Re: when is mileage too high for modding?
check compression and go from there. there isnt a set mileage that you cannot mod past, its different for every car, all based on many variables. You can have a car with 250k on the motor and it could very well have better compression than a motor half its age.
1998 Eclipse GST Spyder - 14b turbo | 3" Catback | Evo8 BoV | 170fwhp if that
2003 Redfire Cobra - 448whp/435wtq - Sold