- Sun Nov 20, 2022 12:17 am
#59694
Sounds like a good setup for most purposes. If using BC, you can find the WG response with no BC action, as is the initial tuning setting. When building a table, we often use a check valve (2-port), pull the springs, or wire the gate open (1-port) in order to tune the NA section of the tables well. This is not only safer initially, but also allows tuning in areas the turbo would jump past in normal accel, but could enter in other situations. Most importantly, it provides a view of trends of what the engine likes and needs with greater load and rpm. This allows much better prediction for extended areas not yet tuned.
Once that is covered, the turbo is let run on just WG to find where it goes, often using lighter WG springs. Every engine, fuel and setup will be different, so take your time and explore carefully. If using a det-limited fuel, this allow you to tickle the dragon's tail with low danger and regular reading of data and signs, such as spark plug reading (read-up!). Once it's happy to the boost limit of the WG, you will be able to see where in the tables it needs different WG action to shape the boost curve, boost recovery, etc. That's when you begin adjusting spring rates and using active BC to form the engine response the way you want or need to. "Fill the holes" using a clear picture of what it needs from all the data you have gathered. You should be having lots of fun along the way.
Once that is covered, the turbo is let run on just WG to find where it goes, often using lighter WG springs. Every engine, fuel and setup will be different, so take your time and explore carefully. If using a det-limited fuel, this allow you to tickle the dragon's tail with low danger and regular reading of data and signs, such as spark plug reading (read-up!). Once it's happy to the boost limit of the WG, you will be able to see where in the tables it needs different WG action to shape the boost curve, boost recovery, etc. That's when you begin adjusting spring rates and using active BC to form the engine response the way you want or need to. "Fill the holes" using a clear picture of what it needs from all the data you have gathered. You should be having lots of fun along the way.
-= If it was easy, everyone would do it =-