General "Tuning" question

  • Thread starter Thread starter ezzywave
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ezzywave

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New guy here. I have a question about tuning. How accurate is the tuning in GT4 compared to real cars (and physics!). For example - Does lowering the ride height really do what we think it does, less air resistance, less clearance for tires, etc. Or does it just let the tires hit the wheelwell and completely ignore air resistance. Has anyone heard from the programmers? Thanx.
 
ezzywave
New guy here. I have a question about tuning. How accurate is the tuning in GT4 compared to real cars (and physics!). For example - Does lowering the ride height really do what we think it does, less air resistance, less clearance for tires, etc. Or does it just let the tires hit the wheelwell and completely ignore air resistance. Has anyone heard from the programmers? Thanx.
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Some of the things do. Some of the things don't. I tune cars both on this game and in real life and Gran Turismo is really off when it comes to this kinda stuff, it's far from a tuning simulator.

Regards,
Kevin
 
Lowereing the ride height appears to mostly affect the cars center of gravity as relates to handling. There are many subtle effects and control responses the programmers apparently wanted to include while understanding they had a limited interface. Try to imagine the challange to simulate the (obvious in real world) sensation of too stiff compression damping over washboard for each pair of wheels and then code it through a dual shock controller or even a feedback steering wheel. Lowering the ride height may indeed affect other things besides c.g. and available suspension travel, but the effects are subtle. I knew of a tuner during GT2 that made very effective use of low front ends and high rears. I was thoroughly skeptical and was bullishly convinced that nothing could improve on low c.g., certainly not the unbalanced wedges this guy was posting. Well his tunes were phenominal, when I finally overcame my stubborness and even more amazing- to me- was his explanation: he said he was making use of the bodies wedged aerodynamic shape to hold it down! Well, I have not been able to get similar results in GT4, but would not be surprised if it is possible. Btw, ezzywave, greetings from White Salmon in the Gorge :)
 
yes, lowering your car reduces overall wind resistance and allows you to reach a higher top speed. some people say the downforce isn't exactly accurate, it is different in cornering than a real life car

i would assume the game just applies an overall resistance to the power output of the car, and a front and rear downforce to the traction of the wheels at those locations, rather than dynamically modelling the whole car in a wind tunnel thousands of times per second

you can bottom the car out on the suspension (and you hear a clunk), you can also scrape really low cars along the ground or ripple strips (and you will see sparks come off). this adversely affects your handling but unsettling the car like it would in real life. sometimes you come into a corner off a jump and your braking is totally stuffed up from the jump (laguna seca, nurburgring, capri city course) so you have to take the jump differently

whilst some aspects of gt4 physics are very realistic, it will be many years (if ever) before one can accurately totally model a real car on a home console. gt4 is realistic enough to be considered a very accurate game, or a less than perfect simulation, and seems to be copping alot of flak for it

you just need to remember, it's a $200 playstation with a $80 game, not a multi-million dollar supercomputer
 

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