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20" F-Body Movement

This is a discussion on 20" F-Body Movement within the Wheels and Tires forums, part of the General Help category; Originally Posted by RJWZ28 The gearing is what matters for acceleration, not the strength. I don't know what transmission you ...

  1. #61
    Senior Member Too Fast's Avatar
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    2000 WS6 6spd Hooker LT

    Quote Originally Posted by RJWZ28 View Post
    The gearing is what matters for acceleration, not the strength. I don't know what transmission you have, but a lot of auto f-bodies have a 3.23 rear gear ratio and manuals commonly have a 3.42. If you don't have either of those two gears out back, then you are likely running a highway gear, probably a 2.73, which is in no way good for acceration. I have only run into one or two 4th-gen cars with that rear gear. Anyway, when you put on a tire with an overall height that is greater than stock, you effectively reduce your gearing. This is what took the edge off of your acceleration. The tires you put on are just over 4% taller than factory. If you were to replace them with 275 or 285/25R20 tires out back and 245/30R20 tires up front, you would get your gearing almost exactly where it was when stock, with a difference in diameter of only .5% or less. Or you could replace your rear gear with a 3.73 gear or 4.10 gear, which should make up for the tire height difference and give you quicker acceleration. I don't know what your rear gear is in your Moser, but any increase in gear should reverse a lot, if not all, of the negative impact on your acceration. Please keep in mind that larger diameter tires are also harder on your factory brakes, not only because they weigh more but also because the taller diameter provides the tire with added leverage against the power of the brakes.
    And with a sidewall like that, you better not ever hit any sort or pothole or bye-bye rim. Not to mention they are a realy PIA to mount/dismount the tire on/off the wheel.

    I wonder how much more these 20s weigh than stock 17s. Anything that adds to unsprung weight slows acceleration, usually handles worse, makes braking poorer, and reduces gas MPG. But, these wheels look great.

  2. #62
    Member Speed_kills_WS6's Avatar
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    I think the 20's look super. I busted 3 wheels hitting a curb in my 18's. I just ordered new rims, but sticking with 18's. I was torn between those and the 19's. If I was only looking for looks, I'd do the big wheels. However, I wouldn't want to be caught trying to race with all the unsprung weight of 20's. But your car looks damn good.

  3. #63
    Member 99'CajunFirehawk157's Avatar
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    Bright Red
    99 Firehawk #157 Roadster

    Exclamation

    Quote Originally Posted by BrianH.WS6 View Post
    If you don't mind me asking... how much did getting your fenders rolled cost you and who did it?
    I think I may need to do the same to avoid a rub with my 17x11's.
    NOPE not if you get the correct off set, are you lowered? Mine never rub.

  4. #64
    Junior Member JLRZ28's Avatar
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    Huffy Bike

    Looks sweet! never seen one with 20's that I have been impressed with but yours has proven me wrong.

  5. #65
    Steph my1stss's Avatar
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    Nice choice, they look awesome. I have 20's also and they just look so bad ass.

  6. #66
    Member 20ws6speed01's Avatar
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    not bad at all....black on black saves it...just think if it was all chrome

  7. #67
    Senior Member Too Fast's Avatar
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    ^^^Agreed. If it was all chrome, that'd be way too much bling. Works for this car tho!

  8. #68
    Junior Member k dog 33's Avatar
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    Navy Blue Metallic
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    one word...SMOKIN!!!!!!!!!!!!

  9. #69
    Senior Member JoshuaGrooms83's Avatar
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    Looks good! Ive been on the boat that 20s are too big but those look HOT!!! IM gonna stick to 18"s though for racing reasons. Thats alot of metal to be turning. Great looking car though!

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