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Thread: FWD lifting rear wheel... Bad??

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  1. #1
    Join Date
    Sep 2008
    Location
    FL.
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    1,384

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    FWD needs the rear tire up about 3 in or less. If it is on the ground, that weight(30#+) is not transferred to the inside front tire.
    It is a tick faster. Enouhg so that I have reduced the rear springs and added rear bar.
    Mike Ogren , FWDracingguide.com, 352.4288.983 ,http://www.ogren-engineering.com/

  2. #2
    Join Date
    Jan 2006
    Location
    Rockville, MD
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    274

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    Creating a tricycle.

  3. #3
    Join Date
    Mar 2001
    Location
    Connecticut
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    7,381

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    AKA "going faster in a FWD car."

    Been doing it for three decades, dude. Gotta trust us on this one...Fiestas (and Golfs, and Integras, and Neons) ain't RWD, rear-engined Porsches.

    But I encourage you to investigate, develop, and test the world's best-handling FWD car while working to keep both rear tires on the ground. Make it work and the world will beat a path to your door.

    I wish you the best in your endeavors.

    For the rest of us non-super-humans...lifting the rear tire is perfectly normal.

    GA, who recognizes the rear tires on a FWD car have two basic, primordial purposes: keeping the gas tank from sparking on the ground, and making it look better on the used-car lot. And no, I didn't make that up myself, someone a lot smarter did...

  4. #4
    Join Date
    Nov 2005
    Location
    Jacksonville, FL
    Posts
    734

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    Yep... Well tuned FWD cars will always end up lifting a rear wheel. How much/how far that rear wheels lifts is indicative of total front grip and roll rate. Personally, I've found the fastest setup (and coincidentally easiest to drive also) has limited rear wheel lift. Is it there? Sure. Is it a foot in the air? Nope.
    Christian in FL | Something white with Honda on the valve cover...
    FASTtech Limited- DL1, Schroth, & Recaro Goodness
    LTB Motorsports- The Cheapest Place for Momo
    TrackSpeed Motorsports- OMP, Racetech, & Driver Gear

  5. #5
    Join Date
    Sep 2008
    Location
    FL.
    Posts
    1,384

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    The FWD race car is limited by dynamic loading of the outside front tire. Anything that can reduce this loading will allow higher turn speeds. That is why the inside tire needs to be a little up.
    Controlling the inside rear tire; you can lower the tire with wider track on the rear, wheel spacers as little as 10mm wil have some effect.
    Accounting for the driver! Most LHD race cars will lift the right rear tire more than the left. Toe out the LR tire 3mm or more so that the dynamic weights are closer to even, yes the car dog tracks a little, yes it may go faster.
    Raise spring rate and lower sway bar rate.

    The farther outside the rear tire tracks than the front tire , the more weight is balanced front to rear and thus has a higher overall all speed potential, more equal tire loadings etc.
    This is one reason why ¨dynamic rear steer¨ goes faster, less front tire load/more rear tire load.
    Mike Ogren , FWDracingguide.com, 352.4288.983 ,http://www.ogren-engineering.com/

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