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[snotrc]

Hi Guy's
I have been following all the posts having to do with Fullsac baffles installed in a M8 bike. I had a 2015 CVO RG Ultra with the 110, Harley race tuner and Fullsac 2.0 Cores with the muffler sleeves. Absolutely loved the sound and performance.

Purchased a 2017 CVO limited to go back to the batwing fairing (better half did not like the RG) and I find that the power and pull of the M8 is very acceptable for stock.  Yes I want more but for this season I want the warranty to cover with no questions from the dealer.

My problem is this, understanding that the M8 will not sound like the 110 as the cat is in the head pipe but yet I am really having a hard time with the sound of the stock bike what cores do I need to order from Steve.  2.0 was wonderful so do I stick with that or do I go to the 2.25 or did I also see a 2.5.  Also do I put the packing and sleeves in or just the baffle?

I am looking not to hurt performance yet change the tone and increase the DB as much as possible with no other changes.  Just want it to sound like a Harley!

Thanks you

[FLSTFI Dave]

With the M-8 stock head pipe, you only get a little more sound, weather its Fullsac cores, Screamin Eagle Street Cannons or other slip ons.  I have heard several. 

I have the 2.25 Fullsac cores in my 17 SESG.  I used the Perforated Muffler Sleeves and Techmat Blankets also.  Sound is quite a bit louder than stock after about 1k miles on the cores.  Has some bark when you get on it.  The quieter sound is starting to grow on me.  My 13 King with the same muffler set up and the DX head pipe is louder for sure.

My wife had the Screamin Eagle street cannons on her 17 Road glide special.  Again a little louder than stock, and deeper. 

[pvanwagner]

snotrc - I was messaging Steve at FullSac today with almost the exact same plan.  He was suggesting the 2.0" for the sound and to be able to get good power if/when I do the headers in six months.  The wife and I have 2017 SESG's.

[snotrc]

Dave, Just a question but would it be better to run without the mat and screen allowing more air space therefore louder? Or am I missing the idea behind the techmat.

With the M-8 stock head pipe, you only get a little more sound, weather its Fullsac cores, Screamin Eagle Street Cannons or other slip ons.  I have heard several. 

I have the 2.25 Fullsac cores in my 17 SESG.  I used the Perforated Muffler Sleeves and Techmat Blankets also.  Sound is quite a bit louder than stock after about 1k miles on the cores.  Has some bark when you get on it.  The quieter sound is starting to grow on me.  My 13 King with the same muffler set up and the DX head pipe is louder for sure.

My wife had the Screamin Eagle street cannons on her 17 Road glide special.  Again a little louder than stock, and deeper. 

[snotrc]

Pv, I have read that the 2.0 will be a better performer and I can tell already as with my last 5 bikes it will definitely get upgraded. Already scoping out tman cams and for sure a tts tune, just want to get a little warranty time under the belt before I dig in.

snotrc - I was messaging Steve at FullSac today with almost the exact same plan.  He was suggesting the 2.0" for the sound and to be able to get good power if/when I do the headers in six months.  The wife and I have 2017 SESG's.

[SDCVO]

I tried to leave the cat in and stick with the new HD tuner with Fullsac 2 1/4 and just couldn't do it.

[FLSTFI Dave]

Dave, Just a question but would it be better to run without the mat and screen allowing more air space therefore louder? Or am I missing the idea behind the techmat.

It may be slightly louder but I prefer the tone with the mat in, less tinny. 

[pvanwagner]

It may be slightly louder but I prefer the tone with the mat in, less tinny.

Dave,

By "less tinny" do you mean "not tinny"?  If they sound tinny, then I might go with something else.  I'm used to the D&D slash downs we had on our 2011 Limiteds (103") and they sounded awesome and provided great power after dyno-tuning with a TTS both with FullSac Headers (my bike) and with stock headers (wife's bike).  I keep reading great things about the FullSac cores, but definitely don't want a tinny sound. (We've used SERT on our 95" softtails (2003 & 2005), TTS on our 103" Limiteds (2011) and FP3 on our 103" Softtail Slim and had great results with all of them).

Can you elaborate a little please?

By the way, I purchased on April 1st my SESG in the same color pattern as yours.  Still planning out all my upgrades.

Thanks.

Paul.

[snotrc]

I tried to leave the cat in and stick with the new HD tuner with Fullsac 2 1/4 and just couldn't do it.

LOL I am afraid I will have the same problem!

Thanks guys!

[FLSTFI Dave]

Dave,

By "less tinny" do you mean "not tinny"?  If they sound tinny, then I might go with something else.  I'm used to the D&D slash downs we had on our 2011 Limiteds (103") and they sounded awesome and provided great power after dyno-tuning with a TTS both with FullSac Headers (my bike) and with stock headers (wife's bike).  I keep reading great things about the FullSac cores, but definitely don't want a tinny sound. (We've used SERT on our 95" softtails (2003 & 2005), TTS on our 103" Limiteds (2011) and FP3 on our 103" Softtail Slim and had great results with all of them).

Can you elaborate a little please?

By the way, I purchased on April 1st my SESG in the same color pattern as yours.  Still planning out all my upgrades.

Thanks.

Paul.

They do not sound tinny with the tech matt.  Tinny may not be the right word.  Sound was sharper, or harsher with out the matt.  Matt does not change the loundness, just makes it smoother

I have run fullsac baffles on 8 different bikes now counting my wife due to performance gains possible with pre 2017 bikes.  Heck my 13 CVO king is 138 HP and 140 Torque Fullsac DX head pipe, and 2.25 cores with the Techmatt and screens.

[Fullsac Performance]

Just finished up and finalized the new header. Finally got what I was after in the low end department.
This chart is a 107, TTS100 cams, MX Pipe, 1.75 VS 2.0 baffles. The smaller 1.75 have more TQ on the early hit and are the quietest. For me this is perfect. The 2.0 baffle has slightly more mid range and more rumble. Honestly splitting hairs.
Those that are going to keep the stock headpipe, you will need the larger 2.25 baffles to get some rumble out of it.
Adding the screens and Techmat blankets smooth the sound and drop a DB or two. If you like a harsher more aggressive sound, leave the can empty. There is no power difference either way.

And yes, that is 100 Ft pounds at 1600 RPM. The current trend with the M8 is clipping the dyno runs on the front side to hide the early TQ loss. You won't see that from us.

Steve@fullsac.com

[pvanwagner]

Just finished up and finalized the new header. Finally got what I was after in the low end department.
This chart is a 107, TTS100 cams, MX Pipe, 1.75 VS 2.0 baffles. The smaller 1.75 have more TQ on the early hit and are the quietest. For me this is perfect. The 2.0 baffle has slightly more mid range and more rumble. Honestly splitting hairs.
Those that are going to keep the stock headpipe, you will need the larger 2.25 baffles to get some rumble out of it.
Adding the screens and Techmat blankets smooth the sound and drop a DB or two. If you like a harsher more aggressive sound, leave the can empty. There is no power difference either way.

And yes, that is 100 Ft pounds at 1600 RPM. The current trend with the M8 is clipping the dyno runs on the front side to hide the early TQ loss. You won't see that from us.

Steve@fullsac.com

Nice numbers.

[pvanwagner]

They do not sound tinny with the tech matt.  Tinny may not be the right word.  Sound was sharper, or harsher with out the matt.  Matt does not change the loundness, just makes it smoother

I have run fullsac baffles on 8 different bikes now counting my wife due to performance gains possible with pre 2017 bikes.  Heck my 13 CVO king is 138 HP and 140 Torque Fullsac DX head pipe, and 2.25 cores with the Techmatt and screens.

Dave - thanks for clarifying. 

I'm sure I'm buying FullSac cores for both my wife's and my bikes.  She's going to keep her stock headers and doesn't want any changes to her engine so I'm sure we'll go with the 2.0" cores on hers.  Probably the same on mine since I'm going to keep the stock headers for a while just to make sure I don't have any issues with this engine then I'll get the FullSac headers like I did on my 2011 Limited 103".  I'd like to try and keep the engine stock for at least 6 months but I'll probably buy a FP3 again immediately.  It's hard to keep them stock. 

The itch to do cams again and everything is strong but I'm trying to hold out.

[FLSTFI Dave]

Just finished up and finalized the new header. Finally got what I was after in the low end department.
This chart is a 107, TTS100 cams, MX Pipe, 1.75 VS 2.0 baffles. The smaller 1.75 have more TQ on the early hit and are the quietest. For me this is perfect. The 2.0 baffle has slightly more mid range and more rumble. Honestly splitting hairs.
Those that are going to keep the stock headpipe, you will need the larger 2.25 baffles to get some rumble out of it.
Adding the screens and Techmat blankets smooth the sound and drop a DB or two. If you like a harsher more aggressive sound, leave the can empty. There is no power difference either way.

And yes, that is 100 Ft pounds at 1600 RPM. The current trend with the M8 is clipping the dyno runs on the front side to hide the early TQ loss. You won't see that from us.

Steve@fullsac.com

Very nice Steve!

So how do you think the header will do on a 117 with out a cam change?  Sure like that 100 ft pounds down at 1600 rpm.

[Fullsac Performance]

Very nice Steve!

So how do you think the header will do on a 117 with out a cam change?  Sure like that 100 ft pounds down at 1600 rpm.

There are gains to had with a tunable exhaust on all of the M8 engines. With the stock header your kinda stuck with what it is. The cat is in the middle and you have two grossly unequal exits. The engine does not react to bigger or smaller baffles in the left muffler, only the right muffler. Even then you can't really influence the shape of the TQ curve, and it will always have a louder right muffler. Our new stainless MX header is very similar to the DX. Symmetrical X collector, very equal flow and sound out both sides. Make a baffle change in the left muffler only and you can see it on the next dyno pull. Baffle and muffler selection will now play a big part in sound levels and the shape of the TQ curve. Choose wisely...

Steve@fullsac.com