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Old 02-05-2014, 07:32 PM   #1
putnam00
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Join Date: Aug 2012
Location: Grant NE
Posts: 78
anyone running LT1's

I have an LT1 in my 71 Chevy and it doesn't seem to be pulling the MPG's. its has new O2's and I have a 700R4 with a 3.23POSI 12 bolt. Down the Highway at 60 I'm running 1500RPM and interstate at 80 its running 1900RPM

Do you think I just need a better tune? when its not to operatering temp and I do a quick romp it chugs and pops.
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