Tag Archives: suspension

2JZGarage – Supra 2JZGTE VVTi Project Update

Well it’s been a while since I’ve posted up any info on my own supra. Unfortunately the supra and this website sometimes become lowest on the list of life’s priorities, but that doesn’t mean I’m still working on the supra – A man must have his hobbies!

Current power;

  • Tuned on pump 98 fuel with a result of 445rwkw (597rwhp) @ 23.5 psi
  • Tuned on pump e85 with a result of 482rwkw (646rwhp) @ 23.5 psi

Since the last update these are the major changes;

  • Titan 272 VVTi Camshafts, GSC Valve stems, GSC beehive springs and titanium retainers – hopefully a write up coming soon on installing these
  • New LS2 LQ9 coil setup, which you can see HERE
  • Swapped out the old Garrett T51R SPL BB with a new Garrett GTX 4088R turbo with 1.06 rear. This was primarily to make it more streetable with the current engine setup staying stock for a while
  • Exhaust camshaft timing adjustments and slight vvti intake cam adjustment made by my tuner – this dramatically improved mid-range with the turbo by around 40hp – Exhaust cam tuning was 2 degrees of retard from memory
  • TRD Seibon hood removed and stock hood put back on to try and improve bonnet lift while racing at high speeds – although I still managed to brake another shroud at around 270kph (167mph)
  • Flex fuel sensor installed, although wiring yet to be setup and tuning to be complete
  • Tial BOV and other exhaust fabrication work for new turbo
  • Driveshaft shop single piece drive shaft, B series diff, Solid diff bushings to reduce axle tramp
  • Powersteering cooler setup in RHD duct
  • TRD sway bars and new links
  • New clamps for FMIC, fittings and ducting
  • Probably a few other things here and there that I’ve forgot about

Next in line will be cleaning up a few things I’m not 100% happy with at the moment such as improving intake temps. I will be installing twin thermo fans due to radiator setup and high speed racing causing shrouds to break – this will require some further intake fabrication work. Would like to create a custom airbox, install a fabricated oil catch can, changing to a new boost solenoid to allow for launch control/boost by gear and fix up some wiring.

New GTX4088R turbo got installed, managed to tap out a boost fitting and have a local shop do some fabrication work

The Titan 272 VVTi Camshafts, GSC Valve stems, GSC beehive springs and titanium retainers getting installed, I will be putting lots more pictures up and explaining this process in the near future

IMG_3780

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REAS Suspension Diagram, Pictures and Information

Found in the 97.9-02 JDM Toyota Supra (RZ and SZ-R only) was the REAS suspension system – REAS (Relative Absorber System) shock absorber system.

I was lucky enough to have this suspension in my supra before I swapped it out a few years ago for some HKS hypermax coilovers.

I’ve posted a link below with some information on the system and also one of my favourite pictures of the supra, a chassis picture without the shell showing the REAS suspension.

Basically it was to improve ride comfort while still having good flat cornering ability. I’ve also put some pictures of mine when I pulled it out, I still have this available although I’m not sure if they can be re-filled or re-used.

(Translation from Toyota Japan – hence the japanese-english translation wording!)

REAS (Relative Absorber System) for comfortable ride and high handlings stability.
The REAS features an entirely new mechanism that functions not only to achieve a comfortable ride with a relatively small amount of damping force in cases like when both tires hit a gap in the road, but also functions to stabilize the body of the automobile against lateral “rolling” motion by adding a suitable amount of extra damping force and absorb the force acting in the lateral roll direction, as when cornering, when the pattern of depressions and protrusions in the road surface are different on the left and right wheel sides or when subjected to cross winds. Three main points of the REAS structure are as follows

1. The left and right shock absorbers have separate oil chambers with a REAS valve positioned on the connection flow passage.

2A single gas chamber is shared by the left and right.

3. Using the separate actions of hydraulic fluid and gas, a separating piston is activated by the coupled movements from the right and left.

REAS suspension information

REAS

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