caferacer props in or out
01-04-2011 | 02:24 PM
#13
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Joined: May 2004
Posts: 456
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From: Monroe, MI
01-05-2011 | 01:29 AM
#15
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Joined: Sep 2001
Posts: 594
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From: 273.76 miles from Havasu
The boat is more definately more loose with shorties (XR drives). Maybe the shallower X means the inward rotation won't let the props carry the nose as well? Not sure- it just felt tighter (less sensitive to trim) spinning in.
It's really tough to compare apples to apples (fuel load, water/air conditions, etc.), but I think I picked up at least a couple MPH with the shorties.
The downside is that the props slip more getting on plane, but frankly, the slipping is probably saving them with the torque I have. Also, in the rough, the do seem to come out of the water a little quicker.
I am adding 380 tabs this winter, and trying to decide whether to add boxes to set the props back farther (or convert to Arnesons).
It's really tough to compare apples to apples (fuel load, water/air conditions, etc.), but I think I picked up at least a couple MPH with the shorties.
The downside is that the props slip more getting on plane, but frankly, the slipping is probably saving them with the torque I have. Also, in the rough, the do seem to come out of the water a little quicker.
I am adding 380 tabs this winter, and trying to decide whether to add boxes to set the props back farther (or convert to Arnesons).
01-05-2011 | 06:41 AM
#16
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Joined: Oct 2009
Posts: 658
Likes: 0
From: Splendora, TX
The boat is more definately more loose with shorties (XR drives). Maybe the shallower X means the inward rotation won't let the props carry the nose as well? Not sure- it just felt tighter (less sensitive to trim) spinning in.
It's really tough to compare apples to apples (fuel load, water/air conditions, etc.), but I think I picked up at least a couple MPH with the shorties.
The downside is that the props slip more getting on plane, but frankly, the slipping is probably saving them with the torque I have. Also, in the rough, the do seem to come out of the water a little quicker.
I am adding 380 tabs this winter, and trying to decide whether to add boxes to set the props back farther (or convert to Arnesons).
It's really tough to compare apples to apples (fuel load, water/air conditions, etc.), but I think I picked up at least a couple MPH with the shorties.
The downside is that the props slip more getting on plane, but frankly, the slipping is probably saving them with the torque I have. Also, in the rough, the do seem to come out of the water a little quicker.
I am adding 380 tabs this winter, and trying to decide whether to add boxes to set the props back farther (or convert to Arnesons).
Last edited by UrbanDisturbance; 01-05-2011 at 06:45 AM.
01-05-2011 | 01:28 PM
#18
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Joined: Sep 2001
Posts: 594
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From: 273.76 miles from Havasu
I have GT Performance 750's, so I am on the edge with the XR's.
It will do 80 under almost any conditions, and mid-80's with light load and good water/air. I think there's a little more in her with the setup (and maybe a little more boost...lol)
5,600RPMs x 1.5 ratio x 28" props = 84MPH @ 15%slip
I put new motors in last year...now I'm debating putting anymore money into it, since I'd like to go bigger in the near future. Do I put the boxes on? Arnesons? Herings?
Just not sure right now...lol.
It will do 80 under almost any conditions, and mid-80's with light load and good water/air. I think there's a little more in her with the setup (and maybe a little more boost...lol)
5,600RPMs x 1.5 ratio x 28" props = 84MPH @ 15%slip
I put new motors in last year...now I'm debating putting anymore money into it, since I'd like to go bigger in the near future. Do I put the boxes on? Arnesons? Herings?
Just not sure right now...lol.
01-05-2011 | 08:47 PM
#20
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Joined: Sep 2001
Posts: 594
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From: 273.76 miles from Havasu
It just would be nice not to worry about breaking drives...maybe I should swap out the uppers for Imco SCX's and call it a day.
