TA22 Spring rates?

[Turdinator]

This is the front to rear weight balance in my car. I want to run 6kg/mm on the fronts. What should i run on the rear for a starting point towards neutral setup?

I read somewhere that 2/3 front rate is usually a good starting point. That would be 3.96 or 4kg/mm in reality.

Opinions anyone?

[Turdinator]

Anyone????

[IN 05 NT]

what are you using the car for? circuit, street driving, drag?

i run 7kgs in the front....and roughly 3kgs in the rear......the front is pretty much solid, and very rough/hard for the street, the rear is still a lil soft and looking to upgrade to round the 4kgs in the rear....

but, saying that, i hardly drive my celica on the road, mainly only club event/races

ive also got more weight over the front compared to you also.

[Turdinator]

At the moment the car is very much a weekend car. I'm looking to set the suspension up for motokhana or the occasional hill climb with some weekend street driving.

[IN 05 NT]

tarmac motorkhanas/hill clibms will be fine with those rates,....any dirt events and they are too hard..... tho it didnt stop me from the last dirt event

[andy1827]

im just getting some suspension from T3 made up at the moment for my ta22. im going to be using the car mainly for street with track events once a month and he recommended 7kg at front and 5.7kg at rear would be fine.
hope that helps
Andrew

[Roundy]

I can't remember where i picked it up, but matching the front/rear wheel rates to the front/rear weight bias can be a good starting point.

To get a neutral car my understanding is the roll stiffness front/rear should match the weight distribution front/rear...at least in theory

so assuming the wheel rate = the spring rate (which it won't) should give ~4.7kg/mm on the rear.

What is the suspension setup on the TA22

Using that theory on my GT4 seems to have worked somewhat for me...still understeers, but no-where near as bad as before.

It is a lot more complex then that, but finding info on it seems to be like getting blood from a stone (or my googling sucks, which is a distinct possibility)

[Turdinator]

tarmac motorkhanas/hill clibms will be fine with those rates,....any dirt events and they are too hard..... tho it didnt stop me from the last dirt event

True. I had been considering things from a tarmac point of view. Would still be fun on dirt i'm sure but i'll concentrate on tarmac at this point.

im just getting some suspension from T3 made up at the moment for my ta22. im going to be using the car mainly for street with track events once a month and he recommended 7kg at front and 5.7kg at rear would be fine.
hope that helps
Andrew

Interesting. I like the T3 stuff. I just bought a few of Gabe's parts. Very nicely made. The spring recommendations on their site always seemed a bit stiff at the rear. I figured this was due to sprinters having a better (50:50) weight balance than 22's and the need for a stiffer rear end for drifting...

Will be interested to see how yours goes. Are you going with rear coilovers as well? If so how are you strengthening the diff and chassis to cope?

[Turdinator]

Double post

[Turdinator]

I can't remember where i picked it up, but matching the front/rear wheel rates to the front/rear weight bias can be a good starting point.

To get a neutral car my understanding is the roll stiffness front/rear should match the weight distribution front/rear...at least in theory

so assuming the wheel rate = the spring rate (which it won't) should give ~4.7kg/mm on the rear.

What is the suspension setup on the TA22

Using that theory on my GT4 seems to have worked somewhat for me...still understeers, but no-where near as bad as before.

It is a lot more complex then that, but finding info on it seems to be like getting blood from a stone (or my googling sucks, which is a distinct possibility)

I think that theory would work quite well for a AWD car like the GT4, but RWD generally needs a softer rear end to get the power down. Or at least thats my general understanding.

[Roundy]

Indeed you are right there, but it is a starting point.

The 4 is still a touch softer relatively in the rear, understeer is a bit safer.

[Tonyger]

I know this is a very old thread but was the test with you in or out of the car. Following what I've been told and read here and there, you'd want to have a soft spring up front and a heavier spring in the rear due to the weight distirubtion or am I wrong?

[Celica RA45]

try 300lbs for the front and 200lbs for the rear

[Tonyger]

try 300lbs for the front and 200lbs for the rear

Thats about 5kgs in the front 3.5 kg in the rear? That would be fine for daily driving. I think I would need to go stiffer if I were to track.

I know the dgr coilovers are 7kgs up front and 8 in the rear.

[Celica RA45]

im using 300 lbs for the front of my ra45 and 230 for the back , weight of my car is 970 kilos before i get in with full on roll cage and gt rear end
shockers and sway bar s have a lot to how the car drives as well as well as coilovers as well
the ta22 is very similar to a ra40 series coupe
weight split on mine is 52 front 48 rear