R31 5 stud conversion

[floody]

I see a fair few HR31's on japanese sites, and Nismoid's GTS-R, which have been converted to a 5x114.3 stud pattern, opening up the previously non existent wheel choice considerably.

I have an aussie 31, and I know how to convert the rear axle, but I was just wondering if anybody knows what hubs are used up front?

I have heard perhaps Z31 turbo 300zx hubs may be the go? But I don't want to buy a set and find out they don't fit! so does anyone have some info that could shed some light on this?

Also, on a related topic, I am looking at a BTR hydratrak diff conversion from a Falcon longreach ute, Is it possible to have axles shortened and retain the splines on the centre end? I mean not have to recut the splines? Apparently the BTR axles have a strange setup with an odd spline or 2 different one left to right or something. I'd like to fit the Hydratrak centre and axles into the R31 casing, and retain the 5x114.3 stud pattern and bigger brakes from the falcon. Its just an idea at this stage, but it seems like a better option than a worn out and recoed old silhouette LSD.

cheers,

floody

[Guest outlawskyline]

I wouldnt have a clue on the front hubs, but i know that 17's are hard 2 find 4 the r31, i have a set that i got from performance wheels, they are called 'Lotus', that was the only 17' wheel i could get. The diff sounds like a good idea 2, keep me posted if u get it done.

[R31Nismoid]

you leave us?

it's all back over at R31 floody.

http://www.r31skylineclub.com/forum/index....g35132#msg35132

http://www.r31skylineclub.com/forum/index....g35094#msg35094

http://www.r31skylineclub.com/forum/index....g19835#msg19835

http://www.r31skylineclub.com/forum/index....g15487#msg15487

and THAT is just a FEW of the ones i found..

cheers mate.

ash

[floody]

Nah, still there!

Just thought I'd widen my search a bit!

outlawskyline, thanks for the heads up, but I don't want or need 17s, 16x7/8" Is what I'm going for. Better ride and possibly better handling than the lower profiles, I mean thats already a +2 sizing on stock.

Though I'm partial to 18" R34 GT-R rims, but then, who isn't! I'd only use them on the street though, would be a step backwards for the track, I'd be tipping.

cheers,

floody

[slip]

Well, what about 2nd hand wheels from jp. Silvia + GTS wheels are the same stud pattern.

[HRthirtyone]

why dont you just use those fat spacers that bolt onto your hubs called "blocks" i think?? you can then run a silvia/180sx offset and stud pattern...

[SKY031]

Ash, those links are broken

An Error Has Occurred!

The board field does not accept / in the query string

[R31Nismoid]

????

WTF is wrong with them!!

GGRR....

just use the search then.

That how i found the all. Took a few secs.

[Guest outlawskyline]

U also know that it is a load of shit that u cant go 2" bigger than standard, go to the RTA site and it will tell u that the rim height cant exceed 15mm on your stock rim.

[floody]

Originally posted by HRthirtyone

why dont you just use those fat spacers that bolt onto your hubs called "blocks" i think?? you can then run a silvia/180sx offset and stud pattern...

Where do I get them? are they legal? and what do you mean "run a silvia/180sx stud pattern", the stud pattern is identical on a stock skyline, 4x114.3. Or do they change your stud pattern to 5x114.3?

Slip, what about offset problems? Saliva/180sx are about +35 from memory, R31 is about +25. Do you know of anyone runing silvia/180 fitment rims on their 'line? do they sit inwards or fill out the guards properly?Would the wider rims (e.g 7/8") make up for the offset problem? I don't want to be losing track width. I want 16s for handling not looks. My current rims are 15x6" and thats not great for tyre choice, considering max width is about a 205 on those rims, and the sidewall height is annoying at a 65 profile.

cheers,

floody

[kryz]

R31s are poo anyway.

Wait...

that hurt.

[kwazza11]

use z31 turbo hubs up front and import 31 struts. then get ya rear axles redrilled to the same stud pattern and use ford rear brakes from memory thier the same offset as the 31 rears, just needa change the caliper mount.

i was gunna do this but ran outta money.

although when you add up all the additional costs unless you can get 18s for 200 bucks it's shitloads more expensive than just importing a set! but you get bigger brakes front and rear.

[slip]

floody - Saliva/180sx are about +35 from memory, R31 is about +25. Bollocks.

Std S13 wheels have SLIGHTLY less offset than std silo wheels. I say this because with the same set of 215/60 R15 tyres, they rubbed on the front struts when on the s13 wheels.

33 offset at the absolute minimum with 16's. Thats what I have, I want more. 38 would be better.

[floody]

Slip, that would mean the S13 rims had a higher positive offset(which I was saying)- that is that the distance from the wheel centre to the hub face is closer to the front of the rim, hence they sit further inwards and rub the strut. Offset is measured from the centre line of the rim to the back of the hub face, not from the front edge of the rim to the hub face. A numerically lower offset number will sit the wheel further out, whereas a higher number will sit the rim in closer.

So you have +33 offset rims, what width? 16" ? what size tyres? What car are they off originally? how well do they fill the guards- I want to fill my wheelarches up, and get as much track width as is practical. My 15x6" rims with about a 30 offset just sit too close in at the back, like no worse than stock wheels, but yeah.

cheers,

floody

[hako]

s13 rims look shithouse on any 31

do a search and u will see

offset is way off - the narrow track look is not cool

and not nice for grip either

[slip]

yeh s13 stockos are horrible.

bugger have i got the offset thing the wrong way around

16x7 front, 16x8 rear. 33 offset. I would want them to sit at least 5mm further out, possibly 10mm (just from memory, and i would just roll the guards a bit to make em fit). They are satisfactory, but not perfect. I want 8's on the front as well, but theres not a whole lot of room in there. Can be done. Thats for later on.

205/55 R16 on the front 7"

225/50 R16 on the back 8"

Would almost got 215/225 or 215/235 as next set.

No idea what they are off.

The wheels themselves made a noticeable handling improvement. less body roll, more stable.

[floody]

Cool! Yeah, Slip, if you want your wheels 10mm further out, you will need something with an offset more like +23mm as opposed to +33. lower offset means further out. Spacers would achieve what you want at the moment....but they are definitely dodgy.

I was thinking 16x7" or 16x8" wheels for my car. Everyone is obsessed with 17"/18" wheels on their R31's which is silly, they would be a step backwards. My local speedshop guy wants to sell me buddy club p1's , 16x8.5" , at $400 each though....Wheres my money tree :|

cheers,

floody

[slip]

spacers are not ALL dodgy.

i have very non dodgy ones on my car, which are made by a guy who does v8 supercar wheels, and is fully engineered.

16x8 perfect i reckon. 235's or 225's all round.

I could cop 16x7, but they would have to sit out nice and wide.

Maybe if you got a good rappore with an importer you could tell them the specs you need and get them to source some 2nd handers in JP.

[PHaT MR30]

I have 17X7 +38 offset 4X114.3 wheels on my R30 skyline (which is same as r31 in offsets)

have no trouble, there is about 7-8mm clearance between strut and tyre at the front (205/40/17). and they actually sit in the guards a bit too much (nothing a 10mm spacer wont fix).

regarding wheel spacers, to a transport inspector they are a defect, but in an engineering point of view they are fine, i spoke with the guy that engineers major modified vehicles and he said they are fine if they are made right.

I had some laser cut to fit on one of my cars and had no trouble with them

on the topic of r31s have you considered an IRS rear end conversion?

[hako]

i was under the impression an irs conversion was near impossible, if not there would some major fabrication required, the difference between import and aus r31s in the rear end is substantial.