Scuderia rollator CE86 trueno project
11-19-2009, 12:32 PM
Post: #58
 
And another bumpy...

Work is slowly progressing on both the KE25 and the AE86.. Won't bore you guys with details. Bad camera pics aren't much better, but they will have to do.

Updates so far:
Kouki bumper fitted.
Upgrade to spec-clutch stage3 paddle clutch
Nardi steering wheel

Also decided to redo the suspension. The old brake set-up really didn't slow the car down enough above say 180kph...and the car gets to those speeds VERY quickly, so that got interesting on a couple of occasions. I was really tempted to use the RX7 set-up, but after seeing a friend go through a lot of brake problems (no rx7 setup, but similar) decided to go for a tried and tested Wilwood solution.

Also the suspension wheel rates of the AE86 are still a mystery to me. The old 9/7 setup was undriveable.. that corresponds with this table for suspension frequencies:

0.5 - 1.5 Hz for passenger cars
1.5 - 2.0 Hz for sedan racecars and moderate downforce formula cars
3.0 - 5.0+ Hz for high downforce racecars

(From http://www.optimumg.com/OptimumGWebSite/..._Tip_1.pdf but many other sources as well)

9/7 corresponds to 3.6Hz/3.8Hz in our Trueno...way too high! So decided to try something else.. From the Ringmazda we found out that 1.9Hz works really well at the nordschleiffe. Since the nordschleiffe is like the ultimate touge, I reasoned that such frequencies would be well suited for a easily controllable car and a couple of rookie drivers.
In the end I ordered, 5.8kg/mmF and 4.5kg/mmR springs corresponding to 2.3Hz/2.4Hz. Anything softer would not match our short stroke suspensions range of stroke. So slightly above the ultimate touge setting and might need a bigger front bar at the track (we have one we can try)

Pics of the new setup:

[Image: AEU86 AE86 -  ]
[Image: AEU86 AE86 -  ]

Next steps: weld together the new alloy intercoolerpiping and replace most of the old silicone couplings. Reflashed ROM for slightly richer mixtures and set boost back to 16PSI. Also will be doing a mayor rework of all suspension settings on the car.

A wheel to steer the front of the car
A pedal to steer the rear
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