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GAFB
Join Date: Dec 1999
Location: Raleigh, NC, USA
Posts: 7,842
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Hijack:
John, I'm looking at a dilemma on an engine I'm building right now. This is not the 10.5:1 monster I've previously discussed, but a warmed-over "small budget" T motor. I've got Crane 288 cams, 2.2T pistons which have been relieved to deal with the wild cam and shaved heads. Compression is calculated at 9.5:1.
Issue: If the T heads really are 32mm on the intake, then I calculate I am going to just squeak by on intake speed at 100 m/s. However, if they are actually 29mm as some have reported, it looks as though I may be outside the recommended speed range at ~120 m/s. What will the potential impact of this situation be? I'm loath to spend additional money modifying this engine, since this was supposed to be my budget rebuild (yeahhh right).
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Several BMWs
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