tssteph,
It would help, but price the stuff to add them, new custom tailpipes... high dollar drive shafts ... aren't cheap drive shaft kit for the transom assymbly and the engine kit is about $1k i think. this is before you take the time to redo your whole rigging in the engine well. |
quest has the lightest 3100 ever built.....
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Originally Posted by tssteph
(Post 2722406)
Any thought on the advantages/disadvantages of moving the motors forward 12 inches in a 31 AO? Any speed advantage? Getting on plane issues? Mid range issues? My questions are relative to no boxes installed.
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Originally Posted by tssteph
(Post 2722406)
Any thought on the advantages/disadvantages of moving the motors forward 12 inches in a 31 AO? Any speed advantage? Getting on plane issues? Mid range issues? My questions are relative to no boxes installed.
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What RPM are you running at 138 MPH?
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What do you think about using the imco torsion shafts (from an extension box)to move the motors forward 12"? You could make a new rear motor mount and leave the drives on the transom. A couple of stainless tailpipe extensions and move some lines around.
The torsion shaft is not riding on any bearings in the extension box, it's only supported by the gimbal bearing and the coupler, so what would it matter if the motor is moved instead of the drive. A drive shaft guard could be fabricated to go from the transom assembly to the bellhousing in case of a failure. |
Originally Posted by tssteph
(Post 2724077)
What RPM are you running at 138 MPH?
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Originally Posted by TunnelVision3100
(Post 2723949)
He told me to add boxes with a 1in. spacer in the drives and add a tunnel tab and I will be all set! He definately said I need a tunnel tab as well. Our hull design with the tunnel we have, the air flow I guess gets blocked or something, that our hulls around 110-115 get dragged by that triangular V in the top of the tunnel and it drags the boat down. He said the Tab will help create enough pressure to get the tunnel 100% air flow once the boat hits the 115 or so mark.
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Originally Posted by tssteph
(Post 2722406)
Any thought on the advantages/disadvantages of moving the motors forward 12 inches in a 31 AO? Any speed advantage? Getting on plane issues? Mid range issues? My questions are relative to no boxes installed.
|
mine has a tunnel tab and it works good mine spins 6700 rpm 1.36 gears 32 pitch hydro's labbed no diff rings it pulls hard
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