Cam specs for Merc 525 EFI?
#22
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The 500 makes approx. 500-505hp on a true steady state run on an accurate dyno. THe 525HP EFI makes 540-545hp with the same test. Compression is the same, same pistons, crank, rods, etc. The 575SCI makes between 600-605 with the same test. Mercury Racing is always conservative on power ratings while Mercury Marine is usually off. Typically there so called prop hp's are the crank hps, example, the 496Mag HO makes 415-430hp depending on computer cal. The 502 Mags made 415-420hp.
Thanks,
Dustin
Thanks,
Dustin
#29
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JohnB - Glad we could help.
Scarab________34,
Have you LOOKED at the specs for a crane 139741? Besides being hydraulic rollers and having the same lift the two cams don't share any specifications or applications.
Rick232 - as mentioned before, you are correct.
Scarab________34,
Have you LOOKED at the specs for a crane 139741? Besides being hydraulic rollers and having the same lift the two cams don't share any specifications or applications.
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Rick232 - as mentioned before, you are correct.
Last edited by Adivanman; 09-09-2003 at 07:08 AM.
#30
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Thanks for the info. Well that cam is bigger than I thought it would be, especially on the exhaust lobe! You would think since they are running a true header that they might back off of exhaust timing a bit in favor of cylinder pressure, especially since the cr is very conservative considering the aluminum heads. Maybe lowering cylinder pressures is their intent? They are the ones that have to warranty it. One thing for sure, the new Motorola ECM/sensors have it all over the old GM MEFIs'....making civilized big HP for this system a piece of cake. Take Care , Berg