Closed chamber head clearance volume

bdMember

Is there any way to determine without removing the cylinder head whether the clearance volume is 62.8cc or 66.1cc on a closed chamber head? Any stamping on the casting external surface? I measured my combustion chamber volume when I had the heads off the car and came up with 67.5cc. I am wondering if I measured it correctly. These are on a very early (ser. # 1386) car.

2/6/028:57 PM

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Original Post

Russ Fulp (Guest)

There is no way of knowing without removing the cylinder head. There is no marks anywhere on the head stating what volume it is. However the way that you did it is probably the correct measurement. It all depends on how many valve jobs have been done on the heads,as it will change the volume when material is removed from the valve seat area and facing of the valve,therefor sinking the valve. So to speak. If you have any more questions please feel free to call me.

SHOP 714-870-8577

quote:
Originally posted by BD:
Is there any way to determine without removing the cylinder head whether the clearance volume is 62.8cc or 66.1cc on a closed chamber head? Any stamping on the casting external surface? I measured my combustion chamber volume when I had the heads off the car and came up with 67.5cc. I am wondering if I measured it correctly. These are on a very early (ser. # 1386) car.

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Russ Fulp@B.L.Machine

2/10/0210:00 AM

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