Speed Test acceleration tire choice

[Andy89]

Hey guys, I was messing up with the new awesome speet test feature, and I started to test stock cars to see if the in-game cars matches well the real counterpart, and I discovered that with stock tires (sport hard most of the times) every car is at least 0,2 - 0,3 seconds slower than the real counterpart in 0-100 kmh times. Then I tried to switch to Sport Soft and obtained more realistic results. Examples :

Ferrari 458 Italia, fully broken in, no oil change (563 bhp)

Real 0-100 = 3,4 seconds

SH Tires = 3,748 seconds starting in second gear, 4,053 starting in first (tires slides too much even if you modulate the throttle)

SS Tires = 3,408


McLaren F1 '94, fully broken in, no oil change (626 bhp)

Real 0-100 = 3,2 seconds

SH Tires = 4,087

SS Tires = 3,403

I tested more cars with pretty the same results, and all this testing made me think that for speed test sport soft are more close to the real counterpart, even if for lap times on normal tracks sport soft are too much grippy in my opinion. This made me think that the game lacks of grip at very low speeds, so that could be the cause of the discrepancy between real world 0-100 times and sport hard in game 0-100 times.

What do you think about it?

 

[c7mpr]

The trouble with the speed test is you are always staring on cold tyres, hence the discrepancy with real test results, also the slightest variation in road surface from the 'ideal' will produce a different result than the real world.

All that without discussion of launch techniques, traction control settings etc. etc.

 

[another_jakhole]

Not to mention, all the different factors! lol Only because I say that quite a bit

Seriously, there are too many different factors that affect these sort of comparisons.

There are a ton of more people that can explain in detail.

 

[phil_75]

Hey guys, I was messing up with the new awesome speet test feature, and I started to test stock cars to see if the in-game cars matches well the real counterpart, and I discovered that with stock tires (sport hard most of the times) every car is at least 0,2 - 0,3 seconds slower than the real counterpart in 0-100 kmh times. Then I tried to switch to Sport Soft and obtained more realistic results. Examples :

Ferrari 458 Italia, fully broken in, no oil change (563 bhp)

Real 0-100 = 3,4 seconds

SH Tires = 3,748 seconds starting in second gear, 4,053 starting in first (tires slides too much even if you modulate the throttle)

SS Tires = 3,408


McLaren F1 '94, fully broken in, no oil change (626 bhp)

Real 0-100 = 3,2 seconds

SH Tires = 4,087

SS Tires = 3,403

I tested more cars with pretty the same results, and all this testing made me think that for speed test sport soft are more close to the real counterpart, even if for lap times on normal tracks sport soft are too much grippy in my opinion. This made me think that the game lacks of grip at very low speeds, so that could be the cause of the discrepancy between real world 0-100 times and sport hard in game 0-100 times.

What do you think about it?

Only RS tyres give real life times

 

[Spagetti69]

Only RS tyres give real life times

Well that's a bummer.

Amar's crew did some testing awhile ago and the conclution was that choosing a level down from what is supplied. With the car gives the best results.

Obviously this is after the start and general physics whilst lapping with the car.

Seems different tires for standing start and then actual lapping.

 

[JDMKING13]

I get close to real life numbers and I mostly use CS I don't know why phil would say RS thats over kill.

 

[phil_75]

I get close to real life numbers and I mostly use CS I don't know why phil would say RS thats over kill.

Otherwise they just spin too much on launch!

 

[JTSnooks]

I took my real life car ('05 Pontiac GTO with headers/exhaust/tune) and the GT5 equivalent ('04 Pontiac GTO with a few minor upgrades to bring the power up to 420 which is roughly what mine makes) out to compare the times to my real life times.

In real life, I got my car down to a 12.94 @ 108.xx on the stock crappy tires, but this was on a sticky grippy dragstrip, but also before the headers, so only at 400hp. On drag radials on the strip I was able to get it down to a 12.7@109 with a burned up clutch and still before headers, but again on a sticky drag strip.

Best time with headers and a new clutch on a crappy track with a 2000'+ density altitude was a 12.9@109, on a better track or with better weather it's capable of easily a 12.5@110+ in it's current form.

In GT5, the best I could get on Sports Hards (which are supposedly stickier than the stock tires on the real GTO) with 420hp was around a 13.4 @ 106 or 107, IIRC. I jumped to racing softs, and reeled off a 12.9x @ 109.x.

Based on that, I'd say that racing softs do give you the closest time to real world, as they are roughly equivalent to running a car with street tires on a sticky drag strip.


Unfortunately, given GT5's terrible simulation of tire traction from a dead stop, you really can't accurately drive the car the way you would in real life, or you'll get slower times. In GT5, flooring it and burning the tires off is quicker than modulating the throttle with the tires on the edge of adhesion. Were that not the case you could probably get similar times to real life with lesser tires, but unfortunately it doesn't work that way with GT5's physics.

 

[dtn23]

I've also noticed that SH tires cannot produce the real life acceleration times, especially with higher power cars. The ZR-1 only managed a 3.8 0-60 no matter what I tried and only ran about a 12.7 in the 1/4 mile. The McLaren F1 refuses to catch traction and the 458 has to be launched in 2nd to even come close to real times. Somewhat disappointing, yes, but since the tire physics are uniform through the game, the cars should still compare fairly close. Except for that damn slow shifting '12 GT-R.

Also on another note, most 4WD cars can manage very close to real life times on SH tires, like the Aventador and the Evo's and STI's.