bmw spool diesel

[darrix]

hi guys i have a bmw 4 cylinder diesel with a biturbo bmw 535 286cv

the car injects almost 98mg.  but the big turbo (k26) does not exceed 2.3 bar.  I was told to spool diesel.

what is it about?

[GTSBoy]

Wow.

[Ben C34]

I would always spool diesel

[GTSBoy]

I would only use it to fire a Gurney's water heater.

[admS15]

The bigger question is, does it dose?

[GTSBoy]

I'm trying to work out if the spool being discussed belongs in the diff or not.

[PranK]

[PranK]

5 hours ago, Ben C34 said:

I would always spool diesel

Surely not on the big turbo?

[30ed32]

6 hours ago, Ben C34 said:

I would always spool diesel

Absolutely, if you're not spooling diesel you're not doing it right.

[darrix]

is there any way to raise the pressure of the big turbo?  I the wastegate of the large exhaust always remains CLOSED.  because it doesn't pressure me

what it is due to.  the engine unzipped or a little diesel?

what the spool is about.  I still don't understand.

Edited July 6, 2020 by darrix

[PranK]

Sorry darrix, you're not being very clear.

I'm assuming you have a twin turbo BMW and that the turbos are sequential (ie, the smalll one spools, then the big(ger) one) ?

What does 'engine unzipped' mean ?

It's been a month since you last posted and I can't see you getting much help if you just throw some questions in here every 4 weeks.

[darrix]

@admS15 I didn't quite understand what you said.  if it's true?  Yes

[darrix]

@PranKHi sorry.  I had problems with the car.  I put the 3 notch head gasket.  I would not like to have lost some compression on the engine

[PranK]

We still need more info. 

I'm not sure if there is another member on these forums with that car and engine though, so you need to be pretty clear.

[darrix]

@PranKvalve 1 and 3 are managed by the geometry map which is completely open at 4200rpm.  while the discharge valve is always closed.  because it doesn't pressure

[darrix]

@PranKwhat do you want to know?  for my problem

[GTSBoy]

I'm pretty certain that no-one here has the slightest idea how a compound turbo system on a random BMW diesel 4cyl engine is supposed to work, let alone how to diagnose a mystery problem with one.

[darrix]

@GTSBoyI do not know what you mean.  but am I wrong?

[darrix]

as already said of how I manage the turbo.  (with the geometry map) since I don't use it.  the k26 has a fixed geometeia.  what am I doing wrong?

[PranK]

What kind of engine management are you using? Is the engine in the original car?