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-   -   help with estimate of top speed (https://www.offshoreonly.com/forums/general-boating-discussion/12635-help-estimate-top-speed.html)

merlin540 02-01-2002 04:12 PM

help with estimate of top speed
 
how fast do you think my 32 skater will run??
1000hp supercharged engines #4 drives 1.31 ratio with 34 pitch 4 blades i want to see 135mph do you think that is possible. want to turn engine between 6500 to 7000 rpm. thanks to the members of offshore only for the help!!!!!! :D

Scooter 02-01-2002 04:19 PM

Have a friend that has same ratio and pitch with 502 crates just carbs 36'awasome cat and he runs 112mph 5800rpm so you should see it go man go

36spectre 02-01-2002 04:23 PM

My 36 foot cat with a pair of 1000's, number VI dry sumps with 1:33 gears and 17 1/2 35, 5 blades, runs 153 on GPS. Yours should easily run in the high 130's. Good luck and let me know if you have any questions.

Scooter 02-01-2002 04:25 PM

he is difinitly spinning those boys hard
but it takes alittle while to get there depending on the wind to lift the tunnel up

Scooter 02-01-2002 04:29 PM

Otto those five blades arn't cheap, do you think there wroth the money compared to the 4 blades I have 17 1/2 29 #5 drives how much slip do you lose by changing? nice ride

36spectre 02-01-2002 04:32 PM

They really only changed two things,Vibration and handling(handles like it's on rails).

36spectre 02-01-2002 04:33 PM

And yes they were worth it!!

Scooter 02-01-2002 04:35 PM

Thanks Otto i heard they reduce slipage buy 7-8% is that true

36spectre 02-01-2002 04:37 PM

If the boat is already hooked up with the 4 Blades then 6-8 % is rather optimistic.

tomcat 02-01-2002 07:31 PM

Hey Merlin540 - Using your hull and a pair of 900SC in my power vs. speed program I get 145 mph with that pitch and ratio. Assuming ideal slip of 5%, that would happen at 6000 RPM.

There have been a few 32s built with 800SC, but it seems to me they were often quickly traded in by their owners for 36 Skaters. Wasn't there a 32 in a magazine last year with 1000+ HP going 150? Scary.

If you could send me more info on weight, engine specs and speed with original engines and props, I could fine tune my prediction.

Wicked ride man! :D

[ 02-01-2002: Message edited by: tomcat ]


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