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I don't have the sprintex but I have witnessed the issue demonstrated. The person whom demonstrated the issue also helped develop the kit.
The original sprintex tune I believe doesnt measure intake air temps (charged temps) so heaven knows how hot the IATs are getting. The sprintex kits in the uk are using a map sensor with temp sensor. The tune pulls timing before IATs get to 70C. Its fact not an assumption.
Twin screw sc are less efficient and generate more heat which is properly why the cosworth kit has two large (bigger than sprintex) heat exhangers in the intake manifold to stop the intake temps getting damagingly high on track.
I was set on the kraftwerks as the centrifugal SCs don't increase charge temps significantly but this cossy kit my have swayed it for me.
Cost are very similar here in the uk.
This cossy kit is running at 70% capacity so it look like this has been engineered for higher power but probably requires internals and oiling changes.
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