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      01-23-2018, 12:28 PM   #67
bbnks2
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Quote:
Originally Posted by TurboDoseBro View Post
Hey what about Milkywave for Laguna Seca?

The driver would be much faster if they didn't turn in early every corner and then chop at the wheel... Looks like the result of learning to drive the car oriented around a setup that under-steers.
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      01-29-2018, 09:51 PM   #68
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Was at Buttonwillow Raceway Park this past weekend, and had an awesome day. Met fellow 1Addict berns and got to check out his rad 1er. Also joined the sub-2 club, running a 1:59.354.

Since the last event, I added M3 front control arms, and put on some brand new Nexen SUR4 tires. With a fresh alignment, new tires and cool weather, it was the perfect time for a personal best.

Session 1: 2:02.4
Session 2: 2:01.3
Session 3: 1:59.9
Session 4: 1:59.3

My goal for this car has always been to go sub-2 on 200 TW street tires with no aero. Glad to have met the goal.

That said, still fighting a lot of understeer, even back on the OEM 135i front sway bar. The first session was on the M3 OEM front bar, and the handling balance was awful. Terrible understeer unless I chucked the car into the corners and made it sit on the rear tires in a mild drift.
There are many areas of the track where I am faster with no front bar at all, because there is zero understeer. However, there are just as many areas where I lose time because I had constant oversteer/inability to put the power down. No amount of tire pressure changes and shock tuning seemed to affect the handling balance one way or the other.

At my next event, I am going to try unhooking both the front and rear sway bars and see if the car feels better. I am reluctant to put an even bigger rear bar on the car, at the expense of the limited traction I have now. The 15mm 335xi bar should be enough rear bar. Just need to sort out the front end.

That said, playing with the rebound on the TCK shocks was enlightening, the car felt better, and was faster the quicker the rebound was. Had the front and rear maxed out by the end, and was going faster as a result. However, there are several areas of the track, where, irrespective of shock settings, the car was getting unsettled/bounding really hard/critically under-damped. I may be reaching the effective limits of the TCK shocks.

This further proves my theory that "entry-level" pimp shocks aren't worth the cash, and that garbage eBay coils can go just as fast, as long as they are really stiff...

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Streets of Willow: 1:27.7 CW 11/15/15; 1:29.5 CCW 8/15/15 |||| Autoclub Speedway ROVAL (CCW): 1.52.6 - 12/2/17
Willow Springs - Big Willow (CW): 1:35.8 - 3/31/18 |||| Buttonwillow #13 (CW): 1:59.3 1/27/18
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Last edited by Ginger_Extract; 01-29-2018 at 10:00 PM..
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      01-30-2018, 12:03 AM   #69
berns
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Quote:
Originally Posted by Ginger_Extract View Post
Was at Buttonwillow Raceway Park this past weekend, and had an awesome day. Met fellow 1Addict berns and got to check out his rad 1er. Also joined the sub-2 club, running a 1:59.354.

Since the last event, I added M3 front control arms, and put on some brand new Nexen SUR4 tires. With a fresh alignment, new tires and cool weather, it was the perfect time for a personal best.

Session 1: 2:02.4
Session 2: 2:01.3
Session 3: 1:59.9
Session 4: 1:59.3

My goal for this car has always been to go sub-2 on 200 TW street tires with no aero. Glad to have met the goal.

That said, still fighting a lot of understeer, even back on the OEM 135i front sway bar. The first session was on the M3 OEM front bar, and the handling balance was awful. Terrible understeer unless I chucked the car into the corners and made it sit on the rear tires in a mild drift.
There are many areas of the track where I am faster with no front bar at all, because there is zero understeer. However, there are just as many areas where I lose time because I had constant oversteer/inability to put the power down. No amount of tire pressure changes and shock tuning seemed to affect the handling balance one way or the other.

At my next event, I am going to try unhooking both the front and rear sway bars and see if the car feels better. I am reluctant to put an even bigger rear bar on the car, at the expense of the limited traction I have now. The 15mm 335xi bar should be enough rear bar. Just need to sort out the front end.

That said, playing with the rebound on the TCK shocks was enlightening, the car felt better, and was faster the quicker the rebound was. Had the front and rear maxed out by the end, and was going faster as a result. However, there are several areas of the track, where, irrespective of shock settings, the car was getting unsettled/bounding really hard/critically under-damped. I may be reaching the effective limits of the TCK shocks.

This further proves my theory that "entry-level" pimp shocks aren't worth the cash, and that garbage eBay coils can go just as fast, as long as they are really stiff...

Stoked to have met you and hung out a bit! Congrats on your time, you deserve that PB after telling me about your ongoing quest at BW!

Re: Sway bars... it's a tough little car to get sorted. I looked back at my in-car from my 2:00.3 and the car pushed a bunch, but it was super easy to get on power out of turns with the stock rear bar and LSD. My only change this time was the rear bar, and probably tired tires and a slightly screwed up alignment since I didn't get it realigned after dropping the rear subframe. My understeer was SO improved. Turn-in response and traction was really amazing. Felt like a new car. But rear grip was totally gone. I had to be so delicate with the throttle out of every turn. I'll admit, I didn't play with my damper settings one bit and probably should have. I really want to go to a test day to play around and see what changes do what and feel best. Between this and the traffic in my shitty run group, my chance of running sub-2 was non-existent.

What spring rates are you running? Sounds like you could use more spring.
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      01-30-2018, 01:54 PM   #70
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Quote:
Originally Posted by berns View Post

What spring rates are you running? Sounds like you could use more spring.
336 lb-in F, 700 lb-in R. Had 400/700 initially, the front end felt way too harsh relative to the rear of the car.
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Streets of Willow: 1:27.7 CW 11/15/15; 1:29.5 CCW 8/15/15 |||| Autoclub Speedway ROVAL (CCW): 1.52.6 - 12/2/17
Willow Springs - Big Willow (CW): 1:35.8 - 3/31/18 |||| Buttonwillow #13 (CW): 1:59.3 1/27/18
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      03-06-2018, 08:19 PM   #71
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1:38.9 palm beach international raceway.
Michelin pilot super sports
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      03-19-2018, 10:02 AM   #72
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Driver Name: SCato
Track: Atlanta Motorsports Park
Configuration: Standard
Lap Time: 1:40.700
Tires: 255/35/18f and 265/35/18r : Nitto NT555


First HPDE of the year was yesterday, previous best from December @ AMP was 1:42.07

Last edited by SCato; 03-19-2018 at 10:41 AM..
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      03-23-2018, 01:39 PM   #73
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2008 BMW 135i  [5.00]
First Time Attack of the season Here at Driveway Austin

Username of car owner: Thewind727
Driver Name: Dustin Williams
Trackriveway Austin
Configuration: L1
Lap Time: 35.99
Tires: Bridgestone RE71R 245-40 front 275-35 rear

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08 135i AT / xHP stage 3 trans flash / vrsf 7.5 hd FMIC/ docrace single 6266 dbb precision turbo kit / TCKline s/a coilovers / RB external pcv kit / Active Autowerke ChargePipe / Wavtrac lsd / Whiteline subframe and Diff Full bushings / WedgeTuning full e85 custom tune 26psi / Blackmarketparts Port Injection Kit
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      03-27-2018, 07:08 AM   #74
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Driver Name: Randy Sams (Bionicbelly)
Car: 128i, no engine mods.
Track: National Corvette Museum
Configuration: Standard
Lap Time: 2:29.859
Tires: 225/45-17 Hoosier R7 F&R

Also ran a 2:51.805 in pouring rain on all-seasons. and it was Glorious.

Last edited by bionicbelly; 03-27-2018 at 07:13 AM..
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      04-13-2018, 11:09 PM   #75
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Does nobody drive Big Willow?
Hit it for my first time today. SO FUN.

Driver name: Alex Bernstein (berns)
Track: Big Willow @ Willow Springs
Time: 1:34.416 (with a passenger!)
Tires: Falken RT615k+ 265 front, 275 rear


Last edited by berns; 04-16-2018 at 01:42 PM..
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      04-16-2018, 09:26 AM   #76
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Driver Name: Andrew Morris (BimmerAg)
Track: Harris Hill Raceway
Time: 1:35.949
Tires: Federal 595 RS-RR 255/40R17
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      04-24-2018, 12:43 PM   #77
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Driver Name: Randy Sams (Bionicbelly)
Car: 128i, no engine mods.
Track: Mid-Ohio
Configuration: Pro Course
Lap Time: 1:39.701
Tires: 225/45-17 Hoosier R7 F&R

Configuration: Club Course
Lap Time: 1:42.549
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      05-29-2018, 07:49 AM   #78
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Driver Name: Randy Sams (Bionicbelly)
Car: 128i, no engine mods.
Track: Iowa Speedway
Configuration: Road Course
Lap Time: 54.2xx
Tires: 225/45-17 Hoosier R7 F&R

Driver Name: Randy Sams (Bionicbelly)
Car: 128i, no engine mods.
Track: Heartland Park Topeka
Configuration: Grand Prix Full (slow 8)
Lap Time: 1:56.7xx
Tires: 225/45-17 Hoosier R7 F&R
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      06-06-2018, 10:10 AM   #79
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Car: N55 135i MHD Stage 2+ shelf tune
Track: Palmer Motorsports
Configuration: CC
Lap Time: 1:52.730
Tires: 255/40-17 Hankook Z221 (C31) & 275/40/17 hankook Z214 (C51)
Brakes: Stoptech sport front and M3 OE brakes Rear
Suspension: 6k/16k OE front sway & E92 M3 rear sway
Weather: 58F and overcast/rainy
Video:


Spent the first ~5-10min just trying to get heat into these hard compound tires (C31 compound is meant for 90f+). They never really picked up more than 2psi pressure or heat across the entire 20min session. Final lap was by far the best grip and it showed on the clock. I am confident I can drop another 3-4s off this time on a sunny 70F day. I also made a ton of changes to the car this past winter and really had to re-learn my driving style.

Lots of heavy trail-braking in this video to keep the car stable. Tossing the car too hard into corners seems to be bottoming out the rear suspension and upsetting the car but with the trail-braking it was extremely well planted even with low tire grip. I need to shorten my rear strut length to increase bump travel, but I am not so sure the car will react well to having less droop travel. Teh E92 M3 bar seems to be picking up the inside wheel more than before.

Overall, I felt way more in control of the car in that my INPUTS were dictating the cars behavior and balance. In the past, I was kind of just tossing the car into corners and POWERING through them with the throttle (lots of tire wear and slow on the clock). With this setup, I can't really apply throttle until I begin unwinding the wheel (of course maintenance throttle is used).

Not too many other videos of 135i's running Palmer it's an amazing track! I've seen the fully fitted SEMA RAZE/Revosport 1M run it in around ~1:48 (I need some 305 wide tires too lol). Here is also a vid of another 135i doing it in 1:52.79. Not sure if either of them are on the forums:


Some more awesome video on this track of an M2 and a 1M running it in around ~1:53 (starts around the 15 minute mark):
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135i: E30 map by TwistedTuning, VRSF DP, Kerscher +15mm fenders, Kosei K8R 255/40/17, M3 control arms, UUC trans mounts, DV+, Whiteline RSFB, 5" intercooler, Charge Pipe, PC925 (23lb), UUC SSK, YCW Coilovers 6k/16k, Monroe shock mounts, Diff lockdown, Catch Can, N20 TMAP, 335is clutch, SMFW, 034 engine mounts, M3 Steering rack

Last edited by bbnks2; 06-07-2018 at 12:49 PM..
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      06-06-2018, 10:29 AM   #80
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That looks like an amazing track! Never heard of it before, but damn, it looks good.
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      06-06-2018, 10:39 AM   #81
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Quote:
Originally Posted by bionicbelly View Post
That looks like an amazing track! Never heard of it before, but damn, it looks good.
It's literally carved out of a mountain. Track nights in america (SCCA) has another event here on June 28th that I hope to be able to crack 1:50 at, weather permitting!

I'll try to render the video tonight.
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135i: E30 map by TwistedTuning, VRSF DP, Kerscher +15mm fenders, Kosei K8R 255/40/17, M3 control arms, UUC trans mounts, DV+, Whiteline RSFB, 5" intercooler, Charge Pipe, PC925 (23lb), UUC SSK, YCW Coilovers 6k/16k, Monroe shock mounts, Diff lockdown, Catch Can, N20 TMAP, 335is clutch, SMFW, 034 engine mounts, M3 Steering rack

Last edited by bbnks2; 06-06-2018 at 10:49 AM..
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      06-09-2018, 09:48 AM   #82
berns
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No vids from last weekend but I have a 1:34 flat from Big Willow and a 1:26.683 at Streets in 107* heat on BFG Rival S, 245/40 front, 275/35 rear.
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      06-13-2018, 09:35 PM   #83
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2011 BMW 135i  [0.00]
Car: N55 135i MHD Stage 2
Brakes: Stoptech Trophy Front and Rear SR34/SR33
Suspension: 600/900 Ast 4100/5100, RD Sport Swaybar F&R


Watkins Glen 2:09.51 Hankook Z214 C51
Summit Point Main 1:24.70 Hankook Z214 C51
NJMP Thunderbolt w/ chicane 1:39.09 Nitto Nt01
NJMP Lightning 1:21.62 Huge boost leak (running 3-5 psi) Nitto Nt01
Mont Tremblant 1:58.59 Nitto Nt01
Palmer Motorsports Park 1:55.08 Nitto Nt01
Thompson Speedway 1:26.32 Nitto Nt01
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      06-14-2018, 09:56 AM   #84
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Car: 2013 135i MSport
Brakes: Hawk HP+ Pads
Mods: Dinan camber plates; Wagner Evo 1 Intercooler; Custom Oil Cooler
Wheels: Apex EC-7 18x8.5 with 245 Hankook Ventus RS-4 (Front), 18x9.5 with 255 Hankook Ventus RS-4 (Rear); 3mm Spacer Front

Nat'l Corvette Museum West Course: 1:41.57
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      06-14-2018, 10:14 AM   #85
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Car: N52 128i AA headers axle back tune shelf tune
Track: Mid Ohio
Lap Time: 1:50.27
Tires: 245/35-18 Kumho PS91 on 8.5 apex wheels square
Brakes: f30 340mm
Suspension: B8 swift
Weather: 80F and overcast
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Last edited by gixracer; 07-03-2018 at 10:06 AM..
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      06-24-2018, 11:58 PM   #86
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Sonoma -- 1:55
Old heat cycled RE71Rs (265/275)
Stage 2 (350whp)

Car's got several seconds (1:52 easy) in it as I only got 3 sessions in before a water pump issue caused limp mode =/ those cement walls are also scary.
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      06-26-2018, 04:16 PM   #87
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New personal best at Driveway Austin this weekend!

Username of car owner: BimmerAg
Driver Name: Andrew Morris
Track: Driveway Austin
Configuration: L1
Lap Time: 0:37.733
Tires: 255/40R17 Federal 595 RS-RR

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Last edited by BimmerAg; 06-26-2018 at 04:22 PM..
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      06-28-2018, 12:25 AM   #88
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Quote:
Originally Posted by bbnks2 View Post
Some more awesome video on this track of an M2 and a 1M running it in around ~1:53 (starts around the 15 minute mark):
Hey, that's me!

Was a really fun session just playing around with the 1M, whose owner I know very well. It's a beautiful, extensively modified and known car amongst the 1M owner scene. Also, it's currently for sale in CT, pm me if you're interested.

Palmer is probably my favorite track from the ones I generally run. With it's technical nature, it's perfect for a short wheelbased car, although it doesn't leave much room for error. I was running sub 1:50s the previous day in my M2 when it wasn't drizzling and the sun was out - I think the vid is out there on YT. I used to run ~1:53s on a good day with my stock 135i running on Dunlop Star Specs. Hope to break sub 1:46 when I return this year with some proper track rubber.
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