Cat delete, useful?

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monkydad
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Cat delete, useful?

Post by monkydad » Fri Dec 11, 2015 3:29 pm

Hi all, what does a cat delete do? Any real benefits or is it just an "up yours" to the "Man"? 8)
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rivers
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Re: Cat delete, useful?

Post by rivers » Fri Dec 11, 2015 3:58 pm

Just losing or gutting the cats alone won't make a noticeable seat of the pants difference so it's just an "up to you" thing, just don't expect much. The cats aren't really all that restrictive and don't really hurt anything as is. IMHO if you're not going with a complete intake and exhaust mod I'd just leave the cats alone.
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monkydad
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Re: Cat delete, useful?

Post by monkydad » Fri Dec 11, 2015 4:50 pm

Thanks, does the engine/cylinders run cooler, or no real effect on that?

I'm looking to lower temps, as I live in Phoenix, AZ
2014 Gear Up, 2012 BMW R1200GS, 2003 Harley Davidson Deuce

glenn s
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Re: Cat delete, useful?

Post by glenn s » Fri Dec 11, 2015 4:51 pm

I found that rear wheel removal is much easier with the mid pipes removed. According to my temperature gauges the bike runs a little cooler. I prefer the overall look with the pipes in the
more foward position. I rotated the mufflers slightly and have no clearence issues with center
stand or kickstarter.
2011 Ural "T"
2013 branch pipes
Yamaha manual petcock
Mid pipes removed
2 needle shims
42/128 jets
1996 Triumph T - Bird
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GHGoodwin
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Re: Cat delete, useful?

Post by GHGoodwin » Fri Dec 11, 2015 6:10 pm

Make a test fit first. You might have to tinker with the car side hanger to get the header and muffler lined up. If you look closely at the front of the muffler you'll see that the muffler intake at the cat junction is off angled a bit so they line up.

I haven't done my '14 but on my '12 (and other pre-efi bikes) we simply rotated the muffler a bit and then hammered it onto the header.
Hal

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Re: Cat delete, useful?

Post by 02twincam88b » Fri Dec 11, 2015 9:37 pm

My cats escaped but the mid pipes stayed. The only noticeable difference is a slightly cooler running temp. IMHO
2013 Ural T
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Re: Cat delete, useful?

Post by RobH » Sat Dec 12, 2015 10:07 pm

I found the exhaust on my 2014 was cooking my size 13s until I got rid of the cats. Seat of the pants for sure, but my feet are no longer complaining.

I just gutted the cats and put the empty cases back on. Looks oem but isn't.

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Ernest Becker
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Re: Cat delete, useful?

Post by Ernest Becker » Tue Dec 15, 2015 9:33 am

monkydad wrote:...any real benefits or is it just an "up yours" to the "Man"? 8)
Ha!
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Re: Cat delete, useful?

Post by Ernest Becker » Tue Dec 15, 2015 9:36 am

Actually, some would argue that merely gutting the (modern, free flowing) cats will reduce performance by introducing a exhaust-velocity-slowing chamber. This would suggest that cat removal (not gutting) would be preferred when saying up yours to the Man. Granted in a piggy like the Ural it probably won't make the slightest difference in performance.
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Re: Cat delete, useful?

Post by barnone » Tue Dec 15, 2015 11:15 am

My cats are still intact because of a remark from Dave (?) from Ural that said dyno results were better with the cats in place. I had them off for a while when I installed the Modtop mufflers and then put them back on and didn't notice any difference in performance. Still pulled my test hill in the mountains in 4th gear no problem either way.

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Re: Cat delete, useful?

Post by 4REICH » Sun Apr 23, 2017 10:58 pm

After removing the cats, drilling the slides, and installing k and n cone filters the 750 solo has much more get up and go. I am still playing with jetting. Next modification will be sportster mufflers, maybe a dyno tune
2013 Ural ST
1994 red star
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