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crash7
Hockenheim


Joined: 28 May 2011
Posts: 702



PostPosted: Tue Feb 04, 2020 10:13 pm    Post subject: Reply with quote

Youngsyr - If you go down this road with a VF charger please keep us up to date.


Ken @ 9E - What potential issues do you see with adding 5 psi to an M96? - Where do you see the additional stress?
 
  
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996ttalot
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Joined: 21 Sep 2009
Posts: 1518
Location: Horley Gatwick


PostPosted: Wed Feb 05, 2020 10:49 am    Post subject: Reply with quote

crash7 wrote:
Youngsyr - If you go down this road with a VF charger please keep us up to date.


Ken @ 9E - What potential issues do you see with adding 5 psi to an M96? - Where do you see the additional stress?


Nothing really - 5psi is fine assuming the mapping is good. We ran 9psi on our 964 on stock engine for a considerable time which we felt was probably above the limit and we wanted to run more, so no choice but to build the engine for low compression.

I don't think the m96 would be as bad for pressure leaks - but as anyone who knows 964 engines, the intake side is not exactly sealed in the first place, and on top of that several components post throttle could not take even 7psi without failing, and then even replacing with new Porsche versions, they still failed, hence why we CNC certain parts to stop boost leaks.

Not sure whether 5psi is enough to make it worth while - don't forget you only make that near the top of the rev range, it is not instant 5psi.

Ken
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