Quote:
Originally Posted by M3 Adjuster
It makes a lot of sense to me.. I think BMW isn't into releasing proprietary info. 
I DO think there is a new turbo and here is why..
- there is reference to a redesigned manifold/turbo
sounds like a new location/turbo to me
- dyno curves
Did you see the difference in the N54B30TO and N55B30TO dyno curves?
The new motor makes a TON more power at 6500 rpm and is still making power where the N54 has already given up... It looks like it really fully pulls to 7000.... I don't think that's just tuning and beefed up internals..
- everyone doubts BMW M... and they always find a way to throw down a trump card.
As you mentioned.... there is a lot of work done to the M2 motor.... and I can't see keeping the same snail when so much else has changed from the regular N55 - this is BMW M.. |
I agree on this observation, that it does suggest some modifications could have been done to the turbo charger.
I am no expert but how could you otherwise manage to extend the power so high in the RPM-range as compared to the engine in the M135/235i?
Could the boost curve be set so it does not hold itīs power as high in the rev range in the M235i for example? Usually I believe you do that to avoid excessive heat or because the turbo can not flow enough air at high RPMs du to itīs characteristics.
Perhaps someone who knows how M135/235 responds to SW tuning can comment.
Br