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Heavyweight challenge - supra time attack?

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    Heavyweight challenge - supra time attack?

    Hi all,

    My plan is for a time attack poopra with street rego to get there and back.

    Original platform
    Mark2 supra manual with cheap carrett single conversion, microtech and front mount, alloy radiator, qsc shocks, front and rear cusco strut braces, 044 pump, external swirl pot, hks fuel rail, 850cc injectors, 3.5inch dump, chinese wastegate

    Over the last 12 mths I've already done:
    4/2 trd brakes, dba slotted rotors
    A048 semi slicks
    Precision 6765 - 0.96rear
    Apexi avc-r - 1 bar boost
    100k service
    50mm tial wastegate with screamer
    Sparco race seats
    Quick spool valve
    TE37s

    Results so far
    312kw at 17psi - mixture check
    1.02.44 sprint circuit queenslad raceway (bit useless after reading rz's thread but meh)

    Next

    Full race spec bond weld in rollcage
    Oil cooler
    Undertray w front splitter (RZ - you there?)
    Heat shield for clutch / brake booster
    Clutch (os giken disappears after a few laps)
    Harnesses

    Future mods

    Driver training!
    Weight loss after cage added 100kg+
    Ikeya lower and upper control arms
    More boost
    More rubber then when I run out of with on semis - full slicks
    E85
    New ecu
    new dash with data logger of some kind
    Diet (lose my gut)
    Rebuild - can anyone here help with ideas? Yanks seem to go 3.4 stroker but I'm new to all this.

    All suggestions and help encouraged!
    Attached Files
    Originally posted by thebluerx7
    The fact they want to ban cash makes me want to go out and use it full time again now .


    #2
    My advice if you want to go fast is to spend less time on the power and more on getting it to stop and turn corners better. 3.4L stroker seems like massive overkill. An E85 tune with a good fuel system should get you close to 400rwkw with a 35r or similar sized turbo. Fix the floating style rear subframe and get a good wheel alignment then go from there.

    Good stuff though, your car looks just like my old RZ, same colour and front lip and similar wheels. I'm in the process of building a jza70 for time attack, not an easy task with a GT car like the supra but all the more fun. With the splitter, ring some plastic shops and get hold of aluminum composite panel. It's light, easy to use and cheap. I got a 2450x1450mmx3mm sheet for $107 bucks.

    Comment


      #3
      Paging Mr Punanni and RZ.
      Originally posted by brasher
      TJ is 99% African American.

      Comment


        #4
        Certainly does not need to have the heavyweight tag, although much of that depends on how streetable you want to keep it - the scope is there to lose a lot more than 100kg even after a cage

        I hope you're saving the coin for that Ikeya front end!

        Originally posted by Jim
        I feel that rules are important as without rules there is no cheating and cheating is a vital part of drag racing.
        Originally posted by elfturbomax
        What has happened to PF? It seems to be diesel love now days. Maybe the name should be changed to Particulate Forums.
        1UZ+1NZ...

        Comment


          #5
          I never could understand why people called Supras heavyweights. They'd be under 1500kg with a single, and well under with some basic race prep, which is similar to a 32 GTR. Comparing to a silvia maybe, but then nobody seems to criticize GTS-Ts even though they are fairly similar in weight.

          Comment


            #6
            agree with spiller , too much boost sucks arse especially if you have a largish single turbo... they get all swap-endy and horrible, so unless your pretty good at car control, you will just end up eating dirt and gravel, been there.
            as for suspension i have NFI. i just have cheap coilovers in mine and mounted the subframe like spiller suggested. but it would probably lap the same without either.
            wrong person to ask about a serious car, apart from taking out weight mine is pretty devoid of development.
            https://www.facebook.com/Petes-Weldi...7343264035404/

            Comment


              #7
              Cheers guys. Re: the stroker and power etc, I should have noted this is a long termer too and that is bottom of the list under driver training, weight loss etc.

              It's stiff as hell as I got it, tyre temps are very even across the tyres at QR though but it is 'swappy' now rz, more power without more talent won't help me yet and I don't need more heat, and e85 means a new ecu as no-one up here wants to touch it with the microtech on it.

              On the rear sub-frame - do you mean solid mounting it?

              I went 6765 and quickspool rather than 35r, haven't finished playing with the qsv and it is on boost really early compared to the 35r I have on my merc (2j).

              For now the cage and suspension plus clutch and cooling / weightloss is the next 12 months. Rebuild only if something breaks. So you guys wouldn't go 3.4 in the long run though? I was after the torque, the other option I guess is playing with diff ratios once I get serious but don't know what options are floating around. It has the ao3b now.

              Pennys are saved too. This was a challenge sneaking past no pics at the start but it's been 12 months to this stage so I should be right over the long term :).
              Originally posted by thebluerx7
              The fact they want to ban cash makes me want to go out and use it full time again now .

              Comment


                #8
                Yeh, get the braking and handling right first, once you find that lack of power is a significant handicap then look at having more. And don't spend money twice. Which means get what is necessary the first time even if the price hurts. Harry (hrd) has punted a Supra around Lakeside, he would have useful advice. Speaking of Lakeside, get out there asap because it is way more challenging than QR and requires good handling and driver input above all else.
                Richard's DatsunZ lappin LakesidZ http://www.youtube.com/watch?v=47OSh...&feature=g-upl

                “Freedom of speech does not protect you from the consequences of saying stupid shit.”
                ― Jim C. Hines

                “Everyone is entitled to his own opinion, but not to his own facts.”
                ― Daniel Patrick Moynihan

                “Four hostile newspapers are more to be feared than a thousand bayonets..”
                ― Napoleon Bonaparte

                Comment


                  #9
                  Yes, solid mount the subframe. I would do suspension mods in this order...

                  Coilovers
                  Solid rear subframe (not sure if the 80 subframes crack like 70 so you may have to reinforce!)
                  Front and rear sway bars with adjustable end links
                  Adjustable camber arms, toe, traction etc

                  Spring rates are also something to look into but it depends on whether this is street as well or just track.

                  What have you done for weight saving? You can ditch the a/c and rip out all of the sound deadening, stereo equipment and all of that stuff behind the dash that isn't necessary (heater core, fan box, condenser etc). All of that should save you at least another 75kg. Then you'd have to look at lighter panels if you wanted to go further.

                  Comment


                    #10
                    Originally posted by 260DET View Post
                    Harry (hrd) has punted a Supra around Lakeside, he would have useful advice. Speaking of Lakeside, get out there asap because it is way more challenging than QR and requires good handling and driver input above all else.
                    I haven't had the supra out there but am a member of hrcc and gear days and have had the old mans etype racer round there a few times. I reckon it will need big balls in the supra, the e hits 200kmh by the kink.
                    Originally posted by thebluerx7
                    The fact they want to ban cash makes me want to go out and use it full time again now .

                    Comment


                      #11
                      Lakeside is a blast in a powerful car, it requires so much finesse to go fast, too much power can make it difficult until you get a handle on what is required to do good times there.

                      I may know of your Dad, has he got a brother who has built a stretched Gemini hybrid?
                      Richard's DatsunZ lappin LakesidZ http://www.youtube.com/watch?v=47OSh...&feature=g-upl

                      “Freedom of speech does not protect you from the consequences of saying stupid shit.”
                      ― Jim C. Hines

                      “Everyone is entitled to his own opinion, but not to his own facts.”
                      ― Daniel Patrick Moynihan

                      “Four hostile newspapers are more to be feared than a thousand bayonets..”
                      ― Napoleon Bonaparte

                      Comment


                        #12
                        Most of the Alloy subframe and diff mounts and adjustable arms can be bought at good prices from www.driftmotion.com
                        He gets them from www.battleversion.com, it's decent stuff (see my build thread)

                        If there's any parts you don't see on the website just email him and he will add them

                        You would need to source the rear subframe mount from Titan though

                        Originally posted by Jim
                        I feel that rules are important as without rules there is no cheating and cheating is a vital part of drag racing.
                        Originally posted by elfturbomax
                        What has happened to PF? It seems to be diesel love now days. Maybe the name should be changed to Particulate Forums.
                        1UZ+1NZ...

                        Comment


                          #13
                          And the 48s will be hurting you bad. Worst semi on the market.
                          Rust is lighter than carbon fibre.

                          My Italian 510

                          Comment


                            #14
                            Originally posted by oliveoyl View Post
                            Mark2
                            If you want to use the stupid yankee terms, thats actually a "mark 4" or MKIV, but its a series 2. ;)
                            #WHOTW award winner #blessed #susanalbumparty

                            Comment


                              #15
                              Originally posted by Guido View Post
                              And the 48s will be hurting you bad. Worst semi on the market.
                              I second that. I used some secondhand Advan A048's (Medium/hard compound) for 3 rounds of lasts years SA Time Attack. I swapped over to a new set of Hankook Z221's and I shaved 1.5 seconds from my time around Mallala with nothing else changed to the car.

                              It would be a pleasant change for someone to find the right recipe by making a Supra competitive around a circuit because it appears to be a rare occurrence. The RZ Supra at last years SA Time Attack as well as the Supra that competed last year at WTAC didn't exactly set the world alight on the Timing Boards.
                              Mallala Motorsport Park - 1:11.71 - https://www.youtube.com/watch?v=tY85CK31if8
                              Wakefield Park Raceway - 1:05.31 - http://www.youtube.com/watch?v=PREI-jK4L98
                              Mt. Alma Mile Hill Climb - 41.67 - https://www.youtube.com/watch?v=kTmaG8jn3Tw

                              Comment

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