Basic tuning

Community Hub Community Content Tuning
,
1

I’ve been doing a lot of reading about tuning in the last couple of days but there’s one thing that I can’t seem to find
And that is what tubers are searching for as far as basic tunes
I’m thinking its time to start tuning properly and can do a reasonable job but wanting to step it up
Just wondering were the good guys start I usually use things like anti roll bars and aero as fine tuning
But wondering about other things
Obviously I’m asking for a starting point as the end tune goes by feel but what do people recommend as a starting point
Springs are set as low as possible and the springs set so it doesn’t bottom put
But what do people use to set up camber? I was doing it so that on long turns the tire was as close to possible to virtual but this doesn’t seem right as others adjust to tire temp

2

You might consider some of the posts in the following thread as potential starting points. There are also many of such threads on the FM5 tuner’s section that might be applicable to what you are looking for.

http://forums.forza.net/turn10_postst42666_Flash-tunes.aspx

.

3

  1. Start with a cold tire pressures that will give you 32~33 psi front/rear. For light car, 31~32 is ok. For heavier car 32~33. This seem to be universal across all cars and tires.

  2. Adequate rate to support the car for stable handling. Soft may give marginally higher grip and time to react but could feel sloppy if too low. Stiff on the other hand gives fast response but could feel harsh and ‘jumpy’ if too high. Front/rear balance is desired for cornering stability (especially bumpy ones such as Sebring). Usually lower than the default. As you mentioned, the car should not bottom out.

  3. Use dampers to control transitional responses (braking, quick acceleration, corner in/out. Similar responses as spring rates. Soft = supple but slow to respond, High = responsive but harsh.

  4. Then diff to control power on/off characteristics (important as this could skew feedback to correct #1 & #2 above)

  5. Then ARB to SUPPLEMENT the springs in cornering and gain better BALANCE. For front engine cars, the front is naturally heavier therefore higher front spring is necessary. FR car, however, requires more grip in the rear coming out of the corners. But low rear weight limits the load on the rear. Therefore ARB can be used to 1. stabilize cornering roll + 2. shift more weight toward the ‘driven’ wheel. So front high + rear low ARB set will shift more load to the rear in mid corner to improve rear traction. Heavier the car, more overall ARB is needed. If overall ARB is too high, the car feels skittish in mid corner. Sebring is a good place to test for this. If overall ARB is too low then the car will feel sluggish.

  6. Now the Camber. The wheels with power should be flat as possible for maximum acceleration. For RWD, I typically use -0.5 to -1.0 or so for non race cars. Keep camber low for FWD as well then you can use Caster to increase camber only in mid-corners and slow corners where additional camber is beneficial. More +ve caster = more ADDED camber as steering angle is increased. Something like -1.3 camber going straight could become -1.8 in mid corner with Caster. Low camber has the benefit of high grip during straight line braking and acceleration. I check the temperature just as a sanity check but don’t use it as THE deciding factor. If there are front/rear temperature difference, it may be easier to balance it using tire widths instead of using tire pressure or camber. In long corners, you would still want a little camber thrust therefore your target should be slightly -ve even in mid corner (-0.3 ~ -1.0).

That said, actual real life theory does not always apply to Forza universe, i.e. real life adjustments ONLY work if they are actually CODED into Forza. We have no CLEAR evidence that any of the above work 100%; they are my subjective evaluations based reasonably on real life tuning concept/theory (which I have absolutely no actual experience on).

Good luck!

4

Thanks grd that’s what I was after. Il have a few drinks and a play tonight

5

Goal in adjusting the Camber is to maximize cornering grip by having the tire close to 0-degree camber during hard cornering. Can be seen in replay telemetry.