What is the most power people are getting from their stock Turbos with a tune?

VR-TECH

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Jan 13, 2018
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2013 BMW 135IS
I am starting in phases the transformation of my 2013 135is slowly into a 1M coupe. Definitely thinking on getting the Speedtech stage 3. For now, I will start with a MHD tune maps. That said, I like to gage the power that can be subtracted out of the stock hardware. What is the most HP and tq people are getting out of their stock turbos before upgrading them.

Please state the Original spec then the mod numbers with the tunes involved
 

Bmwfixerguy1

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Jun 5, 2017
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07 335i MT
Well for starts you have an N55 car not an n54 car so tuning and mods a a little different. You have 1 turbo not 2. I'm not totally sure have far people are making a stock n55 turbo but to transform it into a 1M replica you would have to do a motor swap for starters lol
 
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VR-TECH

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Jan 13, 2018
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2013 BMW 135IS
Well for starts you have an N55 car not an n54 car so tuning and mods a a little different. You have 1 turbo not 2. I'm not totally sure have far people are making a stock n55 turbo but to transform it into a 1M replica you would have to do a motor swap for starters lol
Not trying to do a Replica. I use to own an M2 and I like the power delivery of the n55. They are quite reliable so, basically I like the looks of the 1M which is why the body conversion. I will probably upgrade the turbo, but I am interested to know what peoples gains are with the stock hardware
 
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ap485

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Nov 27, 2017
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2011 BMW E92 335i
360-380 hp / 430-450 tq is the norm on a stock turbo on a E-Series N55 FBO with good octane and good tune.
 
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VR-TECH

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Jan 13, 2018
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2013 BMW 135IS
Very cool. So basically not a huge gain on HP but the TQ is quite dramatic
 

Johnny Lehti

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Jan 11, 2017
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I got 350 whp and 500Nm with JB4, Wagner sports cat and IC, 30% ethanol and premium fuel, 2,5" exhaust. 400 hp and 570Nm at the crank
 

Twisted Tuning

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Oct 25, 2016
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N54 and N55 Cars
just our OTS E30 tune is putting up 360-370whp with mid 400s of torque. I've made 398whp on stock turbo with E30. in the next month i'll be pushing the stock turbo of the N55 E-series PWG to low 400whp area. Or at least kill it trying. Installing my Direct port meth kit. and go from there.

But the Speedtech S3 kit is a nice upgrade.
 
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