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lvporschepilot lvporschepilot is offline
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Join Date: Jul 2005
Location: Atlanta
Posts: 951
Originally Posted by trond View Post
but thought that in the peak torque area where cylinder filling is best cylinder pressures will be equally high also with hotter cams. If not there would not be much point in hotter cams ?
That is correct. A hotter cam only raises the rpm where peak efficiency is realized. Static compression is still being reached, or if it's a good breathing engine such as the case with ITBs, greater than static compression is reached depending on head flow, cam, and engine rpm. This is why it's called dynamic compression as it's dynamically changing based on flow and rpm.

I would still go one heat range colder on the plugs and see if that helps. With NGK plugs, and if I remember right, each heat range decreases plug tip temp ~50C. Try heat range 8 if you're using 7 now.
No physical quantity completely explains its own existence
Old 08-22-2018, 04:20 AM
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