Sustained cornering G's data-logged & tire compound
 

Can you who data-log share the maximum sustained cornering G's and what tires do you use while attaining the logged data?

Looking to baseline relative tire choice to cornering grip attainable.
Thank you.

275 Hoosier A6's. Typically 1.3-1.4 G's logging via Traqmate.


https://cimg1.ibsrv.net/gimg/www.evo...27b6585656.jpg


255 Street Tires, Bridgestone RE71's. 1.1 to 1.2ish

https://cimg3.ibsrv.net/gimg/www.evo...27b6585656.jpg

Thank you
Very nice

Andy, what are you running for pressures? Been trying to figure out what others are running but not a lot of info on Evo guys. I see pressure in the low 30s to low 40s, but I'm running 38psi square on 285s. Ive tried lower pressure and when I added some between a set of runs the car instantly got faster (this was on a 5th run, so feel confident pressures helped). Wondering about the low 40s though..

Andy how much does downforce come into play with your numbers? Are you seeing higher G's at higher speeds?

I found low low 30's to be quickest. When I ran high 30's I'd see high temps in the middle of the tire. Hoosiers loved to be pushed and pushed even more (at least the A6's). This was with 275's on 10.5in rims fyi.

I seem to notice higher G's at higher speeds vs lower speeds, however I'm not 100% convinced its aero. I need to run a session without my aero, then run one with. Then compare the logs to see if there is a big difference in speeds and G's.

I think for aero to make a big enough difference, you need a lot of it. I don't have much.

TA cars with some Aero claim 1.8-1.9 sustained G,
And I've seen some datalogs showing 1.6G dual purpose cars on Hoosier-like tires.
Calibration of accelerometer can lead to slanted readings.
I sure hope 1.6G is attainable without bigger wings and big splitters for downforce?

1.6 G is a lot, i am guessing you def. need an aero or huge sticky soft compounds...
I dont think i ever pulled 1.6G unless i crashed .lol

the pressure is crucial , but i cant comment on it here since i am allowed to run max 225's... so its a whole different ball game. Only thing i can add is, when we do track or hill climb on sticky - wider tires and not rally class, i tend to have a 40+ psi when i am done.

There, now I can claim 2G's. lol. All I did was turn all filtering off.

https://cimg1.ibsrv.net/gimg/www.evo...27b6585656.jpg

1g sustained isn't hard, I remember before the Evo came out the first one I read about was the Cobra R if some of you remember that car. That's on street tires. I think those Aus TA cars were doing 1.7-1.9's.

Here's my last run at RAtlanta, this is on BFG R1S 265's. AP brakes rock ;)


https://cimg5.ibsrv.net/gimg/www.evo...27b6585656.jpg

Thank you Balrok

Yes, 1.6 is hard Rob.
However, lighter S2K and SuperMiata, and perhaps Lotus Exige/Elise, competitors are finding their way to 1.5-1.6G, so I trust some of you are too.

And for sure Professional Awesome Racing Team, Tony Szirka, and the likes, are hitting 1.8-1.9G with their big wings.

Rob-lets talk Reiger...
Can you check your PM -with my email/phone- please.

i never really checked the gs. for us not really matters. wonder what we can pull now. i might look into it. just for fun.

pm,
tonite ill do.

On gravel you are unlikely to pull past 0.7G or much more, but for track/roadrace its the measure of grip and therefore main component of corner speed.

Before I datalog myself, I would like know what can be attained, and on what tire, to be able to set realistic goals and judge/evaluate the data.
So far it seems that somewhere around 1.4-1.5Gs is the limit of adhesion for none or low downforce road based track-car on track-rubber like Hoosier R7.

http://i133.photobucket.com/albums/q...psnuwhz06b.jpg

two ways to make a turn. efficient - fun.
i am sure the efficent makes higher G's, but the other one makes a lot bigger smiles :) :) :)

oh side note... i am living next week to San Francisco and be there about 3 weeks. :)

According to Solo Storm that I use, G readings are mostly between 1.05 and 1.25, with few jumps over that range up to 1.4.

I remember that with old 2G on 285 Hoosiers, we were getting 1.5-1.6 regularly.