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Thread: Garage Takai IPRA AE86 (56k die)

  1. #91
    Bannered takai's Avatar
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    On the AE86 the lower 4link arms are shorter than ideal, and as such the easiest method of fixing the pinion angle on a lowered car is to simply extend the mounting points downwards 50mm or so.

    Interestinly i was reading through the CAMS manual (here) today trying to find how far the maximum i can relocate them is, and found that a few of the other requirements for IPRA have changed during my off time. Of particular interest is there used to be a clause that you couldnt move the suspension pickup points by more than 50mm, which i cant find anymore. If thats the case then the better method than using traction brackets is to simply go to an equal length 4link setup.

    Also, clause 18.5 seems to imply that i can replace my stock bumper with a fibreglass one.

    The only thing im trying to figure out is with the lack of a heading for 18 im wondering whether its part of the Late Model regs rather than the regs as a whole.

    Edit: seems that 18.5 applies to Late model only:
    17.1 The prescriptions of Articles 17.2 – 17.6 and 18.1 – 18.6 shall apply only to vehicles which comply with the
    definition of a Late Model Vehicle (see Article 1.15).
    Last edited by takai; 23-07-09 at 01:47 PM.
    Chris
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  2. #92
    Unregistered User Permit Roadsailing's Avatar
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    Quote Originally Posted by HoonBoy View Post
    And they are for???
    so-called "traction brackets", they lower the mounting points of the lower diff links.

    I have some TRD cheater mounts, which need to be welded on, from memory you should be able to extend the lower mounts by welding on to them pretty easily, i never liked the idea of bolt on traction brackets as to me it just seem like more bolts to come loose.

  3. #93
    CNGAF rowdytoot's Avatar
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    Quote Originally Posted by takai View Post
    Cant really move the extinguisher and still have it in easy reaching distance (thats one of hte CAMS regs right?). The only place i can mount it other than there is right infront of the seat, and that causes issues on interstate tracks.
    nope another furphy propagated by scrutes with NFI Mine are mounted to where the rear seat was. you're going to have to get out of the car anyway, so having it within reach is really not helpful!

    Additionally experience says that if their is a decent fire a 1 or 2 kg powder extinguisher will be all but useless, and if there is a decent fire, you're only priority should be getting the fuck out of the car, and away from it hen letting the fire marshalls handle it (at a circuit)

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  4. #94
    Bannered takai's Avatar
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    Quote Originally Posted by shinybluesteel View Post
    I have some TRD cheater mounts, which need to be welded on, from memory you should be able to extend the lower mounts by welding on to them pretty easily, i never liked the idea of bolt on traction brackets as to me it just seem like more bolts to come loose.
    Yeah, im debating whether to just weld on the brackets, or to make bolt ons
    I have to pull the diff out anyway to get the pumpkin out so that i can get it swapped over to the 4.77 center, so maybe this is a good point to weld them on.

    Quote Originally Posted by rowdytoot View Post
    nope another furphy propagated by scrutes with NFI Mine are mounted to where the rear seat was. you're going to have to get out of the car anyway, so having it within reach is really not helpful!

    Additionally experience says that if their is a decent fire a 1 or 2 kg powder extinguisher will be all but useless, and if there is a decent fire, you're only priority should be getting the fuck out of the car, and away from it hen letting the fire marshalls handle it (at a circuit)
    Yeah, im of the same opinion, but after being in a rally accident where the harness jammed im now of the opinion that i want at least a 1kg within reach so that if im jammed in and there is fire around my legs i can keep myself non-flaming for a bit longer.
    Chris
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  5. #95
    Bannered takai's Avatar
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    While i think of it, this info is for Alan (morerevsm3) when he sees the thread. All the cage strengthening, linking to the front strut towers, wheel sizes, tyres sizes and suspension stuff which we were talking about on Monday are all only eligible for Late Model, which means for your M3 you are ok, but for the AE86 which is an EM i cant link to the strut towers etc.
    Chris
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  6. #96
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    Quote Originally Posted by rowdytoot View Post
    nope another furphy propagated by scrutes with NFI Mine are mounted to where the rear seat was. you're going to have to get out of the car anyway, so having it within reach is really not helpful!

    Additionally experience says that if their is a decent fire a 1 or 2 kg powder extinguisher will be all but useless, and if there is a decent fire, you're only priority should be getting the fuck out of the car, and away from it hen letting the fire marshalls handle it (at a circuit)
    Look how many top level cars have been destroyed in fires despite having the latest firebottles fitted. A fuel fire in a race car is never going to be put out with 2kg or pwder, 20kg might do it but I doubt it. Car goes up, get the fuck out of there!

  7. #97
    This space left blank Ben Wilson's Avatar
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    Quote Originally Posted by takai View Post
    Yeah, im of the same opinion, but after being in a rally accident where the harness jammed im now of the opinion that i want at least a 1kg within reach so that if im jammed in and there is fire around my legs i can keep myself non-flaming for a bit longer.
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  8. #98
    Bannered takai's Avatar
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    Quote Originally Posted by Ben Wilson View Post
    Yup, got one now.
    Chris
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  9. #99
    Bannered takai's Avatar
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    Over the last little while ive been doing some thinking about brake upgrades. Im not sure if ill do the 294mm disc option, but rather im thinking about a 280x30mm option, for the extra heat dissipation that 30mm thickness offers.

    The setup im contemplating uses an S15 rotor which is 280x30mm, and will use the RX7 calipers i have but widened to support those rotors.
    Now one of the advantages of this is that i can test the setup using S13 SR20 rotors which are 280x22mm and dont need caliper bridges to shove in a caliper to test. As such, here they are:


    The central hole there will need to be enlarged from 67mm to 74mm, but that can be done on most lathes as they are only 280mm diameter, rather than the issues im having with my 308mm diameter rotors not fitting on several lathes ive tried.

    The wheel in question is the 14x7 which im currently running, just mocked up for giggles. I dont really think ill ever be able to run those, but i thought i might try anyway. If i do run them it will be with 0.0000001mm of clearance (approximately).

    Thoughts/suggestions etc?
    Chris
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  10. #100
    Problem? sssgtr's Avatar
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    Go to 15's for the piece of mind mate. I have the same OD rotor on my U12 with the nissan 4 pot's, and apart from the fact that the factory 14" alloys don't clear the wheel spokes, the caliper rubs on the ID of the wheel.

  11. #101
    Bannered takai's Avatar
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    Yeah, i think i needed a whole lot more of italics through there. Find it remarkably hard to find 15x7s in a decent offset atm, most are +20 or so, or even +40.

    Im wondering if ill have to resign myself to using bolton spacers at the front to clear some wheels. Or if ill end up doing the "JDM yo!" look with mismatched wheels front and rear.
    Chris
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  12. #102
    Improved Production Racer Datman's Avatar
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    Brackets on Diff

    Brackets on the diff are free, so you can change the brackets which hold the trailing arms. I have attached a pic of my car which you can see to sections hanging down from the diff to locate the lower trailing arms. Mine have 5 positions in which I can set the lower arms, and it definately makes a difference.

    As for the relocation of suspension pick up points by 50mm....I think you will find that only relates to the front pivot point of the lower control arm, not the rear.

    With the rear end, you must run the standard rear arms, however you can add additional arms. Some people in the past have added additional upper arms parralell with the lower arms, and rendered the standard upper arms useless by using foam or other soft materials as the "bushing". Then adding a watts link or panhard bar to control lateral movement.
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  13. #103
    Bannered takai's Avatar
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    Yeah, im unable to get a clear ruling out of CAMS as to the relocation of suspension pickup points. Either way though i mocked up my pinion shift and i need less than 50mm to get it hanging 10* nose down, so ill set it up with 4 or 5 positions to choose from and go from there.

    The current one i have going is whether i can use mismatched wheels, 15s at the front and 14s at the rear. Only started thinking about that one this morning, and havnt consulted the manual yet.

    Edit: seems that i can run different sized wheels front and rear. Looks and will be boong spec, but gets me out of an annoying situation of having a lack of 15x7s.
    Last edited by takai; 02-09-09 at 11:27 AM.
    Chris
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  14. #104
    Corolling along Taylz's Avatar
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    Dont forget that the only meaningful width A048 in a 14" is the 195...
    Surely 15s all round would be a better proposition, even if it means having to go to some form of spacer on the front. Performance Superlites and Challengers are available with a lower offset that should be more suitable.
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  15. #105
    Opens profi's Avatar
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    Whats the stud pattern?

    All the top running sports sedans have 17s on the front and 16s on the rear.

  16. #106
    Bannered takai's Avatar
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    4x114.3, we are restricted in tyre sizes though. Can be a maximum of 50 profile.

    In 14s i can use 195/60/14, and 15s 195/50/15.
    Chris
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  17. #107
    Improved Production Racer Datman's Avatar
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    You could also get some Panasport wheels. I used to sell them, and run them on my car. Available in a range of offsets.

    The importer's name is Steve Burns (Meroo Racing) based on the south coast of NSW. He can be contacted on 02 4422 1364.

    He will be able to supply wheels for you, and they will be lighter than most options available to you.

    You should have no problems running 15's all round. Justin McClintock in Sydney runs 15's on his IPRA Sprinter.
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  18. #108
    Bannered takai's Avatar
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    Yeah, no problems in actually running 15s all around. More a matter of finding 15s which dont cost the earth. Im running on a slightly tighter budget these days and cant splash $900 on a set of wheels and then follow it up with $1200 on tyres.

    Im probably going to pick up a second hand pair of 15x7s for $150-200 and tyre them and use my exisitng 14s which have a few meetings left in them on the rear before going to full 15s.
    Chris
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  19. #109
    Registered User charged's Avatar
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    Quote Originally Posted by takai View Post
    Yeah, i think i needed a whole lot more of italics through there. Find it remarkably hard to find 15x7s in a decent offset atm, most are +20 or so, or even +40.

    Im wondering if ill have to resign myself to using bolton spacers at the front to clear some wheels. Or if ill end up doing the "JDM yo!" look with mismatched wheels front and rear.
    Takai at the next meeting talk to Ken who runs the RX7, he bought 6 new challengers in a decent offset direct from Performace wheels for under 180 a rim.

    Adam Allans sportmax wheels were cheap also. http://www.infiniteautosports.com.au/?page_id=77
    SA IPRA cars 15, 51, 77 and 25
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  20. #110
    Bannered takai's Avatar
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    Infinite auto dont have any Sportsmaxes anymore.
    Chris
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  21. #111
    Registered User Instigator's Avatar
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    Just read the whole thread. Love it!

    Are you racing in NSW any time soon?

  22. #112
    Bannered takai's Avatar
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    Solved one problem, and found some nice Simmons V4s for a very good price in 15x6.5:



    Now just waiting on my caliper spacers from a guy on the IPRA forum (hopefully he delivers...) and i need to machine out the center hole on my discs and we are good to go to start building the new brake upgrade.
    Chris
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    I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself. - D.H.Lawrence

  23. #113
    Bannered takai's Avatar
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    Caliper spacers arrived today, looks like ill have to go and get busy with a lathe and get a couple of rebuild kits for RX7 calipers.
    Chris
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    The new nugget
    I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself. - D.H.Lawrence

  24. #114
    Registered User charged's Avatar
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    Chris,

    Will it be ready for the supertruck round, looks like IP will be added to the program, mine should be back together by then hopefullyand will use the race meet as a test for the new box, engine brakes, tyres etc. Entry looks to be around 200 for 2 days racing, much cheaper than a prac day.

    http://www.mallala.com/321go/events.html
    SA IPRA cars 15, 51, 77 and 25
    (Sharperto Racing)


    http://www.iprasa.mx.com.au/

  25. #115
    Registered User Dave75's Avatar
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    Quote Originally Posted by charged View Post
    Chris,

    Will it be ready for the supertruck round, looks like IP will be added to the program, mine should be back together by then hopefullyand will use the race meet as a test for the new box, engine brakes, tyres etc. Entry looks to be around 200 for 2 days racing, much cheaper than a prac day.

    http://www.mallala.com/321go/events.html
    $330 for 4 races for each class .[6 classes]
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    Last edited by Dave75; 22-09-09 at 11:11 PM.
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  26. #116
    Bannered takai's Avatar
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    Yeah, just got the entry forms. Doesnt look likely for now, have a really hectic October and its getting worse.
    Chris
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    I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself. - D.H.Lawrence

  27. #117
    heavy tilt meggala's Avatar
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    great read
    check out my web site
    http://meggala.com

    yeah I tow cars and other things



    .

  28. #118
    I got you Pepe Le Bitch RESON8's Avatar
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    Quote Originally Posted by takai View Post

    Caliper spacers arrived today, looks like ill have to go and get busy with a lathe and get a couple of rebuild kits for RX7 calipers.
    If you are using FD calipers hopefully he sent you long enough pins, mine were too short but replacements are on the way.
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  29. #119
    Bannered takai's Avatar
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    Ill have to check, but if in doubt i have a few spare sets of GTR caliper pins.
    Chris
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    I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself. - D.H.Lawrence

  30. #120
    Bannered takai's Avatar
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    Just a quick update, i got around to machining out my discs the other day, which was all nice and easy, and then bolted them up to the hub and mocked it all up on the bench on Saturday.

    Firstly, the caliper with spacers:


    Then all mocked up on the strut:


    I love compressed air for many things. Including operating rattleguns to lock up hub bearings so the wheel doesnt spin, and pushing pistons out of calipers so that they the pads clamp on a disc

    Not going to be an easy caliper adaptor to make though:


    Back there near the disc is the caliper adaptor mount, and almost 35mm away is the caliper mounting face:


    Ohwell, should be a good challenge.

    In other news i popped a wheel apart too while i was sick, should be easy enough to clean up and reassemble without disturbing the wheel halves seal:


    Thats about it, as i said, not looking forward to making that caliper bracket.
    Chris
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    I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself. - D.H.Lawrence

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