- Joined
- Jan 24, 2005
- Messages
- 296
Tim,
Question 1 - I haven't disconnected the water cooling yet
Question 2 - The 1440 b/c was on it when I lengthened the pipe
I'm really looking forward to next Sunday at Penrith where hopefully, we'll get some reasonable water for more accurate testing. I'll have to get there early!
Thanks,
James
James, This is what i would do #1 leave the water on yes the 21motar likes to run hot but by taking the water all the way off you will end up blowing the sleeve out of round because of it getting to hot. I would leave the water on but squeeze it down about half .#2 please remember this load=x pipe =y motar=z
in short x,y,z when you have these thing right hold on because your gonna go fast. Now the C.M.B 21 r/s
that you are running has a lot of power it can pull a big prop but if you don't run a big enoff prop you will tend to lean it down to far and take plugs out.So i would check the deck clerance on the motar and make it no less then 8 thousands because the head volume is to big. The head also has a conicle cut on it which get's read of heat to so by doing this you will biuld heat in the motar but not getting it to hot. Then you have to richen up the needle witch will make more power so thats the Z part.Then there is the load factor which is X .Now Mark Sholund is right the 1440 prop is faster but hard to set up when you get everything right the 4053 prop
is faster in the corner and makes the boat not so touchey i would put the 4053 on it and run it. Find rich on the needle but dont lean it down to far to make it go in the straits.This is where Y comes to play start shoveing the pipe in untill it dose not want to come on the pipe very easy and then pull it out a 1/4 inch now you have your load and your pipe and your motar working at the best it can. and going to 40 persent nitro was a good thing the more nitro and alcohol you can run the ritcher the motar will get. Its just more fule to burn and we all no that the more fuel you and burn the more power you will make and the faster you will go. So i hope this helps and good boating.
sincerly ,
Chris Grim
p.s if the spelling is not right it was late and i couldn't find spell check :unsure: