Quote:
Originally Posted by thambu19
Sorry I did not read the last part right. I thought something else where the ECU is monitoring Exh and CAT temp using some modeling technique. If it is using O2 sensor current it should be close to actual temperature.
The reason you are running colder (although 720C sounds pretty cold to me) is because of E85. E85 will cause colder exh temp due to the additional spark. The more spark added in the colder the exh and vice versa. Same with cams. The earlier its opened the hotter it is.
I am wondering if ECU ever uses this value to manipulate fueling. Like adding extra fuel on top of open loop fueling if the temps are too high. Will need those running headers to tell us what temps they are seeing for exh and cat.
|
I assume its using front o2 sensor ,i have catless header but retain the stock secondary cat, so it probably going to run a bit cooler that stock with primary cat in header i would think, plus the E85.
I will try to plug my tactrix into someones car with stock header on petrol and see what the temps are