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Switched to Kumho V730's as they are only $195 as opposed to AR1's that cost $360 , ran the V730's the other day for 4 x 20 min sessions , gave the same grip as the AR1's and stayed consistent for the 20 minutes . They like hot pressure of 35psi as they have a softer sidewall than the AR1's . For the price I will stick with the V730's for the time being.
Update on Kumho V730 they like to run at 33.5psi hot and stiff suspension for Phillip Island race Track . They do not have as much mid corner grip as the AR1's but very close in lap times.
 
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since you have the carbon hood from SJ, do you experienced any difference to the coolant temps?
 
I actually miss a solution to the coolanttemp. problem.
I am already planning a new radiator for the car - not quite easy though, since the mounting brackets are super complicated to make and space is rare.

The only existing radiator I know of is from PWR, but they only offer it in combination with the intercooler (that way they dont have to worry about mounting it properly - since its mounted to the intercooler).

I dont know any other solution for fixing the high coolant temps on track as of now :/
 
Some things happened during the off-season. Here's what happened so far:

- Painted Parts
- New Front Bumper
- New Fender Vents
- Tire Temp Monitoring
- Power distribution for my sensors
- Rear brakes
- Suspension overhaul

Painted Parts

As mentioned in my last post, I send over quite a few parts to the paint shop. Here are the results:
hvGeNOv.jpeg


50ZseOM.jpeg


Really happy with the results. In total the following parts were painted:
- Carbon Hood
- Fenders
- Front Bumper
- Rear Struts for my DIY Clubsport Net.


New Front Bumper

Since my old bumper had multiple issues (hit and run parking accident, front lip broke the bumper, broken clips on the fender side) I ordered a new one from Hyundai. After the paint shop, I had to move over all the parts from the old lip to the new one. Not super amusing work :D
Also swapped my old lip which caused part of the damage for a new one.

pGy3oeA.jpeg


YHzTTSN.jpeg



Fender Vents

If you remember, the new (used) fenders had a big hole in the side for better wheel well ventilation. I didn't really like the look of that "hole", so I decided to design a proper vent for it:

QaFULHh.jpeg


vkeHils.jpeg



Tire Temp Monitoring

I wanted to have proper tire temp monitoring for the track - the OEM system via the OBD Port does not really work good enough for me anymore, so I decided to grab some motorsports components and install them:

TrtIsF1.jpeg


Those are 16Ch IR Tire Temperature Monitoring Sensors which can monitor the tire temperature across the full width of the tire. Helpful to tailor in the correct camber settings and they are also real-time (not like the OEM TPMS stuff). They are also far more accurate since they measure the temperature of the actual tire surface - the OEM TPMS stuff measures the temperature inside of the tire where the TPMS sensor is placed.

Currently struggling a bit with the CANBUS stuff, since my own CAN network is growing rapidly and I have a bit of .... lets call it "technical debt" :D


Power distribution for my sensors

Part of that "technical debt" was the 12V power distribution to all my sensors in the front. I ordered a 12V power distribution module, so that I would be able to connect all my different sensors properly and not directly to the battery terminals. Small disadvantage: Everything is wired directly to the battery, so the components don't shut off - but since we are only talking about a few sensors with a max power draw of 0.15 amps that shouldn't matter too much.

Z8Bprqt.jpeg


I will also re-do some of the wiring of my Canbus network, to make sure the data consistency is improved.


Rear brakes:
I also upgraded my rear brakes - mainly because the rotos where shot and I wanted a bit more bite on the rear axle. Used DBA Rotors together with Pagid RSL29 pads.
xR1h08h.jpeg



Suspension overhaul:

I also send my KW v3 Clubsport to a company for a revision, since I felt the dampers were making some noise and since it was bought used and the price for the overhaul was fair, I pulled the trigger. Super happy with their work (in terms of cleaning at least - haven't driven the car yet :D).
Overhaul only targeted the dampers. They were cleaned, emptied, refilled and resealed. Afterwards they went on a test bench and the damping setup was re-adjusted to fit to the OEM specs.

pxv2cpB.jpeg



Next steps are :
- bigger brake cooling with custom braided brake lines.
- custom front underfloor protection with integrated gearbox cooling.
 
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I'm honestly curious about what the TÜVs opinion is on all the mods, like the extra sensors, custom vents, etc.
the sensors didn't care the last TÜV-inspector at all - for the vents I would assume some inspectors would have an issue with my fender vent - but on the other hand I do have a material certificate for it, so in theory I should even be able to get it in my papers :D
 
Have I forgotten to update this thread? Mhmm, maybe! :p
Have some updates!


Overview:
- New Tires (Yokohama A052)
- CFD-Work
- DIY Front Undertray / Splitter
- Carbon Roof
- New Product: Fender Vents for OEM and widened Fenders



I will not post about all the Trackdays I've been to, but a few pics nontheless:

Btw, here's what my current logging setup looks like. Car still runs like a champ!
cv7nzmZ.png


New Tires (Yokohama A052)
In Oschersleben I switched to 245 fronts and 225 rears Yokohama A052. These are even wider than 255 fronts as Nankang AR-1s. So no real downgrade there. Phenomenal tire, although I have to work on my setup to make it live a bit longer.


CFD-Work
Since I was a bit bored during the summer break, I decided to dive a bit into CFD. Was quite a steep learning curve, but in the end I managed to simulate a splitter, I was working on, as well as my fender vents. Still have to fully understand how to calculate actual downforce figures, but I think I am on a good way. Here are some pics of some of the sims, I did:


DIY Front Undertray / Splitter
After a few refinements in CFD, I decided to built a not-so-over-the-top version of the digital splitter out of some wood. I laminated it with some glass fibre for longeavity and gave it a coating of underbody protection afterwards. Mounting was very hard to do, but in the end I managed. Will work on a cleaner v2 with better mounting and maybe out of CFK, not sure yet. Important for me was, that this version already survived all the track abuse and while being chassis-mounted. Even noticed some improvements in brake cooling because of the splitter tunnels in front of the wheel arches :D

Carbon Roof
Since my car moves more and more towards the track side of things and its no longer my daily, I figured time for some real fun and replace that heavy panoramic roof with a carbon one! Who needs to see through a roof anyway, right? :D

SJ-Exclusive performed the surgery and I am very pleased with the result!

The trick especially with my roof is, that I wanted to keep the oem headliner. So I got one of a non-panoramic-roof-model and hope to get it mounted soon. Currently still waiting for some parts. But this special request of mine meant, that there was a bit more work involved then "just" replacing the roof.

New Product: Fender Vents for OEM and widened Fenders
I am also happy to say, that I could finally start production on the first prototype for my fender vents, which fit the OEM fenders. The one's shown in previous posts were for the widened Mücke fenders, but I now have a prototype ready for installation of the OEM ones, too! Hope to get this fitted up, soon. Will come as unpainted only for now. Those are printed with resin, so smooth as butter straight out of the 3d printer!
 
Awesome update 😍 I’m really jealous of the carbon-fiber roof, even though exposed carbon isn’t an option for me looks-wise and I’d have to add sound deadening to the roof again 🙈
 
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of course I had to run down to the car to check if that prototype from the previous post would fit.
Aaaaaaaaaaaaaaand it fits like a glove 😍

zSvv2h5.jpg

Still enough ground clearance (~9,5cm / 8cm are required by law here in Germany)

SVGJIgA.jpg

Here you can see the adapter pipe behind the wishbone to which the hose will get mounted.

I3SoR0T.jpg

and this small gap from the lower left to the upper right has to be filled in by the hose
Hi I was debating on buying the speed engineering set (https://tinyurl.com/3dsm9372). However after seeing your issues I was wondering if the setup your running now is available for purchase through dm or elsewhere? Or do you have any recommendations regarding to brake cooling? Thanks in advance
 
Hi I was debating on buying the speed engineering set (https://tinyurl.com/3dsm9372). However after seeing your issues I was wondering if the setup your running now is available for purchase through dm or elsewhere? Or do you have any recommendations regarding to brake cooling? Thanks in advance
I've sent you a PM.
 
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Hi I sent you a DM asking the same question (was always intending on purchasing your set, got round to it and shop seems to have closed). Any advice much appreciated!