How long for rebuild if driving HPDE only?
#19
Here is the guidelines on the 3,8l (991 albeit the same motor in the 997.2 which is more susceptible to over-revs based on shifter setup) from PMNA:
Last edited by redmonkey928; 05-14-2022 at 07:40 PM.
#21
With a 11k max I really wouldn't buy this engine even for a trackday, unless a rebuild's been priced in.
#22
Yes a long time ago, but at 10% leakdown and 196hrs on the motor total with that over-rev you are asking for trouble. If its a car from Europe a lot of times the ECU doesnt get reset so service records (ie. engine rebuild records) would be a must if claiming it has been rebuilt. But that is getting up there on the spectrum of over-revs that it wouldn't matter to me when it happened.
Here is the guidelines on the 3,8l (991 albeit the same motor in the 997.2 which is more susceptible to over-revs based on shifter setup) from PMNA:
Here is the guidelines on the 3,8l (991 albeit the same motor in the 997.2 which is more susceptible to over-revs based on shifter setup) from PMNA:
#23
#24
I would price in a rebuild. I am planning on a rebuild at 85-90 hours, my 996 motors were good for more hours. Typically 130 - 150 with no over-rev’s above 8450 and solid dyno readings.
I have seen a 997.2 motor with 178 hours but it was a miracle it didn’t blow up. More than half the valves had broken springs and 4of 6 cylinders had broken rings. 11,500 over-rev.
you are right about no perfect 997.2 being left but don’t be unrealistic about future costs. 996 motors go further for sure. 150 to 200 hours with good leak down and power.
Motors are just motors and are just money. If the rest of the car is good decide on your pain points for the motor rebuild.
I have seen a 997.2 motor with 178 hours but it was a miracle it didn’t blow up. More than half the valves had broken springs and 4of 6 cylinders had broken rings. 11,500 over-rev.
you are right about no perfect 997.2 being left but don’t be unrealistic about future costs. 996 motors go further for sure. 150 to 200 hours with good leak down and power.
Motors are just motors and are just money. If the rest of the car is good decide on your pain points for the motor rebuild.