harley-davidson twin cam cnc ported heads

Flow is around 250 or 255 from memory.Īny advice as to plan of attack would be appreciated, I will also post up pics of heads.ĭeuce, i will chime in when i get home tonight, Screamin' Eagle have released a few years back a CNC ported factory head with 1.875' intake valve and the same exhaust as the 2012 head. I have a Dyno chart somewhere of a comparison between the 2 above heads on the same bike (same dyno) to show the improvements so far which I will try to find. Stock flow is around 220cfm from memory (I will check and get back to you)ġ.805' intake valve, 1.575' exhaust valve, 7mm stemīeehive type single spring (can handle a little more lift than the other head) Stock flow is around 199cfm (intake) at 0.55'ġ.85 intake valve, 1.565 Exhaust, 5/16' stem. maybe 270cfm if that is recommended for my combo. Somewhere around the 250cfm 0.55 would be the objective. I have 2 sets of heads: one stock untouched set from a 2002 and one stock untouched set from a 2012.įirst I would like advice as to which heads would be better to start with, and second, where the improvements can be made. I'm looking for some porting advice on some Harley-Davidson heads. So what are you waiting for? Its Free and takes just a moment so register for an account today!.

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Harley-davidson twin cam cnc ported heads