|
|
Register To Post |
| sliding | Stock cast crank question | ||
|
Senior Guru
 
|
How are journals on stock vette crank finished?
Is that just raw casting machined to dimensions or are journals hardened in some way? |
||
Posted on: 2009/10/4 13:12
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
 Transfer
|
 
|
||
| dan0617 | Re: Stock cast crank question | ||
|
Senior Guru
 
|
I don't believe they are hardened in any way but I'm not 100% sure. I know when my local machine shop "turns" a crank, they remove a decent amount of material from the journals then use oversize bearings to make up for it, and they do not do anything to the crank other than cut and polish it, no hardening or anything.
|
||
Posted on: 2009/10/4 15:57
|
|||
|
_________________
ยด89 Vert, 383, 230/236 cam, AFR 195's, LT Headers, HSR intake, 2800 stall, Zex 200 shot, ET Street Radials, tune by me. Runs were with D36 3.07's. On spray, 10.55 @ 132.78, 1.55 60 ft. On motor, 12.08 @ 113.15, 1.66 60 ft. |
|||
|
Transfer
|
|
||
| bogus | Re: Stock cast crank question | ||
|
Grand Imperial Pooh-Bah
 
|
I am unaware of any hardening, too.
|
||
Posted on: 2009/10/4 16:08
|
|||
|
_________________
The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
|||
|
Transfer
|
|
||
| sliding | Re: Stock cast crank question | ||
|
Senior Guru
|
OK, thanks! I ask because some european engines have stock cranks that are nitrited and if they are machined they are very soft under that thin coating.
Hopefully I won't need to machine my crank, but I like to be prepared. |
||
Posted on: 2009/10/4 16:38
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| vetteoz | Re: Stock cast crank question | ||
|
Senior Guru
|
Quote:
Some of the factory over the counter performance cranks are nitrited.I don't believe they are any "softer" underneath than a regular crank seeing as they are listed as same 1053 material. The grinding concerns comes from removing the hardened surface which puts you back to a regular crank surface unless you get the journals re-nitried after grinding. |
||
Posted on: 2009/10/5 6:23
|
|||
|
Transfer
|
|
||
| sliding | Re: Stock cast crank question | ||
|
Senior Guru
|
You're probably right. But i know that most of Alfa Romeo engines can't last unles journals are renitrited after machining.
|
||
Posted on: 2009/10/5 12:19
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| BillH | Re: Stock cast crank question | ||
|
The Stig Moderator
 
|
Stock Formula Ford cranks(Cortina/Pinto) are ground ten under with no treatment.
|
||
Posted on: 2009/10/5 12:37
|
|||
|
_________________
Every man dies but not every man lives. |
|||
|
Transfer
|
|
||
You can view topic.
You cannot start a new topic.
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.
|
|