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yhzman

Crank bearing clearances for N9TE

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Hi,

I am looking to build up an N9TE engine that previously had a cracked head.  We had the crank measured and these are the readings that were taken (inches):

2.2347 (56.7614 mm)

2.2348 (56.7639 mm)

2.2348 (56.7639 mm)

2.2346 (56.7588 mm)

2.2348 (56.7639 mm)

 

Here are the main bearing tolerances from the N9TE engine manual:

image.png.7f0eeb4e2713a05ce9dacdebc91ed43f.png

 

If I am planning to build an engine with custom turbo, injectors, intercooler, ECU, etc. and could make upwards of 250 hp or more, what would be the recommendation with regard to the clearances for the main bearings?  Do I need bearings that bring it back to stock clearances, or what is the best approach here?

 

Thanks for any and all help!

 

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0,2 over size is ok, no need to grind if surface is okay (note at also cleaning purpose grind take it close to up limit of tolerance). To be safe surely good to use over size, but if I have same situation I would use that 0,2 size.

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