I know there are bolt on spacers, but I'd prefer to use longer studs and sandwich spacers. I can use hubcentric rings, but if the spacers are hubcentric then that would be even better. Anyone know of any companies that make them? And would 15mm spacers in the rear be safe for 350rwhp?

 

Yups, I can get you those.

Only thing is you'll need to source ARP Studs. The package I'll send to ya will have studs but they will be for a different car. I can get you the hubcentric spacer without a problem.

I have the ARP part #'s somewhere and most people just buy them from summit racing. It will cross reference with camaro and corvette's of certain years.

I'll reply to your pm right now.

Rishie

 

Yummmmmm hubcentric sandwhich.........

 

Spacers are perfectly safe, as long as they're used correctly with properly torqued wheels, but even with no spacers if you have loose nuts you'll have problems.

The load is trasnferred mainly through the surfaces of the wheel, spacer and hug, aided by the compression supplied by the studs. Contrary to popular belief the studs shouldn't be loaded in bending when using a spacer.

 

Hmm... good to know. I talked this over with a friend, and he recommended sandwich spacers over bolton spacers for higher horsepower cars for safety reasons. Any thoughts to this? Assuming I have wheels and a bolton spacer torqued to 85 lbs. or so, would sandwich spacers be better?

Edit: and by higher horsepower, I mean like 350ish rwhp daily driven and 400rwhp for strip/dyno days.

 

you shouldn't really have a problem with either kind of spacer unless you don't tighten the lugnuts... or seriously overtighten them.

 

I'd say there's little performance difference to make one more desirable. The ones with studs will probably end up being heavier with another set of studs instead of just longer ones, and there's that other set of nuts too, and less space to drill holes. They are more conveniant though as you don't need longer studs, which on the FC requires that the rear hubs be pressed off.

With a universal sandwich type spacer it won't center and can cause vibrations from the offset weight. There's less chance for vibrations on a spacer with studs as it'll on each set of studs, but you could conceivably have those bolt circles slightly offset on a low quality piece causing vibrations, not that I've ever heard of these things happening, just theorizing. The studs on the spacer might not be as high quality as the long ARP studs, so that could be a potential source of concern, but again, just theorizing.

 

lol. save 1/8 pound per wheel, and you might notice .0001 seconds of your lap time on an 8 mile circuit!

also, a cheap bolt on spacer could potentially break in half and jam between the wheel and the brake caliper, causing the car to flip and explode into a gas station, causing a whole city burst into flame.
not that I've ever heard of this happening, just theorizing, as it could be a potential problem.

 

It's not nice to make fun of people. He was asking for reasons why one might be better and I posted what I thought might be some potential problems, things that I could reasonably see happening.

With all these cheap knock off eBay companies springing up I can certainly see someone making a spacer with low quality studs to save a few dollars, and even OEM studs aren't as high quality or as strong as ARP stuff. We've seen lots of examples of bad manufacturing from those same companies, so I think it's also entirely possible that they could make manufacturing errors and have the bolt circles offset. Now this won't be a problem with the kind of stuff that AutoRnD sells, just beware of the cheap crap.

I didn't say it'd be a lot of extra weight, but less weight and especially less unsprung weight is always better all else being equal.

 

Thanks for the input Black91n/a, it's helpful and appreciated.

Thanks for the entirely useless non-information you cluttered in my thread unicorn.

 

you're very welcome.


he asked for reasons why one might be better, and rather than having any REAL information, you used your imagination to think of reasons why one might possibly be better. note - while rx7club may not agree, this is not REAL information, and has no factual backing.

seriously, cheap ebay spacers are absolutely fine. I've bought the cheapest ones I can find on several occasions, and they've never let me down, never had any problems... at all.

if you want to worry about every little thing you could 'imagine' going wrong, be my guest. but in that case I'd suggest not modifying anything on your car, at all. just please don't spread your 'opinion' around as information, because then people just get confused and believe all kinds of **** thats really not true at all.

 

It is true that they'll be heavier, twice as many studs and nuts along with the need for more metal to support them. People spend hundreds on aluminum nuts to save them mere ounces, so why not go with lighter spacers?

Tons of people use super cheap Mr.Gasket type spacers with no problems, so I don't think having them fly apart it's that likely.

People break studs EVERY DAY, so why is it such a stretch to think that that might be more likely to break on cheap spacers?

There's lots of examples of really crappy manufacturing on cheap knock off parts, so is it such a stretch to think that they might drill the holes off by a little bit? It doesn't take much runout at all to cause a vibration when the speeds start to get up there. With a bolt through spacer that won't be a problem, the studs will center the wheel in the proper place.

 

http://www.fighters-garage.com/rx7.html

 

They only seem to make 5 and 10mm

 

Call them up. I bet they will make 15mm if you want them.

 

Or if you're getting something custom made why not just get a local machine shop to do it for you, it'll probably be cheaper.