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  1. FastDriver

    SN Mustang Magnum T56 swap

    I wonder if SN95 headers would better clear my 7 o'clock bellhousing.
  2. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Definitely not one time use.
  3. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Awesome. Yeah, those are valid reasons to doubt my guesses. Glad the tuning is getting there. Wish I had a NOS liquid line.
  4. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Or overfilled, and doesn't hit the pop-limit in cold weather. Also, these liquid lines today are often not to proper spec. They are often too restrictive. Confirmed this with a couple of folks who spend a LOT of time on foxes professionally. I'm going to address this in Black Jack, where I...
  5. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Chances are that it's still under pressure. It just went to high on the high side.
  6. FastDriver

    SN Mustang Magnum T56 swap

    If you have a Hydraulic TOB, then you won't have a clutch fork. So, no worries. Can't speak to your header issue, but I would look to see if someone else has done it before. Pricey setup, but will be cool to see. Keep us posted!
  7. FastDriver

    CHANGING BRAKE PADS

    Sorry. Inside joke
  8. FastDriver

    CHANGING BRAKE PADS

    Fuel pump relay or whatever the circuit is called in your car If that doesn't work, then let's just skip to the end... it's a megasquirt setting.
  9. FastDriver

    CHANGING BRAKE PADS

    You trying to use a cube tool or a real piston turning tool like this? https://www.summitracing.com/parts/sum-900408 If it truly won't budge, it may be seized and need replacing, but you can try a fee things to persuade it. Make sure the parking brake is fully loose. Crack open the bleeder...
  10. FastDriver

    CHANGING BRAKE PADS

    You talking about pushing the pistons back into the caliper? If so, you need to use a c clamp with the old brake pad to press both pistons in at the same time.
  11. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    First, full credit to @nicholase for putting us onto the PSID/delta-pressure explanation. That was the key mechanism, and he nailed it. But this is also why I kept harping on the old data and why I wanted the raw transducer voltage/generic sensor value. The transducer itself could be perfectly...
  12. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Put a multimeter directly on the transducer signal wire while the engine is running and compare voltage to what MS reports.
  13. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    "and during the blip it drops to 11.8 and then instant 19.0. (I think this is actually a excessive rich condition)" Not likely. This is ovethinking. A lot goes on when you blip the throttle: 1. tip-in/accelerator pump fueling 2. every cell in your Load/VE table that you travel through. 3...
  14. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Ran into a guy from Boston at the hotel bar tonight. Loudest guy in the place, very spirited, and somehow still obviously a good dude. Is this just standard Boston behavior?
  15. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Absolutely can. In fact, if you had a leak allowing O2 in upstream of the WBO2, the computer would read that as lean no matter how much fuel it dumped trying to compensate. Or, if you were so rich it misfired, oxygen gets through without burning and that makes it look lean. I'm stimied...
  16. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    That price was from my order email from maybe late '24. Bought from Lethal Performance and its $159, now: https://www.lethalperformance.com/accufab-86-93-mustang-5-0l-fuel-pressure-regulator.html
  17. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Erm... I thought mine was an aero when you mentioned it, but it's an accufab. Can you send it back? Just tell em it didn't fit a stock setup. You might like this one more:
  18. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    Hmmm.... Adding VE everywhere is possibly another indicator that 39psi wasn't really 39. Another indicator is how rich you need it to be to idle right, 13.8:1, IIRC. If you're really at 29 psi base fuel pressure, it's not 'atomizing' or spreading as well, so you're fattening it up to...
  19. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    The Friday log still keeps the channel/math question alive for me. The only thing I still don’t think is fully settled is whether the exact value you’re watching in the datalog is raw gauge rail pressure or some calculated/derived fuel pressure value. The Friday log actually makes that concern...
  20. FastDriver

    Mustang5L5’s progress thread - Rear window fun

    So, Vac-referenced is what makes sense to me, and I also see "Sensor type: gauge" at the bottom. That too looks right. Can you give us the other options for both settings? In any case, you need to know that the pressure reading you're making decisions off of is what you think it is. I'd...
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