345 head options??
#2
Archive Gatekeeper
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I think you're referring to casting numbers- The '356' heads are from the M28.21/22 motors (and perhaps the M28.11/12 too? dunno) and are basically 2mm bigger in every important dimension (valve diameter and port size), vs. the M28.01/02/03/04 '345' heads.
So you could use the 356 heads but you wouldn't derive any benefit from the bigger valves. I have to imagine that 345 heads are plentiful, I think I'd save (or sell) the 356s for rebuilding a Euro S motor.
So you could use the 356 heads but you wouldn't derive any benefit from the bigger valves. I have to imagine that 345 heads are plentiful, I think I'd save (or sell) the 356s for rebuilding a Euro S motor.
#4
Former Vendor
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And the larger Euro port and valves will decrease the velocity through the head, reducing the power in the lower and mid rpms.....something not desirable in a 4.5 liter CIS engine!
You should find the correct heads.
They should be plentiful and easy to get.
Try 928 International...they should have stacks of them.
Last edited by GregBBRD; 10-25-2021 at 05:36 PM.
#5
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