[Supras] Need CT-26 core and modifier recommendation

Sat Feb 3 19:15:51 CST 2007

Rocky, Nick, and group:

    Thanks for the good information.  I'm wondering why the California rebuilder I spoke with recommended only 50 trim.  It could have been because at least for the moment, I'm remaining with two cats.  He also cautioned against exhaust wheel trimming.  But, each rebuilder has his own opinion.  

    Any leads on a rebuildable core would be appreciated.  Thanks again.

        Bernie
  ----- Original Message ----- 
  From: Rockey Fox 
  To: berniek at technicaldevelop.com ; t72pwrd ; Supras at supras.com 
  Sent: Saturday, February 03, 2007 5:41 PM
  Subject: Re: [Supras] Need CT-26 core and modifier recommendation

  Bernie, FWIW I am pleased with my new 57 trim compressor upgrade. The exhaust was trimmed a bit as well. It pulls much harder all the way up to redline and seems to really coming on strong around 3000 rpm. I haven't really missed the lower rpm spin up of the stock trim due to my driving style as I pretty much am up in rpm to achieve desired speed then hit cruise control.
  Currently I'm running stock AFM with FIPK, stock 440 injectors and 3" defcon downpipe, test pipe and 3" crinkly bend exhaust (previous owner). I'll probably put the random technologies 3" cat back in line next time I have the exhaust apart. I really didn't notice any difference between the test pipe and the 3" RT cat, I just removed the cat before the rebuild of the turbo due to the excessive oil leaking into the intake.
  hth,
  Rockey 91T

  ----- Original Message ----
  From: "berniek at technicaldevelop.com" <berniek at technicaldevelop.com>
  To: t72pwrd <nholden1 at woh.rr.com>; Supras at supras.com
  Sent: Saturday, February 3, 2007 1:02:04 AM
  Subject: Re: [Supras] Need CT-26 core and modifier recommendation

  Nick:

      Thanks for the info.  In  some manner we have discussed the NJ
  inspection system before.  At some point the dynamometers will be removed
  from the stations since the vast majority of cars are now OBDII equipped,
  and the dyno test takes time and money.  So for now I'm going to remain with
  both cats which means use of a 2.5" elbow.  I did polish the inside of one,
  for all that it might matter.  Later, if I still have the Supra, I may
  upgrade to a single 3" cat, elbow and downpipe.  Already have an HKS 80
  (85?) mm exhaust installed.

      There was one rebuilder in California I spoke with about a month ago who
  did recommend only 50 trim for street use.  According to his experience,
  boost will start at around 3000 RPM.  So at least there will be some
  reduction of waste gating to gain some power.  I'm curious what your
  experience has been with bigger compressor trim.

      The rest of the mods will be a Lexus AFM, 550 RC injectors, Walbro pump,
  EGT thermocouple and gauge.  This may sound nutzoid, but I have an exhaust
  gas analyzer with a long hose which I can put on the driver's seat during
  initial operation to insure sufficient richness at WOT (also bought a camper
  domestic water pump to use with McMaster-Carr nozzles for water injection,
  maybe to come much later).  The analyzer option for tuning does not seem
  that crazy, considering that a wideband O2 sensor cannot be left in place.
  Those items will go in after the engine is in the car and inspected the
  first time (its a year overdue since its been down for 14 months).  I do
  have a mule car to drive for work, in addition to an old van for backup, so
  the Supra can be down again for the mods.  After the bugs are ironed out, I
  intend on making up a 2.5" piping system for the intercooler from exhaust
  tubing, since I have gas and stick welding equipment.  What makes me scratch
  my head a bit is a way of doing a gradual transition from the stock 2" size
  to 2.5".   When I moved the wastgate actuator diaphragm connection to the
  3000 pipe, the factory boost gauge (and thus boost) read only 2 PSI higher,
  maybe 2.5 PSI on a hot day at most.  From what I've read for daily driver
  use, the stock intercooler is not that bad, but the piping is.  Most of the
  piping will be rigid, since I'm also using late MkIV engine mounts which are
  very stiff.

  The the air filter box will go when I have more time (very precious and hard
  to come by).  But I start to get discouraged when thinking about other
  things like beginnings of rust bubbling, worn driver's seat, 156K miles on
  the chassis, and a myriad of other little things to be done.  I almost
  jumped ship and was about to get a leftover GTO, but I know I'd miss the
  Supra (the back of the GTO is sickening, courtesty of your namesake down
  under, nothing personal of course), not withstanding the $$$ already spent
  on Supra parts and time spent.

  Enough blabbing for now.  Gotta get power supply design done for a client
  who can become irate at any moment.  Please let me know what your larger
  trim expernences are.  Thanks.

            Bernie

  ----- Original Message ----- 
  From: "t72pwrd" <nholden1 at woh.rr.com>
  To: <berniek at technicaldevelop.com>; <Supras at supras.com>
  Sent: Friday, February 02, 2007 8:25 PM
  Subject: Re: [Supras] Need CT-26 core and modifier recommendation

  > I used Turbonetics many years back:  http://64.225.76.178/main.htm (note
  > they're Performance Techniques not the realTurbonetics).  I was as pleased
  > as possible with their service, product and delivery.  Turbo did NOT crap
  > out or burn oil while I used it.  The other option, IMHO is Jon ar MDC:
  > http://www.mdcmotorsports.com/mdc%20front%20page.htm  No personal
  > experience, but the guy seems to do what he says and stand by his work.
  >
  >
  > I'd go bigger Bernie;-)
  >
  > Use the dark side!
  >
  >
  > ----- Original Message ----- 
  > From: <berniek at technicaldevelop.com>
  > To: <Supras at supras.com>
  > Sent: Friday, February 02, 2007 7:31 PM
  > Subject: [Supras] Need CT-26 core and modifier recommendation
  >
  >
  > > In the JDM rebuild I'm doing, I've decided on a mild 50 trim compressor
  > > upgrade.  I'll be running 15-16 PSI maximum for a daily driver.  If
  anyone
  > > has a rebuildable CT-26 core, please let me know.  As long as the shaft
  is
  > > straight and there are no cracks or turbine wheel damage it should be
  OK.
  > > Loose bearings or worn seals are not a problem according to most
  > > upgraders/rebuilders I've spoken with.
  > >
  > > There were quite a few posts several weeks ago about failure of rebuilt
  > > turbos.  Anyone have any idea of good rebuilder?
  > >
  > > Thanks.
  > >
  > >        BernieK
  > > _______________________________________________
  > > Supras mailing list
  > > Supras at supras.com
  > > http://supras.com/mailman/listinfo/supras_supras.com
  >
  >
  >

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