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Thread: Na-t bws360

  1. #1
    Nice Celica Bro Club Member Mike2JZ's Avatar
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    Na-t bws360

    Engine Type - NA-T

    Engine Spec - Stock GE, TTHG, ARP Headstuds, 550 Siemens Injector, Whifbitz NA-T Kit, SRD Intercooler, TT Inlet Manifold welded to NA runners.

    Turbo - BW360 0.88 A/R

    Fuel Used - Shell Vpower

    Exhaust - 3''

    Transmission - R154 & A01A

    ECU - Link

    Mapped By - SRD

    Dyno Used - SRD

    Power figure - 450hp @ wheels (~530bhp)

    Torque figure - 450 ft.lbs @ wheels (~530 ft.lbs fly}

    Boost Pressure - 1.3 Bar (11.5 AFR) [~80% injector duty]

    Not my supra, friend of mine who's not on the forum. Results from Whifbitz kit are pretty good though, thought some of the NA-T guys may be interested in what it could achieve.

    IIRC 1.3 was on the limit of the distributor, anything more would cause misfire so will need coil conversion for more boost.



    Wastegate Pressure (0.8 bar)


    1.3 Bar



    Comparison



    Attached Images Attached Images
    Last edited by Mike2JZ; 18-09-19 at 00:00.

  2. #2
    Me? Post? Never! Club Member Style's Avatar
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    Good numbers there. Was the ignition system all new components? I’ve heard of dizzy NA-T’s going into the 500’s but I sometimes wonder if that’s just down to different dynos
    '96 SZ-R 6 Speed.
    Whifbitz NA-T
    Project Thread Here

  3. #3
    Nice Celica Bro Club Member Mike2JZ's Avatar
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    Quote Originally Posted by Style View Post
    Good numbers there. Was the ignition system all new components? I’ve heard of dizzy NA-T’s going into the 500’s but I sometimes wonder if that’s just down to different dynos
    Don't think the ignition system was especially new, just stock leads as well. Put some new NGK BKR8E plugs in before mapping, but had to drop gap to 0.6mm to avoid miss at 1.3 bar. Perhaps with new rotor and beefier leads it would allow for more boost, but prefer the coil route as it allows for per cylinder control due to direct spark.

  4. #4
    I'm addicted now! Club Member
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    You can get the HKS ignition amplifier and run all the horsepower you want ...but I'm going bolting a vvt-i head on my non-vvti bottom end, coil on plug and better spool for the turboooooo
    1994 Stock TT Supra & N/A 5 soon to be NA-T 6 speed

  5. #5
    Dark Wizard Club Member David P's Avatar
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    Quote Originally Posted by Style View Post
    Good numbers there. Was the ignition system all new components? I’ve heard of dizzy NA-T’s going into the 500’s but I sometimes wonder if that’s just down to different dynos
    It's not so much the distributor, it's the 10:1 compression that restricts boost to 1.3bar max before pre-ignition becomes a problem.

    For more than 450ish bhpftlb, fitting a GTE headgasket drops the GE compression to 9:1 and which then allows more boost.

  6. #6
    Me? Post? Never! Club Member Style's Avatar
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    Quote Originally Posted by Mike2JZ View Post
    Don't think the ignition system was especially new, just stock leads as well. Put some new NGK BKR8E plugs in before mapping, but had to drop gap to 0.6mm to avoid miss at 1.3 bar. Perhaps with new rotor and beefier leads it would allow for more boost, but prefer the coil route as it allows for per cylinder control due to direct spark.
    Even at 1bar I was running into issues every now and again so it's good to know you guys have managed to push it a little further than that. I've just gone CoP on mine and didn't realise how straight forward it was. Wish I'd done it years ago

    Quote Originally Posted by David P View Post
    It's not so much the distributor, it's the 10:1 compression that restricts boost to 1.3bar max before pre-ignition becomes a problem.

    For more than 450ish bhpftlb, fitting a GTE headgasket drops the GE compression to 9:1 and which then allows more boost.
    It's already got a GTE headgasket installed.
    Last edited by Style; 18-09-19 at 08:33.
    '96 SZ-R 6 Speed.
    Whifbitz NA-T
    Project Thread Here

  7. #7
    What search button? Club Member sidewaysdan's Avatar
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    Did you do the cop yourself mate ?
    Was looking to do the same on mine
    i love my toys

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    Metal Wide Arch 13J Club Member Noz's Avatar
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    Quote Originally Posted by Style View Post
    Good numbers there. Was the ignition system all new components? I’ve heard of dizzy NA-T’s going into the 500’s but I sometimes wonder if that’s just down to different dynos
    .
    I ran 501hp with the dizzy without any issues. On dynojet. I'm certain it would have done more easy enough. Went cold though to save myself the pain.

  9. #9
    Metal Wide Arch 13J Club Member Noz's Avatar
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    Quote Originally Posted by sidewaysdan View Post
    Did you do the cop yourself mate ?
    Was looking to do the same on mine
    All depends on what ecu you have.

    If you go standalone itll be easier. So much easier.

  10. #10
    Me? Post? Never! Club Member Style's Avatar
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    Quote Originally Posted by sidewaysdan View Post
    Did you do the cop yourself mate ?
    Was looking to do the same on mine
    I sourced and fitted the parts but it's being wired in at the moment by someone who knows what they're doing as I'm hopeless at that stuff.

    I picked up 2JZ-GE VVTi coil packs, a Toyota DH61 igniter, TT oil pump, TT crank trigger, 2 TT crank sensors and a plug for the hole that the distributor goes into. I used a bracket and custom cam gears for the cam signal but you can easy just weld the cam sensor onto the cam covers like this guy has done.

    https://www.supraforums.com/threads/...ensors.571928/
    '96 SZ-R 6 Speed.
    Whifbitz NA-T
    Project Thread Here

  11. #11
    Nice Celica Bro Club Member Mike2JZ's Avatar
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    Quote Originally Posted by Noz View Post
    .
    I ran 501hp with the dizzy without any issues. On dynojet. I'm certain it would have done more easy enough. Went cold though to save myself the pain.
    Can you post graph. Be good to get some other NA-T's on dizzy on the forum for other people's reference.

  12. #12
    Metal Wide Arch 13J Club Member Noz's Avatar
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    Quote Originally Posted by Mike2JZ View Post
    Can you post graph. Be good to get some other NA-T's on dizzy on the forum for other people's reference.
    Dont have a graph sadly mate with the 501hp. Was only testing to see if there were any boost issues with the exhaust manifold.

    The coil conversion that we did using Syvecs was relatively straight forward. Using Audi R8 coils.

    I'm sure many US boys have got higher hp values with the dizzy. I can recall seeing various values over the years.

    I still retain the dizzy gear mechanism for cam position, so if I go cams itll be quite the opportunity as I haven't seen anyone on any forums use the BC pre vvti cams yet on a build.

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