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sts9292
Samba Member
Joined: March 15, 2004
Posts: 218
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 Posted: Sat Jan 14, 2012 11:38 am Post subject: What is this - buchered rods ? |
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My mechanic opened the case of the engine to find the reason for the excesive crank play .... full story here in case you are bored .. http://www.thesamba.com/vw/forum/viewtopic.php?t=489822&highlight=
but I was surprised to see the piston rods. The engine is a stroker 2276cc and the case clearanced, but I have never seen rods like this. It appears to me that these are standard rods filed to fit the case. According to the PO who sold me this POC engine the rods are "clearanced, dynamically balanced and weight matched to 0.5g" ... Is this the normal way to clear the rods to fit the case for a stroker engine? Someone please comment ....
Case:
Case:
Rods:
[/img] |
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earthquake
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Joined: January 10, 2008
Posts: 3984
Location: SANDY VALLEY, NEVADA
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| Posted: Sat Jan 14, 2012 11:54 am Post subject: |
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The only tools the guy must own are a bench grinder, right angle grinder and a chain saw, I would take it back and throw it through his biggest window. 
Casey
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DarthWeber
Samba Member
Joined: November 24, 2007
Posts: 7543
Location: Whittier,CA
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| Posted: Sat Jan 14, 2012 12:26 pm Post subject: |
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Wow! Those rods are junk now. I wouldn't use them in a stock 1600 rebuild. What a hack job....on the case too!
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| 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.  |
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kielbasa
Samba Member
Joined: November 28, 2007
Posts: 1443
Location: Garbage Grove, CA
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| Posted: Sat Jan 14, 2012 12:55 pm Post subject: |
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Your pictures look funny, distorted, squished and stretched. I think the pics are making it look worse then they are. Looks like they did a fairly rough job on the rods, but if they took their time making sure they didn't heat the rods too much while grinding, you should be okay, they look really thin, but that could be the funky picture.
For the case, if everything clears, and nothing went through or super thin. You are fine. Go inthere with a air grinder, even a dremel and take off all the rough and Sharp corners. Relieves windage and thus more HP! While your at it, open the small Windows between each cylinder hole to allow 3 fingers to fit. That will help a lot.
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modok
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Joined: October 30, 2009
Posts: 26781
Location: Colorado Springs
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| Posted: Sat Jan 14, 2012 2:27 pm Post subject: |
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| Rods are junk, bolt heads and caps too thin |
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sts9292
Samba Member
Joined: March 15, 2004
Posts: 218
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| Posted: Sat Jan 14, 2012 2:38 pm Post subject: |
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Pictures are fine. They are close-up/macro lens from my camera and I had to make them smaller to upload. I have the originals posted on the link below.
http://www.flickr.com/photos/sts9292/sets/72157628870034225/show/
But the questions has not been answered ... Is this the normal way to clear the rods to fit the case for a stroker engine? and a new question: should I just trash them and what should I get then?
Can someone post pictures of a good stroker crank / rod combo so I have a way to compare? |
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Koyote
Samba Member
Joined: March 31, 2008
Posts: 193
Location: Dijon, home of the mustard.France
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| Posted: Sat Jan 14, 2012 2:49 pm Post subject: |
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| sts9292 wrote: |
| Pictures are fine. |
No. They are obviously not fine.
But it's enough to say about your rods, that the best place to store them is in the trash.
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jbbugs
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Joined: September 16, 2002
Posts: 2152
Location: Behind the wheel
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| Posted: Sat Jan 14, 2012 2:51 pm Post subject: |
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Looks like a motor from West Woast Core.
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speedyshift74
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Joined: January 12, 2005
Posts: 449
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| Posted: Sat Jan 14, 2012 3:01 pm Post subject: |
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| Not everyone out there that builds these engines has a Machine shop with CNC equiptment to Stroker Clearence the inside of a case. The method above looks like it was done with a milling machine and a few air files . So what!! I have witnessed people sit and clearence with a Dremal tool. If a pretty looking inside of the case is what you are looking for, then send it to a big name shop like CB or JayCee. If things clear when the crank and rods are dropped in, then things will be fine. As for the rods???? They need to be replaced. They were not clearenced with a very good technique. |
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mark tucker
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Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Sat Jan 14, 2012 3:09 pm Post subject: |
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| kinda looks like some berger man rods I saw, but worse,a lot worse.trash them and get a new set of stroker rods.I do like the pics thou.kinda looks like an old tractor motor. |
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t0ne321
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Joined: February 06, 2006
Posts: 119
Location: San Diego, Ca.
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| Posted: Sat Jan 14, 2012 3:10 pm Post subject: |
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Seeing as the bolts are grinded through, it looks like he installed the rods on the crank THEN grinded away with an angry beaver. This also probably means he didn't balance the assembly. If all he has to work with is an angle grinder, i doubt he had access to a dynamic balancer.
Sorry for your bad luck, I'm not surprised this engine didn't make it more than a mile.
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slalombuggy
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Joined: July 17, 2010
Posts: 9145
Location: Canada
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| Posted: Sat Jan 14, 2012 4:05 pm Post subject: |
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No this is not the way to clearance for a stroker crank. Yes, you can shave the rod caps and bolts down a bit, but not near this much. The rods are now junk. The case on the other hand looks to be done not too badly. Grab a die grinder and a flapper wheel and get rid of all the sharp edges and ridges.
brad |
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Glenn 
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Joined: December 25, 2001
Posts: 76902
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| Posted: Sat Jan 14, 2012 4:09 pm Post subject: |
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Sure looks like Bernie Bergmann to me.
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DarthWeber
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Joined: November 24, 2007
Posts: 7543
Location: Whittier,CA
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| Posted: Sat Jan 14, 2012 4:12 pm Post subject: |
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| sts9292 wrote: |
But the questions has not been answered ... Is this the normal way to clear the rods to fit the case for a stroker engine? and a new question: should I just trash them and what should I get then?
Can someone post pictures of a good stroker crank / rod combo so I have a way to compare? |
No, that is not the normal way to clearance stock rods. This isn't the greatest picture but this IS the proper way VW rods should be clearanced. These are rods done by Jose at DPR:
The two ridges on the bottom of the cap are not completely ground away nor is the head of the bolt butchered. Compare.
Personally, I would trash the rods you have and buy a set from DPR or a set of Rimco Super Rods. 5.4" Chinese CroMo rods are also a choice for you.
This is a good stroker crank, again DPR:
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| 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. |
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tstevenson
Samba Member
Joined: December 07, 2011
Posts: 14
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| Posted: Sat Jan 14, 2012 4:17 pm Post subject: |
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| Case and crank look fine. Rods do look very clearanced. Did you weigh them? Can you check if they are balanced? |
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Jake Raby
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Joined: August 23, 2003
Posts: 7433
Location: Aircooled Heaven USA
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| Posted: Sat Jan 14, 2012 4:20 pm Post subject: |
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I just threw up in my mouth.
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sts9292
Samba Member
Joined: March 15, 2004
Posts: 218
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| Posted: Sat Jan 14, 2012 4:23 pm Post subject: |
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Ah !!! Making sense now. I do know much about this kind of suff but ... things like this raise my eyebrows ... specially when you suspect that the whole build is compromised based on my previous posts.
I just wish that the PO steps up to the plate and admits the fault and agrees refund my $$$$. .. \\ |
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sts9292
Samba Member
Joined: March 15, 2004
Posts: 218
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| Posted: Sat Jan 14, 2012 4:27 pm Post subject: |
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| Hey Jake ... BTW I used one of your DTM (263) on this POC !! .. but anyway I still planning to put it to work. Great product ! |
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Jake Raby
Samba Member
Joined: August 23, 2003
Posts: 7433
Location: Aircooled Heaven USA
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| Posted: Sat Jan 14, 2012 4:33 pm Post subject: |
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Sad but typical.
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Jake Raby
Raby Engine Development
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Sat Jan 14, 2012 5:04 pm Post subject: |
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| Jake Raby wrote: |
| Sad but typical. |
yup.all too comon.talked to a guy today ,he is on his 4th motor in 4 years,and it is mostly junk,1 big valve head,1 head hemi cut,leeks like the horizion drill rig.he says thats all you can get in new mexico, the same guy builds these killer motors for everybody out there..gladd Im in fl & do my own shit.. |
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