Greetings from Sweden, long time reader first time writer to this excellent forum.

I am currently sourcing parts to a full engine build for my 997.1T during winter 21/22
At the same time I´ll do a full overhaul on all wear parts and what strikes me is how absurdly expensive crankshaft bearings seem to be.
The kit 997.101.901.00 including I - VIII bearings sell for around 1250 Euro
Include
Snout: 964.101.138.01
Thrust: 996.101.231.92
Main: 996.101.232.95 (superseed .92)

Local source say I might be able to use the kit 964.101.901.00 Include I - VIII bearings, sell for around 450Euro
Snout bearing are litterarely the same, but my questions is if there are any material change on the thrust and main bearings which will not make them suitable for M97.70 engine.

I do not intend to cut corners on a +30k engine build, but no point paying double if not needed

 

You might want to get in touch with these guys:

https://performancedevelopments.com/...-rod-bearings/

Or these guys:

https://www.design911.com/Porsche/99...-cma81-cmo117/

There might be others out there, but they may give you some alternatives. One thing I saw mentioned was whether or not you were getting the crank reworked which could have an impact on what you do with bearings. But in any case they might have some useful information for you.

Ed

 

Thank you for feedback.
I plan to leave the crank untouched, except for balancing and potential polish dependent of wear.
I have checked with a few well known component sales places who hold both alternatives, and to my limited surprise I am always told "the 997.101... kit is the right one for you" without any technical reason why. I was hoping some enthusiast / engine builder measured and checked materials to confirm / abandon this idea. Also I am curious to find out what grade of cryptonite might been used in 997.101... for some simple bearing shells, which actually might justify the price
Edit: I found this, seem like they sell Glyco, and apparently suggested to fit 997 Turbo as well the older versions.
https://porshop.co.uk/porsche-mechanical-parts/porsche-997-gen-1-mechanical-parts-2004-to-2009/porsche-997-gen-1-engine-components-2004-to-2009/main-bearing-set-911-84.html