Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

Light Weight Connecting Rods

 
Post new topic   Reply to topic    924Board.org Forum Index -> Performance Upgrades
View previous topic :: View next topic  
Author Message
MikeJinCO  



Joined: 08 Jun 2010
Posts: 733
Location: Maysville, Colorado

PostPosted: Tue Jan 05, 2016 12:40 am    Post subject: Light Weight Connecting Rods Reply with quote

Last spring after trying to lighten a couple of old connecting rods by grinding the counter balance off and spending quite a bit of time and not getting much accomplished, I found some videos of them being machined and thought I'll take a flyer on that. I sent a set out to John Edwards at Costa Mesa R&D in California to see what would happen. When talked to him( he is a bit old school and email seems to be a lost cause) he said they work well as they are from "a little truck motor".

When I got them back with my ARP rod bolts install they were reduced from a starting point of 887 gm to 754 and all within a gram. They tapered top end looked weird to me, but the local machinist said that is getting pretty common these days and fitting new bushings is not a problem. The cost was quite reasonable and with the rod bolts was less than half of getting Crowers.

One caution, don't expect a rapid turn around.


As
_________________
Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
Back to top
View user's profile Send private message Visit poster's website
MikeJinCO  



Joined: 08 Jun 2010
Posts: 733
Location: Maysville, Colorado

PostPosted: Tue Jan 05, 2016 12:44 am    Post subject: Reply with quote

That didn't come out quite like I expected.

One more Pic.


_________________
Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
Back to top
View user's profile Send private message Visit poster's website
ideola  



Joined: 01 Oct 2004
Posts: 15509
Location: Woodstock IL

PostPosted: Tue Jan 05, 2016 3:37 am    Post subject: Reply with quote

Do your rods not have squirters??? It may be that you just happened to photograph them squirter-side down, but I have seen some 924 rods without them. I would not want to run non-squirter rods in a turbocharged application.

Interesting results, thanks for the details!
_________________
15 981 GTS | 88 924S SE | 82 931 Holbert | 82 931 Rallye | 81 937 | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 80 US 931 | 80 931 GTR | 79 Sebring | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition | 77 Martini
Back to top
View user's profile Send private message
MikeJinCO  



Joined: 08 Jun 2010
Posts: 733
Location: Maysville, Colorado

PostPosted: Tue Jan 05, 2016 4:25 am    Post subject: Reply with quote

The rods came out of my 931 motor. I have no plans to use these in a turbo application, I did tell John what my application was beforehand. When I get home(March) I will check to see if he cut thru the squirter hole although I don't recall seeing it in the machining.
_________________
Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
Back to top
View user's profile Send private message Visit poster's website
Noahs944  



Joined: 08 Dec 2015
Posts: 726
Location: Calgary, Alberta, Canada

PostPosted: Tue Jun 07, 2016 5:45 am    Post subject: Reply with quote

Just saw this. Pretty awesome share mate.
Back to top
View user's profile Send private message
MikeJinCO  



Joined: 08 Jun 2010
Posts: 733
Location: Maysville, Colorado

PostPosted: Thu Jun 16, 2016 6:33 am    Post subject: Reply with quote

The squirters were not affected at all. When I took the pics I didn't turn one rod over to show the squiter.
_________________
Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> Performance Upgrades All times are GMT + 11 Hours
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


Powered by phpBB © 2001, 2005 phpBB Group