I make my tyre pressure between 31-32 psi with the front tyres slightly higher than rear on grip tunes for Forza 6 and Horizon3, but what tyre pressure would you use when hot for rally tunes? I’ve heard you want want them softer for more surface area (Top Gear), but how much softer?
Ive been going around the 22 24 mark but that was based on the stock prrssures of the audi quattro group b car,lower pressure seems to help stabilise the suspension i havnt worked it out yet as too low makes for a terrible car on the drive to event
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22-24psi hot?
For me I have a couple of different settings
Rally - Cold 29 front 28.5 Rear
Offroad Cold 28.5 front 27 Rear
Extreme Offroad Cold 23.5 Front 22 Rear ( dependent on rim size)
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Thanks! So rally is similar to grip, what psi when hot do you aim for for these?
I don’t work with hot temp’s to be honest, as they are inconsistent, set them when cold. drive 3 laps, and then review.
If the races you want to use the car in are offroad and not around 5 minutes or more then you will be running mainly on cold/medium tyres anyway.
In specs for tire pressure don’t think about hot or cold think about density. As the tire warms up the pressure will rise - density affects volume. Surface contact is affected by volume shape and over inflating a tire puts more work into the shock absorbers and camber. A soft tire will have more grip but too soft it will become very hot quickly and this is o.k. if you intend to use the setup for drifting. Whilst high pressure tends to make the grip less but also more responsive depending on the camber angle. If camber is set high for cornering the car can be less stable in a straight line. To offset his you can reduce the normal tire pressure to allow more contact with the surface but going to low will just make the tire roll out and destabilize cornering. To offset this set the roll bars to 1/3 or a little less than half way for both front and back with a little more stiffness in the front end. This allows to body of the car to roll out giving more contact to out cambered tires in cornering. But there are limitations on grip when surfaces are varied both hot, cold, wet, dirt, sand and testing out different processes on one car will definitely teach you something about tire pressure. I suggest you think about how the car feels when its driven - how it responds to different situations and when making adjustments - you need to do things in a pattern so you can track what works and why it works because there’s a stack of rubbish tunes out there on the community game site that can be pretty much useless.