curious what the headwork is looks pretty decent. yet believable numbers too.
Just has to be a lot of fun
Here is a quote from the builder, Ward Performance, which was posted on another thread on this forum:
"In response to the thread suggesting we do not replace valve guides in order to cut costs or corners, please know that is not the case. In fact, we do this for a specific reason. In 2010 for a short period HD produced castings with 332M Markings on them. 332M is the alloy and heat treat. These particular heads are notorious for cracking around the valve guides. We have seen them cracked in untouched, stock form, and some crack while removing the valve guides, while others crack when installing the valve guides.
We have gone so far as to remove the guides by machining them out. This eliminates any pressure from pressing or pushing them out with an impact driver. During installation we also heat the head in an industrial oven, then submerse the guide in liquid nitrogen. At that point we are able to push the standard size guide in the head by hand, using no extra force. However, we have still experienced occasional cracking with this method.
It got to the point where we wouldn’t even rework heads with the 332M markings on them. The heads marked 242 T5 were the only heads we would touch.
In 2014 HD released the Twin Cooled 110. These heads were once again marked 332M. Naturally we were very concerned we would see the same cracking issues. My feeling was the best option on these heads was to leave the stock valve guides in place and not risk having the heads crack. I created a CNC program to circular interpolate the valve guide, tapering it to the shape of the performance bronze valve guides we typically use. I then had to create a CNC porting program to port around the valve guides. Both of which took weeks to develop to get the finish and flow results we were looking for.
We can only use this approach on new heads or heads with low miles. Valve guides must have acceptable clearances or we are forced to replace them. I can assure everyone we did not go through all this extra work to cut corners or be cheap.
As far as larger valve sizes, we too offer larger valves for the 110 head. We have great results using the original 2.080” on the flow bench and the Dyno. We have experienced and also had feedback from other shops on 113” and 117” builds, with horsepower numbers in the upper 130’s and low 140’s using this CNC head package. Obviously Dyno numbers can vary greatly depending on the combination, Dyno and tuner."