Ok so this is my first SD tune on a DI car. My question is how do I know what the pressure ratio is that should be in the ve chart. This car had been previously tuned in SD. When I first opened the virtual VE and looked the whole table, it looked horrible, not even recognizable as a table. The pressure ratio was 0-1.5. I played around with the pressure ratio values and when I entered the 0-1.0 range the manifold switch open table became a pretty decent looking table. The car is a V7 YSI blower. So I wonder how does one know what the previous tuner had in the pressure ratio column to arrive at a "ve" map? The car ran decent before, made good power. Was very rich in the higher rpm's.
I am sending the tune. All I have changed is the injector and fuel pump to match a lt4 as I replaced those. I switched to flex fuel. Smaller Pulley. CPR fuel system. The car has meth injection as well that I am hoping i wont need much of.
The MAF is very unstable as it is before the blower and the recirc valve messes it all up.
Thank you in advance.
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Originally Posted by Ben Charles
