Toyota GT86 race car suspension question

Discussion in 'Tuning General' started by Outlier73, Dec 16, 2013.

  1. Outlier73

    Outlier73 Licensed Racer

    So I had a question for some of the more experienced racers/tuners after Friday's on make race.

    In my practice /tuning session on Thrusday I was struggling with understeer a bit so was hoping to reduce the rear toe and adding some toe in to the front but found this setting as well as camber greyed out.

    There didn't seem to be an upgraded suspension option so I dropped the front ARB to 2 and raised the rear to 4 to reduce understeer mid corner and then lowered the front break slightly to move the brake bias back. (believe it or not I left the ride hieght all the way up becuase when I tried to lower it the car just wound not grip as well)

    I didn't do too much on the differential becuase I simply ran out of time. (also didn't test downforce at all so left default setting) During the race when I was struggling to hold on to Mopar and Satrek I was heating up those front tires really good and it became obvious my set up was far from ideal.

    so my question to the more experienced GT tuners is - how do you generally tune out understeer on these GT86 cars?

    I was going to adjust diff settings getting prepped for Bathurst but unfortunatly I'm going to be out of town on Friday so I won't be able to race anyway. So I'm more asking for future reference.

    Thanks in advance for any help!
     
  2. MiamiPhill

    MiamiPhill TPRA Staff

    I'm not a tuner by any stretch but here goes;
    1) For some reason the camber & toe settings are non adjustable on this particular car even though it's a racing suspension, and the toe is fixed at 0.20 which contributes to understeer. Normally you would get rid of that right away.
    2) The thing to do to get cars to turn in GT5 was to lower the back of the car, raise the front or sometimes both.! I don't know if that effect carries over to GT6.
    3) I was having the same issue and fixed it by lowering the rear downforce, shifting the brake bias to the rear and playing with the spring rate.
     
  3. Outlier73

    Outlier73 Licensed Racer

    Thanks MiamiPhill!

    I'll try lowering the rear a bit and dropping the rear df more. I do believe I either decreased rear DF slightly or raised front but I don't recall now. It certainly was not a lot and I didn't test DF changes. I also slightly lower the front spring rate but not by much and again didn't have time to test the results either. I'm guessing I could probably go with more on both counts.

    thanks again - I'll try those setting and see how it drives on Apricot.
     

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