N54 Turbos

[Dmonic1]

Does anyone know what sizes they are...? and whats the maximum boost? stock car of course!

 

[George Smooth]

They are TD03's. If all is stock I would not go higher than 1bar at altitude with pump fuel.

 

[Richard H]

I think they are TD03. Not sure about boost think 0.6bar stock.

 

[Dmonic1]

Yip correct - found some interesting info in the NET.. TD03's boosting at 0.4bar each (5.8Psi)

 

[Twinz]

8psi stock max boost. See my pics:
http://www.bmwfanatics.co.za/showthread.php?tid=2670

 

[///MOS1TED]

Just boost that car DMONIC......stop thinking about it....

:thumbsup:

 

[Dmonic1]

LOL....

 

[zainm3]

is 1bar boost reliable for everyday use and pump fuel [95 octane] and whats the highest u could take the boost up to at sea level just for a few runs not everyday use with and aftermaket intercooler

 

[George Smooth]

is 1bar boost reliable for everyday use and pump fuel [95 octane] and whats the highest u could take the boost up to at sea level just for a few runs not everyday use with and aftermaket intercooler

I Zain, 1bar is very reliable in my opinion. The cooler is not really the restriction to running higher boost. Generally as heat build up and heat soak the ECU cuts the boost back by itself. To run higher boost a must is doing the downpipes to a minimum of 2.5 inches. You can then run 1.15 without a cooler with a conservative timing map. If at that stage you want maximum power a cooler will have to be added into the equasion.

 

[///Marksman]

is 1bar boost reliable for everyday use and pump fuel [95 octane] and whats the highest u could take the boost up to at sea level just for a few runs not everyday use with and aftermaket intercooler

I Zain, 1bar is very reliable in my opinion. The cooler is not really the restriction to running higher boost. Generally as heat build up and heat soak the ECU cuts the boost back by itself. To run higher boost a must is doing the downpipes to a minimum of 2.5 inches. You can then run 1.15 without a cooler with a conservative timing map. If at that stage you want maximum power a cooler will have to be added into the equasion.

George, do the 3" DP's help add any meaningful gains? some say its does and others argue that point over at n54tech, something to do with it funneling at the end or some shi*t...

 

[George Smooth]

is 1bar boost reliable for everyday use and pump fuel [95 octane] and whats the highest u could take the boost up to at sea level just for a few runs not everyday use with and aftermaket intercooler

I Zain, 1bar is very reliable in my opinion. The cooler is not really the restriction to running higher boost. Generally as heat build up and heat soak the ECU cuts the boost back by itself. To run higher boost a must is doing the downpipes to a minimum of 2.5 inches. You can then run 1.15 without a cooler with a conservative timing map. If at that stage you want maximum power a cooler will have to be added into the equasion.

George, do the 3" DP's help add any meaningful gains? some say its does and others argue that point over at n54tech, something to do with it funneling at the end or some shi*t...

The tapering of the DP is a non issue. The DP's in a way increase the tiny exhaust housing capability to spool up and maintain higher levels of boost at high rpm which is where our cars suffer.
I found a a 1bar map without manipulating the tuning I got a increase of 9wkw. When keeping the 1 bar peak and feeding higher boost the car gained 14wkw but major power was added at the top rpm range where the power normally falls on its back.
On higher boost levels with a 1.15 peak the car was far happier and safer with the Catless DP's fitted.
On the roll driving there where significant gains with boost reached instantly.
At the track I had to monitor throttle position as this instant boost causes traction issues.
If you are on N54tech have a look for a older post where the 2.5inch has been compared to the 3.0 inch on a dyno and you will see that even between those two sizes there is a power difference.

 

[///M335]

what are the biggest turbo that can be installed, if any?