General Comparison Merc 575's vs 525's
11-01-2007 | 02:54 PM
#12
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Joined: Dec 2004
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From: Newbury Park Ca
Looked at a used boat a while back with the 575 package, the things I didn't like were the old school flat tappet cam, not roller, and the
fuel system, though FI , was old school throttle body, not the most desirable for future modifications.
fuel system, though FI , was old school throttle body, not the most desirable for future modifications.
11-01-2007 | 06:53 PM
#14
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From: Manhasset, NY
Active.......At first I almost didn't buy my Sonic because it had the 575's.......after a lot of research on OSO I went with them........and man am I glad I did......nothing beter then hearing those blowers kick in (whine) when getting on the throttles.......all I did was buy an extra blower and have them all rebuilt one by one....better to be safe then sorry. Other then that it is typical maintenance.......... are you looking at something with 575's.......
11-01-2007 | 07:16 PM
#15
I hate the winter!!
Joined: Jul 2001
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From: long island, new york
11-02-2007 | 04:15 AM
#16
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From: Manhasset, NY
HaHaHa....lol......thanks Vin.......I know I don't go nuts but every once in a while I do get on them.......and besides just getting on plane sounds great.............
Last edited by Here's Johnny; 11-02-2007 at 04:25 AM.
11-02-2007 | 06:24 AM
#17
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Joined: May 2004
Posts: 1,263
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From: Auburn, New York
575s w/ arizona upgrade + superchiller push my 01-42' lightning well into 90mph range. Easy gains for not much money. Still start, idle and run like EFI motors. After 4 years, nothing negative to say about 575 SCi's. Fuel economy is not nearly as bad as spoke about.
What gaskets are being used when raising the boost ?
11-02-2007 | 12:49 PM
#19
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From: IN & KY
Yes I did upgrade gaskets. With the chiller, the boost as I understand doesn't necessarily go up because the engine volume is increased. My gauges still read between 5 and 6 at WOT which is what they read before the upgrade, or least very close.
11-02-2007 | 12:57 PM
#20
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Active.......At first I almost didn't buy my Sonic because it had the 575's.......after a lot of research on OSO I went with them........and man am I glad I did......nothing beter then hearing those blowers kick in (whine) when getting on the throttles.......all I did was buy an extra blower and have them all rebuilt one by one....better to be safe then sorry. Other then that it is typical maintenance.......... are you looking at something with 575's.......
