Upgraded T04 turbos for less $ than stock! Wtf? Link inside

NoQuarter

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Is the internet now so old that we once again have people lol 'ing over how different dynamometers measure..... different?
 
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Torgus

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Where do I start...

A stock turbo FBO n54 on 93 will never see 500BHP, not in a million years. 400-425 BHP.

Yeah no. 15-20% drive train loss is pretty much accepted numbers across most platforms. 500 crank or bhp 500 x .80 = 400whp. There are plenty of n54 93 dynojet dynos showing 400whp/450tq.

You are saying the most an n54 on 93 will make is 400bhp? Lets use 15% drivetrain loss: 400 x .85 = 340whp. So no n54, according to you, will ever make more than 340whp on 93...yeah...


Dynojets are the highest reading dynos, you guys should get on a Mustang.

False. Dynojets are not the highest reading. There are plenty which read higher. Dynojets are the most comparable in my opinion. You can manipulate MANY dynos to show whatever numbers you want by adjusting the varibles.


1080x808.jpeg.b90f49aa7d7a4908a1bfb05cb089ea49.jpg

So the max, according to you, he could have made is 340whp not the 425 he made. 85 whp delta.


BTW my n54 on a dynapack dynoed 438/487 no inlets or outlets or meth, pure 93 on an old cobb tune. Obviously the dynapak reads higher than a dynojet. It is well understood a FBO n54 makes roughly 400/450whp on 93 and a tune.

Mustangs and dynojets create their numbers differently because they are different types of dynos. With mustangs you have to accurately eneter in vehicle weight and then speed a 50mph iirc. Easy to fuge the numbers on any dyno if you really want to, I believe dynojets are the hardest to fudge. You put the dynojet in shootout mode. Shootout mode is meant to be used to compare figures between cars. It locks the roller ramp rate, and it can't be modified at all, so you can be sure that any car measured with it can have its power accurately compared with any other one tested with it. Now, from what I've heard, it adds around 10% to what you would normally get on a properly set up dynojet. But good to use to compare with.
 
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typedRew

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Is the internet now so old that we once again have people lol 'ing over how different dynamometers measure..... different?
all trends take about 20-30 years to come full circle, so yes, it is 2000 again
 
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Threetirtyfive

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That dyno is half believable Torgus as it says HP (Horsepower) not at the wheels, the valves, the exhaust or anywhere else.
Just because as car is strapped onto a dyno that measures from the wheels doesn't mean it states WHP. Oh my god, nevermind.

I'll say again, a stock turbo n54 FBO on 93 octane will NEVER make 500hp without any other octane adders. This is just American dick waving i'm sorry.
 

Torgus

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That dyno is half believable Torgus as it says HP (Horsepower) not at the wheels, the valves, the exhaust or anywhere else.
Just because as car is strapped onto a dyno that measures from the wheels doesn't mean it states WHP. Oh my god, nevermind.

I'll say again, a stock turbo n54 FBO on 93 octane will NEVER make 500hp without any other octane adders. This is just American dick waving i'm sorry.

You think that dynograph is showing HP at the crank and not the wheels. Is that correct? I just want to be clear I understand what you are saying.

I could give a flying fuck what stock twins make in all honesty. This platform is now 14 years old, it has been proven many many times that on 93 you can expect 400/450 on a dynojet. It's a given, there is so much data which proves this to be the case. An N54 stock twins on 93 makes 400/450 w/ a custom tune on a dynojet without inlets, outlets, headwork, or cams, all would add a fair amount to the peak numbers. Period.

The fact you think the most the car can make is 400bhp or 340whp is just comical. The 1/4 mile times and trap numbers on 93 stock twins don't add up to a car making 340whp. Sorry.


https://www.e90post.com/forums/showthread.php?t=416797&page=34 <--34 pages backing up what every knows and only you disagree with:


Here is another:
Did 436/509 a while back on my wifes car.
FBO (+inlets), 93 octane only.

Graph looks like shit for reasons i didnt have time to figure out, only did 5-6 runs. Car previously did ~410/450 before inlets and downpipes.

laura%2Brun%2B20.jpg


You are not still salty about getting your asses kicked all around the world right? j/k
 
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Threetirtyfive

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Maybe you should question your 'reliable' base dyno being a dynojet.

A standard 335i on a Dynojet makes over 300hp I believe? (some even 330 whp) Again complete BS if believe to be Wheel horsepower.
 
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Threetirtyfive

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This has been debated on car forums for the past 20 years. There's no magic in the usa that means all cars automatically with exactly the same mods and exactly the same octane fuel magically make the same power in whp that we make here as bhp. Google if you wish, otherwise stick with your feelgood numbers.

To add to this mhd, based from Germany quote in flywheel hp. Magically in the usa its wheel horsepower on a dynojet and add some. Don't you have even the slightest bit of cognitive dissonance in why the numbers in Europe, again on a decent dyno, are your whp numbers but in bhp?

It works both ways if you bring your massive US wheel horsepower car to the uk and dyno on a decent dyno you'll see your wheel horsepower will become flywheel break horsepower and take off some.
I can only say it's willful ignorance if you don't see otherwise.
 
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NoQuarter

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So the discussion here is about measuring power from the wheels sitting on the dynamometer and noting it as power at the engine?
 

typedRew

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if i see a dynograph from someone, its wheel horsepower. because thats what is turning the drum. im normally pretty positive most people aren't removing their engines to get their dyno graphs done.

i dont need the readout to say it
 

Threetirtyfive

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You should read about something called correction factor.

You're providing the stock argument "how can a dyno that reads at the wheels not show wheel horsepower". Smh honestly.
 
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fmorelli

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first problem is quoting numbers off a dyno dynamics

may as well throw a dart at a board with random numbers stuck to it

the 'engine power' calculations you guys do off of a dyno boggles my mind, why put even more variables in the mix? you're just guessing the driveline loss and throwing it on the dyno number that is already variable based on the dyno you're using. i dont get it, just quote the number it measures instead.
Given a variety of posts on this thread, I'm sure you're not completely surprised at everything you just noted :tearsofjoy:

Filippo
 

typedRew

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You should read about something called correction factor.

You're providing the stock argument "how can a dyno that reads at the wheels not show wheel horsepower". Smh honestly.
You’re saying a weather correction factor is somehow the same as just guessing at the driveline loss for every vehicle?

ive always ran my cars with that turned off because I only want to know what it made on that exact pull, but that still seems a bit of a reach.
 

rev210

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Dyno debates/arguements happen all over the world every day, If your chosen field of competition is dyno shootouts at car shows , then thats great. In this case there are zero prizes I am aware of for having the highest dyno sheet for hybrids. Even contending chinas are equivalent or comparable or not..the debates are dibble. Blah blah .. stock turbos 500rwhp , hybrids are eleventy billion. Message from the real world care factor zero.

If you have invested in turbo upgrades in the pursuit of performance then it should show up in the times pure and simple. Draggy, 1/4 , 1/2 , 60-130 , roll racing ,racing on a circuit. Basically, gapping other peoples cars , whatever they are.
When you hear people say after getting gapped or running a 'meh' time - "yeah but my car couldnt get traction or it had timing corrections or (insert all other racing excuses) but, it has a 650rwhp dyno sheet so is just as fast as your car..." you are then under unversal laws of car enthusiasts allowed to rip on them with any car related insult that seems most comical . Like suggesting they buy a "650rwhp onboard" sticker so least when they lose they dont need to explain anything.

Dynos - tuning tool. Track - proving tool
 

Threetirtyfive

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You’re saying a weather correction factor is somehow the same as just guessing at the driveline loss for every vehicle?

ive always ran my cars with that turned off because I only want to know what it made on that exact pull, but that still seems a bit of a reach.


The best dynos measure drivetrain loss on the dyno, its not calculated, it measures the loss from engine to wheels as you coastdown.
 

b4llistic

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EDIT: Thanks your finding and reading my post. Unfortunately, Spoolstreet is no longer a neutral platform where we can have honest discussions on subjects and products freely.
For this reason I have deleted all information I posted on the forums.
 
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ajpagosa

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So this just popped up on eBay:

Used/ Parts not working TD04L 17T Billet6+6 Turbos For BMW N54 E90 E91 E92 335i



"Note: This pair of turbos are used.
The front turbo it seems like the nut holds the turbine came off backed up and the cartage is all lost and the fins got shaved from the play of screw missing
The rear turbo is in good condition, it can work well
No warranty, No warranty. Please consider carefully before buying."
 

wtf2

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Jun 15, 2020
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curious as i pulled the trigger for viv 17t, besides getting the turbo kit from ecs tuning to get these bad boys installed anything else recommended to do?
like getting them balanced? does anything on the turbos need to be "upgrade" or adjusted before install to get better reliability/longevity out of them?
 

b4llistic

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EDIT: Thanks your finding and reading my post. Unfortunately, Spoolstreet is no longer a neutral platform where we can have honest discussions on subjects and products freely.
For this reason I have deleted all information I posted on the forums.
 
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