High Compression Ratio ----> Detonation

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High Compression Ratio ----> Detonation

10-12-2007, 04:26 PM

Post: #6

NoHachi Offline

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One grade colder as a maximum..anything more and the car will bog and splutter at low revs and idle. Rally cars running very high compression also have this problem..they need two sets of plugs to race..one set to warm the engine up at lower rpms and one set for full load high rpm race duty.
More overlap will reduce the engines effective dynamic compression ratio. You could play around with the effects by advancing the intake cam by 1 or 2 degrees and see if it helps..if it does, the TODA cams might be worth a try.

Did you try running a pig-rich mixture at full load(lambda 0.8 or so) to cool the intake charge? Might also be an option, certainly around the peak cylinder pressure point (max torque..guessing yours would be around 5000-6000rpm).

A wheel to steer the front of the car
A pedal to steer the rear

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Messages In This Thread

High Compression Ratio ----> Detonation - apardal - 10-12-2007, 10:46 AM

[] - dikolotour - 10-12-2007, 11:36 AM

[] - NoHachi - 10-12-2007, 01:51 PM

[] - apardal - 10-12-2007, 01:55 PM

[] - Eircamae86 - 10-12-2007, 03:11 PM

[] - NoHachi - 10-12-2007 04:26 PM

[] - Ivan141 - 10-12-2007, 05:57 PM

[] - apardal - 10-12-2007, 09:44 PM

[] - oldeskewltoy - 10-12-2007, 10:33 PM

[] - NoHachi - 10-12-2007, 11:29 PM

[] - robokill - 10-12-2007, 11:43 PM

[] - oldeskewltoy - 10-13-2007, 01:24 AM

[] - apardal - 10-14-2007, 03:46 AM

[] - NoHachi - 10-14-2007, 10:05 AM

[] - apardal - 10-14-2007, 02:25 PM

[] - jamiemirror - 10-16-2007, 09:21 PM

[] - robokill - 10-16-2007, 09:44 PM

[] - Ivan141 - 10-16-2007, 10:17 PM

[] - Lipinhu - 10-16-2007, 11:11 PM

[] - apardal - 10-16-2007, 11:21 PM

[] - oldeskewltoy - 10-17-2007, 06:07 PM

[] - apardal - 10-17-2007, 08:00 PM

[] - apardal - 10-17-2007, 11:23 PM

[] - Uzelac - 03-23-2009, 05:35 PM

[] - irishtwincam - 03-23-2009, 05:50 PM

[] - oldeskewltoy - 03-23-2009, 10:25 PM

[] - jondee86 - 03-24-2009, 03:49 AM

[] - irishtwincam - 03-24-2009, 11:27 AM

[] - totta Crolla - 03-24-2009, 11:20 PM

[] - totta Crolla - 03-24-2009, 11:26 PM

[] - GTRJazz - 03-26-2009, 12:57 AM

[] - jondee86 - 03-26-2009, 06:24 AM

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