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To Tub or Not to Tub

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  • To Tub or Not to Tub

    Is putting in front tubs really worth the effort on a s13 track car? The only rust I have to deal with is under the battery tray so I am already cutting in that area. I just want to weigh the benefits.

    I will be cutting the fenders for over fenders as well down the road.
    94 Vert on long road to RR recovery
    89 Hatch DD(died in crash)
    96 S14 stock KA/MT DD (replaced 89)

  • #2
    I don't see the need. You can't get any benefit from anything remotely resembling stock geometry.
    '18 Chevrolet Volt - Electric fun hatch for DD duty!


    DefSport Koni Sleeve and Spring Perch Buy!!!
    http://www.nissanroadracing.com/showthread.php?t=5902

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    • #3
      I regret it every time I open my hood. It started a snow ball of custom stuff to go around the tubs.

      Related question: does nasa consider these inner wheel well modifications under the time trial rules?

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      • #4
        Originally posted by Jorge1190 View Post
        I regret it every time I open my hood. It started a snow ball of custom stuff to go around the tubs.

        Related question: does nasa consider these inner wheel well modifications under the time trial rules?
        I would think so.
        '18 Chevrolet Volt - Electric fun hatch for DD duty!


        DefSport Koni Sleeve and Spring Perch Buy!!!
        http://www.nissanroadracing.com/showthread.php?t=5902

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        • #5
          This is why I ask. I know the drifters do it for the Extreme steering angles but I haven't found a posted "need to have" benefits on any track forums when I search.
          Thanks
          94 Vert on long road to RR recovery
          89 Hatch DD(died in crash)
          96 S14 stock KA/MT DD (replaced 89)

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          • #6
            I discussed tubbed inner fenders with the NASA TT director and it's illegal in TTF-B. You'd have to run in the unlimited class and take an adjustment factor.
            NASA Time Trials TT3


            BTW I work for Garrett

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            • #7
              That is one thing I need to really look at is classification.
              94 Vert on long road to RR recovery
              89 Hatch DD(died in crash)
              96 S14 stock KA/MT DD (replaced 89)

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              • #8
                As soon as you cut the strut towers and add tubs, you have to take the "Non-Production Vehicle Type" mod, which is -0.7. It's not worth such a huge penalty for just tubs. May be worth it if you were going to redo front as tube-frame car, which would increase stiffness and possible reduce weight.
                NASA Time Trials TT3


                BTW I work for Garrett

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                • #9
                  Thanks. Right now I have to decide how far I am willing to go with this car. Being it originally started out as just making a really nice, clean, fast, Vert that is street able and good for weekend fun.
                  94 Vert on long road to RR recovery
                  89 Hatch DD(died in crash)
                  96 S14 stock KA/MT DD (replaced 89)

                  Comment


                  • #10
                    Canning the Tubs idea
                    94 Vert on long road to RR recovery
                    89 Hatch DD(died in crash)
                    96 S14 stock KA/MT DD (replaced 89)

                    Comment

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