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Richard Oben

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Posts posted by Richard Oben

  1. DonH, Thanks, it was a pain, 3 years or more of fighting this.  Two problems, both on NEW parts, almost burnt it down.  The rubber mount came from searching LS1 tech website and from a local tuner who is big into LS cars. 

     

    On a the plus side, go drive yours, the car will be a blast, just crazy how much fun it is.  Torque on demand, 70 MPH is 2k rpm even with 3.73 gears, AC and tunes.  Not modern comfort but not a bad place to be.  R  

  2. Update again.  Even with Rubber mount, still could hear the shifter rattle at 2000 RPM of engine speed about 1100 drive shaft speed. 

     

    We had the drive shaft re tubed by the group that did the shaft originally.  Better but not right, blurred rear view mirror at 65 mph.  Took CVs off so all we had was shaft trans and differential.  Still vibrated, this is when we did the rubber mount above.  Took shaft out again and had it balanced, better but still not good.  Took trans out and had the rear housing replaced (stripped drain plug) and some other stuff done.  Mainly had the main shaft triple checked.  Back together and still a small but annoying shifter rattle.  

     

    In a last ditch effort before ordering a CV drive shaft we had the shaft remade by another vendor.  Voila, finally can drive the car at any speed with only a minuscule vibration and they just be the LS as I can hear the same harmonic in a lot of You tube videos.  Took multiple attempts but putting the miles on now is much more pleasant.  

     

    Sad this forum isn't busier.  Richard. 

    • Like 1
  3. My other 71 had tank problems only solved by cleaning and sealing.  So the LS car (71 also) got the tank out cleaned and then a Tanks Inc in tank pump set up in it.  Then sealed, pics are in my build thread.  The pump never starves and never have a fuel pressure issue.  It was not cheap to have done as my fab skills are worse than yours.  But worth it in the end.  Not my idea copied it from another guy here on the forum.  3,000 plus miles and no fuel issues.  The rest of the car is chase the tail a bit but that is always the case.  And yes Bone stock LS in a Z is scary fast.  HTH, Richard.   

  4. No updates for a while.  We had a small vibration, not really bad, just annoying, and of course right at 65-70 MPH.   When my wife drove the car we had the 3.07 differential in it, one attempt at finding the vibration.  We put the 3.73 back in (whole chunk, nothing is shared between the two).  And the vibration came back.  Drive shaft out, re balanced, re tubed, trans out, looking for something, anything that may cause vibration.  Half shafts out, again.  Trans UP diff, down to get angles better.  They were not far off before.  All in attempt to cure this vibration.  

     

    Called a local guy I know, who does a lot, I mean a whole lot, of Ls stuff.  He said "poly mount", I said yes.  He said swap it out for a rubber one.  Thought he was CRAZY, we have built a ton of cars with poly mount.  Well, we were dead wrong.  There is a whole thread on LS tech about poly mounts.  Like 5 pages.  Apparently T56 transmissions are very pick about the mount used on them.  I have it on the lift with half shafts out, and the vibration appears to be gone.    

     

    Not complaining about anything just trying to help others that may run into a problem.  3000 miles fighting this vibration, hope it is gone for good.  R 

    • Thanks 1
  5. Just the one.  We ran the Factory Datsun lines from classic tube, who made them bigger for us (3/8 vs 5/16), in all the factory locations.  We modified the tank for in tank pump with sock.  The only filter/regulator is the corvette one mounted at the front of the passenger fender with EFI fuel line going to the engine with the factory connector and an extension from the parts store.  HTH, Richard.  

  6. Called inline tube/classic tube, and they made a set of stainless lines with a 3/8 supply and 5/16 return.  Did brake lines at the same time for the whole car.  They replicate the factory 240Z lines exactly.  Only issue was drilling out all the rubber mounts to 3/8, lol.  Running the same corvette regulator with an in tank pump.  Fully 3/8 from pump to engine using as many factory connectors as possible.  HTH, Richard. 

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