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Old 04-28-2004, 11:52 AM   #1
John*G
Scooby Newbie
 
Member#: 19562
Join Date: Jun 2002
Chapter/Region: NESIC
Location: VT
Vehicle:
93 Impreza wagon L
Mud

Default Camshaft questions

I have a EJ2.2. Looking into custom ground cams I would like a duration of about 265-275 and run about 11.2 CR. I Noticed Cobb, TWE, Webcam and others all keep their grinds about the same, mostly increasing lift and rate of valve opening. I heard reference to "problems" with too much duration/overlap but I don't know what that means. I imagine possible back pulsations at the MAF which is a little fragile.and overly rich mixtures at the O2 sensor at idle also thepossiblity of ruining the cat in time. Anyone know for sure? I don't really care about CEL's as long as it runs well and I have no emissions testing.
Thanks
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