Cylinder Head Question

sgarrelts01 · Oct 23, 2009

I tried looking up the number for the heads i have but i can't really find what i am looking for.

f3zm 6049 y302 heads

I can't find the CC chamber for them.

I found this Machined for 1.94" intake and 1.54" exhaust valve diameters, they are at the Shop going to get ported. I don't know much about that stuff but when they get ported will the 1.94 change to like a 2.01 or something smaller or larger.

revhead347 · Oct 23, 2009

Good lord, Y302 heads, now that is old school. I don't think you can even put a 2.02" intake valve in them.

Kurt

BlownFiveLiter · Oct 23, 2009

Y302 heads are just the "Turbo Swirl" Y303's that are unassembled. They should be 64cc combustion chambers, but you never know if they've been milled. Have the machine shop cc them, it shouldn't cost more than $10, or so.

sgarrelts01 · Oct 24, 2009

thanks a bunch

trav_19 · Oct 24, 2009

no, a port job would not change the valve size it will open up your intake and exhaust runners to help it flow better, changing valve size is a different job. and as stated ask the shop once they are assembled to test the cc's of the head. in all honesty u could do that urself, it involves a metered cylinder and water, pour water into the combustion chamber with head upside down of course, and read how much water was used to fill the chamber.

BlownFiveLiter · Oct 24, 2009

trav_19 said:
no, a port job would not change the valve size it will open up your intake and exhaust runners to help it flow better, changing valve size is a different job. and as stated ask the shop once they are assembled to test the cc's of the head. in all honesty u could do that urself, it involves a metered cylinder and water, pour water into the combustion chamber with head upside down of course, and read how much water was used to fill the chamber.

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