BigBoostUSA B58 dynos at 822whp !

[CobraMarty]

The valve lift on the Valvetronic engine will be a limiting issue. Maximum lift is at 9.9mm.
There are no high lift cams available and unless you know how to make more intake valve lift, the power output will be limited even with more boost.
Valve float is also an issue with higher rpm and especially with more boost.

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[AHP]

^^Discarding all of the other variables, 9.9mm of valve lift by itself is definitely not a limiting factor until you get into big boy numbers. I've made an easy (as in not pushing the setup beyond 8/10's) 1120WHP with 'only' 9.45mm valve lift.

 

[MA617M]

I'd be really interested to see the flow rates on the B58B30M1 head, especially vs the JZ engines (which actually flow quite poorly)

 

[CobraMarty]

30mm intake valve, 9.9mm lift, valve float at not much over stock boost and 5500rpm.
Making over 550HP is where it gets difficult.

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