N52 Swap

[Staszek]

Great thread! What master and reservoir did you use with the E90 booster? You think it would fit with the S54 like it did with your N52?

[wazzu70]

the bed plate wont stop the crank torsionally flexing but the new oil pump drive system will dampen out the vibrations so the pump doesn't see as much of the vibrations

You are right TV is torsion along the central axis. I was thinking of crank snout movement which is a bending moment. The two are not the same but I was lumping crank deformation all under the same category :(

The bedplate increases rigidity to hold the crank in place better which should help alleviate some of the issues seen on previous BMW I6 engines.

[parkerbink]

Great thread & work. Congrats!

[digger]

The bedplate design for the crank case is a huge advantage for an I6 engine. Im surprised it took BMW so long to implement. Without the nose of the crank dancing around at higher rpm there is much less chance destroying the oil pump (let alone main and rod bearings).

the bed plate wont stop the crank torsionally flexing but the new oil pump drive system will dampen out the vibrations so the pump doesn't see as much of the vibrations

[nando]

The N51 only came in SULEV 328's. But its good for harvesting the 3-stage from. :p

[2mAn]

The engines are identical. Its just a different tune.

No, they arent hard to find. I paid $150 with DISAs.

From what I've read the N51 has lower compression and comes with the DISA already... seems like an oddball

[nando]

This is the difference between a 128i and the others that are 3.0si? or is there more to it



Is it hard to find the 3 stage manifold?...

this is the kind of stuff that I do when I WANT a distraction... Im supposed to be studying

The engines are identical. Its just a different tune.

No, they arent hard to find. I paid $150 with DISAs.

[Caperix]

tapered rods, composite magnesium block, crank girder, electric waterpump..

the VANOS is pretty much indestructible BTW. At worst you might have to clean the solenoids once in a while or replace the screens if your engine is full of sludge.

I would not say indestructible, the early engines used tamper proof aluminum bolts to hold the gear to the adjuster that break off. There was a recall to replace the bolts with standard torx bolts. The crank is not keyed so the crank can spin out of time from the cams. The early cam seals had a fragile clip that could break and damage the head/exhaust cam carrier. The n52 is not a bad engine it just has its own unique issues. I'm not a fan of the electric water pump, but I think the only solution to that is a s55 block.

[2mAn]

lol. Stock N52B30OL is 255bhp, 265bhp in 3.0si form..

This is the difference between a 128i and the others that are 3.0si? or is there more to it

I offer a free tune for 128i to 130i (3 stage) swaps.

Is it hard to find the 3 stage manifold?...

this is the kind of stuff that I do when I WANT a distraction... Im supposed to be studying

[nando]

Thats an impressive 8% drivetrain loss....

Ive been tempted to get a 128i lately because I really dont want to do swap the motor

Im guessing the 128i would need the intake manifold right?... I almost bought one a few years back but it was the SULEV which I think is different enough to be labelled a N53 or something

I offer a free tune for 128i to 130i (3 stage) swaps.

[nando]

lol. Stock N52B30OL is 255bhp, 265bhp in 3.0si form..

[2mAn]

At the wheel, so about solid 260 hp with basic bolt ons, but it is not the HP that is impressive, it is the flat torque that starts way early

Thats an impressive 8% drivetrain loss....

Ive been tempted to get a 128i lately because I really dont want to do swap the motor

Im guessing the 128i would need the intake manifold right?... I almost bought one a few years back but it was the SULEV which I think is different enough to be labelled a N53 or something

EDIT: Correction, its a N51

[DesertBMW]

240whp with headers, intake and tune!

At the wheel, so about solid 260 hp with basic bolt ons, but it is not the HP that is impressive, it is the flat torque that starts way early

[wazzu70]

The bedplate design for the crank case is a huge advantage for an I6 engine. Im surprised it took BMW so long to implement. Without the nose of the crank dancing around at higher rpm there is much less chance destroying the oil pump (let alone main and rod bearings).

[AWDBOB]

240whp with headers, intake and tune!

https://www.youtube.com/watch?v=LZSS8u-s88A