Rally Project

[NoHachi]

For rallying, my dumb opinion, would be to stick to things that are known to work and easy to replace. That might be the case with stock GT4 celica stuff. I don't know enough about them to make an educated guess.

A couple of setups have been proven time and time again. Best known example is the Escort MK2 GP4. Eerily similar to the AE86.
In the front they run simple linear valved bilsteins that come in 3 valvings and two lengths. Gravel, Forest en Asfalt or something along those lines. They are rallied in huge numbers and front running cars often compete with WRC stuff on the same 90gbp bilstein dampers.

They'll drop right into a AE86 strut housing if you drill the bottom of the strut for the retaining nut. That would be my approach with stock length AE86 struts.

Steal your spring rates from the Escorts too. The dampers will be valved for them (huge advantage) and you get to use decades of competition experience. 5kg might be a tad too much.
Corner weight/motion ratio's etc. are all extremely close, so thing are comparable

Rear escort shock will drop right in. Come to think of it, a lot of rally 86 in the UK and Eire run Escort stuff, complete with the struts and the Atlas rear axle.

Simple, cheap and proven. IMHO too big of an advantage to start mucking about and experimenting.