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Thread: Advice on Spring rates for 1UZ AE70 Corolla

  1. #1
    Senior Member qagzie's Avatar
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    Default Advice on Spring rates for 1UZ AE70 Corolla


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    Hello Friends!

    i just completed my 1uz ae70 swap (after 3 years)...heheh... Car is insane!!

    i would like some advice on what spring rates are appropriate for my setup. engine is a stock 1996 1UZFE with a W57 and a hilux diff and 195/50 r15s. I intend to use the car mainly for street (racing)/ weekend driver.

    Thanks

    Max.

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    Veteran Konakid's Avatar
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    I would start with something around the 5kg Fr and 3.5Kg rear and get a feel for it from there. 7 and 5 is normally good for drifting so the softer rates will be good for the street with bumps and also some squat for extra grip with the power level you now have.
    RT142 Estate.

    AJPS.

  • #3
    Senior Member qagzie's Avatar
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    Quote Originally Posted by Konakid View Post
    I would start with something around the 5kg Fr and 3.5Kg rear and get a feel for it from there. 7 and 5 is normally good for drifting so the softer rates will be good for the street with bumps and also some squat for extra grip with the power level you now have.

    Thanks for your reply!

    Considering the added weight of the 1uz, i was of the view
    (guesswork) that perhaps i needed a slightly higher rate in the front...so i was leaning towards 7/5.... turns out it's more of a drift setup than street. Unfortunately, i had already acquired 5kg eibach springs for the rear.... was still saving up for the fronts...

    So now I'll put them back in the box and try your recommended setup for starters..

    How does a 6/4 setup compare?

    Cheers.

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    Veteran Konakid's Avatar
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    Dont overthink it. Run the 5kgs in the rear and see what you think. Get some 7kg for the front. with the heavier diff, gearbox and motor they will probably be ok, similar to a 6 and 4 setup. Will probably still be on the stiffer side for the street though. The 1uz is all alloy block too so it isnt as heavy as you would think. I had 6 and 4.5 in my corolla years ago and this was a good street setup, not too stiff but definitely on the limit for the street.. i then went to 8 and 6 and it was very stiff mainly good for drifting. it didnt like the bumps in the hills roads too much.

    Make sure you get some good hocks to dampn the springs too
    RT142 Estate.

    AJPS.

  • #5
    Senior Member qagzie's Avatar
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    Turns out that 5kg in the rear is waaay too stiff for any reasonable/enjoyable driving on street roads. Car is bouncy allover the place and has limited grip.

    I'm thinking 3kg springs would calm things down pretty well.

    Max.

  • #6
    Senior Member qagzie's Avatar
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    Quote Originally Posted by qagzie View Post
    Turns out that 5kg in the rear is waaay too stiff for any reasonable/enjoyable driving on street roads. Car is bouncy allover the place and has limited grip.

    I'm thinking 3kg springs would calm things down pretty well.

    Max.
    UPDATE

    So, yesterday I installed a pair of 175lb hypercoils in the rear, (~ 3.1kg/mm) and instantly the car felt more balanced and also had better grip after taking it for a drive. What's left is just fine tuning the rebound on the coilover adjuster.

    Cheers

    Max.

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    Veteran Konakid's Avatar
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    Nice! good to trial and error sometimes, even though it costs more at least you know now.
    RT142 Estate.

    AJPS.

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