Hypothetically. (mine is not detting, Legs uncrossed).

If the car did suffer from Det & no modification was carried out to cure it, Roughly how many miles would it last..

I know this is hard to judge, i.e way the car is driven over those miles, So lets say Spirited driving.

Dean

 

depends on the level of det

 

It all depends o the level 0f det

It could last over 15000 miles or 1500 (maybe less) depending on the way its driven.

Impossible to say unfortunately

 

I had a dawes set at 1.2bar fitted to my 02 STi and drove it for about 20,000 miles like this. I fitted a Knock sensor and found it was detting but not much and only under very hard driving.