Head, cam, intake install

Discussion in '1994 - 1995 Specific Tech' started by traewolfe, Jan 31, 2013.

  1. I am thinking about doing a HCI swap. My car has about 130k on it. What are the thoughts about doing this without doing anything to the bottom end?
     
  2. That's not that high a mileage. Check the compression. If it's good, go for it.

    Kurt
     
  3. With that milage, I'd do a compression & leak down test..if those have solid results then go for it as new H/C/I/ are gonna put some umph to it. If the motor was cared for and not beat to death all should be fine. I might drop the pan and replace the oil pump.
     
  4. A bad indication on a leak down test on an engine with good compression is more likely to be a valve problem then a ring problem. If you are changing the heads it doesn't matter. There are tons of Mustangs with that many miles on them with HCI combos. That doesn't mean your engine is necessarily the optimum candidate, but it's likely fine and it will work fine. I've seen high mileage engines perform better on a compression test than a new one. If you have been using synthetic oil then it might not have much wear at all.

    Kurt
     
  5. A bad indication on a leak down test on an engine with good compression is more likely to be a valve problem then a ring problem. If you are changing the heads it doesn't matter. There are tons of Mustangs with that many miles on them with HCI combos. That doesn't mean your engine is necessarily the optimum candidate, but it's likely fine and it will work fine. I've seen high mileage engines perform better on a compression test than a new one. If you have been using synthetic oil then it might not have much wear at all.

    Kurt
     
  6. What should the compression be on a stock motor? What would be considered undesirable to do this?
     
  7. You are more checking for even compression. Excellent compression is all the cylinders with 10% of each other. As long as one or two cylinders isn't way off, you are good.

    Kurt
     
  8. just do it and get it tuned...the motor will handle it fine
     
  9. Do it, it will be a whole new car. Doubtful your compression is bad if it was taken care of and not driven hard.