Lol I havequestions in this forum too :)

  • Thread starter Aksys
  • 6 comments
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OK, I seem to be asking a lot of questions. too many maybe, but bear with me :)

I've always wanted to get into "tuning" a car, I've owned GT series from GT3 to until now, and I always thought the cars were what they were- nothing more, can't change anything, etc. But then I found this forum, and i drowned in the world of spring rate, dampers, camber, toe, etc.

Anyways, I want to start tuning my own cars, and I've read Scaff's guides and some others here, (some drifting tuning ones, some normal ones.) but I see one major- confusion you might say.

Guides often recommend a certain "direction", per say, for a problem (be it understeer, oversteer, fishtailing, no grip, braking distance, etc). However, I see a lot of tunes from the garages that I visit, and the tunes always, always ALWAYS differ. For example, for the Amuse S2000 GT1 Turbo (one of my favorite cars :P), the tunes differ a lot.

1. Avid (Vette? Idk, sorry Q__Q) puts a spring rate of 16.2 / 15.8
2. Tharain puts a spring rate of 14.0/13.0
3. And then suddenly Wienish' puts spring rate of 12.0/16.0

I don't know id that was an ideal description of what I'm facing right now, but I think it somewhat manages what I want to say.

Another example:
Nissan GT-R V-Spec '09
1. JC has damper values of
damp ext:4/7
damp com:7/6

2. And then Mazdaman has damper values of
8F/6R
8F/6R


When I first read the guides, I thought I knew what I was doing, but when I compared what I tuned to other people, Their tuning settings were completely different and still worked better than mine!

Is there a way to somehow "tune" a car to fit your style?
like, a loose outline of what to tune first, etc.
I'm not asking for a range of numbers for each car, but a series of steps of how to tune a random car out of the dealership.
Would you tune transmission first? OR suspension? Or maybe brakes?

And since there are so many factors that affect a single trait of the car, how would you know which one to change?

Doesn't
-lowering front ride height
-Lowering front damper settings
-Lowering front anti-roll bars
all decrease understeer? Then which do you change? All of them at the same time?

TL;DR --> Is there a basic outline tuners use to tune their cars? Like ride height first, then spring rate.. etc, or is it just a free for all hope for the best stab kind of thing?
 
Whilst understanding the working mechanics of a car is important, and understanding the affects of suspension, LSD etc is also important, the best advice for tuning your own is to start small. Very small....

Don't Full Race tune the engine, lighten then body and windows before you look at the issues at hand with the car, stock from the used car or new car sections.

Drive the car hard, understand what the car does if driven fast into a bend, does it understeer, or oversteer, do the brakes work, do you get limited power when exiting an apex. that sort of thing. Then go about tweaking the suspension, tyres, LSD. Once your happy you have managed to tune out any bad behaviour then go for more aggressive tuning on the engine and performance.

This advice is more important when you start buying cars that have pre-tuned engines and chassis etc. For example, buy the Amuse 380 and you have a pre-tuned car that is capable and can be tweaked and tuned without any prior work. yes it can be tuned more, but out of the box is a car that needs some work to get the best from the engine etc.

Work on the car until you have ironed out any issues with driving, then apply more tuning.

Off-course as you tune a car, your existing settings may need tweaking to compensate for more power, and different behaviour.

Failing that don't worry to much about the science. There are skilled tuners here on this forum who are happy to share their findings with us mortals and also they often explain how they got to tuning a specific car in a certain way.

Me - I always start with Suspension, Camber and Toe then work my way through LSD, Down force if applicable and then gearbox and engine tuning..
 
Best thing I can suggest for a beginner tuner...

One of the premium Miatas with full engine tuning but no turbo or supercharger, fully weight reduced, with an FC suspension and comfort hard tires. Keep the stock transmission and differential at first while you work on the suspension. Car has next to no grip and isn't particularly fast BUT has enough power for the tires to mimic a higher powered, grippier car at much more sane cornering speeds, giving a very good way to see what does what with a big dopey grin on your face.
 
Some people seem to like this a lot.

https://www.gtplanet.net/forum/showthread.php?t=198067

I may be a little bias, since I wrote it.

But it seems like many people are getting close to a good tune for their cars by using this. Just follow the directions in the thread, and then use what you have learned about tuning thus far to fine tune the car in right where you want it.
 
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