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  1. So I pulled the motor to fix an oil leak and I'd...

    So I pulled the motor to fix an oil leak and I'd been having some issues still with the engine cutting out after WOT and found the issue. 24 tooth reluctor had slid off the keyway and gouged its way...
  2. Haha, yeah slowly but surely :)

    Haha, yeah slowly but surely :)
  3. Yep, it was the pump. The walbro i went to put...

    Yep, it was the pump.
    The walbro i went to put in was actually a 450, and had to make some mods to the assembly but it all worked.
    Fuel pressure is now constant at WOT and readjusted the system and...
  4. Ok thanks guys. I've got the fuel pressure flow...

    Ok thanks guys.
    I've got the fuel pressure flow rates uploaded and I'll take the car for a drive tomorrow and see how it goes.
    I think everything should now be ready to do some fine tuning and get...
  5. Ok, tried using my brain a bit and figured it...

    Ok, tried using my brain a bit and figured it out.

    Flow rate = g /sec

    Then used the raceworks calculator to work out the effective lb/hr rating of the injectors, so 375cc @3 bar = 35.7lb/hr and...
  6. Ok, unfortunately I can't seem to find any data...

    Ok, unfortunately I can't seem to find any data on what they'd flow at 58psi though
    This is everything I could find:

    The Bosch 0280155868 flows 375 cc/min at a tested pressure of 3 bar (43.5...
  7. Adjusting tune for higher fuel pressure 43.5 - 58psi

    Hi All,

    I've been replacing system after system in my car chasing a cause for a backfiring and stall at high rpm when I go WOT and the car kicks back a few gears and I've just replaced the fuel...
  8. Any ideas guys? I'm gonna put a walboro 255 in...

    Any ideas guys?

    I'm gonna put a walboro 255 in this weekend and see if there's any difference.
  9. Ok here's this morning's run. The wideband was...

    Ok here's this morning's run. The wideband was showing it running lean, around 16:1 for the most part after warm up.
    At around 20:12 in the log was when I decided to try WOT and the car cuts out...
  10. Here's the log file from the short run i did.

    Here's the log file from the short run i did.
  11. Ok, will do. Just to get an idea of the final...

    Ok, will do.

    Just to get an idea of the final product, once I've adjusted everything, what sort of fluctuation should I see in the wideband reading overall?
    Like if I dial it in to get 14.27 AFR...
  12. Ok, so complete engine setup is: 400SBC, stock...

    Ok, so complete engine setup is:
    400SBC, stock crank and rods, hypereutectic pistons 8cc relief
    AFR 220cc ported and polished heads
    XFI280 Hydraulic Roller cam with 1.6 roller rockers
    Holley...
  13. Yeah I have the 3 DTCs so the MAF delete is...

    Yeah I have the 3 DTCs so the MAF delete is working as intended.
    We'll put the 2nd o2 bung in today and start from there.
  14. So I wired up the narrowband but I don't think it...

    So I wired up the narrowband but I don't think it worked correctly as now it just registers 3mv and only seems to spike when the wideband max's out at 4.9v then it blips.

    On the way to work this...
  15. Hey Jaydubb71, Yes I'm logging Wideband through...

    Hey Jaydubb71,
    Yes I'm logging Wideband through the EGR sensor method.
    So (EGR volts / 0.5) +10 = AFR

    I think the tune was set up to not use closed loop, but left bank o2 is not set up properly....
  16. SBC 24x tune Backfire and Engine Stall at WOT from cruise

    Hi All,

    I'm having a strange issue that I can't seem to find anyone who has had the same issues and was wondering if anyone can point me in the direction of possible causes.

    When I try to go...
  17. Just a quick question, which one is considered to...

    Just a quick question, which one is considered to be the signal wire on the 4 wire o2 sensors, signal low or signal high?
    I'm using the below pinouts:

    A = Low signal
    B = High signal
    C = Ground...
  18. Thanks for that, I'll give it a try and see what...

    Thanks for that, I'll give it a try and see what I find.
  19. Bank 1 O2 sensor doesn't fluctuate - Any Ideas why?

    Hi All,

    I've finally got my project car running smoothly and reliably and I'm looking to get my fueling issues sorted and get a bit more economy out of the thing.

    I need to trim some fuel, but...
  20. VY commodore Trip Computer not working - Tune related or BCM?

    Hi All,

    This one might be specific for the commodore guys, as it would be a VY commodore problem if it weren't in a Pontiac TransAM :P


    The trip computer is not working on my car. I have a SBC...
  21. Thanks DrLoch. I haven't touched the trans...

    Thanks DrLoch.
    I haven't touched the trans tables, these were how they were from the base tune Ben used for my setup.

    I mentioned to him the transmission was stock, and non-pwm so would those...
  22. 4L60E wants to downshift 2 gears instead of 1

    Hi All,

    Engine wise, my 24x SBC400 is running great, but the transmission seems to be a little iffy and I wanted to check if there's something wrong with the tune in that respect.

    It's a 95...
  23. VY Commodore Speedo reading half what it should - How to fix?

    Hi All,

    I'm having issues with my speedo.

    I've got a small block chev 400 24x converted motor with a 0411PCM running the unified OS, and the logging software has the right speed, the...
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    Fine Tune 24x Knock (false?)

    Hi All,

    My car is finally up and running thanks to Ben, and AFR is mostly dialled in. The is running fantastically, but I'm still a little worried about knock, or more specifically false knock...
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    218

    I'm only a newbie as well, but the engine is...

    I'm only a newbie as well, but the engine is revving higher but your logged acellerator level doesn't move, are you sure your base tune is for a cable driven throttle body and not drive by wire?
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