IRS into Ta22 celica

[shelldrake]

I've got an lsd in there already atm. After going around the Island it got real noisy by the last session. I'd really like to sort out several issues in one hit.

Datsun/Alpha options could be a good idea...

I'd be happy to put flares on if the shortest one found did sit outside the guards.

I think I will be putting this car onto club reg, but would like it to be engineered for road registered use if required in the future.

[TurboRA28]

I had to put some baffles in my lsd live axle to stop it killing gears.. since baffling it i've done heaps of track time and no dramas.
The datto stuff is semi trailing arm though so I think if you go to all that trouble a double wishbone design like the S13 would be better?
A mate of mine put a 280z irs rear end in an old rwd lancer which is narrower than a celica and it fitted. Results are good.. But a lot of work.

[JustenGT8]

Honestly, give this idea away. The risk of having a car that handles worse is high, and the potential benefit is small.

The Datto gear is 60's, basic, heavy and not even close to worth the effort.

Just look at the live axle cars getting around very quickly....maybe after a good few years track experience you 'might' be able to find a bit of extra time with well engineered IRS... if this can even be achieved.

The only worth i can see in undertaking this swap is as an interesting engineering exercise. The money that would be wasted on this exercise, spent elsewhere on the car will have you quicker no question.

[WDE_BDY]

If your car is already reasonably well setup then I agree it just isn't worth it. The swap was only done on my car as I used everything from the donor car and even with the considerable body work it was cheaper than trying to do suspension, brake and diff upgrades individually to handle the horsepower I want to run.

Callum

[3jcelica]

In terms of classes, rule out improved production as this would not be allowed. I also dont think an IRS would pay off it terms of lower track time V's money spent. Some of the faster cars I have seen in improved production run leaf springs.

[SilverRA23]

Glen's right I reckon. Spend the money you would have spent on engineering an IRS install, on really good suspension for your current set up. Put good semi-slicks on it. Then practice practice practice.

I disagree with the MX5 being a car that would run rings around the Celica (though you would theink they should being more modern etc) - my little Corolla with its massive 67kw at the rear wheels has rounded up more than one or two MX5's on the track. I think its more about the experience of the steerer and the car set up, than it is the IRS.

[Celica RA45]

by the way eddie meant to tell you the island kills crown wheel and pinions unless you have GT rear baffles and tubes that sit 2mm away from diff center

[TurboRA28]

Glenn, you'd have some good information on making the celica rear end work well?

[Celica RA45]

on the back i use the std rubber bushes also use a adjustable panhard with rose joints .use hose clamps to keep the rear springs on there platform base also use a rear sway bar at flowing circuits but disconnect at say wakefield ,winton and calder etc and my latest device is adjustable roll center which moves the panhard up or down
up is in std height and i have 4 holes at 25mm which i can move down ,which lowers the roll center at the back
on the front i use 45mm alloy blocks under the strut and the lower arm and use 5.5 degress of caster and 5 degress of negitive camber as well

[TurboRA28]

Have you ever considered watt's link on the rear, or think the panhard is acceptable?
How do you get the 5 deg of camber? I run 20mm longer control arms and strut tops dialed in to the max and only just get 3.5deg. If i remove the roll centre blocks I get more but like to run these..

[Celica RA45]

mx62 lower arms

[timbosaurus]

Ed, as most people have said...

Early semi trailing arm (datto/corona etc) - heavy, don't have great dynamic camber changes, along with a major PITA to fit. Huge chance of having a bucket of shit at the end.

Late model wishbone style - heavy, along with a major PITA to fit. Chance of having a bucket of shit at the end.

Both will need a LOT of work, a LOT of cutting up your car, neither will put smiles on engineers face, and neither will be cheap or quick to do... especially if you don't fabricate it yourself.

IRS into celicas suits those more interested in proving their mechanical skills, and wanting an individual ride. Certainly not worth the pain.

The most successful IPRA make would have to be the S123 RX7... and it's live axle, so it certainly can be made to work very well. I think there is a lot more that can be done to your car before looking into this

Edit: I agree with Ian, that your 22 is too nice to chop. I hope it never suffers any battle damage. Alternatively, you could buy a race ready Levin that you don't have to worry about, and look after your '22 like you should

[ian]

good point timbo
i have an old ra 28 shell that we could graft on to the levins floor pan less work than fitting an IRS to a 22