I usually leave it on for the full pass. Was using it to spool for awhile but lately I've played with the tune and got it to spool quicker so I just turn it on just after I leave. As small of a shot that it is, it doesnt really change the AFR on my car. Combo is: 400 block. 4.18 bore, 4" stroke. #96 heads. Icon dished pistons, h-beam rods. Comp cams solid flat tappet. Home built logs with cheap Ebay GT45's. CSU blow thru on e85. Been 9.14@153 in my street driven 71 TA @3650 lbs. Hopefully get in the 8's this wknd.
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