ok another exhaust question

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May 9, 2012 | 03:48 PM

joes05dyna

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Joined: Jun 2010

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ok another exhaust question

ok another exhaust question i have a 2011 egc put on rush slips on still to quite for me my question is how are the vance and hine bigshots ?

May 9, 2012 | 03:52 PM

hairbone

Intermediate

Joined: Aug 2011

Posts: 29

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From: Oceanside Ca

they def can make some noise! and if they aren't loud enough, you could remove the baffles with 1 screw

May 9, 2012 | 03:59 PM

Pumba11

Elite HDF Member

Joined: Jan 2007

Posts: 4,020

Likes: 69

From: Twin Cities, MN

Did you remove the cat?

.

May 9, 2012 | 04:04 PM

mkguitar

Extreme HDF Member

Joined: Sep 2010

Posts: 14,744

Likes: 402

From: Phoenix '53, '88, '09 Big Twins

Quote:

Originally Posted by Pumba11

Did you remove the cat?

.

+1

with the cat in place both sound and flow are reduced.

mike

May 9, 2012 | 04:06 PM

wjl24

Road Captain

Joined: Aug 2005

Posts: 743

Likes: 4

From: Ohio

I thought you could buy bigger baffles for the ruch pipes. Check with them first.

May 9, 2012 | 04:18 PM

joes05dyna

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i did not remove cat because of possiable cross talk with o2 sensors that i read on here thats why i was thinking of going with the bigshots it a full system

May 10, 2012 | 12:03 AM

joes05dyna

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Is cross talk an issue with the 02 sensors because i have found stock pipes at good deals and i can remove cats from ,but why waste my time if it will create problems and the bigshots is a full exhaust set up correct? Or am i missing something?

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May 10, 2012 | 12:27 AM

DHubbs

Road Warrior

Joined: Apr 2011

Posts: 1,596

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From: Cherokee Co. Georgia

Quote:

Originally Posted by joes05dyna

I removed the cat from a buddy of mines head pipe. We was worried about the same cross talk possibilities with the stock head pipe. My buddy contacted Bosch. They make the O2 sensors for HD. Bosch says they reccomend the O2 sensors to be twice as far apart as the diameter pipe they are in. I measured the amount of pipe that separates the o2 sensors inside the stock headpipe with the cat removed. That measurment is 4 1/4 inch. This more than accomadates Bosch recomendations. The headpipe was installed & my buddy tuned the bike with TTS Mastertune. The bike runs great with no cross talk. I dont know where all this cross talk theory originated, but according to the manufactor of the O2 sensors it should not happen with the configuration of the stock headpipe. I am sure the collector in the stock headpipe does not optamize performance as well as some aftermarket pipes do, but I believe all this cross talk stuff is BS! If I had of known what I know now I would most likely have saved my money on the headpipe. Just passing on what I have recently learned. Hope it helps someone out there.