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

[VR-TECH]

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]

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

 

[VR-TECH]

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

 

[luchocamp]

more or less
N55 stock turbo 400hp
N55 PS1 turbo 450hp
N55 PS2 turbo 550hp
N55 ST3 turbo 650hp

 

[ap485]

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.

 

[VR-TECH]

Very cool. So basically not a huge gain on HP but the TQ is quite dramatic

 

[Johnny Lehti]

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]

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.