Originally Posted by 30Special (Post 3292548)

The 72 C is a transmission, not your outdrive !!!!

What DRIVES are on the back of the boat ??
a picture would be very helpfull !!

Originally Posted by rrrwel (Post 3293417)

Fastestonehere I know your boat well.

I'm vey interested in what you're at doing because I'm looking to do the same thing on a 21000 lbs boat . First, do you have Crusader engines?

The reason being is You said that you have "2 454 MK IV,s one standard rotation one Reverse rotation "crank spins backwards" cam is standard direction reverse firing order "gear driven" -

Are you saying saying that your cam is a standard cam and not a reverse cam in the reverse engine? I was thinking I would have to get a special reverse grind cam on mine, but if it's standard cam that would be great.

I was hoping to use a mild cam that would utilize the added stroke to acheive about 400 to 420 hp and 500 lbs of torque in the crusing range. With our type of boats its all about torque, so any way I could acheive more of it that would be better. I also run 72c transmisions. As far as propping I deal with prop scan out of Chichago, they are excellant. With my boat I was hoping to get a couple more inches of pitch with the added torque and then cruise at a higher rpm. I use fuel flow meters and know that if I currently run at 3500 rpms I get better fuel ecoonomy than at 3200. I was hoping to run the rebuilt stroked engines at 3800 because despite the higher rpms the more the boat gets up out of the water the more efficient it becomes. Your boat with the Delta Conic hull begins to really move once it gets on top of the water.

I'm also interested to know what the cost of your rebuild is going to be.

One other thing my builder is concerned about is water reversion if I go too radical with the cam because I do idle alot when trolling. Please let me know how things are progressing and what kind of performance your're looking to get. Any suggestions are welcome.

Good luck - keep me informed

Originally Posted by fastestonehere (Post 3293813)

Yes, Crusaders....

Not Standard Cams....Standard Rotation reverse firing order,Distr. gear is standard cut , Timing Gear is pressed on with a key way. my cam is at Cam motion being measured, Bob is having "6" sets of these made. for people like us. not cheep but Right.

Im not really worried about reversion because bob is working with the LSA so this should not be an issue.

Cost ???? well i build my own Engines... or i should say Assemble my own. but i will keep you all posted on cost as it all comes in.

Originally Posted by mrfixxall (Post 3293886)

i know some people have done this,,make sure you get the reverse rotation rear main and front crank seals..

Originally Posted by fastestonehere (Post 3294148)

Thanks, i've heard that i should get a "non directional" seal.

But how about the oil cooler.....also im a closed cooling system.

Originally Posted by f_inscreenname (Post 3294334)

That's why these motors are built like they are. So everything works normal inside the motor except for the crank is going the other way.
So Bob is is cutting a couple of these cams? I may have to get back in touch with him about mine. I wish he could find some blank flat tappet billets. I have no reason to make the motor go roller and would like to upgrade the RR cam.