Pirelli DH "spring rate"
10-28-2016, 03:48 PM
#1
Pro
Thread Starter
Pirelli DH "spring rate"
Where would I find the tire "spring rates" @ x PSI for the following tires:
Pirelli DH
245/645 18
305/660 18
305/680 18
Pirelli DH
245/645 18
305/660 18
305/680 18
10-28-2016, 04:21 PM
#2
Rennlist Member
if the question is , what pressure do i use with a 680 vs 660, i would say generally, i would use 1-2 more PSI on the taller tire, to achieve the same (spring rate) but that's a guess and has worked successfully with my set up.
10-28-2016, 04:34 PM
#3
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I would start with asking Pirelli or your tire dealer. Hoosier will provide it for some of their tires and I know other manufacturers have done it before. If not, then you get a fun garage project to find it.
10-28-2016, 05:19 PM
#5
Rennlist Member
Actually, vertical and long are not equal. Vertical is compression , but there is a longitudinal spring rate too that happens at max slip/force %. its a tangential force
10-28-2016, 05:53 PM
#7
Pro
Thread Starter
>> rate too that happens at max slip/force %.
I see what you meant. All we're concerned about here is the normal force. Nothing tangential.
I see what you meant. All we're concerned about here is the normal force. Nothing tangential.
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10-28-2016, 06:09 PM
#8
Rennlist Member
let us know what you find. very interested to see a spec or chart for that.
10-28-2016, 11:38 PM
#9
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Once you see how far a 3 piece wheel deflects on the inner hat on a Cup Car going around a corner, spring rate of the tire becomes somewhat of a moot point....
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greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
10-29-2016, 09:22 PM
#10
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10-30-2016, 12:21 PM
#13
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Originally Posted by lordpantsington
Might this help?
http://www.britishgt.com/documents/t...sh_GT_2016.pdf
http://www.britishgt.com/documents/t...sh_GT_2016.pdf
06-06-2017, 03:13 PM
#14
Pro
Ran across these last night, remembered the thread, thought it would be good to put it all in one place, enjoy!
http://www.competentmotorsport.com/w...ta-Booklet.pdf
http://www.competentmotorsport.com/w...y-2017-v.2.pdf
http://www.competentmotorsport.com/w...ta-Booklet.pdf
http://www.competentmotorsport.com/w...y-2017-v.2.pdf
06-06-2017, 03:38 PM
#15
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"Combining the Art and Science of Driving Fast!"
Specializing in Professional, Private Driver Performance Evaluation and Optimization
Consultation Available Remotely and at VIRginia International Raceway