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Old 02-21-2008 | 03:48 PM
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where could I look to price some of these motors?
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Old 02-21-2008 | 05:09 PM
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Originally Posted by JRalston
where could I look to price some of these motors?
You'll occasionally see them here in the classifieds

I think 2004 was the last year they made them,
they were replaced by the 600SCi.
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Old 02-21-2008 | 05:17 PM
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So after changing the head gaskets to better ones.. WHAT are the bolt ons everyone is using to get to 700 - 750HP..

when changing the gaskets, are people changing the compression to increase the boost?

how are the headers (stock), they are not CMI or performance style.

thanks guys for posting your input..

mike
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Old 02-21-2008 | 05:32 PM
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Originally Posted by nordy racer
So after changing the head gaskets to better ones.. WHAT are the bolt ons everyone is using to get to 700 - 750HP..

when changing the gaskets, are people changing the compression to increase the boost?

how are the headers (stock), they are not CMI or performance style.

thanks guys for posting your input..

mike

The headers are CMI's

Mr Hp. covered the mod's a few posts ago.

I'd venture to guess that most of the gains come in
the camshaft area,( using a decent hyd roller)

Stock compression ratio is pretty tame too.
(7.5:1)
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Old 02-21-2008 | 05:37 PM
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Originally Posted by JaayTeee
The headers are CMI's

Mr Hp. covered the mod's a few posts ago.

I'd venture to guess that most of the gains come in
the camshaft area,( using a decent hyd roller)

Stock compression ratio is pretty tame too.
(7.5:1)
sorry. i read it to fast ...

pulling that cam out, i HOPE you don't have to pull the motor (non-stagered).. i'm use to cars and pulling them while there are still in.

what type of gaskets everyone using?
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Old 02-22-2008 | 06:30 AM
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Originally Posted by JaayTeee
The headers are CMI's

Mr Hp. covered the mod's a few posts ago.

I'd venture to guess that most of the gains come in
the camshaft area,( using a decent hyd roller)

Stock compression ratio is pretty tame too.
(7.5:1)
Yes, we bumped the compression to 8.3:1, Brodix cnc ported heads, and custom Gellner/Crane Hyd. Roller camshaft.
Attached Thumbnails Merc 575SC motors..-000_0095.jpg   Merc 575SC motors..-000_0088.jpg  
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Old 02-22-2008 | 12:16 PM
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Originally Posted by mrhorsepower1
Yes, we bumped the compression to 8.3:1, Brodix cnc ported heads, and custom Gellner/Crane Hyd. Roller camshaft.

Dean,
Have you done any with iron heads ( Darts ??) ?

All these pic's are making me re-thinking
my "2 more years" plan

I really don't want to take any more weight out of the
back of the boat. (c.g. issues)
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Old 02-22-2008 | 07:15 PM
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damn i need to upgrade my account so i can see photos....
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Old 02-23-2008 | 06:38 AM
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Originally Posted by JaayTeee
Dean,
Have you done any with iron heads ( Darts ??) ?

All these pic's are making me re-thinking
my "2 more years" plan

I really don't want to take any more weight out of the
back of the boat. (c.g. issues)
All the ones that I have done have been aluminum, but iron would be not much different.
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Old 02-23-2008 | 04:58 PM
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This is great information as my 575's aren't going to last forever. When the time comes I'll either sell or rebuild.
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