BMW M3 (F80) makes 539whp with just tune & 40% E85 mix

[Mook]

Damn.

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[Mook]

JB4 I guess is -

BMW Performance Tuners & Chips - BurgerTuning.com

 

[RICH17]

Holy crap!

 

[Mook]

At least i THINK its only a tune.

 

[Mr_Roboto]

Ain't nothin to fuck with. Wonder what it put to the rollers stock.

 

[Mook]

There should be a stock dyno thread floating around in this section.

 

[Mike K]

At least i THINK its only a tune.

I bet it is. With just an intake the JB4 tune alone adds 100hp to an N54. If you're on the auto tune map all you do is add in some E85 and it adjusts for it, adding another 70hp depending on how much you add. It's obnoxiously easy and you control it all through the steering wheel controls. The only downside to running just the tune is some wicked turbo lag because of stock downpipes but I'd imagine the M3 has slightly larger downpipes to begin with. 539whp though… lololololol. That's stupid.

I usually put in 6 gallons of e85, do a couple 3rd gear pulls on the highway so it can adapt and bam, I've gone from 400 to 470. This makes me want to upgrade my turbos though.