Forza 4 FRS Tuning Discussion (GRIP)!

[BlaineWasHere]

I want this thread to be an open forum for tuning the FRS for open lobby racing in Forza 4. I'm by far no tuning master so I am hoping I can get some help!

Right now I have been playing around with some B500 builds and I can't get the balance I want between tire width and weight. Generally speaking I drive light handling cars over heavy power cars in the game but I've not been happy with what I have come up with for the FRS so far.

With the full race weight I wound up on 235F and 245R on race compound. At this weight I couldn't go square because that put me at 502PI. Adding in cage/stiffening is trick too because it increases PI a few but seems to drastically effect acceleration! With the tires fully maxed (275) I wound up at almost 2,600lbs.

SPRING RATES! I'm at a loss here. I have a NC Miata B500 build that I love to drive and I can't seem to replicate this with the FRS. Generally I've had good luck with a decently stiffer front spring that rear but on high speed/flat corners the ass end wants to turn soooo much faster. My car still wants to push in and be loose off.

So yeah I guess I'm looking for some of you Forza tuners out there to step up and help me make my FRS go faster!!!

[Allch Chcar]

I try to run a bit softer rear springs than the % weight distribution. Right now I'm running 750/670, which is 52.8% front bias, and it seems pretty neutral with the sport weight reduction. I turned the rear rebound and dampers way down, half a point each. Way too much oversteer stock for a grip setup.

@bneale found it's better to run wider tires for stability than stickier rubber. It's slower but more stable.

I try to keep it square for tires, same front to back width. I'm not a pro, this is some of the stuff I've picked up.:happy0180:

[BlaineWasHere]

I've been running similar spring rates, maybe a touch softer in the rear.

I find that the stock rebound/dampening is always very high on Forza so I've dropped those values a decent amount with a slightly softer rear end. I also have a stiffer front sway than rear, this by a decent margin actaully. Both settings here are again much softer than stock though. When you add the race sways it makes them VERY stiff.

I can get full 275 race comp on the car in B500, but it's just pretty heavy (which kills acceleration).

[BlaineWasHere]

So I ended up taking on the wider tires and added weight. The car is much more stable. Corner speeds are similar but I am getting on the throttle WAY WAY sooner which is good but straight line speeds did suffer.

I wound up with 6.5 for handling and Accel. I was also able to achieve this with 245s and race weight but it's not as stable.

This is DEF not going to be a leader board car, but I'm thankful for that.

[bimmerboy]

idk about anyone else but i love the car completely stock. Really fun to drive even if its a little slow. A good testament to how good the car is stock in real life IMO

[Asterisked Accolade]

I never make drift cars, i only focus on Grip. I've gotten very good at tuning my cars to retain grip and have good turn-in. But it'd be a long post it i checked and posted all my tuning numbers.

[CSSM]

Originally Posted by Allch Chcar

I try to run a bit softer rear springs than the % weight distribution. Right now I'm running 750/670, which is 52.8% front bias, and it seems pretty neutral with the sport weight reduction. I turned the rear rebound and dampers way down, half a point each. Way too much oversteer stock for a grip setup.

@bneale found it's better to run wider tires for stability than stickier rubber. It's slower but more stable.

I try to keep it square for tires, same front to back width. I'm not a pro, this is some of the stuff I've picked up.:happy0180:

And this is why your B class FR-S owned mine

I try to make my tunings realistic for a real life budget so mine suck haha

[Spaceywilly]

Just set a top 2% time with my c class frs on stock tires. It's all about light weight with this car.

[BlaineWasHere]

I went back and made another B build for R comp and lightness and wound up at 2295lbs

[BlaineWasHere]

btt

[FReSh]

I've spent a pretty good amount of time on my B500 FR-S in Forza. I'll post up the stats so you guys can try it out and let me know what ya think! This car is a bit more on the speed side compared to the builds you guys were talking about, but I think it is pretty stable and can be very fast in the corners if you have reasonable throttle control.

Parts:
Street Air Filter
Race Fuel System
Sport Ignition
Race Brakes
Race Springs and Dampers
Sport Weight Reduction
Street Tire Compound
245/40/17 Front Tires
245/40/17 Rear Tires
Dymag 9 spoke wheels

That should put the car at 2497 lbs with 245hp and 185 lb/ft torque at B500.

Set-up:

Tires: 34psi front, 33psi rear
Gearing: Stock (Unadjustable)
Alignment: -.08 Camber (F+R), 0 toe (F+R), 5.0 Caster
Anti-Roll: Stock (unadjustable)
Springs: 654 F, 554 R, 4.9" ride height F+R
Damping: 8.0 F 8.4 R (rebound), 7.9 F 5.6R (Bump)
Aero: Stock (Unadjustable)
Braking: 52% Front, 98% Pressure
Differential: Stock (Unadjustable)

I generally drive with ABS on, TCS off, STM off, and manual with clutch.

Let me know what you guys think about that set-up

[cfusionpm]

I'll have to use some tips for mine.... It can't seem to stop sliding its rear end around no matter what I do.

[FReSh]

Originally Posted by cfusionpm

I'll have to use some tips for mine.... It can't seem to stop sliding its rear end around no matter what I do.

Soften the rear springs.

[cfusionpm]

Originally Posted by FReSh

Soften the rear springs.

I copied your design step for step on the suspension (because I know nothing about suspension setups) and it gives me a good base to work off of. The last two Forza games I played I started with FWD or AWD until I got something like a Ferrari F430 or 458, and those were good to go without much more than a sway bar and slightly tweaked LSD. This has a much more balanced feel than stock for the FRS, but I cranked the brakes way up because I'm a really aggressive late braker when starting at the back of the pack. Thanks for the help!