What a head flows and what you get out of them for power are to totally different things!
Roger that. Best flow with the smallest cross section. Unless it's supercharged, then turn em into sewer pipes.
So looking at these heads, it seems that the exhaust springs only have a damper spring in them, none on the intake. Is that normal? Thanks.
Did they have the rotators on them.. that makes them heavy
Dunno. Whats it look like? But spring, keepers, retainer, valve weighed 239 grams.
They are a bearing that allowed the valve to turn easier.. usually on heavy duty truck engines I dont have a pic of them.. but they were about a 1/4" to 5/16" thick... took the place of the retainer.. you would know if they were on there.. someone could have puled them off.. I always trashed them
