94ford5liter

i checked the compression on my motor at about 140k and they were all between 125 and 135, most over 130. The car has now 145,000 on it. I was just curious how long do you guys think it will be before i start losing serious amounts of horsepower, and how fast does the compression decrease.

94ford5liter

anyone have an idea?

SchoolBoy

Well mine checked in at 110 with 192,000 on the clock, and I can definatly tell the difference. Keep in mind tho, I have 100 less horse and torque to start with than yours. I would say that you might be ok up to 165k then a rebuild is a must.

grabbem88

it's a matter of how hard you abuse it,and how well you take care of it.
i have seen motors getting rebuilt with less than 10k,and some still screaming with over 200,000.
your compression is fine by ford standards...actually better..

Duffs302

I checked mine at 165k and there around that 130-150. The lowest reading cylinder must be within 15 psi of highest reading cylinder (100 psi minimum).