1500 crankshaft material

[marko]

The guy that does tuftridging asked what the 1500 crankshaft is made of, any ideas apart from solidified toothpaste? Also any suggestions who else to send it to as a personal recommendation is always better. I'm down in South Devon so I know that I will have to post it wherever it goes.
Thanks, Mark.

[tony g]

I'm guessing the real question is ... is the crank forged or cast? Forged will be ok for nitriding and cast may create more issues. Just to add that when cranks are nitrided the heat involved can bend the crank slightly so a regrind on the journals may be needed to correct it ie dont send a +30 crank for nitriding as there may not be enough bearing choices later.

Tony

[Magenta Auto Sprint]

I think he means is the crank made of EN40B steel, all cranks are drop forged steel but it depends on the chemical composition of the steel as to how strong it is,

EN40 B is suitable for nitriding, most other steels are not and I doubt the Dolomite crank is.

malcolm

[marko]

This site suggests EN16T which I understand to mean tempered.
These people have been recommended by my local race engine builder and the chap that I just spoke to suggested tufftride treatment.
http://www.wallworkht.co.uk/content/sal ... tufftride/

Are there any horror stories that are common?

[SprintMWU773V]

There's really no point in Tuftriding the crank for your application. You normally Tuftride a crank to help it be more resilient to power increases. Given that a 1500 engine does not have an abundance of power and you're not going to be doubling the power output there's really not point in Tuftriding it.