Quote:
Originally Posted by G228msport
I did stage 1 jb4. Pretty awesome indeed
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Initially I was dead set on doing a stage 1 jb4 however after reading a few of the recent articles I'm sort of confused. JB claims this tuner increases 0-60 times from 5.4 to 4.9 however Car and Driver's recent article claimed to get 4.9 from stock. Edmunds recent review claimed to get 5.1 from stock. So my question is are the gains that JB claims due to the tune or simple a result of BMW underrating their engine? G228 since you have actually installed the tune can you give me your before/after perspective?
Thanks!