hmd Posted April 22, 2015 Posted April 22, 2015 Assuming you have longer wheels studs, what is the max size of wheel spacers you would use on a Z in motorsport application? Quote
d3c0y Posted April 22, 2015 Posted April 22, 2015 I had 30mm bolt on spacers on my road car and it was fine. Quote
dat2kman Posted April 22, 2015 Posted April 22, 2015 Scrutineers will want to see it mechanically fastened to either hub face, or back side of rim. As simple as a countersunk head single machine screw into a tapped hole, to retain it in position, in case wheel parts company with car, and spacer becomes a missile. Quote
hmd Posted April 22, 2015 Author Posted April 22, 2015 Scrutineers will want to see it mechanically fastened to either hub face, or back side of rim. As simple as a countersunk head single machine screw into a tapped hole, to retain it in position, in case wheel parts company with car, and spacer becomes a missile. Would you feel comfortable running 20mm spacers with heavier load on the track? Quote
dat2kman Posted April 22, 2015 Posted April 22, 2015 Plenty do, with longer studs, but, with the design of the Z stub axle to its flange mount, which is then attached at the bottom of the flange to the strut, the stub can and does flex the flamge it is mounted to. Secondly, as the stub axle necks down from thick to thin diameter, it too will flex,. Imagine you are turning into Turn 1 at Phillip Island, a Right Hander, what is occuring to the front left wheel, with its sticky semi slick tyre, is, it is trying to "Tuck" under, ie go into a more positive camber mode. There are two " fixes" for this,,, Quote
dat2kman Posted April 22, 2015 Posted April 22, 2015 Hope these upload Not Datsun items, but note the bracing welded at top f stub flange, to stop flange flexing out. Second pic, is a machined collar to prevent round stub from flexing, it is carefully faced to correct length to allow correct hearing freeplay. Quote
dat2kman Posted April 22, 2015 Posted April 22, 2015 Above is stub tube thing, Here is flange brace Quote
tir33d Posted April 22, 2015 Posted April 22, 2015 Ha beat you all, I have 50mm in front and rear. Studs replaced with 3.5 inch long ARP 1/2 inch studs. Spacer then uses another set of 3.5 inch studs to hold wheel. I run a 285 tyre and haven't broken any due to normal racing. Dump the clutch and you break shit. LS1 track car (or sports sedan as some say - but without the budget) Quote
d3c0y Posted April 22, 2015 Posted April 22, 2015 It all depends on the offset of the wheel too, because if you are using spacers to run a +ve offset wheel you are just centering the wheel on the spindle anyway. Quote
hmd Posted April 22, 2015 Author Posted April 22, 2015 It all depends on the offset of the wheel too, because if you are using spacers to run a +ve offset wheel you are just centering the wheel on the spindle anyway. Yes, I am just looking to get back to zero offset from a +20 wheels. Quote
dat2kman Posted April 22, 2015 Posted April 22, 2015 Yes, I am just looking to get back to zero offset from a +20 wheels. What + 20 rims you using? Quote
hmd Posted April 23, 2015 Author Posted April 23, 2015 What + 20 rims you using? Watanabe 14x6. Quote
d3c0y Posted April 23, 2015 Posted April 23, 2015 Why not just buy wheels that are the right size if you are worried? It's not like correct offset wats are hard to find. Quote
hmd Posted April 23, 2015 Author Posted April 23, 2015 Why not just buy wheels that are the right size if you are worried? It's not like correct offset wats are hard to find. Not a lot of choice for 14x6 4x114.3 Quote
dat2kman Posted April 23, 2015 Posted April 23, 2015 The series 2 280ZX rims ( five spoke, not Iron Cross) are in 6" and have a more suitable backspace, no need for spacers with those. Get the nuts that belong to these rims. If you do run a spacer, you'll need lnger studs, the nuts are domed end, just machine off the domes. I have older style aftermarket 14x6 rims, at $200 per set in 14x6 with the not so pos offsetts. Quote
d3c0y Posted April 23, 2015 Posted April 23, 2015 20mm bolt on spacer for you then. Done. Next... http://www.ebay.com.au/itm/2PCS-4x114-3-Wheel-Spacers-20mm-Thickness-1-25mm-thread-hub-centric-BRAND-NEW-/221720388664?pt=LH_DefaultDomain_15&hash=item339f90a438 Quote
dat2kman Posted April 23, 2015 Posted April 23, 2015 20mm bolt on spacer for you then. Done. Next... http://www.ebay.com.au/itm/2PCS-4x114-3-Wheel-Spacers-20mm-Thickness-1-25mm-thread-hub-centric-BRAND-NEW-/221720388664?pt=LH_DefaultDomain_15&hash=item339f90a438 Would not use those in circuit racing, lnger studs, and slip on. ARP make a very superior 1/2" UNF 20TPI stud, nuts are Ford. Quote
Cozza Posted April 23, 2015 Posted April 23, 2015 20mm bolt on spacer for you then. Done. Next... http://www.ebay.com.au/itm/2PCS-4x114-3-Wheel-Spacers-20mm-Thickness-1-25mm-thread-hub-centric-BRAND-NEW-/221720388664?pt=LH_DefaultDomain_15&hash=item339f90a438 You might struggle using those ones, they have a 66.1mm hub bore. I think S30 fronts are about 73mm. Others may have a different opinion but, I'm not sure if hub centric is important considering the wheels are not hub centric why would you need the spacers to be? I got my 25mm bolt on spacers from Ben at Otomoto Great product and service. You could try find someone with a 1600 / 180B (pretty sure they run 20-25mm offset with standard struts) you could sell your wheels to and get yourself some 0 offsets. Cheers Mick Quote
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