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Crankshaft grind down .010?
Do I have to get the crankshaft Nitride coating after the machine shop grind down .010? My plan is to boost the motor.
https://cimg0.ibsrv.net/gimg/www.mia...20762dd9f.jpeg https://cimg1.ibsrv.net/gimg/www.mia...f1e7ad992.jpeg https://cimg4.ibsrv.net/gimg/www.mia...b55249347.jpeg |
No, I never have.
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Originally Posted by curly
(Post 1594658)
No, I never have.
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Only cranks that are commonly "re-heat treated" after work are aircraft which have to be by law.
Car stuff is commonly heat treated at the factory (Japanese/German stuff ) but it's THIN and not done to the same level as aircraft stuff is. Having a crank re-treated is EXPENSIVE as most of the shops that do this are doing aircraft of industrial stuff. I prefer to use factory cranks that have not been ground for my go fast builds but... I've never seen a recut crank fail because the metal was too soft. Lots of folks use ground cranks on big HP builds on all brands of manufacture. More important on a regrind is a gentler (larger) radius on all of the "edges/corners" and high quality work. On a REALLY serious build this radius can be so large that bearings with a 45 degree clearance cut on the outside edges is some times a requirement. I haven't seen this on a BP build yet. In my book having the crankshaft re-balanced is more important than having it re-heat treated. |
Originally Posted by technicalninja
(Post 1594677)
Only cranks that are commonly "re-heat treated" after work are aircraft which have to be by law.
Car stuff is commonly heat treated at the factory (Japanese/German stuff ) but it's THIN and not done to the same level as aircraft stuff is. Having a crank re-treated is EXPENSIVE as most of the shops that do this are doing aircraft of industrial stuff. I prefer to use factory cranks that have not been ground for my go fast builds but... I've never seen a recut crank fail because the metal was too soft. Lots of folks use ground cranks on big HP builds on all brands of manufacture. More important on a regrind is a gentler (larger) radius on all of the "edges/corners" and high quality work. On a REALLY serious build this radius can be so large that bearings with a 45 degree clearance cut on the outside edges is some times a requirement. I haven't seen this on a BP build yet. In my book having the crankshaft re-balanced is more important than having it re-heat treated. |
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