The 1M does not have high flow cats or Larger Turbos

[martymil]

One of my old stock turbo logs, completely maxing them out.

They would not have lasted log if pushed this hard but I wanted to know what they where capable off

330rwk on e85


https://datazap.me/u/martymil/log-15...0&data=1-4-5-8

As you can see the wgdc back those days was pwm and its completely maxed

Shaft speeds are off the chart

What i'm trying to show is that I never seen stock turbos make this much boost, period.

I've only been able to replicate these kind of boost levels with stock turbos on 1m's

DISCLAIMER

DO NOT TRY this kind of boost levels as your turbos will not survive long, this was for testing purposes only

[JB4-335]

Originally Posted by Rob@RBTurbo

OP is correct in that there is no difference in 1M turbos from any of the other N54s. Most of the "meaningful" changes in PN over the years were simply due to attempts at making the wastegates better.

Having tore apart at least 25 sets of 1M turbos over the years, rest assured they are nothing special.

Rob

Thanks for clarifying this Rob. I think most of us knew this but it's good for Marty to also understand that they are all the same turbo's with just newer part numbers.

I've raced a 1M with very similar mods to my 335i and we were both running 21psi of boost and ethanol. My car was consistently faster every time.

[martymil]

Well I finally tracked the bloke down which had the smaller inlets.

What he failed to tell me was that he brought his turbos of ebay out of china.

God knows what he has but hey are definitely not oem hence why he needed inlets
because the stock ones did not fit.

I wish these blokes would say something before hand.

I'm still not convinced there was no internal changes from the first turbos bmw
released to the current crop judging from the boost levels that are achievable compared
to the old versions.

[Rajvosa]

So the downpipes, do 1M have higher flowing cats than 135/335 or they the same units?

[martymil]

They definitely do not look the same, camera cant take a picture of the cat but the difference looks tiny

Definitely different as the cats fitted to the 1m are only fitted to the 1m from the part numbers still to today

[vtl]

Originally Posted by martymil

Well I finally tracked the bloke down which had the smaller inlets.

What he failed to tell me was that he brought his turbos of ebay out of china.

God knows what he has but hey are definitely not oem hence why he needed inlets
because the stock ones did not fit.

I wish these blokes would say something before hand.

I'm still not convinced there was no internal changes from the first turbos bmw
released to the current crop judging from the boost levels that are achievable compared
to the old versions.

So basically you were wrong

[SIN-CAL]

And if they hold higher boost I wanna know what Ebay page!

[JB4-335]

Originally Posted by vtl

So basically you were wrong

Could it be??????

[xQx]

Originally Posted by SIN-CAL

And if they hold higher boost I wanna know what Ebay page!

OEM turbos can hold 30psi .... just not for long

[woosh]

This thread has the most action this sub-forum has seen this year lol

[titium]

Originally Posted by woosh

This thread has the most action this sub-forum has seen this year lol

moderators are coming down on it. looks like Marty's banned lol

[ilikebmxbikes]

It's funny how people think because the PN is different that it means a performance upgrade.

[UR25IO]

Haha.. what a banana 🍌😂😂😂

[terminator335i]

Originally Posted by woosh

This thread has the most action this sub-forum has seen this year lol

True lol...



Btw what happened to Tim1M build thread ?
I was also enjoying that discussion

[BMWhoarder]

Originally Posted by titium

moderators are coming down on it. looks like Marty's banned lol

Maybe i'll start frequenting the board more often now