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  1. R

    87 octane can only be used?

    I would have to guess that the computer in the Mustang is set to run a given timing, stock, unless it detects knock. Then it will retard timing. I would guess the aftermarket tunes set this timing level higher to take advantage of the higher octane. The knock sensor will still retard timing...
  2. R

    87 octane can only be used?

    Its not that the car knows the octane, it just knows if it's getting knock through a knock sensor. If it detects this it will retard timing. The computer can only retard the timing so far though. I'll qualify this by saying I have no clue about how this works in a Mustang but that is the way...
  3. R

    GT Exhaust Poll

    Sound clips don't help me any, remember I said I was getting old, hearing ain't what it used to be :-)
  4. R

    GT Exhaust Poll

    I just put the SLP's on yesterday. It is my first modification so everything else is stock. The noise level is much higher under acceleration and at idle. Sounds really good. At cruising speeds it is pretty quiet. It also causes a vibration in the floor and gas pedal. It felt different...
  5. R

    Floor pans and my gas tank

    Be careful of the fuel line underneath the floor (and brake line and emergency brake cable)
  6. R

    Floor or Rear Frame First?

    Thanks! Sounds logical to me. It will be nice having a sturdy floor in before I go removing the rear end out of it.
  7. R

    Floor or Rear Frame First?

    Hello All, my first post so I think I'll introduce myself before asking my question. I recently acquired a 66 Mustang from my father-in-law to restore with my boys. The engine and the front end is in great shape but the floors were shot. I also found the left rear frame is almost gone. I...
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