Modded car makes grinding noises at a standstill

tvrner · May 29, 2020

Hi, hopefully this isn't faq, I tried searching and couldn't find anything.

I made my first modded car by combining the physics from the kunos MkI Escort with the kn5 files from the Alfa GTA.

The car mostly works great... looks and sounds like the alfa but handles like the Escort.

However, I get grinding noises anytime I pull onto a shoulder (in the LA mod track for example). It will grind and rattle sort of unpredictably while I'm sitting there idling with no input. Wheels straight ahead, neutral, although that doesn't seem to matter.

I've just been assuming it's ground clearance, but I don't see why the KS GTA doesn't do it. I also dont understand what triggers it at a full stop.

I used the collider.kn5 from the alfa, and also the colliders.ini to set the ground collider. I used the suspension, tires, aero, setup, etc from the Escort.

tvrner · May 29, 2020

I can upload the car if that helps (and is permitted here)

Gevatter · May 29, 2020

tvrner said:
and is permitted here

It isn't.

tvrner · May 29, 2020

Ok, so if that's not allowed, whats the best way to get help with this? Is there a posting faq I'm missing?

Gevatter · May 29, 2020

Well, starting this thread was the best way. You described what you did and what happens, so that's a good start. The more detail you can provide from your own troubleshooting, the more likely is somebody can help. Maybe you can upload a video to show what happens exactly and how it sounds. If somebody offers their help you can of course always send them the car or a link to it privately, you just can't upload/link Kunos stuff here publicly.

tvrner said:
Is there a posting faq I'm missing?

If by that you mean what can and cannot be posted/uploaded, that's in the board rules.

Board Rules

www.racedepartment.com

tvrner · May 29, 2020

Thats what I was looking for thanks...

tvrner · May 29, 2020

Here is a video of the grinding/rattling I"m hearing. Sounds a bit like I have someone in the trunk trying to get out everytime I come to a stop.

Nicecuppatea · May 30, 2020

Sounds a lot like the live axle suspension jumping about, it can get a bit wild if it's not happy with its position. Maybe try putting the original GTA suspension.ini back, see if that fixes it?

tvrner · Jun 1, 2020

Ok just tried this. Unfortunately I can't get the game to load with this new version of the car in my content folder... it just crashes.

What does the suspension interact with, the collider? I used the Escort suspension file, but the GTA collider (so it would match the body). Do I need to be using the Escort collider instead?

Nicecuppatea · Jun 1, 2020

Don't think the suspension affects the collider, it could be the ride height is being set to a negative value or the ground collider is way off, could be a lot of things.

It's generally much easier just to edit a cars existing physics rather than swap one cars for another: if you want more power edit the power.lut or for more or less grip swap the tyres with Content Manager. If you make one change and get a problem then you know it has to be due to that change rather than all kinds of things when you completely change the physics files.