525sc cam specs
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Mark this is out of my 1994 Merc hi-pro book for the HP 525SC 7.4l 454
Lifter type--Hydraulic
rocker arm ratio-- 1.7:1
valve lift intake .530 exhaust .531
Lobe lift intake .312 exhaust .324
Duration at .050 intake 298 degrees and exhaust 306
Bryan
Lifter type--Hydraulic
rocker arm ratio-- 1.7:1
valve lift intake .530 exhaust .531
Lobe lift intake .312 exhaust .324
Duration at .050 intake 298 degrees and exhaust 306
Bryan
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MarineKinetics
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Mark,
It's a 114* LSA on a 109* ICL.
Here is the timing card for that cam.
http://www.cranecams.com/?show=brows...61&lvl=2&prt=5
Bob
It's a 114* LSA on a 109* ICL.
Here is the timing card for that cam.
http://www.cranecams.com/?show=brows...61&lvl=2&prt=5
Bob
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My exhaust is thru the transom, but it is under water. Is this going to be a problem with reversion? I am running Revolution exhaust, and there is a dam built in to help prevent reversion. Thanks for the help guys.
Mark
Mark
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Originally Posted by bpine
Mark this is out of my 1994 Merc hi-pro book for the HP 525SC 7.4l 454
Lifter type--Hydraulic
rocker arm ratio-- 1.7:1
valve lift intake .530 exhaust .531
Lobe lift intake .312 exhaust .324
Duration at .050 intake 298 degrees and exhaust 306
Bryan
Lifter type--Hydraulic
rocker arm ratio-- 1.7:1
valve lift intake .530 exhaust .531
Lobe lift intake .312 exhaust .324
Duration at .050 intake 298 degrees and exhaust 306
Bryan
Wildchild,i'm running almost identical duration(.228/.236 at .050) but with a touch over .600 lift,my motor idles at 10 inches vacuum at 675 rpm's in gear . My exhaust is thru y-pipe and thru transom with water injected right after headers end w/no reversion (but it is a 540),on the cam card for the 525sc crane does reccomend above water exhaust,you'd hate to install it just to find out it won't work,maybe someone out there is running same cam with your exhaust and can shed some light on it (or tell you not to do it)
Last edited by articfriends; 08-31-2004 at 12:48 AM.
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Smitty, you should be critical! I believe wrong information is worse than no information! Here is a scan out of the Merc Hi performance service manual #3
are you saying I should run this cam in my Alcohol Dragster! "JUST KIDDING!
Is the Merc book WRONG, DOH
http://www.offshoreonly.com/forums/a...id=95342&stc=1
http://www.offshoreonly.com/forums/a...id=95341&stc=1
are you saying I should run this cam in my Alcohol Dragster! "JUST KIDDING!
Is the Merc book WRONG, DOH
http://www.offshoreonly.com/forums/a...id=95342&stc=1
http://www.offshoreonly.com/forums/a...id=95341&stc=1
#10
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Lets try this again!
http://www.offshoreonly.com/forums/a...id=95343&stc=1
Sorry if I miss-led anyone, it was late and as I stated the information was from the manual. I never though about double checking God Almighty Mercury Racing!
http://www.offshoreonly.com/forums/a...id=95343&stc=1
Sorry if I miss-led anyone, it was late and as I stated the information was from the manual. I never though about double checking God Almighty Mercury Racing!