harley-davidson twin cam cnc ported heads

HARLEY DAVIDSON TWIN CAM CNC PORTED HEADS FREE

This is an older set of screamin eagle 110 heads i did, these heads are a pretty good head to work with ( check peak flow 330cfm ), i have shown this to give an idea how important the valve job is.the dark blue intake curve is the stock head, the white line is the same head after port work, the next line above that is identical port with our valve job, the porting only showed gains over. Starting off as a cnc ported head this ended up flowing 280cfm 1.875 valve Heres a set of 7mm stem CNC ported heads i did not long ago.one thing i will say is that these heads are constantly changine as far as the valve job and port shape goes, we are seeing many variants of the same style head over a short period of time, the current valve job isnt too bad, there are also gimmicks that harley have tried One dealership owner built a new bike for himself and for his wife both identical engines one with the CNC ported screamin eagle 110 heads and the other engine had the same heads but we gave them a touch up, i think they were testing the value of spending the extra on hand finishing, they didnt tell me the results but kept sending heads to get work done so it must have been worth it.LOL I have plenty of flow data but not so many pics.we have done a bit with these, i have played around with bigger valves in but its tricky due to valve to valve clearance depending on cam size so now days we stick to the 1.875 valve because most of the harley work i do is trade work for dealerships and they like to keep it simple.i have also played with the 1200 sporty heads and have made high 90's RWHP with those as well, the guys that dyno these claim 10 - 15 RWHP gain over the CNC ported heads with the work i do to the heads and intake which is a big gain for 2 cylinders but i do heads intake and throttle body, 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.

HARLEY DAVIDSON TWIN CAM CNC PORTED HEADS FREE

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Harley-davidson twin cam cnc ported heads