Well, I didn't think the heat issue was bad till yesterday! Right leg was getting pretty warm in traffic. Guess that means I'm a candyass! lol Out on the road it was running 182 at the lowest (at 70) and going over 200 cruising at 45mph, and at stop lights it would jump right up there before I even stopped rolling, ending up at around 215 and higher. Really didn't think the cat would make that much difference! Well, I decided to remove it yesterday and gut it. It does make a big difference! BTW, the bike has over 2000 mi. and I'm running full syn oil. The heat is very minimized now! I believe there will always be some (nature of the undertail). There is always a price though! I've notice a slight decrease in torque in the 2-6 grand area. Barely noticeable, but there! Might be running just a tad leaner (without the cat) because of less restriction. Can't tell any difference anywhere over 6 and up though, except now it runs around 174 degrees and doesn't skyrocket at stoplights either (never hit 200 sitting at light)! Cools right down also once you start moving again. A Power Commander will probably cure the drop in power! If you haven't done it, you might want to consider it. Anyone else had similar experience?
RTSR1
i am glad to hear the bike runs cooler because i am down in south florida and the bike is running like i am driving on the sun. you are so right about the temps starting to climb when you are comming to a stop. my fan is running all the time. i ordered the y addapter for my slip-ons wich i should have done before, i am not to kean on punching out the cat, im just not sure about the large chamber after its gone. i am just glad to hear its running cooler.
Yeah, I was going to buy the Akrapovic piece, but it won't fit up to the stock cans! Seems to run just fine other than the slight drop in torque like I mentioned earlier! I guess I'll get a Power Commander now! lolmadtroy said:
This is good info. It seems you would end up creating a big expansion chamber by gutting it, so I am glad that a decerning guy finally did this.RTSR6 said:
But I want to know about the Akra piece. I would expect it to work, so did someone tell you that or did you try it. The reason I ask is their slipons mate to the stock piece so the outlets have to be the same diameter and placement. And the Akra piece would have to mimick the stock inlet to join the collector as well as the outlets since their slipons fit the stocker.
So what is the diff?
Well, I called McCoy's and was going to order one and that is what I was told. Said (not sure who) they sold one and it came back because the piece was bigger than the cans (maybe need to remove S/S gaskets?), don't know. I was talked out of it! Maybe Shane can expand on this? Their site does say that that slip ons will fit either! I was just going on what I was told! As for the bulge in the stock piece, I thought the same and after further exam figured it can't hurt much cause it's there before and after the cat anyway! Hopefully Shane will see this thread!erixR1 said:
The akro "Y" pipe is made for the akro slip ons. That is the info they gave us.. and the reason we don't spec them for the stock systems is exactly what they told you on the phone (they don't mount right up according to customers real world experiences), in theory it should work but it just doesn't from the feedback we've gotten.. We got the one returned and used the experience to not spec them like that for sale. I haven't tried it ourselves because the majority of the installs we do at the shop are full systems and we run Graves systems on our shop bikes... 
Thanks for the replies gents.
Shane, if that returned item is in the shop still, or you have others laying about, would it be possible to get the outlet tube diameter on the Akra piece? I'd appreciate it.
Shane, if that returned item is in the shop still, or you have others laying about, would it be possible to get the outlet tube diameter on the Akra piece? I'd appreciate it.
We sold it as a discounted rate (the returned one) and the "Y" pipes are out of stock until mid next month. We buy them out everytime they come into the country.. Check into the Graves slip os for those of you that haven't purchased yet... They come standard with the pipes to remove the cat and have ovals and round cans now...
:bsRTSR6 said:
I really have a hard time believing this. The cat has nothing to do with the engine coolant temp at idle. By removing the catalyst you are eliminating the 'fire' inside the exhaust pipe (the catalyst actually re-burns the exhaust fumes) and getting rid of it would lower the exhaust pipe temp. I have a hard time believing that this would lower cylinder head temps enough to notice. If the fuel computer can automatically correct for the lower exhaust pressure, then the efficiency of the engine may increase and lower temps, but I don't believe that the stock computer can correct for a volumetric efficiency change (otherwise we wouldn't need the power commanders).
The best way to lower engine temp at idle is with a manual fan override switch. Anyone tried wiring a solenoid to the Neutral light circuit? I would be cool if the fan was always on when you were in neutral.
The wife and I have rode this bike about 1500 miles now. I haven't even noticed the heat, and the wife hasn't complained once. What a bunch of whiney babies!:rant
BTW, the engine isn't running hot at 215. It was designed to run at these temps at idle. I would be curious to see what the HP gain is with the cat removed and the PCM added.
Re: Re: '04 Cat Removal, my observations!
Well, all I can tell you is what mine is doing! If you don't like what I've put out, don't read it! I've got over 2000 mi. on mine and with 95 degree ambitant temp with a heat index of 105 you might change your mind! I did! It has made quite a difference in engine temp. Oh and btw 215+ is hot in any engine!
aronhalt said:
Well, all I can tell you is what mine is doing! If you don't like what I've put out, don't read it! I've got over 2000 mi. on mine and with 95 degree ambitant temp with a heat index of 105 you might change your mind! I did! It has made quite a difference in engine temp. Oh and btw 215+ is hot in any engine!
Re: Re: '04 Cat Removal, my observations!
question when I talked to him on June 12th. He told me you will
not see any HP gains with the cat taken out. This is on a non
race bike of course like the ones we all ride. I didn't ask him about
the PCM added. The man really knows his stuff.
I had the same question, so I asked Chuck Graves that veryaronhalt said:
question when I talked to him on June 12th. He told me you will
not see any HP gains with the cat taken out. This is on a non
race bike of course like the ones we all ride. I didn't ask him about
the PCM added. The man really knows his stuff.
Re: Re: Re: '04 Cat Removal, my observations!
If you read the 1st post, you'll note that I was doing it for the heat issue. I also stated that it seem to remove a slight amount of torque (power) that was minimal. The drop in running temp and the reluctance to skyrocket to the sun at the light was greatly reduced! There is no noticable HP gain or drop on top. Just in the 2-6 grand area and ever so slight, but noticable due to the reduced back pressure possibly. I have a power commander on order and I'll see what that does!Skeeter said:
Re: Re: Re: Re: '04 Cat Removal, my observations!
Yes, please let us know what your conclusion is with the addition of the Power Commander.RTSR6 said:
LOL! I was wondering when you'd chime in! lol I was ok till Sat. The air was for shit with a heat index of 105! Yeah it got a little toasty! Cat removal fixed that!Big Daddy said:Ok Candyass whats the deal with the Bun & Thigh warmer?? gettin a lil toasty under there....
BD
You know, I dont know if I'd be tellin everyone that kind of personal info. You better make sure your wife doesn't find out.Big Daddy said:
After reading you post on removing the cat i decided too remove mine today.I just picked mine up last saturday and put 300 miles on it.I love eveything about this thing except the heat coming from the seat area.So before even taking her out this morning i did the deed and boy what a difference!!! I spent about two hours in the saddle today with no heat problems what so ever and too me the engine seems slightly stronger with an edgier exhaust note.
Well, if you liked that, now put in a PCIIIusb. Makes the bike run even smoother and seems to run a little cooler also! I'll know for sure tomorrow. Just did that today. Fixed the slight loss in lower RPM's I noted in the first post, but the smoothness is the biggest improvement. It was pretty damn smooth before! lol You are right though, the CAT removal is well worth it as far as the heat goes!R1RON said:
Did the PCIII help out with the 4500-5000 RPM surge? Today I noticed the heat. Alot of the heat comes off the engine and right on my legs. Can't do much about that. I will gut the cat out when I get a chance though. Seems like it helps out alot with the engine heat.
I've never noticed a surge at 4500. The PC just makes the bike smoother thru-out rpm. You still get some engine heat, but at least the 500 degree (or whatever temp) potato cooker doesn't radiate under your ass anymore. I'll post later after a ride today and see if the PC dropped the engine temp anymore. The CAT removal definitely dropped it.Lestat77 said:
How long does the cat honeycomb removal take? When I decatted the uppipe in my WRX it took nearly 2hrs of pounding
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