Volk SF Challenge

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0 height="100%"><tr> <td valign="top" width=200 BGCOLOR="#333366" TEXT="#080000" background="040c8c00dkcfsz.png"> <div> <A HREF="id31.htm" TARGET="_top" TITLE="1995 3000GT Spyder VR4"><U><B>Back</B></U></A></div> </td> <td valign="top" BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <FONT SIZE="5" COLOR="#666633" FACE="Arial" ><B>JNS Engineering</B></FONT>     |     <A HREF="index.htm" TARGET="_top" TITLE="JNS Engineering"><U>home</U></A></div> <div> <A HREF="id36.htm" TARGET="_top" TITLE="Powder Coated Calipers"><U>Powder Coated Calipers</U></A>   |   <A HREF="id38.htm" TARGET="_top" TITLE="Remote Top / Remote Start"><U>Remote Top / Remote Start</U></A>   |   <A HREF="id37.htm" TARGET="_top" TITLE="Custom Leather Seats"><U>Custom Leather Seats</U></A>   |   <A HREF="id39.htm" TARGET="_top" TITLE="Lash Adjusters"><U>Lash Adjusters</U></A>   |   <A HREF="id40.htm" TARGET="_top" TITLE="Throttle Body Rebuild"><U>Throttle Body Rebuild</U></A>   |   <A HREF="id41.htm" TARGET="_top" TITLE="Chrome Upper Engine"><U>Chrome Upper Engine</U></A>   |   <A HREF="id44.htm" TARGET="_top" TITLE="Steering Boots"><U>Steering Boots</U></A>   |   <A HREF="id45.htm" TARGET="_top" TITLE="ECS Struts and Springs"><U>ECS Struts and Springs</U></A>   |   <B>Volk SF Challenge</B>   |   <A HREF="id48.htm" TARGET="_top" TITLE="Wheel Stud Replacement"><U>Wheel Stud Replacement</U></A>   |   <A HREF="id49.htm" TARGET="_top" TITLE="ABS Troubleshooting"><U>ABS Troubleshooting</U></A>   |   <A HREF="id50.htm" TARGET="_top" TITLE="Dyno Day 10/10/10 at FSR"><U>Dyno Day 10/10/10 at FSR</U></A>   |   <A HREF="id51.htm" TARGET="_top" TITLE="Spyder mechanisms"><U>Spyder mechanisms</U></A>   |   <A HREF="id53.htm" TARGET="_top" TITLE="AWD Driveline"><U>AWD Driveline</U></A>   |   <A HREF="id52.htm" TARGET="_top" TITLE="Respray Project"><U>Respray Project</U></A>   |   <A HREF="id54.htm" TARGET="_top" TITLE="Clear Cam Gear Covers"><U>Clear Cam Gear Covers</U></A>   |   <A HREF="id42.htm" TARGET="_top" TITLE="Pics"><U>Pics</U></A></div> <div> <I>Volk SF Challenge</I></div> <div> <B>Initial Planning</B></div> <bR> <div> My car: 1995 Spyder VR4</div> <div> Original wheel size: 17x8.5 offset +46mm</div> <div> Original tire size: 245/45/17</div> <bR> <div> New wheel size: 18x9 offset +34mm High Pad (Disk A)</div> <div> New tire size: 255/40/18</div> <bR> <div> From <A HREF="http://www.1010tires.com/WheelOffsetCalculator.asp" TARGET="_top" TITLE="http://www.1010tires.com/WheelOffsetCalc"><U>1010tires wheel offset calculator</U></A> I put in the original size and offset and the new size and offset. The calculator says the new wheel has 6mm more clearance to the strut and the wheel will extend 18mm more than stock.</div> <bR> <div> From <A HREF="http://www.1010tires.com/TireSizeCalculator.asp?action=submit" TARGET="_top" TITLE="http://www.1010tires.com/TireSizeCalcula"><U>1010tires tire size calculator</U></A> I put in the original and new tire sizes. The calculator says the new tire height is .35 taller than stock which will cause the speedometer to read 1.36% too slow.  I could have gone with 245/40/18 which would be almost exactly stock height and speed but I wanted a little more aggressive stance and some of the 3SI folks say that the speedo will actually be more accurate.  It gives a rim width range of 8.5-10 so that works.</div> <bR> <div> I don't believe the wheel offset calculator proves that the spokes will clear the calipers. The SF Challenge is available in a Disk A, Disk B, and Disk C where the Disk A is said to work with big brake kits. Pearlstealth and GTOX have run staggered setups at 19x8.5 (offset +34, disk A) up front and 19x9.5 (offset +40 rear). I decided against running a 19 inch wheel on the Spyder for fear of a harsh ride affecting the top seals. The wheel offset calc has the 18x9 wheel with 6mm more strut clearance and extending 18mm from the fender.</div> <bR> <div> Rays Engineering publishes the depth of the wheel lip at 56mm for the 18x9 that I chose and 50mm for the 19x8.5. So that tells me the spokes are at (18-50) or -38 for the 19x8.5 and (12-56) or -38 for the 18x9. So I claim that relative to the outside edge of the rim, the spokes are at the same offset from the caliper on both wheel sizes.</div> <bR> <div> So, near as I can tell the 18x9 offset +34 will fit the fronts and clear the 2nd gen calipers just like they do on GTOX 98 VR4. </div> <bR> <div> <B>Finally received the wheels</B></div> <bR> <div> After a long nearly 3 month wait the rims have arrived in 4 boxes each listed at 24 lbs.</div> <div> <IMG SRC="1de80a90.jpg" border=0 width="640" height="425" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> Heavy duty cardboard angle shims on each side and a protective cloth / elastic cover</div> <div> <IMG SRC="1e080a90.jpg" border=0 width="640" height="425" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> 18x9 goodness in RMC finish</div> <div> <IMG SRC="1e280a90.jpg" border=0 width="640" height="425" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> Valve stems, lug nuts, and hubcentric rings included.  Unfortunately Mackin Industries packed the wrong sizes.  The lugs should have been 12x1.5mm and instead they provided 12x1.25mm.  The hubcentric rings should have been 67.1mm ID and instead they provided 66mm ID.  Interesting to note that the incorrect sizes are the required fitments for the Supra and 350Z.</div> <div> <IMG SRC="1e480a90.jpg" border=0 width="640" height="425" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> Testing fitting the new rim to make sure of the spoke clearance.</div> <div> <IMG SRC="1e680a90.jpg" border=0 width="640" height="425" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> There is about 0.25 inches of clearance which is nearly identical to the Spyder 17 inch chrome rim it replaces.</div> <div> <IMG SRC="1e880a90.jpg" border=0 width="640" height="425" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> Checking the strut clearance.  There is nearly 0.75 of an inch clearance which is about 0.25 more than before.</div> <div> <IMG SRC="1ea80a90.jpg" border=0 width="640" height="425" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> Rears look pretty flush and fronts stick out a little.</div> <bR> <div> <IMG SRC="1f000a80.jpg" border=0 width="1024" height="680" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> <IMG SRC="1f200a80.jpg" border=0 width="1024" height="680" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> <IMG SRC="1fa00a80.jpg" border=0 width="1024" height="680" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> <IMG SRC="1f600a80.jpg" border=0 width="1024" height="680" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> I was having some issues with rubbing on the passenger rear so I bought the 3SX adjustable rear control arms.  These have an exposed heim joint and I ended up buying some boots from Seals It on Ebay.  The size I ordered was RERS-3 and you get 6 boots.  This shot shows one of the control arms as shipped where the sleeve is secured with a tie wrap.  The second one is disassembled with a boot already pulled over the eye of the heim joint.  It's pretty tough to stretch it on there.  Not shown are the two boots I tore open in the process.</div> <bR> <div> <IMG SRC="2e300a80.jpg" border=0 width="1024" height="680" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> The second shot shows the two completed control arms with boots installed.  Here you can see the boots have to be stretched really far to go over the sleeve.  I used the end of a coathanger with a 45 degree bend as a tool to pull the boot over the sleeve and also to stretch them open so I could squirt lithium grease inside the boot after installation.  With these control arms adjusted to the shortest length I am able to run about 2.5 degrees of negative camber to keep the tires from rubbing the wheel arch.</div> <bR> <div> <IMG SRC="2e500a80.jpg" border=0 width="1024" height="680" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> </td> </tr></table></body>