Quote:
Originally Posted by gtc
CIS was good enough that Porsche used it for the 930s entire run and into the '90s, well after everything else in their lineup was using motronic.
That seems like a pretty good endorsement to me.
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Actually, Porsche endorsed MFI well into the eighties for racing.. CIS simply didn't cut it for racing, only when EFI came along was Porsche able to retire the MFI technology.
For production cars they simply compromised performance for fuel economics and production cost. Fact.
The 930, well, it simply took em longer to get a reliable EFI for turbo'ing.. Different parameters and all that.. So it took em a bit longer to get the turbo EFI into the production line.
I really fail to see where the CIS endorsement is..
No Factory Racing Porsche has ever used CIS. They used MFI for that.
Every seen an 911 RSR turbo with CIS?
or a 917? a 935 perhaps? Or what about the 936? how about the 956/962?
Please tell me which racing legend from Porsche, owned the race tracks with CIS injection...
Not even the 924 Carrera GTR and 924D variants used CIS, no. When Porsche really needed power , they used a Kugelfischer Mechanical injection and individual throttle bodies on the 924.
If you want to play find the CIS gear, try looking for a triangular Kugelfischer logo.
There' s your endorsement for CIS. They never used it when they needed reliable high end power. Not even for a 924 or 944.
Bringing CIS to a 70'ies and early 80'ies race , would have been like bringing a knife to a gunfight so they simply skipped from MFI to EFI.