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Agree with the gurney flap placement, i missed that earlier. though that should be obvious once you run the cfd - the surface pressure would be really low after the gurney, so you might as well cut it off

No tears in the fabric but does have scratches on the back (some, pictured) and bottom (lots, not pictured). FIA rating valid until 2028 - still has two more years of eligibility for racing, or can be used for HPDE indefinitely. Seat bottom cushion and leg pads have been changed out to "Confor"...

Sparco circuit ii is a confirmed fit with pci sliders. The shoulder bolster barely touches the door card, but you can slide a piece of paper between. There is a finger gap between the seat and the tunnel so in theory I could shift it over, but I don't really feel like it.

In general, i would avoid making CFD claims that you have run yourself, unless you have a academic/professional background in it. You will get torn apart by real aero experts (which I am not). CFD analysis is typically done in steps. 1. Standalone wing. Use a wing with a lot of published data...

Actually now that I think about it, including a set of washers/shims would do the trick. Looks like the thread pitch is 3.175mm, so you'd need to include 2 shims of 1mm thickness, so people could dial in 120-ish deg of tightening torque

From the perrin website: Looks like perrin uses 6061. If they were made out of something like 7075, it would double the strength and make it comparable to something like the mild steel that's used in roll cages

My other thought was using a jamnut. But i believe the tow hook hole is not a standard thread (Google says it's called a knuckle thread), so I'm not sure if such a nut exists off-the-shelf.

Your hook design is asymmetric. How will you ensure that the tow hook is clocked correctly to meet up with the cover, without being over torqued or completely loose? Unlike flat bar stock designs that would need to rotate an additional 180 deg to be flat again, yours would need to rotate another...

Elite ball knowledge. Can't wait to try it.

Can you confirm track skip/back works?

While the modifications are simple, they are time consuming with a lot of trial and error with test fittings and waiting on additional parts. Dont forget the the time and added cost of the verus reinforcement rods as well.

The unlock would need to shipped out, regardless of who you pick. Lots of good bmw shops in the area, but you are correct AMS is a top choice and I think they did jackie ding's ta90 tune. But for that power level, you can just use an OTS map that comes with MHD and turn it down slightly to say...

At the end of the day it's all statistics. One guy could launch all day on drag pack and be fine, another unlucky guy will snap his axles the first time he wheel hops. Could be totally out of his control, a bad grain boundary or inclusion/porosity in the shaft. If you don't want to break an...

Nothing wrong with them, still in the original shrink wrap packaging. 250 shipped to CONUS Price drop 200

Great condition, pulled from a 2023 Supra with 15k miles. No rips or tears in the leather, all mechanicals work. You will need to transfer your own seat belt Buckles, since i moved them to my new seats. You can also buy a used set, they are the same across all BMWs, part number 7313299. $1000...

Ambient was upper 60s/lower 70s this day (no idea what a good range is)

I replaced the crankcase side with a breather. The intake side i believe i used a flush mount brass pex plug.

That breather is way too big. The port in the block is 1/4 inch. https://www.supramkv.com/threads/crankshaft-breather-hose.18485/page-2#post-529054 @RacerJohnny you can have it free, just pay shipping. shoot me your address (or come pick it up, South suburbs Chicago)

Used the pci adjustable setup for an sparco evo xl on the passenger side. https://www.pci-racing.com/product/adjustable-seat-mounts/?srsltid=AfmBOooeIx6f8fzuTVGNBT76AYu-fK-xfGddMZc73c4bh4g78CWj3ILl No need to use the spacers with this setup. What's nice is you can rotate the front of the seat...