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575 sci power upgrades ?

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Old 08-08-2010, 01:58 AM
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Default 575 sci power upgrades ?

I'm interestd to know what kind of power upgrades have been done to Merc 575 sci set-ups.

How much boost do they run in the stock / factory configuration ?

Your expereince or redirect to reference info appreciated.
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Old 08-08-2010, 08:18 AM
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I had a set 575 sci in my Top Gun, From what I understand the best upgrade is to actually reowork the motors a little, different cam, different valves, rockers, etc.. If I remember right the boost is only around 5 - 6 lbs or so, if you go any more you will blow the motor up. My motor was reworked and was getting around 650 - 675 HP with a mild cam.
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Old 08-08-2010, 12:40 PM
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Stock boost is about 4#. An innercooler, pulley change and ECM flash will get you to about 650HP.
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Old 08-08-2010, 03:17 PM
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Mine are at about 650 now with stock pully. Best was 715 or so on dyno I had him back down due to NO 93 in OK,
New heads punched out to 509 and just about everthing else.
Call Brad Smith you wont be sorry.
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Old 08-08-2010, 10:58 PM
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Ron Potter built mine up to 700+. They are awesome! New cam, massaged heads, roller cam, pulley, and ECM.
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Old 08-09-2010, 12:00 AM
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something like this?

http://www.youtube.com/watch?v=25XxQ2eiuYg
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Old 08-09-2010, 06:49 AM
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Now where is that smiley face!
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Old 08-09-2010, 07:25 AM
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I have done several of these and we put Dart heads, cam, innercooler, program the ecu and get 730HP.
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Old 08-09-2010, 07:28 AM
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If you don't mind working with an engine builder that is some distance away from you, Tyler Crockett in Michigan.
http://www.crockettmarineengines.com/

Hint: Who ever you choose, get several OSO member recommendations BEFORE you decide. Please don't become a member of the "Beware---Stolen Thread" club. We have enough of those already enlisted.
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Old 08-09-2010, 09:33 AM
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Dean Gellner supplied the stuff for mine
( heads, hr cams/lifters, ECM upgrades)

216-398-8500

They run great
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