Quote:
Originally Posted by p76rangie
Once the head is tightened down, the difference between the thicknesses of the two types of gaskets is bugger all. In theory, there will be a very slight change in compression and power, but nothing you will notice and certainly not 10% change
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Where DO you get your information from?! Here is note from a guy trying to SELL Rover composite gaskets and yet admitting the compression drop.
RPi Engineering - V8 Engine and Component List
Please ask around a bit more or, alternatively do hands on research..like we do. There is not an single Rover race engine builder alive who would back up what you say. Alternatively, if you do not have facilities, simply examine NEW 4.0/4.6 heads next to 3.5 or 3.9s and then explain why the former are measurably skimmed. It will only take you a few seconds.
James (sigh)
