[e.n335]

Hi

As known, the 335i provides 0.6 bar of maximum boost and adds up to 0.2 bar for compensating altitude. This leads me to the assumption, that the turbos are spec'd at least for min. 0.8 bar, which are 11.6 psi.

Vishnu says that boost pressure is 10-11 psi with the factory exhaust and 11-12 psi with the upgraded exhaust. Is the ECU still adding up to 2.9 psi boost for altitude compensation ?

If not, this would mean that with the PROcede the turbo's run all time within the BMW spec's

Any thoughts ?

Cheers
Eugen

WANTED: Shiv or 335i PROcede owner with boost gauge and high mountain

[teknochild]

the amont of boost put out of the turbos does not = the amount of boost into the cylinder

say at see level is 1 psi air pressure and the turbo is putting out 10psi, thats 11 psi

in the mountains 0 psi turbo puts out 11 psi = 11 psi

thats obviously not real figures, its just to get the concept across

[Insider]

If you look at this thread http://www.e90post.com/forums/showth...hlight=boulder it shows a further gain of power over stock with the Procede at Boulder, CO which is 5,400ft above sea level. So clearly the car is adding additional boost at that elevation with the procede or the car wouldn't have made additional power over the stock dyno.

[e.n335]

@ teknochild: thank you for explanation. This means, everytime you talk about boost it's the cylinder boost pressure ?

@ Insider: thank you. clear now.

[BoostedBMW]

Yes, usually when you are talking in terms of boost, its what you are reading at your intake manifold, not the turbo.

[e.n335]

So with the PROcede the overall boost system will have to provide ~ 30% more boost than stock. Is such a boost increase a

- consevative
- adequate
- aggressive

turbo tuning design ?

Cheers
Eugen

[RiXst3r]

Procede actually uses closer to 13 psi according to shiv... 12.5 I think

Eurobahn Turbo Tuner uses 11psi

[RiXst3r]

Originally Posted by Insider

If you look at this thread http://www.e90post.com/forums/showth...hlight=boulder it shows a further gain of power over stock with the Procede at Boulder, CO which is 5,400ft above sea level. So clearly the car is adding additional boost at that elevation with the procede or the car wouldn't have made additional power over the stock dyno.

Originally Posted by eugen.niederreiter

@ teknochild: thank you for explanation. This means, everytime you talk about boost it's the cylinder boost pressure ?

@ Insider: thank you. clear now.

I was under the impression that this gain was because of SAE correction, which over-corrects, because of the turbos also compensating...

[e.n335]

Originally Posted by eugen.niederreiter

So with the PROcede the overall boost system will have to provide ~ 30% more boost than stock. Is such a boost increase a

- consevative
- adequate
- aggressive

turbo tuning design ?

Cheers
Eugen

I asked thus I'd prefer a more adequate PROcede map as of today. I will get my new e93 in 6 weeks and ordered a PROcede. Vishnu does not know much about EU ECU's. I want to play it save. In worst case I can switch to stock map and wait until issues will be sorted out / solved.

What would you do ?

Cheers
Eugen

[teknochild]

Originally Posted by Insider

If you look at this thread http://www.e90post.com/forums/showth...hlight=boulder it shows a further gain of power over stock with the Procede at Boulder, CO which is 5,400ft above sea level. So clearly the car is adding additional boost at that elevation with the procede or the car wouldn't have made additional power over the stock dyno.

i think his question was that since the turbo puts out up to x amount more boost in the mountains then that meens the engine is running the same at sea level as it is in the mountains, thus there is no issue with reliability of the engine as its engineered to handle the extra boost

but we know thats not how it works

[Evo8MRto335I]

Originally Posted by Insider

If you look at this thread http://www.e90post.com/forums/showth...hlight=boulder it shows a further gain of power over stock with the Procede at Boulder, CO which is 5,400ft above sea level. So clearly the car is adding additional boost at that elevation with the procede or the car wouldn't have made additional power over the stock dyno.

I know what you mean but this is a delicated issue because while the ECU is making the turbos to boost more the altitude kills the performance by providing thiner air.

I guess that the testing done on the car from Boulder, Colorado was done in cold weather. That is the only way this whole thing makes sense.

my .2c