Quote:
Originally Posted by
WeaveMcQuilt
Can you explain why we need to block the AIS? I'm not quite sure I understand that.
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the AIS lets air from the air box into the exhaust to burn any un-burnt
fuel that enters the exhaust...
the dyno takes the AF reading from the exhaust so any air the enters the exhaust will increase the 02 in the exhaust gases & give a higher 02 level that the dyno will be reading..
block it off to get a true AF reading...