rickwrench
Famous Member
The log. Yes it is the worst naturally aspirated intake ever "designed", and I've hacked a few off in the name of abstract knowledge.
My question:
How much difference does it really make using a 2v Oz or Argie head vs a late 70s big valve log head when supercharging (or turbocharging)?
Seems to me that aside from the differences in flow rate of the actual intake ports there shouldn't be much difference, since regardless of volume, both intake plenums are pressurized, to say 6 - 8 psi (m90 guy here). In fact in the case of a turbocharger, wouldn't the smaller volume of the log plenum pressurize faster? All the heads can be ported, although with the log head it's a challenge to do the whole runner, most porting hp gains are made by work on the bowl, valve seat transition, and shrinking the valve guide boss anyway. I will conveniently disregard the exhaust advantage of the stock Argie individual port head.
Just random idle thoughts on the train this morning.
Rick(wrench)
My question:
How much difference does it really make using a 2v Oz or Argie head vs a late 70s big valve log head when supercharging (or turbocharging)?
Seems to me that aside from the differences in flow rate of the actual intake ports there shouldn't be much difference, since regardless of volume, both intake plenums are pressurized, to say 6 - 8 psi (m90 guy here). In fact in the case of a turbocharger, wouldn't the smaller volume of the log plenum pressurize faster? All the heads can be ported, although with the log head it's a challenge to do the whole runner, most porting hp gains are made by work on the bowl, valve seat transition, and shrinking the valve guide boss anyway. I will conveniently disregard the exhaust advantage of the stock Argie individual port head.
Just random idle thoughts on the train this morning.
Rick(wrench)