Track forum general chit chat

[jmg]

Originally Posted by RugbyBro

NP! You’re probably going to be blazing the trail with xDrive fitments, not sure anyone knows how forgiving the AWD system / transfer case is to aftermarket sizing options. I would imagine tho that BMW would have to have a straightforward solution given the track allure of an M3

Tire and wheel combos will have to match rolling diameter very closely. No more settling for 35 aspects when I need 30's. It should be easier to run square.

[SYT_Shadow]

Originally Posted by jmg

Tire and wheel combos will have to match rolling diameter very closely. No more settling for 35 aspects when I need 30's. It should be easier to run square.

this is my thought as well, we just run square always and problem solved

[joshuasok]

Hey everyone, totally random, but I just bought an F80 and have plans on heavily tracking it. 12-15 events a year- all open lapping days.

The previous owner gave me downpipes and a BM3 license.
I honestly think the car has enough power however I would like to add the downpipes to increase the exhaust noise ( yes im a child) .

Would having the OEM CS engine tune + DP + CEL delete via the BM3 software bring any negative effects to the engine reliability?

Thanks in advance!

[SYT_Shadow]

Originally Posted by joshuasok

Hey everyone, totally random, but I just bought an F80 and have plans on heavily tracking it. 12-15 events a year- all open lapping days.

The previous owner gave me downpipes and a BM3 license.
I honestly think the car has enough power however I would like to add the downpipes to increase the exhaust noise ( yes im a child) .

Would having the OEM CS engine tune + DP + CEL delete via the BM3 software bring any negative effects to the engine reliability?

Thanks in advance!

I think you'd have zero reliability issues. You could also use a stage 2 tune with limited torque with great results

I would not do a stg2 without limiting torque without a crank hub fix

[D_SheerDrivingPleasure]

Anyone know when Bridgestone will release the RE‐71 RS here in North America? From what I can tell it's currently available in asian markets in all the right sizes.

[MaX PL]

Anyone know of any nice/functional GT4 style front splitters? Would like something that extends out a bit compared to most of the offerings out there only available for cosmetic improvement.

Really like this one but it requires about 10 bolts through the bumper cover.
Very functional splitter with brake duct ports and skid plates. Would be a great buy if not for for the way its mounted
https://www.apmotorsport.co.uk/produ...ter-carbon-rep

I also found a this option but very few details and likely not shipped to the USA.
https://360carbon.de/en/shop/bmw-m-c...-frontspoiler/

If I can't find a good GT4 style solution then I may go with this GTS style with the lower splitter option. I had one of these without the lower splitter for 2 years before it was damaged; a replica from ModeCarbon that is, not this RKP. I think the option with the lower splitter is a good solution as I'd be able to extend the lower splitter further out, and the plastic splitter protects the carbon from damage.
This is not as functional as the GT4 style option, but may be the only choice available for me. It's very similar to the Team Schirmer splitter, but that is entirely carbon and possibly only one piece unlike this solution.
https://ind-distribution.com/collect...pper-front-lip

[SYT_Shadow]

Slon Workshop makes one, that's what I'd use

[sly1types]

Originally Posted by MaX PL

Anyone know of any nice/functional GT4 style front splitters? Would like something that extends out a bit compared to most of the offerings out there only available for cosmetic improvement.

Really like this one but it requires about 10 bolts through the bumper cover.
Very functional splitter with brake duct ports and skid plates. Would be a great buy if not for for the way its mounted
https://www.apmotorsport.co.uk/produ...ter-carbon-rep

I also found a this option but very few details and likely not shipped to the USA.
https://360carbon.de/en/shop/bmw-m-c...-frontspoiler/

If I can't find a good GT4 style solution then I may go with this GTS style with the lower splitter option. I had one of these without the lower splitter for 2 years before it was damaged; a replica from ModeCarbon that is, not this RKP. I think the option with the lower splitter is a good solution as I'd be able to extend the lower splitter further out, and the plastic splitter protects the carbon from damage.
This is not as functional as the GT4 style option, but may be the only choice available for me. It's very similar to the Team Schirmer splitter, but that is entirely carbon and possibly only one piece unlike this solution.
https://ind-distribution.com/collect...pper-front-lip

I have this one https://www.raceparts.biz/gt4-f8-m3-...bon-fibre.html

It has functional ducts, and nice quality and fit. I have bunch of pics in my Instagram, link in my signature. They ship to the states and even had it in stock.

[Suds]

Damn that looks Hot!
Now I need one for my M2.

Found it.

https://www.raceparts.biz/mk-motorsp...ake-ducts.html

Originally Posted by sly1types

I have this one https://www.raceparts.biz/gt4-f8-m3-...bon-fibre.html

It has functional ducts, and nice quality and fit. I have bunch of pics in my Instagram, link in my signature. They ship to the states and even had it in stock.

[RugbyBro]

Originally Posted by D_SheerDrivingPleasure

Anyone know when Bridgestone will release the RE‐71 RS here in North America? From what I can tell it's currently available in asian markets in all the right sizes.

I hope soon... I was really looking forward to trying out the regular 71s last year but end of production + tire shortages made them not an option for me.

[EGbeater]

Originally Posted by D_SheerDrivingPleasure

Anyone know when Bridgestone will release the RE‐71 RS here in North America? From what I can tell it's currently available in asian markets in all the right sizes.

Originally Posted by RugbyBro

I hope soon... I was really looking forward to trying out the regular 71s last year but end of production + tire shortages made them not an option for me.

I can't find solid information on the performance of the RE71RS vs the old RE71R compound/design (Bridgestone claims it's faster, but... what tire manufacturer doesn't claim the new iteration isn't better?) but a JDM test/first impressions video has the RE71RS at 1 second faster than the Dunlop Direzza ZIII. We all know the ZIII is not near the pointy end of the 200TW "street" tire pool, for autocross or for track duty, but a full second advantage is significant on sub-40-second lap times... ???

I'm referring to the second video out of 7 in this post... that's the only one I watched: http://www.zerotohundred.com/forums/...ost-1064740812

[MaX PL]

Originally Posted by SYT_Shadow

Slon Workshop makes one, that's what I'd use

Thanks. Reached out to them today. Pricey... somewhat close to the cost of the OEM one.
They also use the 9 bolts to the bumper cover, but apparently that's not 100% necessary as its direct mounted to the bumper.
I have to do some measurements after my suspension is done as it would sit low for street use.

Originally Posted by sly1types

I have this one https://www.raceparts.biz/gt4-f8-m3-...bon-fibre.html

It has functional ducts, and nice quality and fit. I have bunch of pics in my Instagram, link in my signature. They ship to the states and even had it in stock.

Thanks as well. How is this splitter mounted? Is it to the bumper cover from underneath?

My one worry with either of these, especially the costlier one, is street use and potential damage. The Slon one has the skid plates at least.
The nice thing about the GTS option I posted earlier is that it'd just be $500 to replace the plastic lower splitter with the upper carbon hopefully protected. If I hit either of these that's not the case.

I said I'd never buy a splitter again after damaging my first one, but the car needs some cosmetic improvement so why not include some function as well in the process.

[biofluke]

Originally Posted by sly1types

I have this one https://www.raceparts.biz/gt4-f8-m3-...bon-fibre.html

It has functional ducts, and nice quality and fit. I have bunch of pics in my Instagram, link in my signature. They ship to the states and even had it in stock.

Nice looking splitter and the price isn't too bad. Mind if I ask how it was attached to the front bumper? Did it use similar mounting points as the M-performance lip or did it require drilling? Any pics of the installation process or with it unmounted?

I like the GT4 and GT4 replicas but they look just a touch too aggressive for the occasional street driving I do and I could see myself going nuts scraping it. This option you show here isn't quite as low as the GT4 replicas but has the functional vents.

Also nice Wagner top mount. I've been playing with the idea of upgrading the cooling on my car, and have narrowed it down to the Wagner or the Mishimoto. The bimmerworld one I'm sure is the best but is just more than I'd like to pay for that sort of thing.

Did you notice any benefit on track with maintaining power when heat soaked? With my track tune, I noticed that a lot of timing gets pulled after the car heats up mid-session, and it feels much less powerful, especially on a hot day.

[NYG]

Does the CS have anything different in regards to cooling? I don't remember ever noticing any significant heatsoak. Even on 100 degree days at Thunderbolt or Limerock.

[SYT_Shadow]

Originally Posted by NYG

Does the CS have anything different in regards to cooling? I don't remember ever noticing any significant heatsoak. Even on 100 degree days at Thunderbolt or Limerock.

It has the nice hood which makes some kind of difference due to the extra vent. Also, it has ~431whp.

No one complaining about cooling in the F8X platform is running 431whp... more than 500whp.

[NYG]

Originally Posted by SYT_Shadow

It has the nice hood which makes some kind of difference due to the extra vent. Also, it has ~431whp.

No one complaining about cooling in the F8X platform is running 431whp... more than 500whp.

I wish all of my car's engines were cooled as well as my CS was.

[SYT_Shadow]

Originally Posted by NYG

I wish all of my car's engines were cooled as well as my CS was.

Absolutely!

I am pretty sure the conclusion is if you want ~500whp power levels you need larger turbos so you don't spin them as fast. Or E85/etc.

The CS always felt powerful enough to me completely stock!

[jmg]

Originally Posted by NYG

I wish all of my car's engines were cooled as well as my CS was.

The CS cooling is almost cartoonishly good. I still remember a 109 degree day at Streets Of Willow, running lap after lap with little to no heat soak.

[CanAutM3]

Originally Posted by NYG

Does the CS have anything different in regards to cooling? I don't remember ever noticing any significant heatsoak. Even on 100 degree days at Thunderbolt or Limerock.

The only different element I see is the hood vent, that both improves downforce and cooling flow through the radiators.

[adc]

I’m running 500whp without the fancy hood and no heat soak.

True it’s hard to quantify without data logging, but the car is hitting the same crazy speeds on the straights, lap after lap. Also I’ve stopped opening the hood in between sessions because the intercooler seems to be at ambient or below.

Perhaps it’s the manual transmission vs DCT, cannot think of anything else that might make a difference.

[SYT_Shadow]

Originally Posted by adc

I’m running 500whp without the fancy hood and no heat soak.

True it’s hard to quantify without data logging, but the car is hitting the same crazy speeds on the straights, lap after lap. Also I’ve stopped opening the hood in between sessions because the intercooler seems to be at ambient or below.

Perhaps it’s the manual transmission vs DCT, cannot think of anything else that might make a difference.

One point is your 6MT, that gives the engine some extra breathing room. You can see it in any AIM plot where you compare DCT vs 6MT.

The other is you are using a torque limited Stg1 right? That's far from a 'custom' tune with a crapton of power.

Have you dyno'd your car?

[adc]

Originally Posted by SYT_Shadow

One point is your 6MT, that gives the engine some extra breathing room. You can see it in any AIM plot where you compare DCT vs 6MT.

The other is you are using a torque limited Stg1 right? That's far from a 'custom' tune with a crapton of power.

Have you dyno'd your car?

Yes to tq limiter in 1st and 2nd, but these aren't used much if at all on track. And I haven't dyno'd the car, I should probably do it and see what I have in reality.