afr 225 question
03-24-2009, 03:42 PM
#2
People have made lots of power with AFR 225's N/A and boosted.
I spoke with AFR about putting their 225's on my 403 LS2 not long ago.
You have three options:
Small bore 65cc
Large bore 62cc
Large bore 72cc
They recommend the large bore heads for anything over 3.9xx bore as the large chamber unshouds the valves and helps flow.
They don't recommend milling the 72cc version to less than 65-66cc.
Hope this helps a little.
I spoke with AFR about putting their 225's on my 403 LS2 not long ago.
You have three options:
Small bore 65cc
Large bore 62cc
Large bore 72cc
They recommend the large bore heads for anything over 3.9xx bore as the large chamber unshouds the valves and helps flow.
They don't recommend milling the 72cc version to less than 65-66cc.
Hope this helps a little.
03-26-2009, 06:55 PM
#4
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I had my AFR 225's milled to 66cc for my 402. Tony at AFR did a mild rework of the ports. I also added lightweight intake valves and the upgraded 8019 springs.