other things I could sell to buy the cam and more and I would have in past years but now days I see that as going backwards. The next check will be freed up to use more of + I have a start to some decent overtime on it already. Some day I may tell you the story how I bought the boat the same day I got laid off while working in San Antonio Texas. I made it to northern Oklahoma before running out of fuel and money both and had to call my wife to put some money in my checking account so I could make it up to Wichita. I thought it best to keep the fact I had bought a boat quite until I got home. Boy did the sparks fly when I pulled into the drive way with the boat hooked up.Lol After 2 weeks of wet sanding and buffing it looks brand new and my wife told me it's a beauty.

I'll ask him when I order the 400 hp cam and post. I suspect one or both were grinds used in Scorpion apps.

It's not that important.

Made 429hp at 5800 and 416ft lbs. at 4700. Fully dressed, Stainless Marine Exhaust, ready to drop in the boat. :-)

Bobl, I have been reading about your great success with the 6.2s for quite some time, and have a question. The build that you speak about above , was the original efi kept , and if so, did it have to be sent off? Also I have a 98 6.2 with the 90mm throttle body and mefi3, would mine be considered the early model with the good intake .? Thanks so much for the advice

[QUOTE=01Sea;4139999]Bobl, I have been reading about your great success with the 6.2s for quite some time, and have a question. The build that you speak about above , was the original efi kept , and if so, did it have to be sent off? Also I have a 98 6.2 with the 90mm throttle body and mefi3, would mine be considered the early model with the good intake .? Thanks so much for the advice[/QUOT

Yes, yours is a much better candidate.. A good efi intake would still help, just adapt the throttle body to it.The mefi 3 makes it a lot easier to tune. A lot of people can tune them.

Bob

I gotchya. Thanks for getting back to me.


Nic

The cam that spectras only gave the link for is the stock 6.2 cam. With about 3/4 tank of fuel and just me onboard the engines will pull 5300 r.p.m.s which I believe is just under the limiter.
Cam: .452/.465 lift, 214/220 @.050 duration (Same as CRANE 2032) Rpm range 2000-5500. This appears to be close to the maximum lift on Vortex heads unless you replace springs, retainers, and cut down the valve guides.

I called Bob Madera and talked with him one last time and he was good enough to offer to let me make several payments if I did end up having him grind a cam. He was up front with me on what to expect for power with out investing in a better exhaust which I don't have funds for at this time. I ended up choosing a Lunati cam. I found this next bit of info on another forum comparing the Lunati I went with to a comp cams grind.

[QUOTEThe one I remember dynoing was the VooDoo 60120, the 262/270 cam vs the Xtreme Energy 264HR. The VooDoo was 211/219 at .050, the 264HR was 212/218. The VooDoo lift was a little higher, and LSA was 112 vs 110.
From 5000 to 5600 the VooDoo averaged 10 BHP higher that the 264HR.
From 3200 to 4200 the VooDoo averaged 8 ftlbs torque higher that the 264HR.
But the best news was at 2500, where the VooDoo had 30 ftlbs torque MORE than the 264HR. It was 20 ftlbs more at 2800, and 3" more vacuum at idle.
With 9:1 CR, the 270 VooDoo is as big as I would run, and it works with 3.23 RAR.
Computer simulation programs assume that all cams flow air the same way, but they do not. If they did, one company's 300*, .500" lift cam would make power like another's. They don't.
A computer simulation program that gave an accurate Horsepower/torque curve would be similar to those used by the major car manufacturers, and would require the exact cam/valve lift curves, not just a couple of numbers.

UDHarold ][/QUOTE]

That was very noble of him.

From one biz owner (myself) to another (him) - that should never happen.

I would love to trust everyone who walked thru my door or called me, but if I did, I would have been out of business and on the street along time ago.

Maybe my wording was less then stellar. I proposed 2/3rds down and the last full amount 2 weeks later which he said he could do that and yes it was very noble of him.

thank you for the help