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[JKM]

Looking for some wisdom.  I have a 2008 CVO Road King.  Currently stock internals to the exception of a Woods 777, S&S pushrods and lifters.  I was thinking of sending my heads into J Precision to be re-worked and also shave the heads to increase compression.  I've heard ideal compression is around 10.4 for the 777 cam.  Can this compression be achieved by simply shaving the head?  Will I have any problems running pump gas?  I will have them port the throttle body at the same time. 

Is the stock 50mm throttlebody plenty for this motor.  I'm running a Harlen Ness Big Sucker Stage 1 for intake and V&H dresser duals with Twin Slash mufflers.

Considering Stage IIIB package by J Precision http://jprecision.com/twin-cam/

I'm also planning on swapping out the compensator so that I don't have any problems in the future.  I only have about 6K miles on the bike.  Anything else in the primary I should be thinking about

[HD Street Performance]

Can this compression be achieved by simply shaving the head

You can get to about 87cc without too much drama.
I would not do the head work and instead get a larger TB, a 55-58mm from HPI, and Power Duals and some good mufflers. Then a retune by a shop that knows their stuff. The 110 will respond handily.

When 122+ hp is the goal out of the 110 then head work becomes more prudent. The heads produce close to 300CFM stock. In comparison there have been many a 103-107" that makes 120/120 with heads that only have 270 CFM capacity @28". Also fair to remember the 5 speed bikes rate 6-7% higher due to less drive train loss.

[HILLSIDECYCLE.COM]

We have seen those un-touched heads roll off those flow numbers........
Scott

[JKM]

Scott - what are your thoughts?

[JKM]

any other thoughts?

[m1215]

i was wondering the same thing. my plans were to use hi comp hd pistons, woods 777 and hd cnc heads or option 2, woods 777 and cc/shave the heads keeping stock pistons. trying to decide what is better to make around 110 hp on a 2012 cvo 110 and retain reliability.

[HILLSIDECYCLE.COM]

any other thoughts?

I meant to say, is that we "have not" had those flow numbers, on an untouched head, but there is variances from flow benches.
That said, a ported 110" head, re-surfaced, with either a Wood 555, or the 777, will run VERY well indeed.
Lone Wolf Performace, Vancouver Island, showed 116/125 with the 777 and our ported 110" heads.
Another option is the un-sung S&S .570, signing off at 10.0 cr.
Jim Kennedy, of Paradise Performance, Matoon, Ill, has tuned our Stage III head/98"/S&S .570/10.0 cr/Rhinehart duals at 108/115....again only 98".
We've been using that cam quite a bit, lately, and every time, they are home runs.
Scott
Scott

[ob1]

love the 777. mine does well at 114/122 with 10.5, street ported heads, fat cat, and 50 tb on a softail. going with a 31 tooth and bigger tb for this years project to enhance things. you cant go wrong with the woods cams.

[HD Street Performance]

Actual numbers,
.1 74.5
.2 144.1
.3 205
.4 252.6
.5 276.3
.6 280.3
.7 286.1

AVERAGE from .1-.7 217

A good valve job and a little pocket porting gets them up to close to 300 with stock valves, sorry for the error.
Commentary:
These heads move a lot of air yet maintain good low lift flow. An OEM 96" head in comparison.

.1 59.4
.2 121
.3 176.4
.4 211.2
.5 223
.6 223
.7 223

AVERAGE from .1-.7 177

Stock CVO 110 head shows 23% better AVERAGE flow bench numbers than a OEM 96/103" head and in fact quite a bit more airflow than a lot of ported OEM heads. The MOCO lists flow numbers in the SE catalog that are lower. Variances in testing apparatus such as the bore fixture, inlet adapter (or Throttle Body) and testing pressure does change the numbers. HD does not list any of their testing parameters.
These heads I tested were using the same bore adapter 3.938", the 110 heads had a 45mm velocity stack and the 96" heads were tested on the same barrel and with a 1.71 id velocity stack. Test pressure is 28" H2O not converted, native. Some of the less expensive benches test at 10" and then math is used to go up to 28. Throttle bodies on the heads can show lower numbers. I show the flow numbers more for comparison purposes and not to guarantee power or advertise my product. I treat the 110 a little different than some. We either do little work to the heads or go all for it. Cubic inch size, budget, and the intended goal control the path. The stock head, better guides added of course, and a good valve job with Serdi tools plus some pocket porting and short side work does well for all of the lower lift and shorter duration cam builds.

[HILLSIDECYCLE.COM]

We purchase those heads when we get a chance, and set them aside for 117-124" builds.
We have a set, for example, on a 120(not a 120R)locally, in a Dyna, Wood 9F/62 mm HPI/Borezilla.
140 hp and 144 ft/lbs, SAE.
He JUST had us flip it around to 3.37 gearing..........
Scott

[firefighter156]

JKM great thread. Steve, I realize I'm probably comparing apples to oranges a 2008 vs 2012? but could I expect to see similar results with head work on a 110 in a 2012?  So far I did D & D Fatcat 2:1 with Woods 222 cam, Power Vison, Dyno, Woods lifters, stock Intake. Current HP104 TQ 120.  Would like to add more without going to a 117.  Or wouldn't I see much gain at all? Anyone wants to chime in feel free.

[HILLSIDECYCLE.COM]

Headwork would help, but if your looking for more, then a cam swap would be in order as well.
Scott

[Cvostu]

Send John Sachs  a PM.    He is great with headwork, cams, exhaust. Etc.     He is on here pretty regularly.

[JKM]

Thanks for the responses guys.  I will speak with my local builder/dyno guy.  I think I may go with head work and shave down to get 10.4-10.5 with stock pistons, stock 50mm TB and the 777 cam.

[Unbalanced]

Actual numbers,
.1 74.5
.2 144.1
.3 205
.4 252.6
.5 276.3
.6 280.3
.7 286.1

AVERAGE from .1-.7 217

A good valve job and a little pocket porting gets them up to close to 300 with stock valves, sorry for the error.
Commentary:
These heads move a lot of air yet maintain good low lift flow. An OEM 96" head in comparison.

.1 59.4
.2 121
.3 176.4
.4 211.2
.5 223
.6 223
.7 223

AVERAGE from .1-.7 177

Stock CVO 110 head shows 23% better AVERAGE flow bench numbers than a OEM 96/103" head and in fact quite a bit more airflow than a lot of ported OEM heads. The MOCO lists flow numbers in the SE catalog that are lower. Variances in testing apparatus such as the bore fixture, inlet adapter (or Throttle Body) and testing pressure does change the numbers. HD does not list any of their testing parameters.
These heads I tested were using the same bore adapter 3.938", the 110 heads had a 45mm velocity stack and the 96" heads were tested on the same barrel and with a 1.71 id velocity stack. Test pressure is 28" H2O not converted, native. Some of the less expensive benches test at 10" and then math is used to go up to 28. Throttle bodies on the heads can show lower numbers. I show the flow numbers more for comparison purposes and not to guarantee power or advertise my product. I treat the 110 a little different than some. We either do little work to the heads or go all for it. Cubic inch size, budget, and the intended goal control the path. The stock head, better guides added of course, and a good valve job with Serdi tools plus some pocket porting and short side work does well for all of the lower lift and shorter duration cam builds.

Let's clarify this a bit, so that the numbers are truly meaning full.   How many inches are these numbers representative of?   25"  28"  what ?