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. At Dan Vance Racing we offer custom high performance cylinder head
and engine modifications for Harley Davidson motorcyles. We have performance kits for every riding style. We can provide torque
and horsepower increases in any or all RPM ranges.
110 Heads Power
Starting at: $995.00
Here we have a set of Harley Davidson 110 cylinder heads ![]() It seems to be a common thought that these
Harley Davidson cylinder heads have too big of a port to allow these motors to make good power. They sure are some big ports
but, with the aid of modern technology, these ports can be re-sized to flow great numbers and also increase the velocity to
acceptable levels. My experience of welding inside the ports has given me an advantage over other porters. With a little bit
of welding in the correct spots and a little bit of massaging these heads work great. With this port configuration the heads
flow really well on the bottom and mid range and have a spectacular top end.
Of course the cam choice will dictate where the power will come in the RPM range making these 110 cylinderheads very user
friendly for all kinds of cams. They will provide smooth crisp power at the touch of the throttle and continue pulling until
you get out of the gas.I just can't say enough about how good these Harley Davidson 110 heads are working. The first thing that must be done to these cylinder heads is to replace the
valve guides with a shouldered valve guide. The guides that are presently in the heads have no shoulder and this is causing
the valve guides to move around. After the install and honing of the new guides they are fitted with new high tulip valves
(which also helps to increase the velocity). When the valve guides are installed and honed to size, I put a 7 angle valve
job (5 on the seat and 2 on the valve face) which also helps to promote a smooth flow of air from the intake to the cylinder.
New valve stem seals are installed and the valve springs pressure is set for the cam of your choice. I then mill the
head gasket surface .010" to insure a good flat surface for better sealing.
When you receive your heads they will be ready to install. I can also provide you with the appropriate gaskets, camshafts,
piston combination and anything else that you would need for this install. I am also offering my services after the
purchase for any questions you might have on install or break in.
Depending on cam choice, I have seen 115 to 138 torque and 131 for the horsepower. These heads also work great on 107, 113, 117, 120, and 124 motors!! The prices quoted are for work on YOUR
heads. At this time I do not have an exchange program but I plan on making this part of my exchange services soon.
Here is a dyno sheet of a 117" motor, ( 4.375" stroke with a 4.125" bore) that has a set of my reworked 110 heads. Almost all of the dyno sheets show this kind of smooth acceleration up through the power band. This motor has the T man 625 camshaft with compression set at 10.5:1 and a HPI 58mm throttle body. The bike is a blast to ride. Good manners in town or with a passenger on country roads, but grab a hand full of throttle and your arms will immediately start to stretch and will continue getting longer until you get out of the throttle. This bike is a full dresser with windshield, bags and the works. Great power in all rpm ranges, on pump gas. ![]() |
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