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Just measured on my boost controller and powerfc rpm. Got 3410rpm and 3439rpm hitting 18psi in 4th. Dunno how accurate that is tho lol

So ~3800rpm in 2nd. Still pretty responsive.

If its making that much boost in fourth its not really going to be a whole lot different in second.

It'll be at least a couple of hundred rpm later. But I'm still impressed.

My AX53B70 makes 15psi around 3400rpm in 4th and 3900rpm in 2nd and mine is a much smaller turbo.

I'm thinking I'd love a GTX3071 with 0.63 (hopefully it won't have the overboost issues).

Edited by simpletool
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