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Detonation is caused not by the pressure of compression, but by the heat generated by that heat. This is important because there are a lot of ways to mitigate that heat and the LTT uses several of them to good effect. Since the GM says to use regular unleaded, you should be able to add a fair amount of boost if you are willing to buy premium fuel. I bet you could do 10 psi all day, but I am happy to wait and see how it works out for a few people before I try.
Those of you who say that a turbo only works at high revs need to look at the modern DI turbo engines, it’s not your dads turbo. GM’s LNF and the twin turbo 6 in BMW’s 335 and 135 make their max torque by 2k and hold it past 5k.
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