GWR header and RSQ on NC making popping sound on gear change

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GWR header and RSQ on NC making popping sound on gear change

Postby russs » Wed Oct 27, 2010 2:49 pm

GWR header and RSQ on NC making popping sound on gear changes. (Stock midpipe, O2 sensors relocated correctly, no warning light problems.) Is this a problem, how can it be fixed?
Russ
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby Brian » Wed Oct 27, 2010 5:26 pm

It is not a problem. It was always there before....you just didn't hear it with the stock exhaust.

When BMW designed the MINI they engineered the exhaust on the MINI to let out the pops on shifting for the vintage sporty feel that modern restrictive exhausts have largely eliminated. You must be a lot younger than I am...or at least younger than some of the vintage machines I drive and race. End of my day and heading home on my Buell.....this thing really pops on throttle close!
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby slartibartfast » Thu Oct 28, 2010 10:23 am

I just had the header installed and I love that pop. The GWR mid-pipe and RSII Dual let it our proudly! I think race engine, not vintage sports car.
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby matthew-m » Sat Oct 30, 2010 9:48 am

Can I get the popping sound without the header, since California won't let me install one? Or can I add the header and do something else to avoid failing smog checks?
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby russs » Sat Oct 30, 2010 5:44 pm

Thanks Brian. And no, Im not younger than you. Also not younger than the cars you dive, unless they are pre 1949. I remember the popping in my old minis and Sprites with big exhaust systems, but just didn't expect so much of it on every gear change over 3000 rpm. Will get used to it. The extra bit of urge from 3500 to 6500 rpm is worth it.
Now to look and tokicos and progress springs.
Russ
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby mikeytx » Sat Oct 30, 2010 5:58 pm

matthew-m wrote:Can I get the popping sound without the header, since California won't let me install one? Or can I add the header and do something else to avoid failing smog checks?

Eat lots of beans ....................... :roll: :mrgreen:
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby bluemeany » Fri Nov 05, 2010 11:15 am

I recently rode in MXGeorges turbo car and it sounds like a 22 being shot every time he shifts. Mine just has a pop, but I love that pop.
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby matthew-m » Sat Nov 06, 2010 10:41 am

Would a muffler change affect this change, or does the two cats ahead of the muffler prevent the popping?
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby Brian » Sat Nov 06, 2010 10:56 am

The more open the system, the more likely you hear the pops. George's turbo MX5 has additional reasons for the pops, a custom calibration setup, etc.
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Re: GWR header and RSQ on NC making popping sound on gear ch

Postby bluemeany » Sat Nov 06, 2010 5:42 pm

Yeah, george has nearly no muffler and a 3" exhaust. Don't think there are any cats either.
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