Tofastformellow
Well-Known Member
- Joined
- Apr 15, 2005
- Messages
- 387
Gday , i have a sgx 21 , for some reason its got sgx-1 on the side of it , but i think its just an sgx.
i am pretty happy with it.
after the mac 21 wore out i went to a green head valv, and have been running it on 60% with an 'AB' h7.
its ok, but it runs really flat .. i have scuffed up the bottom of the sponsons. clean and sharp.
i want more speed.
where do i go from here ?,
if i add pitch with like a v945 rounded it just clamps the front end down and the motor wont launch it with its low front end geometry..
i need a prop with heaps of pitch but NO lift is suppose.
if i shorten the pipe it wont get up at all. from 215 mm . a good freind suggested getting the pipe down to around 165-170 mm but it wont run or pipe at all on that setting no matter how lean i get the needle ...
i have tried playing with the limited AOA that the boat has , and have lifted the front end a little , but now if it hits a little ripple it pulls the front LH sponson under and down she goes. ie to loose.
wet weight is around 1.7 kgs , or 3.74 pounds and i run on fresh water at sea level.
any suggestions ?
many thanks
Jason
i am pretty happy with it.
after the mac 21 wore out i went to a green head valv, and have been running it on 60% with an 'AB' h7.
its ok, but it runs really flat .. i have scuffed up the bottom of the sponsons. clean and sharp.
i want more speed.
where do i go from here ?,
if i add pitch with like a v945 rounded it just clamps the front end down and the motor wont launch it with its low front end geometry..
i need a prop with heaps of pitch but NO lift is suppose.
if i shorten the pipe it wont get up at all. from 215 mm . a good freind suggested getting the pipe down to around 165-170 mm but it wont run or pipe at all on that setting no matter how lean i get the needle ...
i have tried playing with the limited AOA that the boat has , and have lifted the front end a little , but now if it hits a little ripple it pulls the front LH sponson under and down she goes. ie to loose.
wet weight is around 1.7 kgs , or 3.74 pounds and i run on fresh water at sea level.
any suggestions ?
many thanks
Jason
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