OIL and fluids FOR THE TRACK

Discussion in 'GT350 and S550 Technical Forum' started by flyhalf, Jul 9, 2018.

  1. flyhalf

    flyhalf TMO Intermediate

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    Grazie Steve.
    Alessandro

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  2. steveespo

    steveespo Lord knows I'm a Voodoo Child Moderator

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    Stai tranquillo


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  3. flyhalf

    flyhalf TMO Intermediate

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    Haha LoL

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  4. CompetitionMotorsport

    CompetitionMotorsport What you need, when you need it, no excuses.

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    We use Driven Racing gear oil (75w-85) in both customer race/track cars and our own race cars, with excellent results. Generally, diff temps are a little lower (8-10 deg F) than with an over-the-counter synthetic 75W-90 gear oil. It stands up to extreme heat better than OTC oils, and used-oil analysis has shown wear to generally be lower.
     
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  5. flyhalf

    flyhalf TMO Intermediate

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    Ok.
    Bringing back this post.
    I'm going to change trans fluid.
    Ford asked me to provide them the fluid i want.
    So some says OEM is the best. Some others switch brand.
    What do you suggest?

    Car is 10speed auto.
    And has the stock trans cooler.

    Please advice!

    Alex

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  6. CompetitionMotorsport

    CompetitionMotorsport What you need, when you need it, no excuses.

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    Flyhalf, our experience with automatic transmissions is switching fluid usually does either nothing or is worse. In our race cars with AT, for example, (dirt track cars that use race-prepped auto trans), we use regular off-the-shelf transmission fluid. Factory fluid is what we'd recommend. You're far better off paying to change it more often than trying to put super-special unicorn ATF in.
     
  7. flyhalf

    flyhalf TMO Intermediate

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    Thanks for the info. I might do it too.
    I've just seen high temp on my trans. So i was thinking to protect it a little with better hightemp oil.

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  8. CompetitionMotorsport

    CompetitionMotorsport What you need, when you need it, no excuses.

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    Agree 100%, Motul RBF600 has a dry boiling point similar to Castrol SRF, but a much lower wet boiling point -- the worst of both worlds. There are two good ways to go on racing brake fluid: first is SRF, which has a high wet boiling point but low dry b.p. That means it doesn't resist fade as well fresh out of the bottle, but you can leave it in longer and, as it attracts water, it maintains most of its fade resistance. The second, which we prefer, is to use a very-high dry b.p. fluid like RF1 or RBF660 and flush it more frequently (at most every three months of track use). I've attached a racing brake fluid comparison below that shows dry and wet b.p. of popular fluids, including a few that are "Racing Brake Fluid" in name only and really should be avoided.

    Anecdotal evidence, like engine oil, will be all over the map. But, unlike engine oil, brake fluid is easier to identify better and not better, and it's not worth a few bucks to take risk with brakes. The heavier and more powerful the car, the more we tend toward option two, DOT4 high dry b.p. fluid changed more often. Heavy + fast = kinetic energy, which turns into heat under braking. The high dry b.p. offers a substantial cushion.
     

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  9. CompetitionMotorsport

    CompetitionMotorsport What you need, when you need it, no excuses.

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    You're welcome! Unfortunately, the only good solution for high oil temps is a bigger and/or more efficient cooler.
     

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