Jump to content

Photo

What is max sustained lateral Gs with Hoosier SM tires?

- - - - - lateral Gs tires

  • Please log in to reply
10 replies to this topic

#1
Brendan O

Brendan O

    Member

  • Members
  • PipPipPip
  • 215 posts
  • Location:Huntsville, AL
  • Region:SE
  • Car Year:2003
On an average day, average temperature, with the perfect radius flat corner (no bank) and a good driver, how many lateral G's can an SM pull with perfect suspension setup and Hoosier SM tires at perfect pressure/temperature? By sustained I mean more than 1.0 seconds. Is more than 1.0 g possible? When I look at my data I see 1.1g and 1.2g but they are for very short spikes that I think is just accelerometer sensor noise.

thanks

#2
Tom Sager

Tom Sager

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 1,693 posts
  • Location:Chicago Suburbs
  • Region:Central
  • Car Year:1996
  • Car Number:94
I don't know if anyone can answer your question for Toyo or Hoosier as you have asked it. So many corners are not perfectly flat and steering inputs through a corner make a difference as does temperaure and track surface.
Donor - Made PayPal donation Bona fide - A bonafide Spec Miata driver We have a Winnah! - Won their 1st race... Congratulations! Make it Rain - Made Paypal donation of $100+

#3
Den

Den

    Member

  • Members
  • PipPipPip
  • 48 posts
  • Location:Columbus, OH
  • Region:OVR
  • Car Year:1991
  • Car Number:37
How about just skid pad data comparison. Might that give a meaningful measurement? Just asking as I have no experience to draw on.

#4
James York

James York

    AKA Cajun Miata Man; Overdog Driver

  • SMembers
  • PipPipPipPipPip
  • 898 posts
  • Location:Texas, SWDiv
  • Region:Houston
  • Car Year:2003
  • Car Number:03

On an average day, average temperature, with the perfect radius flat corner (no bank) and a good driver, how many lateral G's can an SM pull with perfect suspension setup and Hoosier SM tires at perfect pressure/temperature? By sustained I mean more than 1.0 seconds. Is more than 1.0 g possible? When I look at my data I see 1.1g and 1.2g but they are for very short spikes that I think is just accelerometer sensor noise.

thanks


Does it matter? Besides the curiosity, will the number cause you to drive or setup your car different?

James York


sponsored by:
Stan's Auto Center, Lafayette LA

powered by:
East Street Racing, Memphis TN


2003 Spec Miata
#03

Bona fide - A bonafide Spec Miata driver

#5
JP3

JP3

    Member

  • Members
  • PipPipPip
  • 26 posts
  • Location:Sealy
  • Region:southwest
  • Car Year:1990
  • Car Number:1
If some one knows I would like to know .I believe it would help me change set up for different tracks TWS verse TMS. Plus the ones with data can see how big there ba//s are . :clap:
Grand-Am Winner in a Mazda - Grand-Am Winner in a Mazda Donor - Made PayPal donation Series Champ - Won a points based series in a Spec Miata Bona fide - A bonafide Spec Miata driver

#6
Jim Boemler

Jim Boemler

    Veteran Member

  • Moderators
  • 852 posts
  • Location:Mukilteo WA
  • Region:NWR
  • Car Year:1992
  • Car Number:30
I see just over 1.2 Gs consistently on Toyos, but I've seen other data that indicate more like 1.3. It's in that area somewhere. Not sure how knowing that helps you set up the car, though. Of course you can adjust and try to maximize the number, but in doing so you're back to a self-relative number. I haven't seen the number be terribly sensitive to setup adjustments, BTW.

Sorry, never driven the Hoosiers.

#7
JP3

JP3

    Member

  • Members
  • PipPipPip
  • 26 posts
  • Location:Sealy
  • Region:southwest
  • Car Year:1990
  • Car Number:1
Thanks 4 help with toyos but we now need real world Hoosier facts :rockband:
Grand-Am Winner in a Mazda - Grand-Am Winner in a Mazda Donor - Made PayPal donation Series Champ - Won a points based series in a Spec Miata Bona fide - A bonafide Spec Miata driver

#8
Caveman-kwebb99

Caveman-kwebb99

    Veteran Member

  • SMembers
  • PipPipPipPipPip
  • 3,062 posts
  • Location:World Wide
  • Region:Great lakes
  • Car Year:2000
  • Car Number:99
My data on hoosiers suggests that number is just over 1.3 there are no banked turns at Mid ohio. with a max of very close to 1.5.

K. Webb
Powered by East Street Racing (Best engines in Spec Miata)

Driver coach, Spec Miata Prep shop, Spec Miata Setup

2016 Hard Charger award passing 12 cars runoffs 2016 Mid Ohio

2016 P3 RUNOFFS OVER 40 DIVISION LOL!

2015 First consolation prize Northern Conference Majors Title Pageant
2015 Winner Circus Cat Majors Road America

2015 Winner BlackHawk Majors crash fest

My Signature is still not as long as Danny boy's
 

 

 

Donor - Made PayPal donation Majors Winner - Chatterbox - Blah blah blah... Blah blah blah Instigator - Made a topic or post that inspired other Bona fide - A bonafide Spec Miata driver We have a Winnah! - Won their 1st race... Congratulations! Make it Rain - Made Paypal donation of $100+

#9
Brendan O

Brendan O

    Member

  • Members
  • PipPipPip
  • 215 posts
  • Location:Huntsville, AL
  • Region:SE
  • Car Year:2003
Thanks for input. I'm new to SM. I was not going to use answers to change my driving or setup. I asked because i mentioned 1.15 to a friend who drives 944 and he was skeptical. I'll check my data again. 1.15 was probably not sustained.

#10
Jim Boemler

Jim Boemler

    Veteran Member

  • Moderators
  • 852 posts
  • Location:Mukilteo WA
  • Region:NWR
  • Car Year:1992
  • Car Number:30
1.15 shouldn't be a problem, sustained, assuming a clean/dry surface.

#11
Randy Thieme

Randy Thieme

    Member

  • SMembers
  • PipPipPip
  • 277 posts
  • Region:Oregon
  • Car Year:1993
  • Car Number:51

On an average day, average temperature, with the perfect radius flat corner (no bank) and a good driver, how many lateral G's can an SM pull with perfect suspension setup and Hoosier SM tires at perfect pressure/temperature? By sustained I mean more than 1.0 seconds. Is more than 1.0 g possible? When I look at my data I see 1.1g and 1.2g but they are for very short spikes that I think is just accelerometer sensor noise.

thanks


As worded the question might have tried to make conditions a little too specific. Probably the reason for some of the responses you got. And comparing to a 944 is a little bit apples-to-oranges. But if the question were reworded to state "with ideal set-up for the tire and all else being equal how much lat G will the new Hoosiers generate compared to RA-1s?" - That is an excellent question since it directly relates to the truth about faster lap times. Any percentage increase or decrease in lat G will give the square root of the increase or decrease in speed through the corner. A 4% increase in lat G will mean a roughly 2% increase in speed. Basic physics will give a new ballpark change in time down a straight-away based on the new corner exit speed. This leaves the unknown changes in acceleration due to rolling resistance, rotational enertia, and/or different toe-in/toe-out. Suffice to say if the Hoosiers do not support a significant increase in lat G then for the rumoured 2 second increase in lap time to be true that 2 seconds needs to come from someplace else.
Make it Rain - Made Paypal donation of $100+ Bona fide - A bonafide Spec Miata driver





Also tagged with one or more of these keywords: lateral Gs, tires

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users