[Tigers] More cubes for Tiger

[Ron Fraser]

Robin
	This was early smog control.  Ford used the thermactor emission
control system or T/E.  An air pump was used to pump air into each exhaust
port.  Later heads have an internal passage for the air.

Ron Fraser

-----Original Message-----
From: RObin Young [mailto:robin02 at mindspring.com] 
Sent: Thursday, January 27, 2011 4:26 PM
To: rfraser at bluefrog.com; tigers at autox.team.net
Subject: RE: [Tigers] More cubes for Tiger




	Mk II heads are the C6OE-M casting; this head has an extra lobe of
material at the exhaust ports that could be machined for the air injectors.
The Mk II heads have the lobe but are not machined and these heads would
have press in studs.   This is not the same head casting used on the HiPo
engine.

The 1966 HiPo heads were the same as the 1965 model; they have none of the
above extra material at the exhaust ports.

Ron Fraser

Ron,  I ported my old heads using the gasket as a template and removed the
lob you mentioned.  I was told Ford cast it that way as a way to further
vaporize fuel since Fuel Injection was not yet common.  Two questions for
you?  Is this a plausible reason?  Could it be an early performance
enhancement?  Robin Young

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