who has broke a scx imco drive?
09-19-2010, 04:43 PM
#111
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Your polishing looks great but is probably actually slowing you down a couple mph. General consensus is rougher is faster. Probably why sportmasters come with that slightly rough satin finish.
09-19-2010, 09:20 PM
#112
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When I bought my Hustler it came with the Bmax drives,I dont think there was much speed loss over the xr's it ran within 2 mph of the factory test report.
On the B-Max foot,As far as speed loss I went from the standard bravo one on mine to the crescent lower and saw maybe1 mph in speed. I then started thinning the skeg and smoothing,thinning the foot as much as I could,they come pretty thick form the casting.Im sure the polishing helped
before and after pick
On the B-Max foot,As far as speed loss I went from the standard bravo one on mine to the crescent lower and saw maybe1 mph in speed. I then started thinning the skeg and smoothing,thinning the foot as much as I could,they come pretty thick form the casting.Im sure the polishing helped
before and after pick
09-19-2010, 09:33 PM
#113
Chris
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A submarines skin is somewhat rough to the touch.
I checked.
Chris
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09-19-2010, 11:05 PM
#115
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We have a 96 Cigarette Cafe Racer, a heavy flat bottom boat! Running appr. 800 HP each motor with blowers. Blew 5 Imco SC's in 1 season! This year put on 2 complete Imco SCX's with 1.34 gears 2" extensions. We have put on 90hrs this year, NO problems or issues! Strong drives, very smooth shifting. Lost about 8 MPH but all worth it! Tried numerous props, can't gain it back! Well worth the investment!
So if I do buy a pair of SCX and lose speed I will build the motors for more power, then I might break the SCX and be back to square one again. This sucks! I like the easy bolt on install of the scx and not having to remove my engines cause I can work through my stand off boxes.
Makes the Arneson bravo conversion look more appealing. Rated for the same HP as the SCX (850) but should require less to turn, less drag, and more speed. Plus I could sell my current stand off boxes and steering to make the cost the same or less. Only down side is more labor for me. Have to remove the engines to change motor mount and drill some holes.
The Xpower drive would be awesome if the price was better and more info was out there. The owner of X power sold me on how good the drive is during my phone call. Surface drive, rooster tail, dry sump, bolt on, etc!
B max upper is great, but the lower does not impress me over the sc I had. I like the new owner though, good customer service when I have called.
Thanks for all the input. Still researching. Hopefully I make a decision by the Miami boat show and get the new drives ordered and installed by june!
Last edited by offshorexcursion; 09-19-2010 at 11:07 PM.
09-20-2010, 04:03 AM
#116
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Glad to hear you have not had any problems! That my number 1 goal. Not sure I can handle losing 8mph though. I thought only cats lost that much speed. I put 100-150 hours on a year and would like to not break, but still go fast of coarse!
So if I do buy a pair of SCX and lose speed I will build the motors for more power, then I might break the SCX and be back to square one again. This sucks! I like the easy bolt on install of the scx and not having to remove my engines cause I can work through my stand off boxes.
Makes the Arneson bravo conversion look more appealing. Rated for the same HP as the SCX (850) but should require less to turn, less drag, and more speed. Plus I could sell my current stand off boxes and steering to make the cost the same or less. Only down side is more labor for me. Have to remove the engines to change motor mount and drill some holes.
The Xpower drive would be awesome if the price was better and more info was out there. The owner of X power sold me on how good the drive is during my phone call. Surface drive, rooster tail, dry sump, bolt on, etc!
B max upper is great, but the lower does not impress me over the sc I had. I like the new owner though, good customer service when I have called.
Thanks for all the input. Still researching. Hopefully I make a decision by the Miami boat show and get the new drives ordered and installed by june!
So if I do buy a pair of SCX and lose speed I will build the motors for more power, then I might break the SCX and be back to square one again. This sucks! I like the easy bolt on install of the scx and not having to remove my engines cause I can work through my stand off boxes.
Makes the Arneson bravo conversion look more appealing. Rated for the same HP as the SCX (850) but should require less to turn, less drag, and more speed. Plus I could sell my current stand off boxes and steering to make the cost the same or less. Only down side is more labor for me. Have to remove the engines to change motor mount and drill some holes.
The Xpower drive would be awesome if the price was better and more info was out there. The owner of X power sold me on how good the drive is during my phone call. Surface drive, rooster tail, dry sump, bolt on, etc!
B max upper is great, but the lower does not impress me over the sc I had. I like the new owner though, good customer service when I have called.
Thanks for all the input. Still researching. Hopefully I make a decision by the Miami boat show and get the new drives ordered and installed by june!
09-20-2010, 02:13 PM
#117
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Lower photo depicts a SCX upper and SCX lower with a two inch prop shaft to run cleavers.
It is a 16 inch and you cannot go any bigger nada that is it on diameter. I had about an eighth +/- inch clearance and that is bare minimum.
Why! because the blades will flex when you jump on it and thus increasing the diameter ever so slightly. You do not want to hit the cav plate with those high dollar props.
I have not broken the SCX upper yet. I have smoked a lower gear set recently. The SCX/SCX combo is tough and a strong combo... only problem it scrubs speed to much.
When the weather starts to cool down some more I will see what a few other mods will do for the top end.
KAP
09-20-2010, 11:48 PM
#119
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Funny!
Uhhh! are you volunteering your lower unit for me to try? I recall you have a one inch shorty---only problem is I do not want to buy it if I break it
.Trust me! I want the boat done and dialed so I can de-tune the motor into family mode....ha ha. Almost done we will be at the Absolute Speed and Marine run in a few weeks.
So stay tuned.
KAP
09-21-2010, 05:29 PM
#120
Charter Member #601
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offshorexcursion,
My friend with the 36' Apache/SCX/SCX, did not loose 8mph. He was running within 2mph of what he was with the XRs. He has made some changes to his intercooler setups and he is going as fast as he was before.. this is only 96-97mph, not 120mph like Kap. The intercooler mods could only be worth 25-50hp to gain back his lost 2mph.
If Kap hasnt broken his SCX.. I think you will need a lot more power to break one.
Just my .02...
Dick
My friend with the 36' Apache/SCX/SCX, did not loose 8mph. He was running within 2mph of what he was with the XRs. He has made some changes to his intercooler setups and he is going as fast as he was before.. this is only 96-97mph, not 120mph like Kap. The intercooler mods could only be worth 25-50hp to gain back his lost 2mph.
If Kap hasnt broken his SCX.. I think you will need a lot more power to break one.
Just my .02...
Dick
