7875 + 5.9 + E85 + Megasquirt

TT5.9mag said

Pull timing out of it on the two step. It puts a lot of heat in the exhaust and spools the turbo. You’ll make more than 3 psi. Although foot braking you probably can’t hlod back much more than that.

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I haven’t messed with the 2 step on mine yet, how much timing are you allowing it to pull? Can it go negative? My previous MSD 2 step would build 5psi at 2500 in neutral so I wouldn’t think the car would be any more difficult to hold back than 0psi at the same rpm.