+++++ you know that 117 will be nothing short of amazing even with low compression. The 107 kit is a great way to make power on a budget.

 

That is really what I would like to hear. I don't want to split cases and spend 2 grand on bottom end work. I don't hammer this bike and would likely never run it over 5,500 rpm.

 

The cranks have known problems, but it is not widespread. If it was me, I would build the 107 or 103 without the crank work, and watch it for issues, such as noise, oil pressure drop etc. If you twist a crank, usually it is not death and destruction immediately to the engine, but gives you warning signs. At that point, then tear it down and put a good crank in it if it ever comes to that.

 

My little 103" makes 98/109, and I'm not worried about the crank...LOL. Steve (HDWRENCH) and I have been talking about the 117", and it may be in the works for next winter. I asked him about bumping up to a 107", and his opinion was "103 to 107 would be like pissing up a rope." Very professional- didn't try to sell me a $600 set up that was going to net me an extra 4/4.

 

As many know we build a a large amount of these stroker engines a year. And with the 107 being able to produce great power, using a stock crank in a 117 however is treading on thin ice with a stock crank. A low compression 117 for street use is a killer set up. It will not set any dyno records. However a 9.8.1 117 with a mild andrews cam stock t/b simple CNC porting will make tq in the 130+ range. For a normal street engine that is a mild set that lays down some of the best usable power that you will come across.

107 kits even mild sets are making great power and compared to stock are massive a increase. keep in mind that you do not have to build a high lift cam roller rocker, high compression engine to have fun and make good power, Dalton nailed it. Keep track of the engine, pay attention!!!! Plenty of great running 103 or 107s out there. If you are going to make the move then go 107 if you have a 103 stay with that and improve upon it. Dyno sheets are a starting point to look at however the new gearing in the 07+ bikes makes comparing them to a earlier bike harder. Add the gearing plus FBW bikes olny complicates the issue. The FBW bikes are not producing the power we have seen from NON FBW. Even so a 103 or 107 making 115 TQ is a fun daily rider. Take care. Beau give me a call would you.

 

So now that all the subject matter experts are paying attention to this thread, let me go off topic (sort of) and pose this question. Assuming I build a 107. I know to get the most out of it Im going to have to ditch the V&H short shots I have on and go with a grown up 2 into 1 system. And I know one of the best systems out there is the D&D. Problem is, and no offense guys, I hate the looks of the blacked out version and chrome isnt an option. How much do you guys think I will be giving up by going with a Rhinehart 2 into 1 instead? Noticeable or should I do what I want and not worry about it?

 

here is a 107 with a woods 6-6 compression was 10.1 stock t/b CNC heads with the pipe you are speaking of on a softail. I have only dyno'd two bikes with this pipe both where softails. But you can take a look and see what it has. The head pipe is rather large and I feel would work great on a larger engine. Even with that tq dip the bikes runs great. 5th gear pull and 6th gear pull listed there. It gives you some what of a idea of what you can look for in a NON FBW set up.

 

Thanks Steve. That is exactly what I was looking for but couldn't find any place.

 

You are welcome. I have to say the peak tq numbers with that pipe where impressive. THe overall curve not as good as others but in the end comparing stock to built very nice increase. That bike was tuned using the TTS and V tune. Reason for lesser amount of runs. As you are not sampling the V tune runs. Overall the lady that owns the bikes loves it as well she had picked out the pipe before we did the build. I did a search as well looking for other dyno sheets with this pipe and could not locate a 103/107 with it.

 

nice curve on that dyno Steve, gives up a little on the bottom, but the midrange is big and FAT!