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Old 09-12-2010, 01:45 PM   #1
cribbie
Scooby Specialist
 
Member#: 184505
Join Date: Jul 2008
Chapter/Region: E. Canada
Location: Ontario
Vehicle:
2003 WRX
Sonic yellow

Default Camshaft degreeing on built heads (non AVCS)

Hey guys, I have been building a EJ22T block with 2.0L heads, +1mm valves, Kelford drag cams etc etc.
I have had my pistons made to have the same deck height as a stock ej20 to be able to use the same thickness HG. I have assembled the long block and wanted to double check my valve to piston clearance and I quickly found out that my intake valves are hitting the pistons. I spoke to my builder and he had mentioned that we can cut the valve reliefs in the pistons a little bit larger or have the Cams degreed to the proper cam card specs which may give us the clearance we need. He highly recommends this route and says there are a few ways in making some small changes to the cam degree without buying adjustable cam gears.
I have spend countless hours trying to find the procedures on degreeing our cams but have had no luck for the boxer engine. For the money invested in peoples built heads I know there has to be someone who could chime in on how to get the most out of this investment.

There have been many older post of members requesting this information as well and i think this should be incorporated in the FAQ.
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Last edited by cribbie; 09-12-2010 at 05:41 PM.
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Old 09-12-2010, 05:38 PM   #2
cribbie
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Join Date: Jul 2008
Chapter/Region: E. Canada
Location: Ontario
Vehicle:
2003 WRX
Sonic yellow

Default

Here are a few pictures of my issue:



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Old 09-12-2010, 05:42 PM   #3
john 1badSTI
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Member#: 77470
Join Date: Dec 2004
Chapter/Region: MWSOC
Location: grove city ohio
Vehicle:
04 sti 10.51@138.5
on e85@ 30psi--spinning

Default

wow those valve reliefs are tiny I would just have the machinist flycut the relief deeper and wider and be done with it.Its not going to take much maybe .060-.080.
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