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Join Date: May 2004
Posts: 7
2.7 upgrade.....

I posted earlier, and it's somewhat clear that under the constraint of 2.7 litres and cis that 210 horsepower is a high goal.. One article I read dealt with a 3.0 cis carrera with a 964 cam reaching close to that goal. Provided I make the jump to higher displacement, what is the best piston,cylinder, cam, compression ratio combo with "reliability" and "driveability" in mind. I really am interested in keeping the CIS, and would be happy with 200-210 horsepower. thank you

Old 05-10-2004, 02:27 PM
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Join Date: May 2002
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What's this infatuation with 210 hp? 150 or 160 is powerful enough IMHO. You can get 175 if you build an S motor out of your 2.7 with the CIS.

Otherwise, it looks as if a 3.0 is in your future, and even with that, 200-215 is about the highest I've seen with CIS atop those engines.

And even so, 215 with CIS is accomplished more or less with a hybrid motor, where one mates the bottom end of a newer SC engine (9.3 compression) with the top end of an early SC engine (larger intake runners), 20/21 cams, headers and a loud exhaust.
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Old 05-10-2004, 08:09 PM
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Join Date: Feb 2001
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Hmmm, why settle for 5" when a little surgery can give you 7"

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Old 05-11-2004, 12:15 AM
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