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Old 09-23-2010, 02:08 PM   #2
McSpeed
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Join Date: Nov 2009
Location: Connecticut
Posts: 1,073
My Ride: 2005 ZHP TT Stg 1
I think the ITBs are part of what allows the S54 to rev to 8000.
It's easy to make a lot of HP revving to 8000.
The M54 only revs to 6500.

The S54 is also a 3.2 liter iron block with very strong internals vs the M54's 3.0 liter Al-Sil block.
S54 compression ratio: 11.5:1
M54 Compression ratio: 10.2:1
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Last edited by McSpeed; 09-23-2010 at 02:13 PM.
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