Madd Motorsports 1975 S30 Datsun 280z. Infusion Build

Discussion in 'Build Ups & Projects' started by B.mad, Jun 15, 2016.

  1. mcglsr2

    mcglsr2 Well-Known Member SN95 Supporter

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    Good times ;) And if you can spare the coin, maybe a Rocket Bunny kit ;)
     
  2. Lanter

    Lanter Active Member

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    I'd keep that wheel honestly. Looks sick and the bigger diameter will be a huge plus in the car, especially if you keep the l28 in it. I put a smaller wheel in my 280z and low speed maneuvers became annoying with the amount of effort it takes to turn the tires with that heavy straight six sitting right over the rack.
     
  3. B.mad

    B.mad Well-Known Member Preferred Vendor

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    I have some stock headers and plates laying around. If needed i'll go to patsons (?) and get more. Cant wait to get better.
     
  4. B.mad

    B.mad Well-Known Member Preferred Vendor

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    haha i like the kit, she doesnt. She doesnt like fender flares :p
     
  5. B.mad

    B.mad Well-Known Member Preferred Vendor

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    Interesting, i would think it was the opposite? I think she is looking to properly refurbish the wheel with a mahogany-like finish and keep it for shows.
     
  6. Lanter

    Lanter Active Member

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    Think of the mechanism to turn a non power steering car as the torque applied to the steering wheel. Where torque depends on the magnitude of force and the length or the lever arm. The lever arm in this case is the wheel and since the force is applied 90 degrees to the center of the wheel you can ignore the angular term. So to get more torque to turn the wheel you either have to increase the force or make the wheel diameter larger so if you put a small wheel on it will take more force to apply the same torque to turn the front wheels.


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  7. lutter94

    lutter94 Well-Known Member

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    In layman's terms (or a test engnineer's terms for that matter), you have more leverage with a bigger steering wheel. Heavier engine = more pressure on the tire = more friction when steering = need for bigger steering wheel. :)
     
  8. mcglsr2

    mcglsr2 Well-Known Member SN95 Supporter

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    What you said is all true. And really, it all depends on the application. For racing, typically, driving with a larger diameter wheel can be uncomfortable, and you end up with the issue of having to move the wheel too much to initiate turn-in, etc. Another way to approach this is with the steering rack: if the current steering rack proves too difficult and requires a larger diameter wheel, then swap out the rack for one with a more favorable ratio. Make the rack do the work, not your hands. Granted, with a smaller wheel, it will still be somewhat harder to turn the wheel, sure, but you can get more wheel movement for the smaller turn, thus ending up with a smaller wheel *and* good turn-in.

    Of course, if the car isn't going to be tracked, then rock whatever steering wheel floats your boat. Diameter doesn't really matter so much.

    And, as a for-reference, my parent's 69 Dodge Dart GTS has manual steering, and a 383 sitting over the rack.....and my mom used to drive it. She may have b1tched about it (I honestly don't know) - but she drove it. Food for thought. It has a smaller diameter Grant wheel on it, not the stock (she drove it with both wheels).
     
  9. Lanter

    Lanter Active Member

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    Non-mustang Build alert! 280z.

    You're 100% right that the application is everything when picking the wheel. I should have mentioned that the reference to torque needed to rotate the wheel is for a static car. Once it's moving even at relatively slow speed the steering wheel will be pretty easy to turn. So if you're wanting to race a bit and are willing to give up a little parking lot maneuver convenience then smaller steering wheel may be the ticket.

    A 383 dart would be sick. Do your folks still have it?
     
  10. mcglsr2

    mcglsr2 Well-Known Member SN95 Supporter

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    Yes they do, looking forward to when I can get my hands on it. They are the original owners.
     
  11. neverenuff

    neverenuff Active Member

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    2JZ?.........

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  12. B.mad

    B.mad Well-Known Member Preferred Vendor

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    [MENTION=15705]mcglsr2[/MENTION] [MENTION=20552]Lanter[/MENTION] [MENTION=10528]lutter94[/MENTION]

    Interesting read, i had no idea and never thought about the torque needed to turn the wheel. Makes sense why pirate ships have such large wheels, and valves that are under large pressures. We are going to have to retrofit some power steering for her :D
     
  13. B.mad

    B.mad Well-Known Member Preferred Vendor

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    Another choice on the list. Honestly, it is going to be a mixture of cost, availability, power, and sound.
     
  14. neverenuff

    neverenuff Active Member

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    Well it isn't going to sound like a pushrod 5.0.....but it can sound like 1000+hp[​IMG]
    But even the factory one can be built to handle a good amount of power.
    Sent from my SM-N900V using Tapatalk
     
  15. B.mad

    B.mad Well-Known Member Preferred Vendor

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    Lol too much power. We are thinking about 400rwhp with a redline of 8000.

    sent from the toilet or from my cubicle
     
  16. DKblue98GT

    DKblue98GT Well-Known Member

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    A 2JZ would be pretty sweet. 400 hp in that car would be a lot of fun.
     
  17. B.mad

    B.mad Well-Known Member Preferred Vendor

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    hell. 300 will be fun haha. These cars are like 2600lbs. Get some weight reduction going on and easily get into the 2300 range.
     
  18. Frank.JD.Perez

    Frank.JD.Perez Legend

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    where the updates at brandon?
     
  19. MustangChris

    MustangChris Post Whore Retired Staff SN95 Supporter

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    I love it when non-mustangs sneak into the build section.

    Keep on keepin' on!
     
  20. B.mad

    B.mad Well-Known Member Preferred Vendor

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    Im in St. Louis on vacation drinking waay to much. Theres your update lol