heinzboehmer's 2002 Topaz 6MT Coupe

[maupineda]

T


But now, the bad news. During one of the afternoon sessions, I came in a bit too hot into Phil Hill and completely missed the turn. Landed with the left tires in the dirt and the right on the pavement, which means I hit the curb at the bottom of the hill pretty hard against the undercarriage. I then drove back onto the pavement for a second and lost it again, spinning out into the dirt on the left side of the track.

Fortunately, the aluminum shear plate took ALL of the damage. I still can't believe I got as lucky as I did. Absolutely nothing else was damaged (including the brake and fuel lines right behind where I hit the car on the curb) and the car stayed right side up..

Want to run the carbon plate I am not using?

[bigjae46]

But now, the bad news. During one of the afternoon sessions, I came in a bit too hot into Phil Hill and completely missed the turn. Landed with the left tires in the dirt and the right on the pavement, which means I hit the curb at the bottom of the hill pretty hard against the undercarriage. I then drove back onto the pavement for a second and lost it again, spinning out into the dirt on the left side of the track.

Fortunately, the aluminum shear plate took ALL of the damage. I still can't believe I got as lucky as I did. Absolutely nothing else was damaged (including the brake and fuel lines right behind where I hit the car on the curb) and the car stayed right side up.

The worst part is not knowing how bad the damage is until you get into the paddock.

Let me know if you want a carbon plate!

[Slideways]

[oceansize]

Track day done. Some ups, one big down.

Let's start with the good stuff.

HK amp was really dying, so I picked a used one up, did a quick refresh on it (cleaned up and refreshed the thermal paste) and swapped it in:



And wow! I can't believe I had been putting up with the old amp for the last couple years. This thing sounds so much better. I kept having to turn the music down on the drive to the track cause I would hear details that I hadn't heard before and would think they were coming from the car. Pretty happy with this.

Then came a bit of CAD work. Scanned my hacked up filter housing prototype and made the changes necessary for installing:



I have to say that the 3D printer + scanner combo is incredibly powerful. Iterating on this piece would have taken way, way longer had I not had access to these tools.

Test fit piece printing now. Once that is validated, I can move on to printing the entire thing out of PET-CF.

Also, good news is that I didn't see the windshield mount temp go above 70 C, even after letting the car heatsoak in the sun for an hour or so. I'll pull the data later and grab the actual numbers.

But now, the bad news. During one of the afternoon sessions, I came in a bit too hot into Phil Hill and completely missed the turn. Landed with the left tires in the dirt and the right on the pavement, which means I hit the curb at the bottom of the hill pretty hard against the undercarriage. I then drove back onto the pavement for a second and lost it again, spinning out into the dirt on the left side of the track.

Fortunately, the aluminum shear plate took ALL of the damage. I still can't believe I got as lucky as I did. Absolutely nothing else was damaged (including the brake and fuel lines right behind where I hit the car on the curb) and the car stayed right side up.

Having used up all of my luck, I decided to call it and spent the rest of the day cleaning the car up, which wasn't exactly fun. This is what the interior looked like immediately after coming into the paddock:

Vacuumed out what I could, then used compressed air from the tire shop to blow out the rest. Still needs a serious detail (which unfortunately involves removing a ton of the interior trim pieces to get behind them), but all in all, not a terrible result:

Replacement parts ordered. Will spend some hours this week disassembling and cleaning up the car, then can analyze the thermocouple data.

All in all, not the best track day experience I've had, but very glad it wasn't worse. Car drove straight for the entire four hour drive home, all fluids stayed in their places, E86 braces survived and most importantly, no one was hurt.

Hence the old saying "I would rather be lucky than good" 🤣

[Obioban]

Glad there was no damage!

My excursion would have been similar to yours had that curb not been there. Really messed with the grip in the rear when getting to the bottom of the hill.

Still haven't pulled video off of my car, but this is pretty much exactly what I did: https://www.youtube.com/watch?v=1Fg_vP5IYRA

That looks exciting

[heinzboehmer]

Dang man, glad you're okay!

Thanks! Still can't believe I didn't hit anyone or anything. Best worst case for sure.

Ha.

Last Saturday I was tracking while sick and accidentally had a 100+ mph off roading session. Happily recognized it was happening and went off straight, got control, pulled her back on... no damage at all.

Certainly the fastest I've ever driven on grass. Sketchy.

Downgraded myself to intermediate for the next day, so I could take it slow.

Glad there was no damage!

My excursion would have been similar to yours had that curb not been there. Really messed with the grip in the rear when getting to the bottom of the hill.

Still haven't pulled video off of my car, but this is pretty much exactly what I did: https://www.youtube.com/watch?v=1Fg_vP5IYRA

[Obioban]

Ha.

Last Saturday I was tracking while sick and accidentally had a 100+ mph off roading session. Happily recognized it was happening and went off straight, got control, pulled her back on... no damage at all.

Certainly the fastest I've ever driven on grass. Sketchy.

Downgraded myself to intermediate for the next day, so I could take it slow.

[YoitsTmac]

Dang man, glad you're okay!

[heinzboehmer]

Track day done. Some ups, one big down.

Let's start with the good stuff.

HK amp was really dying, so I picked a used one up, did a quick refresh on it (cleaned up and refreshed the thermal paste) and swapped it in:



And wow! I can't believe I had been putting up with the old amp for the last couple years. This thing sounds so much better. I kept having to turn the music down on the drive to the track cause I would hear details that I hadn't heard before and would think they were coming from the car. Pretty happy with this.

Then came a bit of CAD work. Scanned my hacked up filter housing prototype and made the changes necessary for installing:



I have to say that the 3D printer + scanner combo is incredibly powerful. Iterating on this piece would have taken way, way longer had I not had access to these tools.

Test fit piece printing now. Once that is validated, I can move on to printing the entire thing out of PET-CF.

Also, good news is that I didn't see the windshield mount temp go above 70 C, even after letting the car heatsoak in the sun for an hour or so. I'll pull the data later and grab the actual numbers.


But now, the bad news. During one of the afternoon sessions, I came in a bit too hot into Phil Hill and completely missed the turn. Landed with the left tires in the dirt and the right on the pavement, which means I hit the curb at the bottom of the hill pretty hard against the undercarriage. I then drove back onto the pavement for a second and lost it again, spinning out into the dirt on the left side of the track.

Fortunately, the aluminum shear plate took ALL of the damage. I still can't believe I got as lucky as I did. Absolutely nothing else was damaged (including the brake and fuel lines right behind where I hit the car on the curb) and the car stayed right side up.



Having used up all of my luck, I decided to call it and spent the rest of the day cleaning the car up, which wasn't exactly fun. This is what the interior looked like immediately after coming into the paddock:



Vacuumed out what I could, then used compressed air from the tire shop to blow out the rest. Still needs a serious detail (which unfortunately involves removing a ton of the interior trim pieces to get behind them), but all in all, not a terrible result:



Replacement parts ordered. Will spend some hours this week disassembling and cleaning up the car, then can analyze the thermocouple data.

All in all, not the best track day experience I've had, but very glad it wasn't worse. Car drove straight for the entire four hour drive home, all fluids stayed in their places, E86 braces survived and most importantly, no one was hurt.

[heinzboehmer]

Man, modern 3D printers are unbelievable. Look at how well mine was able to replicate the "held together with duct tape" look:




Clearly, there were some fitment issues with the prototype.

Since the triangle that the braces form is wider in the front than it is in the back, the filter housing has to have extra clearance for install. Thought I had given it enough, but I was mistaken.

Images above are post modifications and the housing fits pretty great like that. I've scanned the hacked up piece to use as a reference and will design V2 around that.

Everything else fit up perfect first try though:





Don't think I can feel too much of an airflow difference with this housing vs the stock one with the fan at full blast. But all I did was stick my hand in there and judge based on that, so not a scientific claim in the slightest.

Pretty happy with this first attempt. Couple tweaks and it should be good to go!

[heinzboehmer]

What’s the hole diameter needed for that plug? I need something for mine as the body plug has crumbled and I don’t want to load the printer with TPU just for that.

Ha, I had the exact same thought process with the printer.

Hole diameter is 40 mm.

[Bry5on]

What’s the hole diameter needed for that plug? I need something for mine as the body plug has crumbled and I don’t want to load the printer with TPU just for that.

[heinzboehmer]

So, turns out Corteco makes two versions of the F25 filters. One activated charcoal and one not. Of course, I bought the one without activated charcoal:



FCP shows the activated charcoal version on their site and a recent review mentions that they are indeed the activated charcoal version:




Gonna try ordering those and see what I receive. Fortunately, these things are ultra cheap.

Also, CAD is done! Pretty cool to finally see the whole assembly put together.



The hole in the top of the cabin air filter housing is there to provide tool access for the middle fastener.



Found this appropriately named plug to cover it. Funnily enough, this one can also be found on an F25 X3.



Printing out a prototype in ABS since the PET-CF filament I ordered did not arrive in time for my track day. Based on the temp data from yesterday, ABS should survive, but guess I'll be putting that to the test.

Roughly 24 hours to go on the prints, so will update in a bit

[heinzboehmer]

Oh forgot to mention this filter, which is another candidate: Chrysler 68033193AA

It just barely squeezes in and will likely require some trimming of the cowl to work. Surface area is a bit bigger than the X3 filters, but it's 10 mm shorter and it doesn't come in a variant with activated charcoal. Sooo I'm sticking with the X3 filters.

Also, I know I can get the Mann version of the filter, but I just don't think I'd be able to live with having a Chrysler part on the car. X3 filters it is.

[heinzboehmer]

I love this project so much. Also makes me want to build some thermal read to all my brakes

Oh man, I'm geeking out over having access to this telemetry.

Will for sure need to figure out a way to route the thermocouples to the calipers once this testing is done. That sounds like awesome data to have.