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R31 5 stud conversion

floody
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floody Experienced

floody

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Nah, IRS would be a step backwards from what I have seen of 80's nissans.

Live axles can definitely be made to handle well enough, if not even better than Nissan's dodgy trailing arm setup. I am trying to figure a way of offset mounting the rear arms now to get the roll centres right when it goes a bit lower too, see how that goes.

I am just interested in a five stud conversion. I also found out R32 GT-R rims are +30, which is pretty much ideal with the 16x8" width.

I got offered a reasonable price on Buddy Club P1s so I will probably end up just saving my pennies and getting those, rather than spending big on the 5 studs, unless I can find out EXACTLY what needs to be done.

For now, because nobody knows how to do the 5 stud thing with any certainty, I reckon I will haunt my local jap importer for some 16" multifits in a reasonable offset.

cheers,

floody

floody Experienced

floody

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True thing Nismoid, I'm just used to the bizarre handling of the old datsun IRS at 9/10ths you know, all that tucking under and huge camber change.....I thought the HR31s were basically the same design?

Ok, maybe "step backwards" is a little over the top, I just reckon there is plenty of development left in the live axle. It will never be quite as good on a REALLY bumpy road, and it will always mean more unsprung weight but there are plusses like constant camber and contact patch etc. And I think there is stuff all in it for circuit use anyway.

A proper double wishbone IRS would definitely be step forward, not going to happen though.

I haven't driven a HR31, so I'm just guessing at how they handle form all the other old nissans I've been in.

So I'm probably wrong :cheers:

cheers,

floody

PHaT MR30 Grand Master

PHaT MR30

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Posted

Well if you guys think its so hard, its not

i have a guy in another forum with a bluebird, which has live axle just as the skyline does.

he converted the rear end to irs in a weekend, using an R30 skyline bum.

he admitted he didn't know shit but just followed a guide placed up by another user it required a tiny bit of welding and mainly bolts through the floor pan

and the 80s skyline rear ends are not shit, well admittedly R30s are still faily basic but r31s change a fair degree much more like the wishbone type in r32s

by the way anyone wanna buy my wheels?

floody Experienced

floody

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For the money it would cost, the only benefit I see would be getting an R200 diff and LSD, rather than the crappy BW diff in the aussie R31. But really, it wouldn't be worth it. The amount of work and stuffing around, its not worth it, be better off buying an import instead.

There are plenty of things to do with the rigid axle rear end to make it handle, its just nobody has really done them!

AE86 is a live axle, so are V8 supercars etc.

cheers,

floody

hako Enthusiast

hako

Posted
Posted

i wouldnt believe some dude in a forum somewhere with a bluebird tho

if it was easy as u say it woulda been done already

bluebirds were irs in european markets, so they probably would have bolt holes.

gibson motorsport converted a bluebird to irs for group c racing here in oz, but everything was custom fabricated.

PHaT MR30 Grand Master

PHaT MR30

Posted
Posted

Well seeing as i am the owner of that forum and i have personally seen the car and there are pics on the net, i can gurantee its piss easy, a few guys local to me are carring it out too

the gibson bluey was based on the same rear end designed, but heavily modified for racing

i suppose its too hard to bother in the R31

Originally posted by hako

i wouldnt believe some dude in a forum somewhere with a bluebird tho  

if it was easy as u say it woulda been done already  

bluebirds were irs in european markets, so they probably would have bolt holes.

gibson motorsport converted a bluebird to irs for group c racing here in oz, but everything was custom fabricated.

floody Experienced

floody

Posted
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Posted
Originally posted by PHaT MR30

Well seeing as i am the owner of that forum and i have personally seen the car and there are pics on the net, i can gurantee its piss easy, a few guys local to me are carring it out too

the gibson bluey was based on the same rear end designed, but heavily modified for racing

i suppose its too hard to bother in the R31

You're wrong bout the Gibson Bluey, have you seen pics of the rear end? its all chromoly tube, rose joints etc etc. The only resemblance it has to the overseas rear end is that its IRS, and its (basically) a trailing arm setup. Beyond that there is almost no factory nissan Bluebird parts in that back end.

I seriously see no point in doing that to a bluebird? What would it achieve?

cheers,

floody

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Originally posted by floody

You're wrong bout the Gibson Bluey, have you seen pics of the rear end? its all chromoly tube, rose joints etc etc. The only resemblance it has to the overseas rear end is that its IRS, and its (basically) a trailing arm setup. Beyond that there is almost no factory nissan Bluebird parts in that back end.

I seriously see no point in doing that to a bluebird? What would it achieve?

cheers,

floody

:bonk: hammered :O

love ya work floody keep on it :)

PHaT MR30 Grand Master

PHaT MR30

Posted
Posted

whats the point? well if you have seen an SR20 powered bluebird you probably would understand (there is 1 or 2 in hobart that i know of), the existing trailing arm setup rips itself away from the floor pan in no time at all. converting to IRS gets rid of this problem, not to mention aides handling.

afaik gibson bluey is 'based' on the IRS rearend, where its from don't really matter cos its the same for any IRS datto of that era. seeing as it was basically a purposes built racer of course its been changed to look nothing like original. it however still retains the rear X-member and pivots roughly from the same points.

im not having a go at anyone either, its just when it comes to bluebird, don't **** with me ! ;)

i guess while your at it visit http://910.cjb.net

that is our website

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