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Thread: Heavyweight challenge - supra time attack?

  1. #31
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    Great stuff but if you havent already purchased your o48s DONT they are dead set RUBBISH.
    Any other R-Spec are far far better.
    Infact o48s are so bad I think they should be banished.

  2. #32
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    ^^^^ Can not agree more, A048 is the worst semi slick around at the moment. Well almost..........

    Agree with hrd too, spend some money on driver training, there are a lot of good ones around. I started with Doug Chappell at QR/Lakeside in the early Timeattack days, and for the little it cost with him I shaved seconds off my lap times. After that I did some time with Paul Stokell, Glenn Seton and finally Nathan Pretty, each one taking time off my lap times to that point. So the order of use is not indicative of their ability to fine tune a driver, its just that each one had a more educated driver to deal with, and to be fair, an improving car.
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  3. #33
    Registered User I'm DJ!'s Avatar
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    ^^^cheers. New look with catch can sorted and new intake
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  4. #34
    Registered User I'm DJ!'s Avatar
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    Fuckity fuck.

    So tune didn't go so well. No compression on number 6. Head off next and see what we've got.

    I'm now more interested in pf opinions if it is bottom end as have spent the day on brian crower website..

  5. #35
    Registered User I'm DJ!'s Avatar
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    About to pull the trigger here any comments / things to be careful of?

    Spool 3.4 Stroker kit
    Flow tested port matched cylinder head
    Cams, 272 degrees duration 10mm nominal lift.
    Arp head bolts
    Arp rod bolts
    Billet main caps
    Cometic head gasket
    Performance valve springs and retainers
    Acl racing bearings
    Ross Balancer

    Word from machinist was he did not recommend I waste money on a full port and polish but will flow match the ports and cut valve seats to optimise flow.

    Different schools of thought seem to be on the cams but most believe around 272 degrees of advertised duration and about 10mm of lift is about right.

    Also update oil pump.

    There's not a lot of info I've been able to find on these engines for track use most is drag racing or dyno battles, but this is a torque build, hence the stroker and smallish turbo.

    Clutch is an OS Giken push pull so will repair as needed. What do ppl do with flywheel weight? Any benefits or suggestions?

    Fuel system and ecu is next decision, it already has 1600cc injectors. It has a microtech, safc at the moment.

    Will need to find a good auto electrician to make a custom loom incorporating new Computer ( haltech is the obvious choice) plus digi dash.

    I have already got some new coils too.thanks for reading.

  6. #36
    Registered User Rz's Avatar
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    is the motor you got fucked allready? they dont need anything for track use. nada.

  7. #37
    Registered User Rz's Avatar
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    oh wait, thought this was the gorilla supra thread, apologies if you've already talked about engine stuff.
    annnnd... seems you have.

  8. #38
    Registered User I'm DJ!'s Avatar
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    I think I forgot to update after pulling head, number 6 melted, number 5 badly damaged. Has only ever had 17psi through it with me so who knows prior history, either that or loose injector wire on no. 6 killed it but doesn't explain detonation on number 5....in any case rebuild required

  9. #39
    Brown Cunt MR-PUNANNY's Avatar
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    That sux man. Just bout another OEM 2J.
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  10. #40
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    Quote Originally Posted by 2domn8 View Post
    Take it from me, biggest mistake do not solid mount the rear end. Its not a drag car, having no slack on the subframe will make the car rely on tyres only for grip. Swap that for solid mounting all the suspension arms over the rear end to keep your alignment settings still while cornering.
    err wtf?

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  11. #41
    Registered User hrd's Avatar
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    I'd agree with MR-PUNANNY . just whack another stockie in there and get busy learning to drive it.

    Will probably cop a heap of shit for saying this (I always do when I mention lap times) but 312kw and 1.02.44 at QR Sprint on A048s is not good. My 186rwkw JZA80 with the early small brakes, Tein coilovers and KU36's ran 1:01.4, and that was immediately after someone had an oil-down on the apex of turn 1 so the track was not at its fastest by any means. A 312rwkw Supra with half reasonable suspension and semis should be doing 56s or better IMO. A 3.4 stroker with cams and headwork is only going to make more power and be harder to learn to drive. You've still got an effectively free 6seconds to find in the car without blowing thousands on an engine build which will keep you off the track longer...
    Last edited by hrd; 22-05-12 at 02:01 PM.

  12. #42
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    Agree with the above post. Will hate to compare an animal like a Supra with my little shitter but in getting used to the car the times have been coming down fater when in the lowest boost setting. We still dont run full boost(330kw) yet!!

  13. #43
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    Agreed and appreciate the above ^.

    I could also buy an mx-5, but won't.

    Let's not confuse the issues of becoming a better driver and fixing a broken car into what I want it to be. There's other vehicles I am lucky enough to be able to punt around whilst building this.

    No way I'm putting an unknown bottom end back in it - buy cheap, buy twice. I could also just swap 2 pistons out which would be even cheaper and last forever or not.

    I don't know, it should be able to do a 56sec with 312kw, but looking through natsoft, it doesn't seem that anyone has done this on a similar tune either, or have I missed it? Rz has, I think he has more power though?

    I'm really keen on feedback from anyone who's built a competition 2J and has some results?

  14. #44
    Registered User spiller's Avatar
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    Quote Originally Posted by UZZ31 View Post
    err wtf?
    yeah id also like some clarification of this idea. i would have thought solid subframe = better alignment due to stiff chassis = better handling. or have I got it all wrong?

  15. #45
    Registered User Rz's Avatar
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    i got more than 312rwkw by a long way, but id say fucks me up as far as being consistant, mostly because im shit at judging braking distance, either way too early or bit too late.

  16. #46
    Registered User I'm DJ!'s Avatar
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    ^I'm looking for the less peaky powerband too, even with the old set-up it was either on boost or off boost. In retrospect buying a car with factory twins would have been better, not because of outright power, just flatter torque curve. Now I'm going for both, flatter torque curve with plenty of upside built in.

  17. #47
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    If looking for response wouldn't you only use something like 264s. Look at higher compression say 9-9.5:1 and run a smallish turbo like a GTX3076r with E85 should be fine with say 20psi. Would be on the limit around 350-370rwkw but would be a pretty interesting beast to drive ie nice wide torque band from 3000rpm onwards.

    It's your money at the end of the day but it is a shit load of coin to drop on a power level that could be easily achieved with a stocker & bolt ons. I guess if you got bored changing to a bigger turbo wouldn't be that hard.
    If in doubt power out

  18. #48
    Registered User I'm DJ!'s Avatar
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    ^this bloke's picked up the theme here

  19. #49
    Brown Cunt MR-PUNANNY's Avatar
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    Just to note, Im still on the stock motor, after 4 years, and its running 370rwkw. Even the Cams are stock.

    Im happy with it, its just as quick as my mates T04Z R34 GTR with a fully built motor....which is on its 3rd build....OEM FTW!!!!
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  20. #50
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    I agree with Rona. High compression within reason is your friend (providing your tuner isn't shit). I'd say a GT35 for a 2JZ, but GTX3076R would still be like a fucking tractor.

  21. #51
    Registered User spiller's Avatar
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    I don't understand why you need such a wide power and torque band if it's for track use? Unless top end is something you are sacrificing for the sake of something that is easier to control because it comes on song earlier?

  22. #52
    Registered User I'm DJ!'s Avatar
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    Quote Originally Posted by spiller View Post
    I don't understand why you need such a wide power and torque band if it's for track use? Unless top end is something you are sacrificing for the sake of something that is easier to control because it comes on song earlier?
    Your second question is what I am doing, we will probably not move the factory hardcut much either - predictable mid corner tractor it will be. It leaves easy upside for the future too. (bigger turbo / more boost) And for the same power level as a stocker, less heat, less boost required.

    Turbo is precision dbb 6765, may ditch the quick spool valve though, haven't decided yet. It was on boost ~500rpm earlier than the 35r on my merc with this turbo (about 3200-3400rpm).

    Cr probably around 9:1

  23. #53
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    Dunno nothing about turbos except they sound beautiful....but seems to me that you should just do what you want and not ask too much,your money on your honey! Reading this thread makes me wanna go all boost on my escort,but have absolutely no clue where could i start...might end up destroying something in spectacular fashion but that would be a laugh i suppose....would it? hmmmm....

  24. #54
    "The bitches, are wet" Sketchy's Avatar
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    Just quietly, fuck you jerks making 370rkw and not blowing them up for 20 years.


    Cunts

    If you have to rebuild the motor and you have the dollars, just do it. Get it together, keep the boost and tuning safe, work on your driving art. Then as skills improve start winding it up.
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  25. #55
    Registered User I'm DJ!'s Avatar
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    ^oem is not a gt35 and serves him right for buying the gtr which can nevva loose

    Plan for this is time attack. Can't fit it in any cams classes after the twins come off. Can't even officially do targa tassie without twins. Hence this burger is getting the lot.
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  26. #56
    Registered User I'm DJ!'s Avatar
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    Update:

    Stroker ordered. Cage underway.

    Old bloke head whisperer is suggesting keep oem cams, and with his other tricks it'll be enough for max torque at 7500rpm rev limit, dunno may still go 264s.

    Clutch is OS twin plate, looks in good nick but while it's out will rebuild it to be sure.

  27. #57
    "The bitches, are wet" Sketchy's Avatar
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    Look into US cams, cheap upgrade that is quite common. Slighty more duration and lift from memory.
    Quote Originally Posted by Dimi View Post
    80mm of penetration isn't bad, i wish i had that much.
    Quote Originally Posted by schnitzelburger View Post
    My entire working career pretty much consists of suckin dick and takin names.

    Sometimes im too busy to take names.

  28. #58
    Registered User I'm DJ!'s Avatar
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    ^thanks mate, also shot an email to garagewhifbitz as they have a custom cam they've competed succesfully at circa 700hp.

    Here's remains of old piston..
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  29. #59
    Registered User I'm DJ!'s Avatar
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    Stroker kit has arrived at plr.

    Any hook-ups for internal sandblast / painting? Cage will be final welded Tuesday.
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  30. #60
    anyone? MRMOPARMAN's Avatar
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    lookin good dude, however i disagree with your head bloke. if you have the money, going full hog on the head, and making the exhaust side flow, will give you good gains in power, response, and reduce pumping losses.

    have a search for TK's 2J fullhouse head (and have a read of his RB26 head thread too). heaps more info there.
    Last edited by MRMOPARMAN; 08-06-12 at 09:35 PM.
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