MR cars

  • Thread starter Thread starter HoneyBadger
  • 18 comments
  • 1,281 views
H

HoneyBadger

Messages
211
United States
Va
I purchased an NSX-R, heavily tuned it, and upon driving it found it mostly uncontrollable. As soon the back end starts to come around just a bit it tends to be very difficult to recover unlike with an FR car. Found the same thing with the McLaren F1. I'd like to know if others have experienced this issue and if so what adjustments have been made to increase stability.
 
Odd. Generally MR cars are balanced well. Hence most racing cars being that configuration.

Don't know.
 
I switched my Enzo to it's stock tune while I was racing online and the rear end was all over the place no matter how fast I was going, switched it back to the tune I had before and it was fine. Just gotta tune it so it handles better.
 
You could try putting grippy tyres on the rear and less grippy ones on the front or add ballast and move it towards the front. You could mess about with the suspension settings but the above methods usually fix a sliding car.
 
Well power is nothing without control :D

I use some Toe and Camber settings:

Camber (f/r): 2.0/1.6
Toe (f/r): -0.25/0.00

With soft Springs slightly lowered car you´ll have a well balanced Car. Just tweak it the way you like it.

Also the LSD has a major effect.
I find following very good:
5/20/5

You could raise the deaccel setting to 10-12 to get a tighter rear but me like it loose :D
I don´t know the effects of them settings but I did some major personal testings and my above result is what I like the most (for FR, MR and RR cars).

FWD cars get a 5/5/5 or 5/10/5 setting depends on power.
AWD get a FWD/RWD combo.

What helped me with the Enzo is following:
Brake balance: 4/5
=> more to the rear
=> less understeer and still same brake distance (I think it´s even shorter...)
 
HoneyBadger
I purchased an NSX-R, heavily tuned it, and upon driving it found it mostly uncontrollable. As soon the back end starts to come around just a bit it tends to be very difficult to recover unlike with an FR car. Found the same thing with the McLaren F1. I'd like to know if others have experienced this issue and if so what adjustments have been made to increase stability.
Click to expand...


Most of the major garages will have NSX tunes so I'd suggest starting there. The MR cars usually have more than 1/2 their weight towards the rear, meaning it'll tend towards oversteer when cornering. The more weight is on the back of the car, the more it wants to rotate when cornering, hence the valid suggestion to add ballast and move it towards the front.

If you're running it online, make sure it's an online tune as the physics are different vs. offline. Try it out and compare the settings to stock and if you have any questions, specific questions that is, post them here or ask the tuner directly, I'm sure he/she will be glad to help.
 
All cars have an edge to their handling capability

FR cars will understeer when you push them

MR cars will oversteer

If you are losing the rear end, you are not driving properly. 45/55 are the best handling cars in the world. So practice..
 
MR cars can be really twitchy and prone to snap oversteer. This will be more likely to happen with high grip tyres, eg race tyres.

You need to get used to driving them; its a different style compared to FR.

Tuning a car can really screw it up. You can have too much power for the car, also you can easily make a car behave badly with a poor setup.
 
The NSX as well as the other MR cars responds well to tuning and proper set up. I won't post a setup because I have no idea of how you race. But beware those using lots of camber if you race with tire wear on

As for comments about too much power...well I disagree.
 
iamjajo
As for comments about too much power...well I disagree.
Click to expand...

Not necessarily the NSX, don't know, never used one.

Maybe I should have qualified it- without a good setup. You can overwhelm the stock setup of a car quite easily. Many cars require a skilled tune to deal with max power, and are still difficult to drive.
 
Add ballast to the McLaren, about 88 kg, to change the F/R weight distribution from 45/55 to 50/50 and also added the aero kit. Its like night and day, the car is a joy to drive now and if I get on the throttle a bit much coming out of a turn and the back end starts to come out I apply just a bit of countersteer and it straightens right up. Thanks again :)
 
MR cars tend to have a low polar moment of inertia (most of the car's mass is located near its center of gravity due to the engine being right behind the driver) which allows quicker turn in at the cost of stability. MR cars with a rear weight bias is actually the best way to go if you can control the car.
 
The first thing I usually do to any MR car is change the brake balance to 5/2 or even 5/1. That alone improves braking stability a lot.

Of course you can't change it sometimes, like during license tests, or that infamous Top Gear event with Elise on CH tires. In that case, my only advice is to bring a lot of patience.
 
Ballast!

You'll be amazed how much it'll change the snappiness of the NSX. Also if its as you say fully tuned, then also some diff work will be required to keep that inside wheel in check.

Making a car as close to 50/50 will give the car a neutral balance. It even to some extent helps with the RUF's, although you need to add maximum to get it close to 50/50 by which time you've lost the weight advantage
 
Take off ALL your tunes, and drive it stock. Maybe adjust the brake bias towards the front. I think the answer lies in your question: "I purchased...HEAVILY TUNED IT...etc." How can you "heavily tune" something if you don't know how it acts in the first place? Forget the ballast and everything else. Start from scratch. Try buying a new one and use it stock, and see if I'm right. Then, take JohnnyPenso's advise and go check out the NSX tunes. If you are new to tuning, check out Scaff's guide. Half of it seems Greek to me, but the more I work at it, the more I learn!

Scaff's tuning guide: https://www.gtplanet.net/forum/showthread.php?t=135268

It was written for GT4, but most if not all still applies.
 
Kamdoon
Take off ALL your tunes, and drive it stock. Maybe adjust the brake bias towards the front. I think the answer lies in your question: "I purchased...HEAVILY TUNED IT...etc." How can you "heavily tune" something if you don't know how it acts in the first place? Forget the ballast and everything else. Start from scratch. Try buying a new one and use it stock, and see if I'm right.
Click to expand...

Sorry, I have to disagree. I'm not talking about modding the engines to the max, but tuning diffs & suspension. I agree with you on the brakes, but as far as ballast is concerned, some cars simply need to be made more neutral..

Case in point, buy a new McLaren F1 & drive it as is on, say, Trial Mountain. Have fun. ;)
 
Last edited:

Latest Posts

Back