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Thread: Questions about Roll Center Adjusters

  1. #1
    Junior Member Grease Monkey
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    Default Questions about Roll Center Adjusters

    Hi,

    I've been reading about suspension geometry and roll center etc. with regard to Roll Center Adjusters. Is it correct to say that the general rule for calculating the size of RCA require is whatever mm you lowered you car = size of RCA??

    What would happen if you fit RCA that is slightly bigger? ie if you lowered your car 30mm but you put a 40mm RCA? would it have negative impact on the car handling or would the different be too small to make much different?

    Thanks

  2. #2
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: Questions about Roll Center Adjusters

    that all depends where the roll centre was originally, and where is the ideal position.
    for 30mm lowering, maybe the roll centre ends up in a better place than before?
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  3. #3
    Junior Member 1st year Apprentice
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    Default Re: Questions about Roll Center Adjusters

    The effect would depend on the suspension geometry. If you lowered 30mm and got a 40mm RCA. But..

    More than likely the lower control arm has some sort of downward angle to it, or if not then very close to level. Larger RCA than required will reduce your camber, but increase camber gain. It will also raise the roll center of the vehicle, which is usually not desirable. You noticing it or not is really a matter of how sensitive you are, and how hard you are pushing your car. I'm sure an experienced driver could tell if it was changed even the slightest.
    73 Celica (New track car) - 20/22R Hybrid, caged, built suspension, AE86 brakes, 5 speed, 155 rwhp, 165 rwtq all motor!
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  4. #4
    i wrote the Automotive Encyclopaedia roadsailing's Avatar
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    Default Re: Questions about Roll Center Adjusters

    i wouldnt bother with RCAs for dropping a car 30mm, i lowered the front of mine about 2.5 inches and i think i liked it more before i put RCAs in! this is probably more due to the alignment before and after i put them in, might have fluked it then buggered it after i put in the adjusters.
    like to drift? live in victoria?
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    formerly shinybluesteel

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