Exhaust Options - Suggestions

[DarkSideR]

Gentlemen,

I sold of my SuperTrapp Exhaust System and looking to get some length out of my stock exhaust.

I looked on Shop Talk and saw the 36" Truck Stacks, but I'm haven't seen anything about replacing the stock tips with 18" stacks. Seems like an easier mod with similar results.

Has anyone done this? If so looking for advice.

Regards,

Josh

[98valk]

many have including myself.

http://www.airflo.com/valkyrie.html

[DarkSideR]

many have including myself.

http://www.airflo.com/valkyrie.html

What does it take to install them?

[Houdini]

many have including myself.

http://www.airflo.com/valkyrie.html

What does it take to install them?

Buying the stacks and drilling a few holes.

[DarkSideR]

I bought the 18" Stacks. Thanks for your input.

[John Schmidt]

Just three screws, the same ones that hold on the OEM tips.

[Jess from VA]

Most make a cardboard template tube, poke holes in it where the pipe holes are, then transfer the holes from the template to the 18" stacks with a marker.  Drilling the stacks, 1st use a punch or nailset and just barely dimple them, so the drill bit doesn't walk.  Then drill a 1/8" starter hole, then the 1/4" final (if that is it, I can't remember).  New or nearly new bits is a good idea too.

My Airflow stacks were a very tight fit indeed on the existing pipes, and the edge under the OE tips needed cleaned up with 4O steel wool.  I had to rap them on with a piece of 2X4 over the tip end and rubber mallet (after rubbing a little bar soap on them for slippery).

I really think that drilling all three holes (with three bolts) is overkill.  Two would be sufficient, and even one may be sufficient (and I'd do the one on the inside, to keep the outside butt joint clean).  But I did all three as that was the common practice at the time.

If your piggie tips have been cut off previously, hopefully the one tip with the hole in it for mounting the OE/and Airflow tips remains intact.

[Jopson]

I've got 18s on mine too, think I used 2 of the 3 screws very pleased with them.
As Jess said, make sure you use a punch to mark the holes first as your drill will wander, think I just used the end of a nail.
With bags on, the join isn't obvious, certainly no worse than the OEM tip joint.
They stick out just a couple of inches past the bag rails.

[98valk]

and tape over the punch mark before u drill. helps prevent damage to chrome, bit walking and the chrome from flaking.

[Houdini]

I really think that drilling all three holes (with three bolts) is overkill.  Two would be sufficient, and even one may be sufficient (and I'd do the one on the inside, to keep the outside butt joint clean).  But I did all three as that was the common practice at the time.

I was unaware that all three was common practice when I added my stacks so I only used the front two bolts.  The stacks are an extremely tight fit and all three bolts are not necessary.  Mine have been on for 6 - 7 years and are still difficult to get on or off.

Matter of fact Darksider, be prepared to have to sand and maybe grind some on the mufflers to be able to get the stacks to slide on.

[DarkSideR]

All great insight and suggestions guys. Thank you much.

My bike is going through a bit of a transformation. I sold off my beloved SupterTrapp Exhaust system, and my LeatherLyke Saddlebags. I put the factory exhaust back on, and just got my OEM Hardbags back from the paint shop. Adding stacks, and a set up Grumpy's Tips is going to really transform the bike.

Pictures to come..

[Relax]

Nice look with those stack

Does it do anything with the sound?
(I have cut the piggies and drilled the baffles allready)

[davit]

Nice look with those stack

Does it do anything with the sound?
(I have cut the piggies and drilled the baffles allready)

Yes, the sound will be deeper and louder, a little bit raspier.  Grumpy's tips will mellow the raspiness.

[Jess from VA]

I only had the stock IS tips on for a month or two before I switched.  

It's not a big difference, but the wide open 4" stacks do have just a bit more rumble than the pinched-end stock tips do.  (box stock pipes).  

My other bike came with the same Airflow tips and cut piggies (but nothing else), and I would guestimate the added rumble from the tips is a bit more with cut piggies.  

With my unmolested pipes, once up and running down the road, it's still pretty quiet.  But I have been told that my cut piggies are louder than I think (from the driver's seat) when running down the road (by guys running behind me).

With loud drilled baffles and cut piggies, I'm not sure there would be much noticeable difference.   Of course the Airflow tips are a vast improvement in looks and chrome quality from the thin OE tips.

I've never had any raspy sound from either of my bikes; I think that comes with drilled baffles. 

[Tfrank59]

I also have 18" truck stacks on mine, the turned-out style ones, and they made the exhaust note a lot throatier.  In fact, after about 2 months of it last summer, I decided the ringing in my ears (tinnitus) was cause enough to return to the stock tips.  Still, I love the look of the stacks and if I could just quiet them a bit I'd be happy, so I made some ss screens and adapters for the ends (see video), which then allowed me to wrap some exhaust packing around the piggies inside, and the screens would keep anything from falling out the ends.  so I've been running the bike like that since around Christmas, and now I feel it needs just a bit more packing in there to deaden the sound some more.  I'll probably get into it in the next month or so and add some packing, sort of tuning the sound to what I want.

https://www.youtube.com/watch?v=jqdJDvB_2Jg

[Jess from VA]

I like the flat cuts better than turnouts or downs.  That may just be a question of personal choice on looks, but (all other things being equal; like cut pigs) I'm sure the flat cuts are quieter than all the turns.  All the noise is out the back, and away as you ride down the road.

Turning them down bounces the noise off the pavement, right up to your ears. 

[Houdini]

I also have 18" truck stacks on mine, the turned-out style ones, and they made the exhaust note a lot throatier.  In fact, after about 2 months of it last summer, I decided the ringing in my ears (tinnitus) was cause enough to return to the stock tips.  Still, I love the look of the stacks and if I could just quiet them a bit I'd be happy, so I made some ss screens and adapters for the ends (see video), which then allowed me to wrap some exhaust packing around the piggies inside, and the screens would keep anything from falling out the ends.  so I've been running the bike like that since around Christmas, and now I feel it needs just a bit more packing in there to deaden the sound some more.  I'll probably get into it in the next month or so and add some packing, sort of tuning the sound to what I want.

https://www.youtube.com/watch?v=jqdJDvB_2Jg

Extend your piggies as far as you can to reduce the droning.  I extended mine outside of the truck stacks and that made her quieter than stock.

[Tfrank59]

yeah, I tried to do that, per someone's good suggestion here, but I wasn't a good enough pipefitter to pull it off. The piggy extensions looked like crap    I'll just stick with the packing-around-the-piggies method

[Tfrank59]

I like the flat cuts better than turnouts or downs.  That may just be a question of personal choice on looks, but (all other things being equal; like cut pigs) I'm sure the flat cuts are quieter than all the turns.  All the noise is out the back, and away as you ride down the road.

Turning them down bounces the noise off the pavement, right up to your ears. 

yeah, I tried them turned down--not for me, either looks or sound.

[DarkSideR]

I can't get to Photostash so here is a link to pictures I posted on the VRCC Facebook site. Let me know if the link doesn't work.

https://www.facebook.com/groups/109339477726/?multi_permalinks=10155347334432727&notif_id=1521677351505331&notif_t=feedback_reaction_generic&ref=notif

[Houdini]

I can't get to Photostash so here is a link to pictures I posted on the VRCC Facebook site. Let me know if the link doesn't work.

https://www.facebook.com/groups/109339477726/?multi_permalinks=10155347334432727&notif_id=1521677351505331&notif_t=feedback_reaction_generic&ref=notif

Link works, I like the color combo, looks sharp.

[Relax]

http://store.airflo.com/af40-418hs.html

Is this the ones that will fit my Valk, standard ?

Still 3 feet snow outside, but I am tempted to modify my exhaust.
( I have now standard exhaust, drilled baffles and cut piggies, original end tips. Hopefully I get a bit deeper rumbling ?)

[Jess from VA]

http://store.airflo.com/af40-418hs.html

Is this the ones that will fit my Valk, standard ?

Still 3 feet snow outside, but I am tempted to modify my exhaust.
( I have now standard exhaust, drilled baffles and cut piggies, original end tips. Hopefully I get a bit deeper rumbling ?)

Yes sir.  (a set on each of my bikes)

They were $42 when I got mine.  Been a while.  

The chrome on the flat cut edge is good, but needs attention from time to time.   I used to try and keep the inside shiny for about an inch.  That was foolishness, and I quit. 

[MarkT]

I think it looks best flat black and then you're not fighting the soot.  Use VHT spray paint and go for a ride to cure it.

[Relax]

I think it looks best flat black and then you're not fighting the soot.  Use VHT spray paint and go for a ride to cure it.

Is the VHT paint for the inside of the tips to make the surface stronger and more easy to keep clean,,,or for the whole tip?

[Houdini]

I think it looks best flat black and then you're not fighting the soot.  Use VHT spray paint and go for a ride to cure it.

Is the VHT paint for the inside of the tips to make the surface stronger and more easy to keep clean,,,or for the whole tip?

It's for the inside of the stacks and the tips, to make everything flat-black and soot-like, to negate cleaning inside the stacks.

[Houdini]

I just finished my stack/tip upgrade.  I used an idea I saw on here where a rider wanted to make his piggies smaller to get rid of drone, I did mine because I used 3/4'" copper and they just looked too small and didn't end up very symmetrical sticking out of the stacks.  This is 3/4" wrapped in 1 1/4" copper, very snug fit in the grumpy's and sticking outside of the stacks resulting in no drone.





This setup is quieter than stock, I plan on painting them black next time I'm working on her.

[Jess from VA]

That is very nice work, and pretty awesome looking too. 

The bells are interesting, one hanging lower than the other.  Which reminds me..... (never mind) 

[Hook#3287]

They look like the business end of a A-10 Warthog.

[The emperor has no clothes]

They look like the business end of a A-10 Warthog.

they do !

[Jess from VA]

An A-10 Warthog.


But just look at what kind of whoop-ass that 40mm GAU-8/A Avenger Gatling gun really brings.


Just like pulling the valk rear wheel and punkin, when the gatling is removed from the A10, a jack has to go under the back end first or it will tip over.

I've got some 40 mike brass.  It doesn't fit in my Dillon press.  

[Hook#3287]

Thanks for the post Jess

The warthog is my second favorite military plane, after the P-51.(w/Merlin )

That Gatling is awesome

[Houdini]

That is very nice work, and pretty awesome looking too.  

Thanks Jess

The bells are interesting, one hanging lower than the other.

♪ ♫ Do your bells hang low, can you tie them in a bow.... ♫ ♪

They look like the business end of a A-10 Warthog.  

There's a kit for that -


http://tailgunnerexhaust.com/?product=stealth-fighter

I'd bet it could be adapted to fit in a 4" truck stack.

[Jess from VA]

I've seen those on a FL Valk in the past.

A bit spendy, and I bet a bit heavy.

[Relax]

 
the original exhaust on my Valk, standard, 2001 is 4" , right?
( My Valk is on a stock house far away, I can't get  there to check)

[Hook#3287]

the original exhaust on my Valk, standard, 2001 is 4" , right?
( My Valk is on a stock house far away, I can't get  there to check)

4" truck stacks fit over the tail end of OEM pipes very nicely

[Relax]

the original exhaust on my Valk, standard, 2001 is 4" , right?
( My Valk is on a stock house far away, I can't get  there to check)

4" truck stacks fit over the tail end of OEM pipes very nicely

Thanks
Then I place the order

[DarkSideR]

Here is the finished product with the 18" Stacks and Grumpy's Drilled Tips.

https://www.facebook.com/photo.php?fbid=499035530494027&set=p.499035530494027&type=3&theater&ifg=1

[Relax]

Info from Airflo.com:


The "Valkyrie" stack # is a # that we attached to them when they were being made for that application, BUT Dyna flex does not make them for us anymore as "Valkyrie" stacks,  so the 24P # is what they make them under now, as just generic stacks, Only difference is the current 24P series stacks have Dynaflex logo on the part, the Old "Valkyrie" stacks did not,

And I was told:

# 24P-40018CP should be the  4" x 18" flat cut tips that fit the Valk original exhaust

[MarkT]

That is very nice work, and pretty awesome looking too.  

Thanks Jess

The bells are interesting, one hanging lower than the other.

♪ ♫ Do your bells hang low, can you tie them in a bow.... ♫ ♪

They look like the business end of a A-10 Warthog.  

There's a kit for that -


http://tailgunnerexhaust.com/?product=stealth-fighter

I'd bet it could be adapted to fit in a 4" truck stack.

I have installed the Tailgunner rotating barrels mod in 5" stacks for customers several times.  I didn't think they would fit in 4" but Tailgunner says that's what they use.