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Mine is limited to 10 lbs and 5700 RPM. On the dyno it saw 12 lbs and 6000 RPM on one pull but didn't make any more power than it did at the lower boost level. I have a very small roller cam and that is one of the "other things" I mentioned in addition to a more capable turbo. As I said there are several things holding my overall output back, but IMO I am better off working on optimizing my chassis to use the 700 I already have, rather than going back into the system for more power. Right now though, due in part to that mild cam, it is an extremely docile street motor with good economy. And when I take it off the leash, I am completely content to have 700 HP available.

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Not trying to dispute your performance but a pair of those turbos should not run out of breath that fast. Do you think you had some valve float or fuel issues ?
Allan G.

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Interested in why you say that? With a boost threshold of 2200rpm being out of breath and choking the engine at 5000rpm is not surprising at all.

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My comment is based on the fact that each turbo can support 600+ HP when pushed hard enough. Twin should be double ?? Not claiming to be an expert but have personally seen a sigle application make over 600 HP. Maybe something to do with bakpressure limitations or something ?

Allan G.

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