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How fast MTI 40 with 525's ?

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How fast MTI 40 with 525's ?

Old 03-20-2012, 04:56 AM
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[youtube]http://www.youtube.com/watch?v=RGDNYdVhuZk[/youtube]

MTI running at Smoke On The Water Poker Run

Music sucks on this

I had used somthing more appropriate but You tube changed it

We did not have any engine sounds for this but you can see this boat hauling the mail. Got a little scarry for a minute
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Old 03-20-2012, 05:21 AM
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Do they want $250k with power, no trailer? thats a great deal
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Old 03-20-2012, 11:49 AM
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Possibly someone can shed some light on me. When you use a "Prop Slip Calculator" and plug in the following values for calculating THEORETICAL SPEED of a boat running 525EFI and #6 drives:

Gear ratio - 1:50 (highest allowed ratio for racing orgs)
Prop pitch - 40P (maxium size pitch prop allowed)
engine rpm - 5600 rpm (rev limiter set on stock 525EFI)

In theory you get a top speed of 141 mph, with a 7% slip you would see an actual 131 mph. (if the boat was set up right on the money and ran perfect)

I don't understand how all these other " higher mph numbers" come out without changing one or more of the above variables.

I am willing to learn.
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Old 03-20-2012, 12:48 PM
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gear ratio and props wiill change with higher HP
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Old 03-20-2012, 01:10 PM
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Originally Posted by cdowns
125+
Would that hull be the same as Richie Prince's?


I would Whipple it
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Old 03-20-2012, 01:18 PM
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Hi Wild:

This boat holds a LOTO record doesn't it?. What RPM/ratio/props were used for that?

Thanks,

Tom
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Old 03-20-2012, 01:21 PM
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Change in gear ratio is the usual culprit. I am pretty sure the ratios are as follows: 1.49:1, 1.35:1, 1.24:1 and 1.15:1 so you can see how it can be changed but as you go up in gears you will lose a lot of the punch. My boat has been 153 with 1.35's but with the 1.49's it's 10-15 mph slower but doesn't take 10 miles to get there.


Originally Posted by skaterboy
Possibly someone can shed some light on me. When you use a "Prop Slip Calculator" and plug in the following values for calculating THEORETICAL SPEED of a boat running 525EFI and #6 drives:

Gear ratio - 1:50 (highest allowed ratio for racing orgs)
Prop pitch - 40P (maxium size pitch prop allowed)
engine rpm - 5600 rpm (rev limiter set on stock 525EFI)

In theory you get a top speed of 141 mph, with a 7% slip you would see an actual 131 mph. (if the boat was set up right on the money and ran perfect)

I don't understand how all these other " higher mph numbers" come out without changing one or more of the above variables.

I am willing to learn.
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Old 03-20-2012, 01:59 PM
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Gofastlvr your boat has been over 160 MPH. I've played with alit of different ratios on your boat & it was a fast one.
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Old 03-20-2012, 06:23 PM
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Originally Posted by Reggie Fountain
Gofastlvr your boat has been over 160 MPH. I've played with alit of different ratios on your boat & it was a fast one.
What's in his boat for power?
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Old 03-20-2012, 06:29 PM
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850 mercs.
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