Help Tuning the Subaru BRZ for B Class Track

Needing Assistance ASAP! This is frustrating! Whenever I tune my BRZ for track I cant seem to get the setup to feel as good as the ones I download and install. If some can share a great BRZ Tune with me I would appreciate it and finally figure out what I am doing wrong. I feel like I am needing to flutter the throttle of the car all the way threw a turn in order to hold a line without over / understeering. Braking in sloloms can whip my back end out to a drift = NO GOOD! I am confused on how to fix these issues. I need a solid Track tune that will assist me on my tuning skills and help me understand what I am doing wrong here. Share your Mods and Tune Specs to help me figure out what helps you when Tuning. Please inform me if I am overkilling on a certain area weather it be POWER or GRIP or Both.

I am Running a 1:01.000 on Lime Rock WEST CHICANE, not sure if that’s a decent time or not for my setup on my BRZ. It feels steady but I know I can get fasters in the corners.

Overall BRZ Power and Specs

HP: 294
TQ: 218
WEIGHT: 2,567 LBS
F DISTRIBUTION: 54%

My Subaru BRZ TUNE Setup as follows.

  • Optimal Tire Pressure 33-34 PSI when heated
  • Stock Gearing
  • Alignment - Camber -2.4F / -2.0R - Stock Toe - Caster 5.5
  • Anti-Roll Bars 26F / 21R
  • Springs - 780F / 680R - Ride Height 4.8
  • Rebound Stiffness 7.6F / 6.6R - Bump Stiffness 5.4F / 4.2R
  • Downforce 83F
  • Braking 55%F - Pressure 106%
  • Differential 15% Accel / 15% Decel

My Subaru BRZ Modifications for track racing.
(Whatever I do not list It is because I left it Stock)

  • Stock FA20 Motor (No swap)
  • Stock Drivetrain (RWD)
  • Centrifugal Super charger
  • Sport Tires (255F / 285R)
  • TC105N Rims (Stock 17’')
  • Forza Race Front Bumper
  • GReddy Sport Style Rear Wing
  • GReddy Style Hood
  • Sport Clutch
  • Sport Transmission
  • LS Differential
  • Race Brakes
  • Race Coil overs / Dampers
  • Race F/R Sway Bars
  • Sport Chassis Reinforcement
  • Sport Weight Reduction
  • Race Ignition
  • Race Exhaust
  • Street Intercooler
  • Street Flywheel
  • Sport Supercharger

I hope I can get some assistance, I need to understand how to better Tune my BRZ and cars alike.

My GT is: Wiseowl17

Thanks Guys!

OK, I took a try at this. I don’t usually do B-Class, so I’m a little out of my league here. I tried a few laps on Lime Rock West with your tune, then wiped it and tried my own, what I came up with in about 15 minutes is below:

Tire Pressure, haven’t touched yet
Gear Ratio, left it at 4.10
Alignment -1.5/-1.0 Camber, 0.0/0.0 Toe, 5.5 Caster
ARB’s 28/20
Springs 450/435, 4.9/4.9
Damping 8.0/7.2, 4.1/3.8
Aero, haven’t touched
Brake, haven’t touched
Differential 50%/25%

With this setup I’m sure it’ll run sub-1:00 if you get a good lap. I also use ABS, which holds me back a bit.

I want to say two of the things that may have been hurting you are 1) too stiff of a spring rate and 2) too low of a spring rate in the back compared to the front. At first glance, it would seem that having much softer springs in the rear would help your oversteer problem, but considering that you’ve got a ton of tire out back, that didn’t seem to be the problem.

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Try my BRZ Tune then let me know what you think.
If you like it I will PM you the setup!

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I actually like the way that your suspension is set up. It seems to be very solid! I ran a 1:01.300 consistently. I like how that feels though over my tune. Could I get the setup from you? Are you using the same parts I am?

Ive Pm’d you the set up. Enjoy!!

I do appreciate the help man. I was able to run about a half second faster with those suspension adjustments. I was running a tight suspension which was hindering my ability to hold a solid like in a corner. I did lower the Tire PSI down 1 PSI each and also raised the Camber back up a bit to 1.8F / 1.6R , I felt as if your tune had a bit too much under-steer so I lowered the F ASB 1.0 and that’s really about it. However I am only able to achieve a 1:01.400 on that same track. — No sub 1:00.00 unfortunately. I have been driving for a while too so I know I am experienced at driving hitting every corner with a Good or Perfect corner, so that’s not the issue.

Let me know the numbers you get on that same track. The BRZ handles a better (noticeably) through the corners but there are still adjustments to be made. Were you able to achieve sub 1:00.00? I am curious. I am just confused as hell how these guys on F6 can run a 2-3 second faster lap time than me. I want to know the parts and mods in order to get sub 1:00.00 on this track. (Lime West)

Thanks again.

I think I ran a 1:00.580 or something like that, I honestly didn’t spend a huge amount of time on it. I just know that there are people out there that can drive my own cars/tunes 2-3 seconds per lap quicker than I can myself, that’s how big of a skill gap is out there. If I ever figure out how to drive without ABS, that’ll drop my lap times, too.

I will have a look at this tomorrow, are you desperate for this build though it looks overweight and underpowered to me

Ok so I decided to have a quick look before I go to bed, tried a couple of build variations and managed to get one that goes under 1.00.000. I managed to get a 59.744 the car feels solid. Like I say ive only had a quick look its almost 5am and ive just been to work for twelve hours. The tune is called 59 lemme know wat you think

I’ll have a look at this tomorrow.

Heres one I was playing with today. ( I have 2 builds one with the cage, one without. ) the one I boarded is the one in this post. Im still not sure if the cage will be faster or not I suspect it will be but I need more time with it.

I ran a 58.528. #13 on the boards - replay available.

BUILD
Centrifugal Aspiration Conversion
Forza Aero Front/Rear
Race Tyre Compound
245 Front Tyre Width
275 Rear Tyre Width
Rota Tarmac 3 Rims
Race Differential
Street Driveline
Race Brakes
Race Springs
Race Rollbars Front/Rear
Race Weight Reduction
Street Intake
Race Exhaust

TUNE
everything will be front/rear and listed in the order of tuning options as you tab through. Stock gears.

28.5/28.5
-2.0/-1.5
0.0/0.0
6.0
19.62/19.0
490.3/360.3
5.2/5.2
9.8/9.6
1.6/1.5
100/160
53%/110%
80%/30%

Enjoy.

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tried out your tune, it is too good. Almost a lobby smasher lmao… thats really good work… I like the fact you can attack bumps and not be worry about them. it works well on a number of b class lobby tracks.

Thank you.

I ran Lime Rock Full and noticed some understeer I did not seem to notice the other day. The car is now #11 on west with a 58.417 and #31 on Lime Rock Full with a 54.675.

Please make the following changes.

Rear ARB: 24.0

Ride Height Front and Rear 5.5

Differential Acceleration 40%.

I cannot edit the original post whilst under moderation.

I’ll run Lime Rock west chicane with my setup tonight and I’ll let you know how it goes.

Is your gamer tag the same as your username? I want to try out your tuning.