Luxury Performance Sedans

You know, this whole breathed on I6 engine thing has got me to wondering. Would it be possible to transplant one of the new mills from the 335i/535i into a late E39 5-Series? Geez, what I wouldn't give to have my old 2002 530i with that mill stuffed under the hood.
 
Best Regards,
Shipo

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• lexusguy (Jan 10, 2007 7:22 am)
  • shipo (Jan 10, 2007 8:15 am)
    • lexusguy (Jan 10, 2007 6:22 pm) and 5 more...

Replying to: shipo (Jan 10, 2007 6:50 am)

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• shipo (Jan 10, 2007 8:15 am)
  • lexusguy (Jan 10, 2007 6:22 pm)
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Replying to: lexusguy (Jan 10, 2007 7:22 am)

Trust me, it's WAY more complicated than a simple blower installation. Consider the following points:
 
1) The engine in the 2002 E39 was the previous style (and in fact many years old in its life cycle) aluminum block with the cast iron sleeves. Decent for its purpose, but hardly as robust as the new aluminum core/magnesium shell composite block that debuted with the introduction of the E90.
2) Factory built turbocharged engines are typically reinforced (over that of the normally aspirated siblings) with the following goodies:
 - 2a) Higher strength crank, rods and pistons
 - 2b) Rod based oil squirters to cool the piston domes
 - 2c) Considerably greater cooling capabilities such as:
 - - 2cA) Larger radiator and the necessary plumbing
 - - 2cB) Additional and/or larger oil coolers and the necessary plumbing
 - - 2cC) Large size intercooler(s) and the necessary plumbing
 - - 2cD) Extra coolant plumbing to the bearings on the turbine houseing to keep them cool, especially at shutdown
 - 2d) Significant software remapping
 - 2e) Revised/more robust valve train
 - 2f) Higher flow intake and exhaust manifolds (2 in the case of the 335i)
 
Did BMW do all of the above to the 335i engine? Probably. Would I trust the (bored out to within an inch of its life) 3.0 liter mill from an E39 to withstand the rigors of a 300 (320-340 by all accounts) HP turbocharging application? Not a chance. While the old 3.0 liter mill was certainly a good and robust engine for its intended output, there is only one word to describe what would happen to that engine when an intake charge 150% of design spec was fed into it. KABOOM!
 
Best Regards,
Shipo

Replies to this message:
• lexusguy (Jan 10, 2007 6:22 pm)
  • shipo (Jan 10, 2007 7:22 pm)
    • uglybear (Jan 10, 2007 8:50 pm) and 3 more...

Replying to: rayainsw (Jan 10, 2007 6:16 am)

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• rayainsw (Jan 10, 2007 1:07 pm)

Replying to: bruceomega (Jan 10, 2007 12:07 pm)

Replying to: shipo (Jan 10, 2007 8:15 am)

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• shipo (Jan 10, 2007 7:22 pm)
  • uglybear (Jan 10, 2007 8:50 pm)
    • shipo (Jan 10, 2007 9:33 pm) and 2 more...

Replying to: lexusguy (Jan 10, 2007 6:22 pm)

"An engine doesn't have to be made out of exotic metals to handle some serious boost."
 
Agreed, however, the old BMW engine was more than a little long in the tooth. Comparing an iron block Toyota mill or or the very high revving S2000 is rather apples to oranges. I've never torn one of the old 3.0 liter BMW engines down so I cannot speak from first hand knowledge, however, as I understand it, its been bored out to the point where keeping three hundred plus HP contained would be more than a little hard on head gaskets and such.
 
Regardless, even if I was playing with one of the new mills I still wouldn't breath on it without a serious internal rework, including a lower mechanical compression ratio. Long story short, the only real way I'd ever attempt this would be to find a totalled 335i with the drive train still intact. Realistic? Probably not.
 
Best Regards,
Shipo

Replies to this message:
• uglybear (Jan 10, 2007 8:50 pm)
  • shipo (Jan 10, 2007 9:33 pm)
    • kyfdx (Jan 11, 2007 10:12 am) and 1 more...

Replying to: shipo (Jan 10, 2007 7:22 pm)

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• shipo (Jan 10, 2007 9:33 pm)
  • kyfdx (Jan 11, 2007 10:12 am)
    • uglybear (Jan 13, 2007 5:53 pm)

Replying to: uglybear (Jan 10, 2007 8:50 pm)

A 6-Speed 535d SP (sans "x") sounds great to me too, especially given that I'm driving nearly 100 miles per day. That said, given the 300 (plus) hp on tap from the twin turbo gasser, oooh, I'd have a difficult time passing that one up.
 
Best Regards,
Shipo

Replies to this message:
• kyfdx (Jan 11, 2007 10:12 am)
  • uglybear (Jan 13, 2007 5:53 pm)

Replying to: shipo (Jan 10, 2007 9:33 pm)

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• uglybear (Jan 13, 2007 5:53 pm)