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Originally Posted by jgoens
Interesting stuff here. I have a JB4 and have considered a flash but don't want to do the taking out ECU thing. Am wondering what would be the TOTAL gain with JB4 and say AA tune. Also wondering if it might be too much power in putting the power down---with e85 it's almost that way right now.
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You can stack it but gains will be minimal. You still have physical limitations in the turbo and fuel pump. No software or electronic can change that. I would not recommend it unless its because you like the features of JB4.