I’m not sure how much compression the stage four is pushing, but the 447 cam might build very high cylinder pressure. This could make for a good looking graph at full throttle, but could make the bike not very streetable. I’m talking about detonation when accelerating under a load. The four valve head is a different animal and may be able to handle a lot of cylinder pressure without detonation. It’s like Steve Cole says, that dyno graph doesn’t tell you about driveability.

I do know where you’re coming from. It’s the reason I really liked what I saw when Fuelmoto put the wm8-22x in a stock CVO 117”. Just remember that the stock 117” is only 10.2:1 compression. Even with that compression, with the 22x the intake valves are closed at 22 degrees abdc and it develops 217 psi cylinder pressure at sea level which is the same as the M8 107 with the stock cam. I would bet that this is a very streetable combination.

 

The factory 117 Stage IV kit is rated at 11:1 compression ratio. We recommend the TTS 200 cam for that application. Attached are the results of just that build and with ~115 ft lbs @ 1700 I do not see the need for much more on a street bike.

 

Impressive.

 

Yea man.

 

That's an impressive chart.

 

Had my stage iv done this past summer, 125hp 116tq. With fuel moto full exhaust.

 

What is your opinion of the kit ?
Do you have a dyno graph ?

 

Nobody does but it should be close,I at least got 122 hp and 114 tq,Road King Special stage 4 SE high flow W/Street canons with cat removed from the muffler and TTS master tune
Before muffler mod and getting rid of the se tuner was 115 hp and 113 tq,Both at the same dyno and tech doing the tune and in SAE not STD
Also the speed limiter came in at 105 mph wich means a stage 4 would only work about a third of the way through 4th gear and its done

 

I'm giving it all she's got Captain!

Damnit Jim, I'm a Parts guy not a Mechanic!

 

It only took me 2000 miles and TTS 200 cams and she runs like a best.