Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts  See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Cast 82mm Crank
Forum Index -> Performance - Engines/Transmissions Share: Facebook Twitter
Reply to topic
Print View
View previous topic :: View next topic  
Author Message
bugguy1967
Samba Member


Joined: January 16, 2008
Posts: 1572
Location: Los Angeles, CA 90016
bugguy1967 is offline 

PostPosted: Sun Jun 10, 2012 10:50 am    Post subject: Cast 82mm Crank Reply with quote

I've owned an 82mm Cast Porsche journal crank that I've been planning to use for a 2110. It was turned to .020 and wrapped up a few years ago. I located a set of Porsche rods and had them rebuilt so the set is ready to go.

I chose an Engle 120 because its' powerband peak is the same or close to the max rpm limits of the crank. I also am using a Bosch SVDA with a 5400 RPM rotor so over-revving will not be an issue.

Question is has anyone ever heard of or had a cast crank problem before?
_________________
I won't be complaining anymore about the aftermarket and how parts fit these days. It's made me a much better builder than I ever thought I'd be.
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
DarthWeber
Samba Member


Joined: November 24, 2007
Posts: 7557
Location: Whittier,CA
DarthWeber is offline 

PostPosted: Sun Jun 10, 2012 11:33 am    Post subject: Reply with quote

My opinion......... Take your 82 cast crank, sell it, get what you can for it and buy a quality DPR crank. But don't mind my opinion (I'm a cast crank Haterrrr Evil or Very Mad ) you'll get plenty of guys here to tell you cast cranks are great, go right ahead and use it. Rolling Eyes
_________________
Mitey62 wrote:
Swapped the Compufire for a Bosch blue and some points I had sitting around, started 1st crank. Took her out for a drive, pulls harder, more RPM, and runs smoother. I think I'll be sticking with points from now on.

RockCrusher wrote:
JB weld the case halves....that'll keep the fretting to a minimum. Laughing
Back to top
View user's profile Send private message Gallery Classifieds Feedback
ALB
Samba Member


Joined: August 05, 2008
Posts: 2897
Location: beautiful suburban .....
ALB is offline 

PostPosted: Sun Jun 10, 2012 11:41 am    Post subject: Reply with quote

If you're going to put a 5400 rpm rotor in it, why not use a W110 to more closely match that rpm ceiling? Why have something that will rev to 6000 rpm if you're not going to use it?
_________________
On a lifelong mission to prove (much to my wife's dismay) that Immaturity is Forever!!

Slalombuggy- Now I understand my trust issues...
Back to top
View user's profile Send private message Classifieds Feedback
vwracerdave
Samba Member


Joined: November 11, 2004
Posts: 9598
Location: OKLAHOMA
vwracerdave is offline 

PostPosted: Sun Jun 10, 2012 2:28 pm    Post subject: Reply with quote

I've had a 78 cast crank engine and broke it at the drags. I've had two 69 cast crank engines both with less then 100 HP and neither have had any problems after hundreds of drag strip passes. RPM is not what is going to kill your cast crank. HP and torque will. You can turn it to 8000 RPM, you just can't use in an an engine that makes over 100 HP. I totally agree with darth, sell the cast crank and rods and get a new forged crank and H beam rods. The China junk today is still good to 200 HP without any problems.

Have you see the price of Porsche rod bearings? There is a reason nobody uses them any more.
_________________
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
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Performance - Engines/Transmissions All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2014, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB