Measuring exhaust back pressure?
I am interrested to see if anyone has found a magical 1:1 ratio in any of the popular turbo's? SC61 users jump in here please?

If one can achieve the same exhaust pressure ratio as inlet pressure ratio, where does this leave cam theory, since there is no more back pressure, why is overlap a problem?

 

Yes, on my EMS (Autronic) you can use an exhuast pressure sensor. With in time I will test all these out for my race set up on the engine dyno. I know of someone that had even better than a 1:1 ratio where the exuast pressure was lower than the compressor's pressure.