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Old 05-03-2008 | 10:23 PM
  #13  
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downunder
 
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From: Adelaide, AUSTRALIA
Default RE: Engine timing profiles.

ORIGINAL: JB COMP
Oh man, I forgot to time the SPI, well I'll have to do that tomorrow. I think the SPI is suppose to be around 70-80 degrees of duration.
Oops, a couple of posts came while I was typing that last one .
If by SPI you mean sub piston induction...the duration should be anywhere from zero to -360 degrees . In other words none!