So this is the Thread about my Time Attack EVO VIII.

You can find detailed Pictures and stuff on our Facebook Page:
https://www.facebook.com/RoetheliRacing

Long story short:
2014: Got the Car from a Guy who used it for Time Attack and completely ****ed it up. The Car run 2007 in the 24h at the Nurburgring, so the basic was properly built.
2015: we rebuilt the whole car in 14 months and started racing in different Time Attack Series in Europe.
2016: we improved the car further and started with working more on the Aero
2017: a broken fuel rail fitting caused a fire and the car nearly burned to down. We stripped the car to a bare shell, dry ice blasted and repainted it.
2018: we rebuilt the car from scratch and solved a lot of problems we had in the past
2019: did a few test runs and now we sorted everything out and should be ready again for Season 2020.

Data:
Weight: 1‘100kg
Power: 735PS/860Nm
Engine: 2.3l with Dry Sump System
Fuel: E85 (85% Bioethanol)
Gearbox: sequential 6-Speed KAPS
Wheels: Weds Sport 10,5x18“ +12
Tire Size: 295/30/18 - 280/650/18
Brakes: Alcon 365x32mm
Suspension: Intrax 4-Way Black Titan XL
Width: about 200cm
Rear Wing: MT-Carbon - „RR special“ 200cm wide
Aerodynamics/Chassis: Nearly everything is special built for my Car and made from Carbon Fiber
Building Time: about 4’000h during the last 5 years

If you have any questions about the Details of the Car, let me know and i try to answer them.

 

Philip,

Maybe you can tell us a bit about the motor and turbo specifics:
Turbo (I see on FB an image of Precision, what turbo do you use?)
Dry Sump (Norris?)
Do you use - find it necessary - anti-lag, given that you run a torquey 2.3?
Rev-limit imposed?
What size exhaust do you run: 3" 3.5" or?


I believe you use SSB Design uprights and control arms, all 4 or front only?
Given your experience driving extreme Evo on track, can you explain how did the cars behaviour, propensity for understeer, change with uprights?
(I ask because most feedback so far was from Autocross (Gymkhana) competitors, a very different discipline compared to high speed Nurburgring, or Hockenheim Ring.)

Can you talk about differentials?
What do you use, what did you use before, and why you chose present configuration?

What about spring rates: are you running typical "US" stagger (like 16kg front 20kg rear) or are you running reverse stagger like Japanese and some UK competitors used to, or square setup?

Your car has a lot of aero, so your spring rates will differ from our typical near OEM setup Evos in US, but the stagger philosophy and chassis propensity to understeer are still apply.



Thank you Philip

 

I like racecars. thanks for sharing!

 

Are you in Zurich? I plan on visiting Switzerland next year and i'd like to stop by and check it out if you're close to Zurich.

 

@alpinaturbo
- Turbo is a Precision 6062 Gen 2 all V-Band with Header from Ross Sport in UK
- Dry Sump is from Titan Motorsports
- I don't run Anti-Lag. Never thought i need it. =)
- I'm not sure what my Rev-Limit is honestly. I think it's about 8'500rpm.
- It's a 3" 90° Bend from the Turbo into a 3,5" Exhaust.

Uprights
Yes, i run the SSB Design Uprights at the Front. And only the Uprights. We built our own Control Arms etc. to increase the front track by 40mm. If Budget allows it, we also get the rear Uprights this Winter. We didn’t had any Issues with Understeer in the past years. We cured that already with Suspension Setup, 295mm Tires etc. So the Uprights didn't really "help" with that. But the most remarkable difference was, that the car felt much lighter to turn.

Differentials
I honestly don't know what exact brand we had in the Car, because the previous owner couldn't tell me. What i knew: a NON ACD 1.5Way Front, mechanical Center and NON AYC 1 Way Rear.
We rebuilt it last Winter and changed to a 1.5 Way ATS Carbon Hybrid Front and a 1.5 Way Cusco Typre RS Spec-F Rear Differential.
One of the reasons for the ATS was, because there are not that much NON ACD Front Differentials around. And it was the right decision. It feels great and it can take a beating. =)
I had a Cusco Differential in my previous Race Car and where quite happy with it. That's why we got the Cusco at the Back.
They didn't changed the Car dramatically, but i feel the difference between the old, used Differentials to the new ones.

Spring Rates
That's a tricky one... We use linear springs.
A 180kg/cm +20kg/cm Helper Spring at the front and a 140kg/cm +3kg/cm Helper Spring at the rear. We're in constanct contact with Intrax Racing, sending them our Data and they helped us to get the right setup. So far, it worked pretty well. =)

@l888apex
In Switzerland nearly everything is close to Zurich. =)
But i live about 30min East of Zurich. So it's pretty close. Whenyou're in Switzerland, let me know.

 

Thanks for sharing! Love the write up and the pics! And the detailed Q&A's. Had fun comparing to my street/track set up. Appears I am on the right track....but another million dollars away to get sequential, aero, weight reduction, and higher end race suspension. LOL! When you need a backup driver or pit crew, hit me up. Never been to Switzerland.

Data:
Weight: 1‘100kg (2,425lbs to my 3100lbs)
Power: 735PS/860Nm (to my 700hp/550tq)
Engine: 2.3l with Dry Sump System (to my 2.2l with Dry Sump System)
Fuel: E85 (85% Bioethanol) (to my E85)
Gearbox: sequential 6-Speed KAPS (to my Shep stage 2 oem...Sequential is my next project)
Wheels: Weds Sport 10,5x18“ +12 (to my Enkei 18x10 +38...soon to be 18x10.5 +38)
Tire Size: 295/30/18 - 280/650/18 (to my 295/30/18)
Brakes: Alcon 365x32mm (to my AP Radi-Cal 372mmX34mm)
Suspension: Intrax 4-Way Black Titan XL (to my KW Race 2 way)
Width: about 200cm (to my oem body)
Rear Wing: MT-Carbon - „RR special“ 200cm wide (to my no aero )
Aerodynamics/Chassis: Nearly everything is special built for my Car and made from Carbon Fiber (To my custom fab lines and bolt ons)
Building Time: about 4’000h during the last 5 years (To my 5 years)

 

There are only a few reasons I can think of that heavier front springs can be an advantage.

1) Stock geometry on a heavily lowered car dictates a need for more front roll control because the extreme Front/Rear roll moment difference. This is probably my number 1 thought on why the EU/JA way of doing it this way exists. The rest is just regurgitation of old ways of thinking.
2) You actually want steady state understeer and use transition or heavy weight transfer (ala hand brake) to rotate the car. This seems to be a very European way of driving in hill climbs and rally.
3) Aero is more important and keeping the front splitter flat requires excessive front rates.
4) Weight reduction is so severe that its just how the math works out for baseline setups.

 

@Driv200
Sounds like a serious built. And an interesting comparison. Not all people share their Data as freely. So thank you.
And if you're ever in Switzerland, let me know and i'll give you a tour. =)

@Dallas J
Didn't took long to run into you. Thought you may be here as well.
It's mostly because reason nr. 3. Aero loads at over 200kp/h are becoming quite serious. And without the increased spring rates, my front would touch the ground quite hard.

And by the Way. The Uprights from Dallas or SSB-Designs, not only do they work very well, they're looking fantastic too.

 

Here is a short onboard of two laps at the European Time Attack on the Nurburgring. We had a lot of problems this day, so i was only able to drive these two laps...
Driving was ****, but at least at the end, we fixed all the issues.

 

Awesome to see this build. Also a huge shoutout to all the motorsports guys that still frequent this forum and progress the platform. I love seeing these cars still be relevant in the racing world.

 

I follow your team on facebook. I am glad to see you made a post on this forum. I enjoyed reading about the history of the Evo and the changes made to make it a competitor in time attack events.

 

Awesome 14!!! Page Article in the Motorwerks Magazine.

 

Very sweet.

 

Awesome Phil. Whats the schedule looking like now, whens the next races?

 

@Dallas J
Right now we‘re rebuilding the whole car.
It‘s completely dissasembled at the moment.

Next race will depend on when Winter is over.
Most likely first race is around May, but our first test will be in March or April.