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2donzi2
09-27-2009, 07:02 PM
anyone familiar with the cam specs on a Merc 420? intake/exhaust duration and lift on the cam, and are they rectangle port or oval port heads? Thanks, Mike

Pismo
09-27-2009, 07:26 PM
Rect heads and holley 9022 800cfm. A Beauty. Dennis Moore says they were "way overcammed"...Too much duration.

rmbuilder
10-06-2009, 10:39 AM
anyone familiar with the cam specs on a Merc 420? intake/exhaust duration and lift on the cam, and are they rectangle port or oval port heads? Thanks, Mike
2donzi2
The 420 Merc camshafts are a hydraulic flat tappet from Crane part # 132561. It rates at :
298º/306º @ .0045”
228º/236º @ .050”
.312”/.324” Lobe
.530”/.551” Valve
114º+5º
Bob

mrfixxall
10-06-2009, 10:43 AM
2donzi2
The 420 Merc camshafts are a hydraulic flat tappet from Crane part # 132561. It rates at :
298º/306º @ .0045”
228º/236º @ .050”
.312”/.324” Lobe
.530”/.551” Valve
114º+5º
Bob
Hey bob i see you finally joined :) welcome aboard!
OK guys if you ever need any special cams ground or any information,this is the guy you need to talk to:yes: he vary vary knowledgeable
mike from chicago.