Delkevic exhaust

superjim · Jun 4, 2015

http://www.delkevic.us/

I thought it would be best to start a new thread specifically on the soon to be released Delkevic exhaust for the Valkyrie. The thread started under New Prototype.

The parts for the Valk are in production now and are expect to be ready in about a month; so early July. It will allow any of their mufflers to be used according to Delkevic, from 8" to 18".

I was already in the process of finding a way to mount the 9" oval muffler from the Suzuki SV650 kit. I received the kit yesterday and did a quick and dirty mount just to see how it looks. I think it will be exactly the look I am after. I may continue or I may wait for the Valk specific intermediate pipe. It will be interesting to see what they plan to do with the stock shroud (cover) between the cat and the muffler. I so sure will want to retain it. I have some ideas on how to attach it either way.

In the following pic, I don't have it completely where it needs to located but you can get an idea of what it will look like. Very nice quality. This particular muffler has a full size outlet (2.5" I think). On the inlet there is a removable db insert so you have the option of quiet or loud. The insert is not as restrictive as some I have seen so hopefully it will not restrict hp much. I plan to dyno with it in and out to see.

Also note the down turned outlet. That would allow even the short mufflers to be used if you intend to attache saddle bags.

st2sam · Jun 4, 2015

Jim, you are the man.

I like that fact it's not in the way when changing shaft lube.
I like the fact it'll shave at least 10lbs. off. (?)
I like the fact it'll probably sound good?

I don't like that the chrome shield is bigger than the can.

Maybe if the shield was shorter or than can was inside the shield a bit?

These are a few things I'll do when I order the cans.
OK one more, maybe a can 2-3in. longer? It's a big bike, and again IMO a little longer can might look better.

Thanks for sharing this Jim...

Surfndad · Jun 4, 2015

I agree with all the above, If the shield was black it might match up a little better. I had some hardware power coated satin black that might be a good match when I get the windshield mounted I'll put some pics up of the satin black. Also I don't think that can was made for the F6c when they come out with our unit it might line up better.

superjim · Jun 4, 2015

The can was not connected to the exhaust in that picture so it sticks out away from the shield. My plan would be to have the can tucked just inside the shield. One possible issue it round shield/oval can. That's why I want to see what Delkevic has planned for the shield. I agree, may have to paint the shield black. The great thing is there will be several options on cans for the Valkyrie system when complete.

Here's another note: It would be sooo easy and sooo nice if Delkevic would offer an "off road" or "race only" option to eliminate the cats at the same time. It would be easy to have the intermediate pipe connect at the header and eliminate the cats all together.

Surfndad · Jun 4, 2015

That what the TWO BROTHERS cans where like on my 1998. They supplied a set of three into one single walled headers that connected straight to the cans.

goldstar903 · Jun 5, 2015

I sure would love to have these slip-ons! They sound like a super Porsche!

http://www.twobros.com/sku/005-41504/exhaust/Hon-F6B_15_SO.html

goldstar903 · Jun 5, 2015

Hey Superjim, have you fired up that Delkevic slip-on? >

Sound clip?

goldstar903 · Jun 5, 2015

I just spoke to Two Brothers Racing and they eluded to maybe having something for the F6C by September?

GA VALK · Jun 6, 2015

Slip-ons with Torque Loopz from Jimmy Sones at Torq Master Pipes would be cool!

goldstar903 · Jun 6, 2015

Those are pretty decent too. If someone would just produce them! :crying:

superjim · Jun 7, 2015

goldstar903 said:
Hey Superjim, have you fired up that Delkevic slip-on? > Sound clip?

No I have not. I have not even connected it to the pipe yet. I decided to go ahead and order the second SV650 kit and install them both. I can make the intermediate pipes work with a reducers but note I have removed my cats. The 2nd kit arrives this week and I will install them and get some good sound clips. Maybe even next weekend some sound clips on the dyno with and without the DB inserts. I expect with no cats and no inserts it will be a little loud.

goldstar903 · Jun 7, 2015

Good deal!

superjim · Jun 7, 2015

here's a few pictures of the muffler, the db insert baffle and the intermediate pipe with the reducer that will mount just downstream from my O2 sensors with cats removed.

goldstar903 · Jun 7, 2015

Looks like a nice setup. Looking forward to the finished fabrication and sound bite!

GA VALK · Jun 8, 2015

How/what did you use to bypass the cats?

superjim · Jun 8, 2015

superjim · Jun 9, 2015

This is the original thread.

http://www.f6cforum.com/forum/30913-post.html

superjim · Jun 9, 2015

GA VALK said:
How/what did you use to bypass the cats?

Original thread:

http://www.f6cforum.com/forum/129-h...h-talk/6546-custom-exhaust-modifications.html

Surfndad · Jun 9, 2015

So what if you want to use your stock cat? will there be any issues with throwing those cans on with no other changes? like have it dyno tuned of remapped?

superjim · Jun 9, 2015

Surfndad said:
So what if you want to use your stock cat? will there be any issues with throwing those cans on with no other changes? like have it dyno tuned of remapped?

In the picture I first showed with the muffler in place, but not attached: At that location, the muffler inlet is just about touching the location for the exit of the cats, with no intermediate pipe. So I expect the intermediate pipe that Delkevic will supply for the Valk will be very short. Even then, I think the muffler will be mounted a little further back than where I had it. That means there will be a larger gap between the muffler and the shield or else the shield changes or goes away. That's why I decided to go ahead and use the Suzuki SV650 intermediate pipes and mount it right behind the O2 sensors. That will allow me to mount the muffler snug against the shield where I want it.

As for the dyno tune, it should not be required. The O2 sensors will adjust to maintain the current a/f ratio. Now a dyno tune can optimize the a/f ratio but it's really not worth it for the cost and labor to install the dyno jet power commander and dyno tune it. The better option would be to have Gulh reflash your ecm with his tune for modified exhaust with a/f ratio AND timing adjustments AND limiters removed.

Delkevic exhaust

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