First real 272xp port job

[Aaron winslow]

I timed a aftermarket 272xp cylinder today. The numbers I got seem decent from what I’ve heard and read. I’m thinking the only number I should change is the intake to 76 degrees BTDC. That will give me 152 degrees of duration. So final numbers will be 102ext/126trans/76int. Does this sound correct? I’m open to any suggestions Thanks.

 

[Fatherwheels]

Any porters care to comment here.

 

[huskihl]

Would run a bit better if you could get the transfers up to 120