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[Fullsac Performance]

This will be a series of on going dyno testing being done on one specific bike. Many exhaust test, the good and the bad, cam changes ect. All comments and questions related are encouraged and welcomed.

Yesterday a good customer of ours showed up at our front door with a brand new 2017 107 Road Glide on his trailer with a freshly installed SE Stage IV 114 kit. He looked upset? He said, I had Harley install the Stage IV kit and they stole all the bottom end power and put it at the top. So into the dyno room we go. A half dozen pulls later I was almost in disbelief. He was right, torque robbery everywhere you ride. Seven cubic inches bigger, 11-1 compression, and it makes less power than stock below 3200 RPM? That's not easy to do people. Lol..   He said, , I gotta go, fix the TQ curve, slammed his door and drove away. But before he did he said, oh ya, keep it as long as you want. Trying not to act excited, I said ok, but this might take a while to fix. Quite a while indeed.

So here's the baseline pull from our new 2017 Stage IV 114 test mule, and a run from my bone stock 2017 107. Both pulls 5th gear, hitting the speed limiter.
Heavy damage to the Low end for sure, but I think it' salvageable, I have a few ideas! Lets start with a TTS tune up.

Steve@fullsac.com

[JCZ]

WOW   

Look forward to seeing the next dyno sheet posted....

[Fullsac Performance]

WOW   

Look forward to seeing the next dyno sheet posted..

Are you ready?  Here it is!

TTS Tune up! What a difference! But still a turd on the bottom end.

Steve

[Fullsac Performance]

Do you ever wake up in the middle of the night with a great idea? 
This is a stock 2017 front half with my own back half. 2-1. The dyno will tell us shortly of any greatness or lack there of...

Any predictions?

Steve@fullsac.com

[JCZ]

Are you ready?  Here it is!

TTS Tune up! What a difference! But still a turd on the bottom end.

Steve

Better but we know there's more in there.  So again, I look forward to the next dyno sheet you post.....I have the faith in you

[*58Vette]

I would like to see an overlay of the three pulls shown.

[Fullsac Performance]

I would like to see an overlay of the three pulls shown.

The basic function of the dyno is to gather and record data for before and after comparisions. Its up to the person in the "know", to interpret and present the data in a such a fashion as to not be misleading. The first two runs are apples and apples, as delivered bikes from the dealer, with speed and rpm limiters.

The last run with TTS Tuning is really not a level or fair comparison to the others. I turned off the speed limiter and raised the rev limiter. Overlaying runs with different speed and RPM limiters is not comparing on the same scale. Very misleading and unethical if being used in a profit driven manor. The TTS tuned run is the new baseline. To me it represents a bone stock 2017 114 stage IV, with a much needed software update.

Hardware update is next.


Steve@fullsac.com

[Sarhan]

Damn 

First & second runs with same head pipes & mufflers, what's the brand? It was tuned by dealer or no? calibration was correct when it came to you or flashed with something else? 

[Fullsac Performance]

Damn 

First & second runs with same head pipes & mufflers, what's the brand? It was tuned by dealer or no? calibration was correct when it came to you or flashed with something else?

Run 4 is a bone stock 2017 107 oil cooled Road Glide as delivered.
Run 9 is a another identical 2017 RG with Harleys Stage IV 114 kit installed, also as delivered by the dealer with stock headpipe and Street Cannons. This chart represents what Harley pushes put the door before anybody else touches it. Pretty obvious why the aftermarket does so well. Lots of hidden potential inside the Stage IV, just going to take some dyno time to sort it out

Steve@fullsac.com

[Lever]

steve your  right  ...here's my stage iv dealer installed dealer tune etc ..dealer installed fuel moto head and re tuned  look at the difference with aftermarket stuff  these m8 engine's  are sleep beast just begging to be awakin
https://www.cvoharley.com/smf/index.php?topic=111647.0

[Fullsac Performance]

steve your  right  ...here's my stage iv dealer installed dealer tune etc ..dealer installed fuel moto head and re tuned  look at the difference with aftermarket stuff  these m8 engine's  are sleep beast just begging to be awakin
https://www.cvoharley.com/smf/index.php?topic=111647.0

Sleeping Giant for sure. I did a lot of exhaust testing today, this is where it ended. The bottom end is terrible. Good powerband for a drag bike, useless for Touring. Replacing the SE 515 cam next with a SE447. I need to get those numbers switched around.

Steve@fullsac.com

[Lever]

my bike is the same way as well

[spook120]

As some are aware, I did my Stage 4 build but used the HD stage 3 cam, jackpot head pipe and Fullsac 2 inch baffles.  Tuned with a TTS.  I am pleased.  Torque is 100+ from 2200 on up to 6k.  Bike is not loud but sounds solid.  Interestingly it actually idles like a HD should rather than that 1200 RPM idle that is common to the newer bikes.  I suspect I could get mildly better numbers with an aftermarket cam, but for the riding I do the bike does everything I want and actually does it quite well. 

[Fullsac Performance]

As some are aware, I did my Stage 4 build but used the HD stage 3 cam, jackpot head pipe and Fullsac 2 inch baffles.  Tuned with a TTS.  I am pleased.  Torque is 100+ from 2200 on up to 6k.  Bike is not loud but sounds solid.  Interestingly it actually idles like a HD should rather than that 1200 RPM idle that is common to the newer bikes.  I suspect I could get mildly better numbers with an aftermarket cam, but for the riding I do the bike does everything I want and actually does it quite well.

From what I have seen, that was a lot better choice than the 515. The one disadvantage all of the SE cams have, is the fact that there were designed and required to pass an emissions standard. That usually sacrifices best performance at some point. I'm rethinking the 447 plan. I think I will give TR at Tman a call today.

Steve@fullsac.com

[JHD06]

After a couple of attempts with the M8 Stage IV the 515 cam was very weak below 3500, put stock header pipe on, lost about 5lb tq and hp, but throttle response felt better, cam change great feel now big improvement