Jump to content


Photo
- - - - -

Power drain from Timing Chain / Valuable Build Tips herein...


  • Please log in to reply
49 replies to this topic

#41 galderdi

galderdi

    Junior Member

  • Members
  • PipPipPipPip
  • 133 posts
  • LocationBrisbane Australia

Posted 10 April 2012 - 03:33 PM

Thanks again for the guidance. I had another look and even had a retired mechanic friend take a look. The rod itself is most definatly on the correct way as all six have the divot in the side of the rod pointing the same way. The pistons are also all consistant.

All the caps still have the "shaddow" from the corresponding bearing notch from the rod. So from this I can see I am putting them back the same way they were fitted last time.

It is quite possible it was the result of someone resizing this one but it must have been a previous owner.

By the way this is a spare engine which I have never had running.

I will indeed take a couple of photos. I am also tempted to remove all the pistons and start from scratch to make sure there are no anomolies. I guess it is vaguely possible a rod and or cap could have been mixed up with another set or maybe the machine shop lost the cap and replaced it without telling me. There are all sorts of posibilities.

#42 Tony D

Tony D

    Wiki D

  • Donating Members
  • PipPipPipPipPipPipPipPipPip
  • 9979 posts
  • LocationReno NV & Lucena Quezon, Philippines

Posted 10 April 2012 - 09:00 PM

"Bits n Bobs a Fine Engine Make!"

LOL
Misanthropic Anthroparion Class 5 Hoarder, aspiring to posthumous fame as my containers are cut open and the market floods with crap I've squirrelled away over the years! I endeavour to persevere...

#43 PMC raceengines

PMC raceengines

    Always Here

  • Members
  • PipPipPipPip
  • 306 posts
  • Locationmorwell vic austraila

Posted 25 April 2012 - 12:09 AM

I did some tests thru the week on some of the engines at work , A L28 race motor with out plugs takes 20 ftlb to turn, with race springs ,120 on the seat , 14ftlb for the bottom with rear seal and all pistons new rings fitted ..
BTW after running on the dyno for 1 hour i tested it again without plugs it now turns free with 16 ftlb :D .

#44 steve260z

steve260z

    Junior Member

  • Members
  • PipPipPipPip
  • 349 posts
  • LocationSan Antonio, TX

Posted 29 April 2014 - 06:01 PM

Thanks PMC, this is all "straight from the book", the Datsun bearing shells were available in various backshell thicknesses of EXACTLY the reasons mentioned.

It's good to see some others interested in the "art" of engine building, rather than mere "assembly"! Many pooh poohed the "Industrial Arts" wing of high school thinking it was for the losers who couldn't hack it in the AP Classes and "needed" to work with their hands. Lots of disrespect for the ART that is endemic to mechanical work.

FAR too many people see it simply as something that can be codified, annotated, abbreviated, and replicated "by any trained monkey"--these are the same ones who don't like long answers because they are "un-necessary and overly complex, this is a simple procedure!"

There is Art in all aspects of life. If you cultivate the art, indeed it's simple to get good results. If you view it as mere assembly work, you will remain amazed when you see it done properly.

 

Stumbled across the this gem....Sorry to bump an old thread.. Everybody go back to what you were doing...


3.1L Stroker, F54, P90, 9.9CR, .8mm Metal Head Gasket, Schneider Stage 2 Cam,Header, Exhaust, Weber DCOE 40s

Build:  http://forums.hybrid...-antonio-31l-z/

& E92 335i 6 Speed manual, Cobb flash tune: 400hp


#45 TimZ

TimZ

    OG Member

  • Members
  • PipPipPipPipPipPipPip
  • 2390 posts
  • LocationDearborn, MI

Posted 29 April 2014 - 07:24 PM

Stumbled across the this gem....Sorry to bump an old thread.. Everybody go back to what you were doing...

 

I just linked to it a couple of days ago - took me a while to find it again!  Now that it's been bumped, could we make this a sticky?  Some really valuable build advice in this thread, and it's really hard to find with search terms, even if you know the thread exists and are just trying to find it again.


Posted Image

Information is not knowledge
Knowledge is not wisdom
Wisdom is not truth
-FZ, Joe's Garage

#46 Tony D

Tony D

    Wiki D

  • Donating Members
  • PipPipPipPipPipPipPipPipPip
  • 9979 posts
  • LocationReno NV & Lucena Quezon, Philippines

Posted 27 December 2014 - 05:27 AM

You just linked it again TimZ, which refreshed my annoyance at basic assembly discipline...that's all pretty much written down.

When you pour Babbitt, and scrape bearings for an engine you realize a lot of stuff people take for granted today aren't always the way it was done.

Three years ago, I exited our China operations because my management team claimed I had an issue with our operations there...that I was "needlessly bashing them without all the evidence being in."

This year, I was asked to go back... "To audit installation and service practices"... and I asked if this was a validation of my claims three years ago and reminded them of my statement when I withdrew: "When we make this connection interface bulletproof, and these guys STILL WRECK THE MACHINES, what will our excuse be THEN? Will we THEN look at the decision to employ engineers for field support, rather than hands-on technicians who take pride in their work and aren't looking for a mandarin fingernail and the coveted office job? Will you THEN listen to me that these guys are killing our machines? It's not an ENGINEERING problem, it's an installation and service personnel problem!"

We had a crew of guys slapping stuff together, in horrendous industrial arts fashion. There is an art or craft to putting just about anything together. You can control that process in a factory, but in the field the ONLY hope is your assemblers/field techs being competent at their craft and knowing how to assemble these things correctly.

My managers reply "uh, yeah...it took us a while to catch on with what was really going on there!"

Yeah, two week blow-through junkets and living halfway around the world -- it's easy to pull the wool over your eyes. Spend four months a year there and you see stuff....horrible stuff... Stuff you tell your isolated, disbelieving management and they say "I can't believe so-and-so would do that!" Nice to be called a liar...why would I lie? I thought you wanted me to audit work practices?

I digress... I blame this on you Tim Z! You linked this thread again and dredged it all up!

Edited by Tony D, 27 December 2014 - 05:31 AM.

Misanthropic Anthroparion Class 5 Hoarder, aspiring to posthumous fame as my containers are cut open and the market floods with crap I've squirrelled away over the years! I endeavour to persevere...

#47 TimZ

TimZ

    OG Member

  • Members
  • PipPipPipPipPipPipPip
  • 2390 posts
  • LocationDearborn, MI

Posted 28 December 2014 - 08:02 AM

Glad I could Help! :P

 

Ah the wonders of the "Global Team"  :mrgreen:


Posted Image

Information is not knowledge
Knowledge is not wisdom
Wisdom is not truth
-FZ, Joe's Garage

#48 TimO

TimO

    TimO ~ orig. owner 72z

  • Members
  • PipPipPip
  • 90 posts
  • LocationNevada City

Posted 28 December 2014 - 08:36 AM

Ahh the TimZ and TonyD team causing trouble again.... :D


 

 

 

 


#49 HowlerMonkey

HowlerMonkey

    Member

  • Members
  • PipPipPipPipPipPip
  • 1403 posts
  • LocationWest Palm Beach

Posted 06 March 2015 - 07:26 PM

I picked up a complete l28e from the junkyard after turning it using the fingers of my right hand on the alternator and then the balancer using both hands.

 

It's been in service ever since.



#50 1vicissitude

1vicissitude

    Always Here

  • Members
  • PipPipPipPip
  • 133 posts
  • LocationAnaheim Hills, CA

Posted 24 April 2015 - 05:29 PM

Interesting. These guys made a roller rocker setup for the BMW m20.

http://racehead.com....conversion-kit/




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users