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  1. Is it worth getting a custom JB4 map if you’re not doing flex fuel

    put it in 3rd or 4th, preferably 3k or lower. mash the gas pedal all the way down, feel free to continue the pull for one or two shifts. no need to manually start logging by tapping the button, the jb4 will auto-log once you floor it (as long as it isn't disabled in app settings). Your call on...
  2. Is it worth getting a custom JB4 map if you’re not doing flex fuel

    on both logs you are playing around with the gas pedal too much and don't go all the way down until nearly at the top of the gear. as a result, the jb4 is not actually commanding the wgdc for most of the pulls. on the map 2 log I checked timestamp 520 and 3618. on map 4, 1013 and 3613.
  3. Remove Mass Damper?

    is this correct for the secondary guy?
  4. Valvetronic Servimotor needs replacing?

    I think this error code is referring to the motor in the cylinder head that controls the intermediate swing cam, not the exhaust flap.
  5. Fuel IT Flex Fuel Sensor, Port Injection, Bigger Turbo?

    i think the "routes to big power" thread is partly to blame, since the example breakpoint for LPFP does not specify whether the assumed fuel is 93, e85, or a blend. as you know, the stoich difference is non-trivial, so if someone interpreted the following quote: to mean 650 whp on 93, then...
  6. anyone notice anything at the 1:00 mark? new trim or just modded?

    and looks like it's running the two-tone wheels just painted black
  7. Race Tracking Your Supra - Information exchange

    Maybe it's just the lighting, but it looks like the bushing doesn't even wrap entirely around the bar, like it was designed for smaller diameter or they sent you the wrong one
  8. JB4 Maps on 93 Octane

    i would not read too much into a cause and effect with such small changes. the dme itself can vary boost targets (and therefore the control strategy to achieve those targets) by 2 psi from pull to pull within minutes of each other.
  9. JB4 Maps on 93 Octane

    agree. last few pulls the throttle looks great but timing goes down. back off boost a bit and compensate with lower duty bias to keep throttle open.
  10. JB4 Maps on 93 Octane

    At the boost levels you're currently running, we're still in the throttle valve's command range, and fuel trims at the high end are nowhere near maxed. You're unlikely to hit fuel cut/limp mode. But, yes, I'm suggesting that you can run more boost at 5k (and above) if you wanted to, and the...
  11. Factory exhaust condition?

    it was a random side discussion, but the number of design revisions and dependencies to make something on a car is very real.
  12. JB4 Maps on 93 Octane

    Overboost is an overloaded term, could you elaborate what you mean by overboost?
  13. Factory exhaust condition?

    https://www.supramkv.com/threads/2024-supra-possible-diff-leak.20173/post-332033 https://www.supramkv.com/threads/2024-supra-possible-diff-leak.20173/post-332176
  14. JB4 Maps on 93 Octane

    Trims and timing look great. You have throttle closures right at 5k that corresponds to your target curve ramping down, at the same time that FF is ramping up. You're basically asking the JB4 to do opposite things at the same time. You can either change your duty bias to ramp up less...
  15. I'm literally willing to pay for a test drive

    possibly dumb thought, would trying something like a manual m340i on turo give OP an idea of the power/transmission feel?
  16. Dropped bolts under motor

    Get a magnet on a bendy stick That being said I don't blame you, the button head bolt and loose spacers combo is clearly not the best design decision by verus. if you drop a spacer, the undertay will need to come off because those are non-magnetic.
  17. Downpipe Install Help

    also, dont be surprised if the new DP won't slip onto the exhaust until you get it aligned up perfectly. i spent an hour just trying to get it started, seriously considered renting a pipe expander. be aggressive with it, use your whole body and legs to shove things around.
  18. JB4 Maps on 93 Octane

    Ignition timing in all cylinders except 3 are all super smooth. i wouldn't worry about this unless cyl 3 keeps having this problem, pull-to-pull variations are normal (remember knock is a stochastic event). FF and WGDC look nice and aligned, no throttle closures. Trims are momentarily high...
  19. Toyota Supra Front Camber Plate Assembly (MKV) by Versus Engineering - $325 obo

    yes, was able to cancel it before I sent the DM earlier today





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