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[Nocvo]

You guys are great.  This is helping me get a much better understanding of everything.   The explanation on CNC really answered my question and makes sense.  Seems like it would be a great way to duplicate a good head design once one has been designed.   

I will check with bvhog on his experience with the 625 and appreciate the reference.

Would be great if that cam can be used now and down the road when I do further upgrades like heads, cylinders and pistons.
 

T-Man 625-PS
This cam was developed to make the power sooner in the torque band while still maintaining its power in the higher RPMs. This is a good choice for 103” to 107” cubic inch builds with head and piston modifications utilizing a 10.2-10.6 compression and has worked very effectively in larger displacement motors where customers are seeking a torque monster. Making it a perfect choice for two-up riding where torque is desired while still providing the quick acceleration for hot rodding around town. This cam requires performance valve springs due to its 625 lift and adjustable pushrods in stock twin cam heads. It’s our go to cam for the CVO models as a bolt-in cam and will not require valve spring upgrades but will require adjustable pushrods. Cold cranking pressure at 10.2:1 is 195 PSI and at 10.6:1 is 205 PSI at sea level.

[dave brode]

snipped

Back to the topic
So I measured the heads to clear up the apparent discrepancy on port CC. The SE MVA head had 109.6cc. The stock CVO 110 head measured 107.6, for what its worth. The port geometry is completely different which is obvious when looking at what head cores are used to CNC which have origin in the SE110+ heads.

So much for the "right sized" 98cc port.

I have searched and not had much luck finding pictures or much info at all on the SE110+ heads.

[MCE]

Port CC by itself is virtually meaningless without some sort of context. It's a very crude
way to compare ports. Cross sectional area(s) and length are much more meaningful.

 

[TIMINATOR]

If the port cc is smaller, and the flow is the same or better, then midrange torque will be higher with the smaller head, but with the same top end HP as long as the flow quality is similar.
The out of the box CCs of the untouched MVA heads I installed on my bike measured smaller by 5+ CCs than untouched 110 SE heads that I removed (I'll check my notes and get the exact numbers). I did some light clean-up work later to the MVA ports, but they are still smaller. I bought the 2017 CVO Breakout new in August with the larger CC CVO110 heads on it. I have another set of SE 110 heads on the bench that measure essentially the same as the ones I removed, the other set is on my wife's bike. I'll have to dig up the before and after dyno sheets of the head swap, but both the upper end HP and torque at 2K-3K were higher with the MVA heads, as is the fuel mileage.  So are there different CC CVO 110 heads? 
I did get a return call from someone in the SE division about 6 months ago and he said that the MVA heads were designed smaller, especially in the intake port roof area. TIMINATOR

[MCE]

fill in the dead areas.
Flow goes up and velocity is much more uniform.

[HD Street Performance]

And as I state before the shape and geometry of the 110+ head is very different than the cvo 110 head. Volumes does not tell the story. The mva head is just an opened up 110+.

[TIMINATOR]

If the CCs are smaller, it is not just an opened up 110+ head, it has to be filled somewhere, or start out smaller somewhere. Like the roof of the long side.  TIMINATOR

[TorqueInc]

The mva casting is it's own animal
Designed to be cnc ported

Ports are small before CNC

If you run a mva program on a 110 head less than 70% of it cleans up

[HD Street Performance]

Agreed and I stated that previously in this thread. The die casting cores are the same in the ports as the SE 110+ head.

[dave brode]

Casting #s for 120R and 110+ with 2.120".
17015-08 [or -11]
17016-08 [or -11]

What about similar heads with 2.080" sold as SE Pro with casting #
17067-08
17069 -08
[or -08A]

[HD Street Performance]

They are stock CVO110 castings with late model tbw mount holes drilled.

[dave brode]

Don,

I don't doubt that they have the same ports as the CVO110s, but the heads with 17067-08 / 17069-08 casting #s look different than the CVO110 heads with 17248-07 / 17250-07 casting #s.

The script or plate is in the same location as on the 17015 /17016 casting numbered heads [110+, MVA and 120R]. A little farther from the corner.

Dave

[dave brode]

CVO110 insignia location

[HD Street Performance]

Yes they do look different. The logos are off and two holes are drilled for the badge.

[dave brode]

Fwiw,

I just saw a set of CVO110s with a 17248-08B front and 17250-08A rear.


First one with a B suffix that I've seen.

This the newest versions?

Dave