12k RPM Tuthill 911K - There's a Conversion Kit?

[tdw28210]

Didn't know until yesterday this was something you could separately purchase (at "only" $37k). Has anybody gone down this pricey rabbit hole? Taking a 3.6 motor and and turning it into a 12k rev monster?

https://swindonpowertrain.com/products/24-valve-porsche-911-m64-cylinder-head-kit/

[SBell]

There are much more knowledgeable people than me on this topic but I believe there was mention of a few projects in the works with these heads over in the engine forum. However, I'd consider this more a piece of the puzzle rather than a conversion kit. To spin a 911 motor to 11k require much more than just new heads. I believe the Tuthill motor uses a custom case, crank, rods, and pistons among I'm sure many other parts.

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[shoooo32]

To spin over 11k you'd be replacing the entire drivetrain (basically only keeping the 3.6 case). It only takes one youtube video to sell me on the prospect though

[RSN]

Originally Posted by SBell

There are much more knowledgeable people than me on this topic but I believe there was mention of a few projects in the works with these heads over in the engine forum. However, I'd consider this more a piece of the puzzle rather than a conversion kit. To spin a 911 motor to 11k require much more than just new heads. I believe the Tuthill motor uses a custom case, crank, rods, and pistons among I'm sure many other parts.

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There is really a lot more to it and then there's the total cost of it.

Amazing engineering though.

[Longboarder]

This is my dream. But why does it cost $1.1 million? My completely uneducated answer says to start with a $100k long hood and then add a $1 million drivetrain and then voila, you have the Tuthill 911K.

[stownsen914]

I thought the 3L version spins to 11k and 3.6 was a little lower?

[SBell]

Originally Posted by stownsen914

I thought the 3L version spins to 11k and 3.6 was a little lower?

Yes, the 911K that spins to 11k is a 3.1L I believe.

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[Cloggie]

I am so, so very happy that this kit did not arrive when I was pulling together the parts for my 3.4.

I would have been unable to resist, considering I have already acquired new case, new P/C's, cams, crank, rods, heads, valves etc etc etc.

My budget is undoubtedly healthier, although now I have camshaft envy.

Sigh..

D.