FE Power Forums
FE Power Forums => FE Technical Forum => Topic started by: 482supersnake on October 14, 2021, 03:33:41 PM
-
If a factory steel crank is turned down to BBC rod size would it need to go through a heat treat process?
-
Also, are Molnar rods any good?
-
............would it need to go through a heat treat process?
It would not be considered mandatory, but, back when we used O.E.M. cranks in performance applications we would get them nitrited; this after turning, a ruff polish, heat treated, then straightened, and this would sometimes be concerning as to the sum of re-alignment required, then finish polished. ;)
The heat treatment facility (Sun Coast) was just down the road less than a mile from our shop which was convenient, but every once in while our stuff would come back bright marbled purple in color, I always assumed do to some contamination of the atmosphere in treatment, or it's what happens when late in the day the employee wanting to go home swings the containment door open to soon instead of waiting for the adequate cool down period. We never experienced any issues with this, even though one was still left with the concern for inconsistency in appearance and therefor execution; but with the advent of the 4.6 Modular steel cranks, they most often appear with the same purple coloration, so what the heck! :o
Scott.
-
If you need a factory steel crank turned down to BBC I have one in the classifieds ready to go.
-
I have heard the factory hardening was only something like .020-.030 deep.
-
A caveat---nitriting and nitriding are not at all the same thing, chemically. Please notice the 'd'. The surface treatment for steel has the 'd'. :)
KS
-
Yep, "D". Dog-gone-it! :o Ops, sorry for the typo, my bad! :-[
But at least no one could have physically gone wrong, even if they had attempted to followed my statement to the letter, as the heat treater would have understood one's intention even though you misspelled it. ;)
Could someone please proofread my posts, so at least the spelling is right? ::)
Scott.
-
I can't be the only one that wishes Ken had used the ;) emoji at the end of his post :)
-
;) :o ;)
Used the basic smiley to suggest my comment was not, in any way, intended to be a 'backhand'. My long-ago degree in chemistry and then my work at FoMoCo as a metallurgical process engineer makes me sensitive to something that is not-quite-correct from a chemical viewpoint.
No offense, at all, intended.
KS
-
If you need a factory steel crank turned down to BBC I have one in the classifieds ready to go.
Thanks that's a good deal. I need to see if rods are available that would work with the pistons that I have already.