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Discussion Starter · #1 ·
So is this the pre cat? If so, can I just dig in there to pull it out with some tools or will I screw somethin up? If it's not, then who put all the cardboard in my pipe?

(2007 mid pipe from the new exhaust system..)

C-Dub
 

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Holy shit!

That has to be some kind of packing material they forgot to remove before connecting the midpipe? I mean it's blocking the whole damn bike.
 

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Its a catalyst. Just like in the factory cans. Bad for exhaust flow and sound. I believe emissions regs tighten slightly in '08, and I would bet that is there to help meet regs. It could be removed pretty easily, and would make a difference. I would get an old chisel with a rounded face, a hammer, and some grinding tools. The walls of the midpipe are pretty thick there, and would be hard to screw up. May want to think about tuning for it though. The bike may run lean afterwards, especially on top. Devi could answer this better than me...
 

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Yeah. Definitely need to get that out. Looks like a lot more dramatic restriction than the precat on 05-06 models.
 

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It seems the CAT cans are getting crazier every year. I'm sure we will soon see a Ducati style king size colostomy bag hanging under the bike somewhere.

Considering how ugly the stock headers are and where they are headed, it seems a bit strange that there is such a limited availability on aftermarket headers & midpipes.
 

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Yep, Stuck is right -definitely a rolled catalyst, just like in the stock silencers. If it were a honeycomb design is would work better and restrict flow less.
 

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Devi - How do you think they install that? Looks like maybe they swage the end of the tube down after inserting the cat? Drill out the center then twist it tighter to reduce the OD & slide it out?
 

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Must be the emmisions regs like Kansas said, the 2007 GSXR 1000 has a similar catalyst in it's exhaust.
 

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dr_gallup said:
Devi - How do you think they install that? Looks like maybe they swage the end of the tube down after inserting the cat? Drill out the center then twist it tighter to reduce the OD & slide it out?
The 2007 header is built differently. If you look close at the photo above, you can see that the collector tubing is two parts that are press rolled together, and then the end is added. The catalyst can be put in before the end is welded in place, or before the two parts are pressed and rolled together - just like on a cat for a car.

If the catalyst is fairly narrow, you can likely slide it out by unrolling from the center. If it is several inches wide (as I suspect), this will be difficult, and cutting will likely be required.

All this would be less of an issue IF they used a honeycomb-type catalyst that flows very well. With a ceramic coating on the piping, and a well designed catalyst, a 500 rwhp car loses less than 10 hp. That is a negligible amount of power - especially for a vehicle that burns VERY clean.

I am all about clean emissions WITH improved performance, but it will be a while until the OEMs figure out that a well designed catalyst and exhaust system can actually benefit them and their sales. Right now, each only does what is mandatory to get them but each years regulations.

If Triumph were to redesign the exhaust and spend a couple of dollars more on the exhaust, they could tune the bikes for greater performance and SELL MORE BIKES. This would greatly offset the additional costs, and the bikes would burn even cleaner than they currently do. They could work WITH the aftermarket and enthusiasts instead of changing the parts every year or two, and we all benefit. Sorry, RANT OVER. :)
 

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They claim couple of hp more power for the '07 so the exhaust cannot be THAT much more restrictive. The little I know about emission equipment is that the rolled catalyst is a cheaper version of the honeycomb but with nearly similar flow. The early pellet type cats were horrible. The bad reputation of power robbing cats has its roots in the pellet ones.

The common knowledge with bike enthusiasts worldwide is to rip every emission control device automatically out of the bike without knowing how they work, what they do and do they affect power or not. I am with Devi and a powerful and clean engine is the way to go.
 

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The big restriction in the exhaust is the stock silencers. So the midpipe on the later bikes is likely not going to change this much - if at all.

I am under the impression that the 4 hp gain for the 2007 bikes is from the Arrow 3-1 system - not on the standard bike (this may easily be incorrect). The last dyno charts I saw for a 2007 model in a magazine showed the same power as the 2005-2006 models. But it is possible that even with the catalyst in the midpipe, the improved tuning (not much) of the later ECU may give the added 4 PS.

Until we see a member dyno his 2007 model we will likely not be sure about this. If you compare the early and late 1050 tunes, they are nearly the same, so I would expect the same peak output.

I do wish Triumph would change to the honeycomb catalysts though, we could do a lot with a good silencer on the stock bike. The stock silencers get HOT, and stay that way for a long time - compared to other silencers.
 

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Discussion Starter · #14 ·
Devious said:
The big restriction in the exhaust is the stock silencers. So the midpipe on the later bikes is likely not going to change this much - if at all.

I am under the impression that the 4 hp gain for the 2007 bikes is from the Arrow 3-1 system - not on the standard bike (this may easily be incorrect). The last dyno charts I saw for a 2007 model in a magazine showed the same power as the 2005-2006 models. But it is possible that even with the catalyst in the midpipe, the improved tuning (not much) of the later ECU may give the added 4 PS.

Until we see a member dyno his 2007 model we will likely not be sure about this. If you compare the early and late 1050 tunes, they are nearly the same, so I would expect the same peak output.

I do wish Triumph would change to the honeycomb catalysts though, we could do a lot with a good silencer on the stock bike. The stock silencers get HOT, and stay that way for a long time - compared to other silencers.
Should we make a full road trip project out of this if it can benefit others? Road trip to Birmingham? Consider going from stock to full custom in one shot or in steps? Just thinking..
 

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I seriously doubt Triumph would hire me - "does not work and play well with others" has been said of me before. :)

I am seriously thinking about opening a bike tuning shop and getting an eddy current dyno with gas analysis. I am trying to justify the outlay of costs right now, and determine the local market for it.

"Power-Tripp Performance" is getting closer to reality.
 
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Well, considering you don't "work or play well with others" you'll probably need a customer service rep--since most guys would probably think I'm better looking than Cheap.......... :twofinger:
 
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