Author |
Message |
Chuck67 Samba Member
Joined: February 13, 2006 Posts: 101 Location: SoCal
|
Posted: Sun Sep 25, 2022 9:37 pm Post subject: Crank Grinds Before Crank Is Trash? |
|
|
How many grinds on a counter weighted crank (mains and rods) before it is considered trash?
Thanks |
|
Back to top |
|
|
modok Samba Member
Joined: October 30, 2009 Posts: 26743 Location: Colorado Springs
|
Posted: Sun Sep 25, 2022 10:34 pm Post subject: Re: Crank Grinds Before Crank Is Trash? |
|
|
Three,
.040 under bearings are no worth stocking IMO.
If you screwed it up the third time give it to somebody else, that's why
but.... A crank isn't trash until it's cracked, or, at least cracked in a way that matters. |
|
Back to top |
|
|
67rustavenger Samba Member
Joined: February 24, 2015 Posts: 9665 Location: Oregon
|
Posted: Sun Sep 25, 2022 10:55 pm Post subject: Re: Crank Grinds Before Crank Is Trash? |
|
|
modok wrote: |
Three,
.040 under bearings are no worth stocking IMO.
If you screwed it up the third time give it to somebody else, that's why
but.... A crank isn't trash until it's cracked, or, at least cracked in a way that matters. |
DPR repairs crankshafts.
If the crank is beyond what you feel is serviceable. Send it to them and they can make it whole again!
It'll just take some time to make it through their shop. _________________ I have learned over the years.
Cheap parts are gonna disappoint you.
Buy Once, Cry Once!
There's never enough time to do it right the first time. But there's always enough time to do it thrice.
GFY's Xevin and VW_Jimbo! |
|
Back to top |
|
|
vwracerdave Samba Member
Joined: November 11, 2004 Posts: 15280 Location: Deep in the 405
|
Posted: Mon Sep 26, 2022 7:22 am Post subject: Re: Crank Grinds Before Crank Is Trash? |
|
|
Depends on how big & powerful of an engine your building. On a mild 1776 I'd go .040" on a 200 HP stroker I'd wouldn't go past .020"
I won't build a stroker engine on a case that has had the thrust cut. _________________ 2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK
Featured in Dec. 2001 HOT VW's Magazine page 63
Watch my racing video's http://www.youtube.com/user/okvwracer/videos |
|
Back to top |
|
|
jeffrey8164 Samba Member
Joined: January 06, 2018 Posts: 3804 Location: Georgia
|
Posted: Tue Sep 27, 2022 2:34 pm Post subject: Re: Crank Grinds Before Crank Is Trash? |
|
|
Even though while working at a VW shop, I built many engines with .040 cranks and align bored, thrust cut cases, they were priced and sold and stamped as such. Pretty much the last hoorah.
They were all stockers as well. _________________ Volkswagen!
Turning owners into mechanics since 1938.
“Let he that is without oil throw the first rod”
(Compression 8.7:1) |
|
Back to top |
|
|
Clatter Samba Member
Joined: September 24, 2003 Posts: 7527 Location: Santa Cruz
|
Posted: Tue Sep 27, 2022 2:49 pm Post subject: Re: Crank Grinds Before Crank Is Trash? |
|
|
I'd heard that the heat treat on the journals can start wearing thin after a couple of turnings.
Plus the journals being a bit thinner/weaker, and a good radius on a turned crank being less likely as well.
Guess it all depends... _________________ Bus Motor Build
What’s That Noise?!? |
|
Back to top |
|
|
|