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Thread: Irs packages... Thought bubble

  1. #31
    Registered User fantapants's Avatar
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    Cheers that's what I thought but making sure lol

    So current plan a frankendiff

    Mx5 cradle.
    Its f series diff (mate has a good one free)
    Nodded hubs for 114.3

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  2. #32
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    What about nissan gtir? reasonably narrow, has an r180 which is f series size or upgrade to R200.
    Same setup as a subaru wrx. two transverse links and a trailing arm forward. Would be pretty straight forward to fit, I have a friend with one in a starlet rally car, packages nicely with flares

  3. #33
    Registered User fantapants's Avatar
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    Worth considering for sure. Only issue for me would finding one I think. Not a common car at all here in Tas...

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  4. #34
    Defective Faux Forg's Avatar
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    Quote Originally Posted by fantapants View Post
    I've had a chat with my old boss about rewelding and redrilling and he is confidant we can do it easily enough. So I'll probably go that way. Is there something special about the whole for the spline to bed into or just a sligty smaller size jammed the fuck ? Lol

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    I think the problem with re-drilling to a bigger PCD is that there won't be enough material to support the stud. Looking at the pictures online, moving each stud ~7mm out would put it real close to breaking through.

    Could you run spacers to convert the stud pattern?

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  5. #35
    Registered User fantapants's Avatar
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    Yeah fuck you are right.

    Just had a quick Google. Seems rx8 rear hubs are identical but 5x114.3
    Would have the right diameter but would have the reinforcements on the back in the wrong place...


    Spacers I really don't want to run. I don't want the rear track any wider than it is currently. Already it's near 3 inchs a side wider...

    So to compensate I would have to pull and extra 40mm out of the centre for a total of 140mm (doable) to accommodate some spacers thick enoub to run pcd changes lol.

    Hmmmmmm still drawing board...

    Thanks for al the advice and criticisms guys

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  6. #36
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  7. #37
    What's that whooshing? Aaron's Avatar
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    Irs packages... Thought bubble

    Thinking back to your hub problem.

    It may be entirely possible that some other hub could fit. Mazda was/is a lot like Nissan at the level of interchangeability - just fewer people know about it all.

    Pretty sure early (like 1983) FWD 626 and FWD 323 were 4x114.3 - although some where in Mazda's history 4x110 was also used!

    The later 4x100 and 5x114.3 setups can be swapped into place of the 4x114.3 I think (at least some vague memory exists about it)...

    Could be worth a wrecker crawl - get a 4x100 323 (89+) hub and an early 626 hub and compare.

    You may be able to bastardise CVs etc to make shafts work as well...
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  8. #38
    anyone? MRMOPARMAN's Avatar
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    Looked into e36 bmw rear ends? They are reasonably compact, easy to mod for different bmw diffs, wide variety of ratios, lsds easy to get and come with good brakes from factory.
    Can pick up a whole car for under $500 these days on the main land.

    And i mean coupe/sedan rear.. not hatchback (they are e30 style)
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  9. #39
    Registered User fantapants's Avatar
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    Have not considered this at all. But very good suggestion. I'll have a look later.

    Currently I'm stoned out of my fucking mind trying to deal with being stabbed at the hospital lol.

    How would modifying bolt patterns go ? And shrinking the housing for smaller track ?

    Thanks for th continued advice lads.

    I'm committed. The car will go

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  10. #40
    Registered User fantapants's Avatar
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    On the rotisserie. Later this week if all goes well. I'll spend the time between now and fitting the cradle doing stitch welding of the whole car to give her a bit of a birthday.

    I've got a basic plan for how to modify the cradle to minimise cutting of the floor and chasis.


    I did have a question for those playing at home. If one was to remake the cradle in tube, how thick would the tube be ?

    I'm thinking 38mm 1.6mm. I know this is thin. Roll cage tubing is usually 2.4. But I figure roll cage is designed to be structurally significant AND add safety from ingress in an accident. The cradle needs no added strength to compensate for sapplings.

    So 38 x 1.6 mild - would this be simply too light a gauge for the loads of a suspension cradle ?

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  11. #41
    What's that whooshing? Aaron's Avatar
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    Look up what people are doing to run IRS in Clubbies too.

    They generally use a combo of OEM and bespoke bits like arms and diff cradles
    ---
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  12. #42
    Registered User fantapants's Avatar
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    Yeah have seen a bunch of those guys stuff. Ranges from awesome to cringeworthy lol

    Most seem keen on the mx5 rear end. And I think the mx5 would be great. But it's a lot of mixing and matching to sort the details

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  13. #43
    free hugs! Paddington's Avatar
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    Also subscribed. I have a Mazda 1300 widebody that I plan to transplant an entire MX5 driveline and front setup into.

    I think your MX-5 rear cradle idea is sound, I'd just get custom 4x114.3 hubs made. Surely someone in Tas could make you some (yes it would cost a fortune but then you'd get to run your cool wheels).
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  14. #44
    Registered User fantapants's Avatar
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    Yeah I hear you. But like a lot of things this is being done as a very cheap idea. Nissan stuff is redicukousky cheap.

    And easy to find here. Mx5 is a lot more. And harder to find ...

    I know it sound stupid but I simply don't have the money to spend. If I can save a hundred dollars lol that's like 6weeks of actual saving...

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  15. #45
    free hugs! Paddington's Avatar
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    Yep, know the feeling. arse hanging out of pants with competing interests/hobbies.

    I've been trying to find an 1.8 crashed MX5 for about two years, but I keep getting out manoeuvred by wreckers snapping them up.
    Quote Originally Posted by Stix Z
    i'm upset i lost that video of that aboriginal woman taking a dump on a train that was on youtube
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  16. #46
    Registered User fantapants's Avatar
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    I know a lot of people are against the irs. I also understand why. But 2 things keep me committed to the idea.

    Cost. A tidy strong and neat set up in live axle will approach 1500 to 2g once I have done overhauls, got the right ratio, right lsd etc etc a complete s14/s15 rear end with 4.3 and nismo style plate lsd etc etc. Is under a grand to my door. Now if I was paying someone to do this obviously it would be retarded expensive. But it's only my time and energy. And that's free. so if I can save half the price ...

    Second is simply wanting a challenge and wanting Leo to someday see that you can do crazy Shit everyone said not to do lol. Silly, but it's important to me that this car, as a legacy for Leo, has my fingerprints on as much as possible.

    So I'm committed in some sense lol. Still need to raise the coin to buy the cradle. S13 is cheapest, but also the worst of the lot in terms of anti squat. I'm not really up on anti squat lol but from what I can figure out it is to do with grip on power out of corners ? Apparently s14 and s15 are the same and have much better anti squat characteristics. But I THINK this can be combatted by the slant of the cradle for to aft ? By using small slip washhers to raise or lower the effective tilt of the cradle... ? anyone got any advice on this lol ?

    Also looking at the idea of remaking the cradle to limit the amount of cutting to the car so that the cradle and the suspension sit deep in the car to asssist with roll centres.

    So in that regards. What's people's thoughts on using 38mm 1.6 mild tube for the cradle. I'd weld pads on for the mounting of the arm mounts.

    I can get preformed bends for this material. I can't afford a decent bender of any sort. I'm trying to work it out in my head and I can't imagine the suspension would introduce enough force to tear the metal of a 1.6 tube ? The cradle will be rubber or poly mounted as will most if not all the arms. So no massive impact forces will be transmitted directly to the chassis. So the frame will be cushioned somewhat from sharp shocks. Just after peoples thoughts...

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  17. #47
    Registered User fantapants's Avatar
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    Hey guys.

    So I have come to a fairly commited decision about going irs.

    Plan for the moment is Nissan rear end.

    Purely as a easiest outcome solution. I think an mx5 rear would be easier to fit the cradle. But it had issuies with getting the right stud pattern. Certainly not insurmountable. But a little too difficult/expensive for a first crack.

    My big question for those playing at home who know such things

    The s13 rear cradle is as far as I can determine identical to r32 and all other cradles of the early 90s bar mounting width? I'm ignoring mount width ad the cradle will be reduced in width to match the corolla rear diff width of 1410

    The r33 r34 s14 s15 and other associated derivitives all have "improved anti squat" and as far as I can see this involves the front lca mount about 20mm lower than the early ones.

    Is there anything else you guys know ? That's the only firm bit I have been able to pinpoint.

    Everything else is simply "s14 is heaps better because...."

    I need to sit down and see which of the cradles offers the best options for diff selection. Wanting a 4.3 and plate lsd option.

    I'm really eager to get cracking

    First step is the rotisserie. Was hoping to get it done this week but forgot I have chemo lol. So will be a next week job me thinks.

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  18. #48
    Registered User MartyRX2's Avatar
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    Watching with interest. Have you seen the Maddat 1200 ute that got converted to IRS? Might be worth giving them a call.


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  19. #49
    Registered User fantapants's Avatar
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    Have seen half a dozen Darwin urea and 1200s with varying setups.

    Most opt for mx5 in the Ute as it fits stupid easy really.

    I would really like to do mx5 but I'm shy of the details getting sorted and getting swamped.

    Sounds stupid I know to be worrying about details like pcd when embarking on a irs conversion. But details are what swamp me.

    The nissan bum has the right pcd, a simple disc brake setup, parts are literally lying in the road lol and the setup isn't "horrible"

    I would call people but to be honest with my pace of work it's going to be a long time in coming so I'd basically be wasting people's time lol

    Unless someone has a rear cradle to donate to the cause lol

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  20. #50
    BLING BLING PLAYA's Avatar
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    Mad dat 1200 uses like a narrowed up s13 cradle pretty sure, he just did another one when I pulled past other day.
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  21. #51
    Registered User fantapants's Avatar
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    Yeah sorry I wasn't very clear lol. I was answering my own question in my head as much as anything lol.

    The narrowing of the cradle I've seen with mad dat is the way I planned to do things also, maybe with a twist once I see how things fit in the ke70

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  22. #52
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    s13 whilst not the best setup, is stupid cheap. I got s13 rearcut for $250 (a few years ago mind you) & it turned out to have a nismo lsd in it too!!
    I figured out with an auto engineer how to narrow it ~100mm so that he was happy that it still had its structural integrity (very important if you are going to engineer the car). This is to go into my ke25 - which has now been in storage just over 2 years due to us selling the house & moving. (do have the jig & subframe here though)
    try & get a s13 rather than r32, as the r32 one will have that stupid attessa rear wheel steer thing on it.
    & yes changing angle of lower control arm basically resolves the anti-squat issue.

    fyi - http://www.rollaclub.com/board/topic...e-irs-project/

    T

  23. #53
    Registered User fantapants's Avatar
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    Quote Originally Posted by T View Post
    s13 whilst not the best setup, is stupid cheap. I got s13 rearcut for $250 (a few years ago mind you) & it turned out to have a nismo lsd in it too!!
    I figured out with an auto engineer how to narrow it ~100mm so that he was happy that it still had its structural integrity (very important if you are going to engineer the car). This is to go into my ke25 - which has now been in storage just over 2 years due to us selling the house & moving. (do have the jig & subframe here though)
    try & get a s13 rather than r32, as the r32 one will have that stupid attessa rear wheel steer thing on it.
    & yes changing angle of lower control arm basically resolves the anti-squat issue.

    fyi - http://www.rollaclub.com/board/topic...e-irs-project/

    T
    Fuck. You. Cunt.

    I have read your thread so many times in the last few weeks and every time I'm as dissapointed as ever when it ends with both cars in storage

    Finish the fucking things!!!!

    But yes yours was one of the original "i recon I can do it " moments for this little project.

    Any more details or stuff you can offer would be appreciated ...

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  24. #54
    Genius T's Avatar
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    such flattering comments will get you no-where.....

    so what do you want to know? I've been working on the tr7 when I have time, as there's less work to get that to painting stage than the ke20/25 or the mini. Will eventually have to bring the corollas home soon as I may have sold the land where the cars are kept.......(not my land, just have come across a guy who wants to buy 6acres of industrial land in our area)

    The subframe is in the shed, as is the jig. happy to assist where I can. I basically work on a $0.25 budget on my projects whenever I can, so we should see eye-to-eye on most things.

  25. #55
    Registered User TRD-MX62's Avatar
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  26. #56
    Registered User PXL265's Avatar
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    If you are going the s14 route, they have 5 stud for the stuff sold here and the base models sometimes got 4 stud in JDM land.

    I'm in Brisbane, but if the good of PF can get the stuff to Tassie, I have a full set of 4 stud hubs, standard arms and links as I went fully adjustable rose jointed arms in mine and standard diff out of an early S14, basically all but the cradle that can be donated to the cause as it is only taking up room in my garage.

    I will be driving from Brisbane to Sydney for Christmas so can get the stuff part way down the east coast if that helps and you want it.

  27. #57
    Registered User trdee's Avatar
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    hmm might need to read up on this s13 rear end stuff if it's that cheap to pick up and can be made decently narrow.
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  28. #58
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    Quote Originally Posted by TRD-MX62 View Post
    What the fuck is that?!

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  29. #59
    Registered User fantapants's Avatar
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    Hahaha some Mercedes thing from the "just rolled into the shop" thread.

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  30. #60
    Registered User fantapants's Avatar
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    Quote Originally Posted by PXL265 View Post
    If you are going the s14 route, they have 5 stud for the stuff sold here and the base models sometimes got 4 stud in JDM land.

    I'm in Brisbane, but if the good of PF can get the stuff to Tassie, I have a full set of 4 stud hubs, standard arms and links as I went fully adjustable rose jointed arms in mine and standard diff out of an early S14, basically all but the cradle that can be donated to the cause as it is only taking up room in my garage.

    I will be driving from Brisbane to Sydney for Christmas so can get the stuff part way down the east coast if that helps and you want it.
    Pm'd mate

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