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The mkiv Supra Owners Club

Drag Supras rear suspension setup ? ?


Joe.

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What are ye all using for max rear grip ?

 

What rear shocks and spring rates are being used ? I Have Ohlins with Swift springs but don't know the spring rates yet. Was looking to use 7/8kg rears

 

What setting are being used for camber/toe/castor ?

 

car will weigh in below 1200kg

 

 

Want to set the car up for max grip on the rear and front ,

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What are ye all using for max rear grip ?

 

What rear shocks and spring rates are being used ? I Have Ohlins with Swift springs but don't know the spring rates yet. Was looking to use 7/8kg rears

 

What setting are being used for camber/toe/castor ?

 

car will weigh in below 1200kg

 

 

Want to set the car up for max grip on the rear and front ,

 

 

I am not a drag race expert but understand the dynamics needed from the suspension. Run the rear with soft progressive rear springs, dampers with hardly any bump settin in them, positive camber and modify the subframe mounts to give anti squat. Run the front with hardly any rebound, long, multi coill springs, camber zero, no toe, castor doesn't really matter, just try to stop as much front tyre drag as possible, ideally by getting them off the ground! Run lots of tyre pressure on a narrov rim and tyre set up. Youi need rear weight transfer that is applied fast. It won't go round corners though. get inertia out of the drive train. Run tall rear tyres. Tear the guts out of it, get bored and go circuit racing :)

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Chris I have HKS Hyper Drag Suspension, apparently recommended by titanmotorsport as a good street/drag setup,

 

I have 19" wheels on at the moment but I'm going down to 18" hopefully soon

 

But my question is can I change my setup to yours as described without buying anymore parts?

 

What do you mean by progressive springs?

My suspension seems pretty solid just now and I'm gonna get a set of camber adjustable arms, maybe the PHR ones, but i would like to be able to change from Drag to a circuit racing setup with a few adjustments...can this be done?

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Thot that:innocent:

 

I have bad inside wear on my 19"...best get the camber adjusted when I get the 18"s?

 

I want a street/circuit setup then, can I bring it down to you to tweak!;)

 

Bearing in mind it wont be back on the road for another 2-3months!

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I am not a drag race expert but understand the dynamics needed from the suspension. Run the rear with soft progressive rear springs, dampers with hardly any bump settin in them, positive camber and modify the subframe mounts to give anti squat. Run the front with hardly any rebound, long, multi coill springs, camber zero, no toe, castor doesn't really matter, just try to stop as much front tyre drag as possible, ideally by getting them off the ground! Run lots of tyre pressure on a narrov rim and tyre set up. Youi need rear weight transfer that is applied fast. It won't go round corners though. get inertia out of the drive train. Run tall rear tyres. Tear the guts out of it, get bored and go circuit racing :)

 

the car is not for drag Chris , its for drift . what way would you modify the subframe for anti squat, angle the pinion hight of diff to point towards the ground ?

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Why would you want max rear grip for drift? I dont understand the logic?

 

more grip = more forward speed

 

its not all about spinning wheels , grip gives you more controll over the car in a drift but requires more speed ,

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Sorry I though you guys were just trying to spend the most time sideways, I must admit i like the forward traction too, keeps down the chance of spinning.

I found the V groove tyres were hopeless at forward traction, not using assymetrical patterns anymore.

If you can figure out the amount of camber gain vs suspension drop when power is applied you may be able to set the car to postitive camber static and reach "0" when you need it most, which can only be good for traction.

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Sorry I though you guys were just trying to spend the most time sideways, I must admit i like the forward traction too, keeps down the chance of spinning.

I found the V groove tyres were hopeless at forward traction, not using assymetrical patterns anymore.

If you can figure out the amount of camber gain vs suspension drop when power is applied you may be able to set the car to postitive camber static and reach "0" when you need it most, which can only be good for traction.

 

if you run the v grove tyres in reverse you will notice a bit more grip, the groves will lean more into each other and will give more contact area .

yes when power is applied the car will squat to near zero , thats pretty much an ideal setup

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You don't need any camber adjustment arms, Toyota put camber adjustment in as stock.

 

But apparently even adjusted all the way out you still get a few degrees negative camber at the rear - hence the PHR arms for positive camber.

 

Do you think you could develop a Supra drag suspension setup Chris? Offer it as a package, alternative to buying (very) expensive HKS Drag Coilovers.

 

Cheers,

 

Brian.

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But apparently even adjusted all the way out you still get a few degrees negative camber at the rear - hence the PHR arms for positive camber.

 

Do you think you could develop a Supra drag suspension setup Chris? Offer it as a package, alternative to buying (very) expensive HKS Drag Coilovers.

 

Cheers,

 

Brian.

 

I find it hard to sell decent suspension to you lot at the best of times :) It's not really my scene to be honest, and the car would be dire to drive normally, on the road, which raises liability issues.

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