Toyo R888 Setup Information [Archive]

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06-04-2009, 10:58 PM

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<div><font size="1"><font face="Arial,Helvetica,sans-serif">The PROXES R888 was created using the latest innovation in Toyo's Racing technology making it the most extreme, and competitive R-compound tire in Toyo Tire's product offering.  The design changes incorporate several advancements in tread pattern design and construction, therefore car setup needs to cater specifically to the PROXES R888 and varies from PROXES RA1 recommendations.</font>  </font></div>
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<div><font color="#003399"><img height="195" name="ACCOUNT.IMAGE.19" border="0" width="135" contenteditable="false" alt="Proxes R888" src="http://origin.ih.constantcontact.com/fs020/1102509771360/img/19.jpg?a=1102594303756" align="left"> </img></font></div>
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<div /></font><font size="1">The tread of the PROXES R888 is significantly wider than the PROXES RA1 and requires less negative camber, and less slip angle to achieve even higher grip levels and cornering force values.  Due to the wider tread, using a lower camber setting will result in a more evenly dispersed contact patch thus creating more consistent hot temperatures across the tire and improving overall performance.  Using a driving style that requires less slip angle than what's used with the PROXES RA1 is also recommended, as this prevents excessive heat build up and premature wear.</font></font> </div></div></font></td></tr></table><a name="LETTER.BLOCK5" /><table style="background-color:#ffffff" id="content_LETTER.BLOCK5" width="100%" border="0" hidefocus="true" tabindex="0" cellspacing="0" cols="0" cellpadding="5" contenteditable="inherit" datapagesize="0" bgcolor="#ffffff">
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<td style="color:#FFFFFF;font-family:Arial,Helvetica,sans-serif;font-size:8pt;" align="left"><font color="#FFFFFF" size="1" face="Arial,Helvetica,sans-serif" style="color:#FFFFFF;font-family:Arial,Helvetica,sans-serif;font-size:8pt;"><font color="#3333ff">The PROXES R888 is not as susceptible to tread squirm and heat build up at full tread depth compared with the PROXES RA1, but shaving the tire to 4/32nds is still recommended for racing. <br />
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<div>The correct initial air pressure is critical to achieve an optimum contact patch shape.  Optimum cold inflation pressures are determined by the event distance and vehicle weight.  <br /> <br />Below are recommendations only, based on approximately 4 laps or more on dry tarmac.  Pressures shown below are for inflation with compressed air.  Please note that this information can vary based on car setup and driving technique:<br />  <br /><font size="2"><strong>VEHICLE WEIGHT        COLD INFLATION PRESSURES      HOT INFLATION PRESSURES</strong></font><br />Less than 800 kg.                    17 -  22 psi                                                      22 - 29 psi <br />800 kg. - 1000 kg.                    20 - 26 psi                                                       24 - 32 psi <br />1000 kg. - 1400 kg.                  23 - 27 psi                                                       28 - 40 psi <br />More than 1400 kg.                  27 - 35 psi                                                       37 - 42 psi <br />   <br /><strong>WET CONDITIONS & INFLATION PRESSURES</strong><br />For wet tracks (standing water), increase pressure by 4-10 psi compared to dry track pressures.  Increasing the pressure for wet tracks makes the tire's contact patch smaller, making the tire less susceptible to aquaplaning.  For optimum performance on tracks where there is standing water, tires with new depth or close to new tread depth will provide optimum performance.  Buffed or worn tires (3-1.5mm tread depth) will be susceptible to aquaplaning where there is standing water.</div>
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<div><strong>RIM WIDTHS & TIRE PERFORMANCE</strong><br />Toyo motorsport radials will provide optimum performance where the rim size allows the sidewall to have little or no protrusion from the rim flange.  For most sizes, optimum tire performance will be provided with rim widths that are from the mid point to the maximum in the range of approved rim widths.</div>
<div><br />Please refer to the PROXES R888 price list or visit www.teamtoyo.ca for suggested rim width information.</div></div></div></font></font></td></tr></table>
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<div><font color="#3333ff">Changing hot inflation pressure by small amounts (1-4 psi) can be used to fine-tune handling:<br /> <br />Reduce oversteer:      Reduce rear axle hot inflation pressure <br />Increase oversteer:    Increase rear axle hot inflation pressure <br />Reduce understeer:    Reduce front axle hot inflation pressure <br />Increase understeer:   Increase front axle hot inflation pressure <br /> <br />Changing hot inflation pressures to change handling bias should be used for fine-tuning only.  Improving overall grip levels should be done by tuning spring rates, sway bars, suspension geometry etc., and by using lap times and pyrometer readings to asses changes.  </font></div></div></font></td></tr></table>

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<div>OPTIMAL OPERATING TEMPERATURE</div></strong></i></font></td></tr>
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<div>A pyrometer is the best way to confirm that the tire is reaching its optimum operating temperature while also providing an accurate determination of temperatures across the tread.  Maximum grip levels can be achieved when the optimum temperature levels are evenly dispersed throughout the tread.<br /></div></font></font></td></tr></table><table style="background-color:#000000;background-color:#ffffff" id="content_LETTER.BLOCK9" width="100%" border="0" hidefocus="true" tabindex="0" cellspacing="0" cols="0" cellpadding="5" contenteditable="inherit" datapagesize="0" bgcolor="#000000">
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<div><font color="#3333ff">For more information on PROXES R888 technical information, or to  learn more about the full line of Toyo Tires, please visit toyotires.ca.  Toyo manufactures and distributes a complete line of replacement tires for high performance cars, luxury vehicles, light trucks and SUVs as well as tires for commercial trucks, buses and off-road and construction applications.<br /> <br />                                                                              #      #      #<br /> <br />Racing contact: toyoracing@toyocanada.com<br />Toyo Web Site:  www.toyotires.ca / <a href="http://rs6.net/tn.jsp?et=1102594303756&s=440&e=001nxA4U0eE0TPDNPpTuo3TsgZ0edkhNoi5-Iv6jeK7IGka2GQ5jdTBXpJeYbSgq6TwGxjwF6ZHuTCw2aAio6-4hzNFCZhfz4EP8IZFfxS_DUFKqmjQHOil6A==" target="_blank">www.teamtoyo.ca</a></font></div></font></td></tr></table></td>
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