The search for 1 g

[ma71supraturbo]

Over this upcoming year I will be gradually modifying the suspension on my '85 in the pursuit of 1.00 g's of lateral acceleration. Initially I plan to use DOT's to get there, but if I'm successful I hope to eventually make it on 200 treadwear tires. I'm just curious if anyone else has tried this before. It took me a few years to get my MK3 there, so I'm just throwing this out there to see if anyone has any setups that are close...


PS: I did search and got a bunch of worthless threads especially those talking about the g-tech. I'll be using the industry-standard 200' skidpad and an autocross timer...

[Supra_devil]

i want to get up towards that as well, and have a long list of parts and things i want to do to try and get there. myself i don't know where to go for testing though, not sure if edmonton even has a skid pad and testing equipement.

Gonna share your plans or wait till you hit the 1G to release what you've learned?

[ma71supraturbo]

Here's my tentative plan:

First I'll get a baseline of the car "stock." I'll remove the strut tower bar and pretend my car has stock bushings. I expect around .85 g given the grippier tires available today. Then strut tower bars and some coilovers (front and rear -- yes the rear will be custom). I expect a fair amount of trial and error on the spring rates -- it took me 3 sets to get the mk3 where I wanted. Then further chassis bracing (fender braces, B-pillar bar or maybe even a 4-point roll bar, possibly a "ladder" bar under the car). And if necessary, I'll modify alignment aides for the corolla to fit (roll-center adjusters etc). I hope to make it by this point, but if not I'll start playing around with the differential...

The MK3 required coilovers with custom spring rates (18/12 was the final setup), chassis bracing (the MDC harness bar that ties the upper front seatbelt mounts together with the rear lower seatbelt mounts -- it made the biggest difference in rigidity), no rear sway bar, aggressive alignment, and 245/40/17 SO3's on all four. The final list there is pretty short but I'd tried many different setups along the way (something it would be nice to avoid here lol)

[Supra GTR]

What do you consider DOT's. Toyo RA-1s, Pirelli PZero Corsa, Hoosier RS305 are all considered DOT's.

[ma71supraturbo]

Hoosiers, Victoracers, V700s etc

[joefoe]

All I have to say is make up some adjustable sway bars (or atleast a front one)! after front and rear coilovers with adjustable ride hight, sway bars and front camber you should be able to dial it in with out changing spring rates 3 times. On a corect set up the spring rate shouldn't have much to with skid pad performance, spring are for bumps. then getting the car to transition nice and balanced is a whole new ball game.

[ct20b drifter]

where do you get the MDC harness bar? i saw sumthing like that once but cant find it anymore

[ma71supraturbo]

its only for the MK3, but MDC Motorsports makes it. He has a vendor section on supramania.com