It depends on what you're looking for.  Different cam lobes can control
torque and power, depending on height, location and duration of the lobe.
But, the engine will run fine without a change and produce more power with
nothing but the higher compression pistons.

Danny Miller
N 38° 43' 25.7"
W 77° 30' 38.6"

-----Original Message-----
From: David Brien [mailto:BrienAttorney@aol.com]
Sent: Tuesday, November 15, 2011 1:02 PM
To: lml@lancaironline.net
Subject: Piston upgrade to 10:1

Is it required to change or modify the cam when upgrading from 8:1 to 10:1
pistons on an IO360 engine? I spoke to an engine shop and they said the cam
should be changed.


David R. Brien