Track forum general chit chat.

[M3 Number 86]

Originally Posted by dparm

Thought this was a great read on how rear diffusers actually work and the practical limits to what they can do.

https://grassrootsmotorsports.com/ar...ers-explained/

have you seen Kyle.Engineers youtube channel? He has tons of aero videos and also helped AJ Hartmann develop some stuff. He's on AMG Petronas F1 team now (or some F1 team) as an aerodynamicist.

[kyippee]

Originally Posted by M3 Number 86

you didn't pass sound with bomiz closed and oem xpipe?!

I'm swapping to oem xpipe for my smog check / registration due in May. Laguna is in end of June. Maybe I'll just keep it on with a stock tune for that day to play it safe. It's just so much slower without tune and with cats lol

I have the macht schnell quad resonated xpipe and with the oem mufflers to me it sounds pretty quiet already. Not sure if I should roll the dice and for sure I'm not taking no extra xpipe with me.

I think my set up would be quieter than an akra evo set up though.....

Would be ridiculous to run laguna pipes on oem muffler lol

Correct. I believe the cold, damp air on Saturday made it read higher than usual @ 90.4

FYI, MPE v2 with stock rest of exhaust system DID pass sound, 3rd gear WOT uphill.

[derbo]

Originally Posted by M3 Number 86

you didn't pass sound with bomiz closed and oem xpipe?!

I'm swapping to oem xpipe for my smog check / registration due in May. Laguna is in end of June. Maybe I'll just keep it on with a stock tune for that day to play it safe. It's just so much slower without tune and with cats lol

I have the macht schnell quad resonated xpipe and with the oem mufflers to me it sounds pretty quiet already. Not sure if I should roll the dice and for sure I'm not taking no extra xpipe with me.

I think my set up would be quieter than an akra evo set up though.....

Would be ridiculous to run laguna pipes on oem muffler lol

Do it to say you did it.

I have stock everything except OEM exhaust mod and it passed.

[bigjae1976]

Originally Posted by M3 Number 86

have you seen Kyle.Engineers youtube channel? He has tons of aero videos and also helped AJ Hartmann develop some stuff. He's on AMG Petronas F1 team now (or some F1 team) as an aerodynamicist.

I've seen his videos, very informative. Interesting to read the article and then Kyle explains that the strakes on the diffuser manage tire squirt. Funny you mentioned kyle.engineers because I've been using his videos to help design my custom diffuser on my e46.

[XKxRome0ox]

i just signed up for my first track day with the e90 m3
Willow Springs - Streets of Willow Springs
Speed Ventures
May 11, 2019

excited and nervous
especially since it's been almost 2 years since i've done a track day
i'm a newbie
previously i've done 2 days at Autoclub Speedway and 2 days at Buttonwillow in my F30 328i

anything I should be aware of at Streets of Willow?
I watched one video so far
the track edges don't have much markings or those striped concrete areas

[roastbeef]

I've been throttling this turbo stang around Maui for the past week. It sucks. Got some off-roading in though.

[StripclubDJ]

Originally Posted by roastbeef

I've been throttling this turbo stang around Maui for the past week. It sucks. Got some off-roading in though.

.

[Chris_PDX]

Just going to leave this here. From today's track day at PIR. Some poo may of come out when I saw that fucking thing.

https://www.youtube.com/watch?v=SACn...ature=youtu.be

[admranger]

Originally Posted by dparm

How do NASA HPDEs compare to other organizations? They have a weekend event at COTA in two weeks that I'm considering doing, but I have never run with NASA. I don't want something overly pedantic and anal, but I definitely don't want a loosey-goosey thing where people go full-retard.

It's also a bit unclear to me how it works with these groups...since I've never run with them, but have experience, do I have to start at the bottom and work my way up or something?

All NASA regions are different. I have raced at NASA organized events in California (NorCal and SoCal regions).

BMW club that runs events at COTA has a nice event. I instructed there in 2016 with them and it appeared to be very well run and there were lots and lots of non-BMWs there so don't worry about that.

Back to racing with NASA during the Permian era. They had a class called American Iron -- older 5.0 liter Mustangs, Cameros, etc. completely stripped down and fast. BMW Club had small fields at some races and they'd toss us in with those guys in a split start. I distinctly remember being in my 1987 325iS in stock form getting passed by two of those cars in the esses at Buttonwillow. How'd they pass in the esses? Easy, they just went onto the dirt and kept their foot down. Scary/funny as hell.

[derbo]

Originally Posted by Chris_PDX

Just going to leave this here. From today's track day at PIR. Some poo may of come out when I saw that fucking thing.

https://www.youtube.com/watch?v=SACn...ature=youtu.be

Laguna Seca has a squirrel problem but apparently, geese is now another issue.

[roastbeef]

Certain times of the year, laguna seca has a orange/yellow striped meatball flag that means there are geese on the track. On of those big boys could end your day. Lol

[PrimeBMW]

Originally Posted by Chris_PDX

Just going to leave this here. From today's track day at PIR. Some poo may of come out when I saw that fucking thing.

https://www.youtube.com/watch?v=SACnlq9CymQ&feature=youtu.be

I had to slow it down even stop the video! Wow crazy! Maybe it was a good thing I didn't make it out yesterday. I would have been heart broken if the front of the race car was destroyed.

[M3 Number 86]

Track day at the zoo lol

[dparm]

Enjoy your daily dose of rage.

[OG Shark]

Originally Posted by Chris_PDX

Just going to leave this here. From today's track day at PIR. Some poo may of come out when I saw that fucking thing.

https://www.youtube.com/watch?v=SACn...ature=youtu.be

If you think you had a little poo - imagine how much came out of that bird...

Poor guy just sitting there minding his own business, all of the sudden two huge chunks of metal come screaming past him. Probably had a heart attack.

[Ximian]

Ordered some Motul brake juice so I unpacked the Motive bleeder I ordered last year. Starting with the dry pressure test, it lost 3 PSI per minute starting at 15 PSI. According to FCP Euro, they had a manufacturing defect last year so I'm getting a replacement.

Check yours if you ordered one last year.

[roastbeef]

Originally Posted by Ximian

Ordered some Motul brake juice so I unpacked the Motive bleeder I ordered last year. Starting with the dry pressure test, it lost 3 PSI per minute starting at 15 PSI. According to FCP Euro, they had a manufacturing defect last year so I'm getting a replacement.

Check yours if you ordered one last year.

Crap... I got one last year and I have two brake jobs planned.

[SAMM3Y]

Turner selling a new pwr rad and oil cooler if anyone fancies it.. https://rover.ebay.com/rover/0/0/0?m...2F254210221965

[dparm]

Originally Posted by Ximian

Ordered some Motul brake juice so I unpacked the Motive bleeder I ordered last year. Starting with the dry pressure test, it lost 3 PSI per minute starting at 15 PSI. According to FCP Euro, they had a manufacturing defect last year so I'm getting a replacement.

Check yours if you ordered one last year.

I got one for Christmas. What's the test procedure?

[bigjae1976]

Originally Posted by Ximian

Ordered some Motul brake juice so I unpacked the Motive bleeder I ordered last year. Starting with the dry pressure test, it lost 3 PSI per minute starting at 15 PSI. According to FCP Euro, they had a manufacturing defect last year so I'm getting a replacement.

Check yours if you ordered one last year.

Usually Schwaben translates to sh1t but their brake bleeder is better than Motive's.

[Ximian]

Originally Posted by dparm

Enjoy your daily dose of rage.

I watched the VinWiki video, then read the comments, then the AER response. After watching the last part of the 50 minute video, my conclusion is that "everyone sucks here."

From http://americanenduranceracing.com/d...t-repsonse.pdf -

"And most notably is at time index 50:20, where the subject car and driver initiate a pass under FCY, passing emergency vehicles at over 99 mph."

Everyone else was doing at least 80 MPH when they passed the recovery vehicles. No idea what was going through his head passing anyone under a yellow, but I don't see his pass at that time being considerably worse than what everyone else was doing.

Section3.9.1,“When an incident occurs on track which requires the use of a flagger to display a standing yellow flag, cars shall reduce speed."

To what speed? 100 MPH to 95 MPH?

"Should a waving yellow flag be displayed, cars shall significantly reduce speed."

Again, to what speed? 100 MPH to 80 MPH?

I would say 60% of the blame is down to the race organizers for creating ambiguity in the rule and for not getting in contact with the team in a timely manner to inform them of the situation. If the officials could have talked to the team, who would then would talk to the driver, further unsafe maneuvers could have been prevented. Everyone sucks here.

[Ximian]

Originally Posted by dparm

I got one for Christmas. What's the test procedure?

Assemble it, tighten all of the connections, then hook it up to the brake fluid reservoir. Pump it up to 15 PSI and let it sit for a few minutes. The pressure shouldn't change for at least the time it would take you to do one corner but probably much longer.

I'm interested in only the time to complete one corner as I'm planning on doing dry bleeds. I don't want to deal with cleaning the inside of the pressure bleeder, the tubes, and create more waste from the whole process.

I did the dry test on my wife's car but I should test it on mine just to confirm it's the bleeder and not something wrong with her car.