With a 251 cam I agree with your buddy.

If you keep in mind once you enhance one area, you need to enhance all area's to get a maximum benefit. If you have a cam and a cylinder that are capable of pumping the air but are limited by the the head flow you will not leverage either of the two changes for maximum benefit.

In your case your increasing the size of the cylinder. Larger Cylinder will pull more air. Your giving it a bigger glass to drink from (Cam) but you want it to drink from the same straw (Head flow). Yes weird way to compare it.

I would do the heads absolutely with that cam choice.

 

Donnie
What are my options
Can they do something with my stock heads?
Or do I have to buy new heads
I was looking @ the 103 Stg IV kit which would blow my budget but isn't out of the range of possibilities
The only thing is I read somewhere that with the Stg IV cruise control isn't compatible
Anyone ever heard this?

 

Your stock heads can be modified.
The heads on my bike have been ported/polished,larger valves installed,new guides/seals,flowed,milled and compression releases added.
There are lots of shops that do this.

 

+1 exactly. My advice from here though is make sure they are done by someone who is very experienced with a grinder with HD heads and has a flow bench to show his work. Their is a fine line between flow and volocity. A bad bench can actually cost you power! Many shops will swap your stock heads, for theirs that have already been worked. If they do not come with a flow sheet walk away!

 

Donny what is your average MPG with that power from a 96 you must be sucking down some gas. with 103 or 107 you need less gas to make power. What all did you do 211 cams, cam spacers, gasket kit and push rods?

 

This is for all of you guys who have installed the 103 Stage II kit with the 255 cams.

How many of you have had a dyno tune and how many are running on the SERT map?

I plan on using the SERT map during breakin and do the day long dyno tune afterwards.

Thanks

 

Roughly 38MPG on the slab. Yes adjustable pushrods, gaskets, new cam bearings.

I have never heard of a larger engine automatically being more efficient then a smaller one. Making "more power" is subjective and undefined. To many variables to characterize that theory you have. You also need to consider how small a change in piston surface area going from 96 to 103 really is.....Its not as big as people imagine it is.....

 

Have any of you noticed that the harley catalog is a little unclear about the contents of the kit? I could have sworn that when I ordered the kit, SE mufflers were included in the kit. After going through all the parts the dealer took off in the trailer, I didn't see the stock pipes with the other stock parts. I returned to the dealer and they told me that only the headers were replaced not the mufflers. On the '08 and earlier models, the mufflers were part of the kit and not the headers, according to the dealer. The bike runs a whole lot better and sounds better too, even with the stock pipes, IMO. So, all's well that ends well.

 

Thx. This is one of the more believable observations I have read,

 

Have any of you noticed that the harley catalog is a little unclear about the contents of the kit? I could have sworn that when I ordered the kit, SE mufflers were included in the kit. After going through all the parts the dealer took off in the trailer, I didn't see the stock pipes with the other stock parts. I returned to the dealer and they told me that only the headers were replaced not the mufflers. On the '08 and earlier models, the mufflers were part of the kit and not the headers, according to the dealer. The bike runs a whole lot better and sounds better too, even with the stock pipes, IMO. So, all's well that ends well.
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