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rcmk s-520 has anyone run one of these yet

Old 08-23-2011, 05:27 PM
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grant118
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Default rcmk s-520 has anyone run one of these yet

I am looking at building a large Cat and would like to know if anyone has tried one of these engines yet? How does it hold up?
thanks chris
Old 08-23-2011, 07:49 PM
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oversprayer
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Default RE: rcmk s-520 has anyone run one of these yet

There is a good friend of mine that builds these motors and really goes through them to make them solid. There are a number of things that he does to them. I cant think of all of them but there are some internal parts that need to be replaced with stronger ones and there is a bearing matter that he fixes as well. He has gone through Four of these motors the two he has now are rock solid the big bore one has had about 15 gallons ran through it and starts on half a pull everytime!! he is on Jims and goes by Boss330 you can pm him and tell him Doug sent ya! His boat is a steady 75 mph boat doesnt even really matter the conditions. Here are some pics of it, it is also on youtube. it is an expresscraft Thunderbolt. He also ran this boat in the offshore rigger twin class and one first place! against riggers. and of course I painted it. Hope this helps good luck with your build.

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Old 08-23-2011, 07:55 PM
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oversprayer
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Default RE: rcmk s-520 has anyone run one of these yet

Also I dont know what hull you plan to use but 70 mph crashes with that much added weight in the standard fiberglass hulls just doesnt cut it. He went througha fiberglass hull inno time.you need to go with carbon fiber and possibly add a bulkhead. the pictures here do not show that but we added one later. Havent had a single problem with it since. Remember longer is better.
Old 08-24-2011, 02:57 PM
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Scott Schneider
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Default RE: rcmk s-520 has anyone run one of these yet

Yup ... bad to the bone !!

This video first day testing and hit 78mph ! ... Now into the 80's.
Man what a RUSH !!

[link]http://www.youtube.com/watch?v=WW4xLNFyFug&feature=player_detailpage[/link]
Old 08-24-2011, 04:37 PM
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HendricX
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Default RE: rcmk s-520 has anyone run one of these yet


ORIGINAL: oversprayer

There is a good friend of mine that builds these motors and really goes through them to make them solid.

Hmmmmmm wonder if that is Al Pappito ? ... Yeahhhhhhh he knows his stuff.
Old 08-24-2011, 06:22 PM
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Default RE: rcmk s-520 has anyone run one of these yet

thanks for the link, shes moving and love the end YEA HA
Old 08-25-2011, 05:57 PM
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Default RE: rcmk s-520 has anyone run one of these yet

RCMK 520 I stuffed in a Conquest.


http://youtu.be/sMZbwoqJRIU

Old 08-25-2011, 07:34 PM
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oversprayer
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Default RE: rcmk s-520 has anyone run one of these yet

Yep its All's boat. He has that thing running great. very solid motor with everything he has done to it.
Old 08-25-2011, 09:33 PM
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Default RE: rcmk s-520 has anyone run one of these yet

It is so obvious seeing some video of 520 powered boats .... you sure run out of real estate quick !
Big ponds become humbly too small []
Old 08-26-2011, 12:11 AM
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martno1fan
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Default RE: rcmk s-520 has anyone run one of these yet


ORIGINAL: Scott Schneider

Yup ... bad to the bone !!

This video first day testing and hit 78mph ! ... Now into the 80's.
Man what a RUSH !!

[link]http://www.youtube.com/watch?v=WW4xLNFyFug&feature=player_detailpage[/link]
Very impressive Scott that things moving especially to say its the first day testing lol.
Mart

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