Originally Posted by
myburb
I have run my mild mod 454 in open loop for years now. The motor is much smoother, allows me to have highway lean cruise and pull down with converter locked. I have intake air temp incorperated so I don't need to change my tune from summer to winter. I use a 7427 and if I go much change in altitude I have a closed loop chip I put in. One of the biggest things with a open loop tune is it has to be correct. No sloppy ve table.
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