300xs and 28 Skater

Old 03-13-2007, 12:14 AM
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Originally Posted by BRD View Post
Do these require 93 octane ?
91 min.
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Old 03-13-2007, 07:31 AM
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call the double r guys in canada.....they have set up acouple fast 28's with 300's
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Old 03-13-2007, 09:32 AM
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TOPS those were X motors not the XS motors.... and they weren't fast compared to some of the US 28 Skaters!

RT
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Old 03-13-2007, 09:57 AM
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Twin Modified motors( 2.5's and 300x) have pushed 28 Skaters over 125.

My question is where do the new XS motors stand in this comparison?

T2x
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Old 03-13-2007, 10:59 AM
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Originally Posted by dan lawrence View Post
I have 48hrs

12hrs over 6 grand the motors are awesome. fuel efficient durrable.

Only issue is that they start to shut down at 6150 and go into gaurdian at 6300. I would imagine with the 1.62 gear ratio you will run out of prop like me.


great engines.

Dan
Dan,

I am going with 1.62 gear ratio, 14 1/2 x 32 cleaver 3 blades. When Jim was at at the Powerboat Mag test for the 30 skater, they ran 32s, but Jim & I are hoping we run out of prop and plan to try a 34.

Frank F.
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Old 03-13-2007, 01:08 PM
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Default 300xs

My boat is runing 109 full of fuel or empty with 15x34 cleavers stock. I saw 112 on a flat calm day.


your boat easily will turn the 34's



The boat ran 118 with the 280's 116 everyday so I know more speed is in it.

dan

Last edited by dan lawrence; 03-13-2007 at 01:16 PM.
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Old 03-13-2007, 01:34 PM
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Originally Posted by dan lawrence View Post
My boat is runing 109 full of fuel or empty with 15x34 cleavers stock. I saw 112 on a flat calm day.


your boat easily will turn the 34's



The boat ran 118 with the 280's 116 everyday so I know more speed is in it.

dan
Dan So as of now the 300xs lost app.5mph compared to the 280ros ? Did the boat gain weight as a result of the pleasure conversation?
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Old 03-13-2007, 01:52 PM
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Default 300xs

I have not weighed the boat. I don't think it is slower because I am on the rev limiters with the 34's. The motors stop making horsepower at 6100-6150 cylinders are flooded oil. The efficiency of the boat carry the boat to 6300 and the motors go into gaurdian mode.


If I had a set of 36 pitch props the boat would be faster.




Basically its going to be difficult with the 07 model year motors to see 120 mph with out custom props. I would bet that eventually mercury will increase the rpms on the motors as they get more time.
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Old 03-14-2007, 02:32 PM
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Dan I agree if your motors will pull the same speed empty or full. Horsepower is not the issue. Talk with BBlades about props. Maybe 4blades would help
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