Of course people will correct me if i'm wrong, but lag will come with the 63 turbine. Smaller turbine will make for a faster response and bigger turbine makes for more lag. I think the that's why the T3/T4 is so popular, it has a smaller turbine with a big compressor. This makes it so the turbine spools fast and with a big compressor you're able to push out more air even faster. Man people are going to demolish this post if I'm wrong haha.
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-Juan
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