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New CMS bypass arrived! Nice pipe!

 
Old 01-18-2019, 09:23 PM
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Waxer
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Default New CMS bypass arrived! Nice pipe!



My new CMS bypass arrived. Scavenging exhaust design. According to their dyno runs there is a 14+hp and 14+lbs/trq increase. Packed nicely with all quality hardware.
Will have to wait for spring to to on due to weather for install

Here are some pics. Very nice workmanship with hydro-formed elbows. Sound will be like GMG bypass for reference.


https://competitionmotorsport.com/cm...he-gt3-rs-911r
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Old 01-18-2019, 09:25 PM
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Old 01-18-2019, 09:26 PM
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Pic they sent me installed on GT3.
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Old 01-18-2019, 09:30 PM
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Identical to BBi.
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Old 01-18-2019, 09:37 PM
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Nice!
I will install mine as soon as I get it!
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Old 01-18-2019, 09:48 PM
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Originally Posted by WantA997 View Post
Identical to BBi.
Not identical but very similar.
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Old 01-18-2019, 10:30 PM
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Looks well constructed and a nice piece for sure.

But, why are they the only company claiming power increases where as GMG, BBi, Fabspeed, Sharkwerks, GRP, Akrapovic, and AWE don't claim or make any mention of power increases?

Everything on the 991 GT3 Cup's shows removing the center muffler actually drops power - center muffler with side bypass being the strongest performing setup. Supercup pipes being the lowest performance which is the setup with no center muffler.
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Old 01-19-2019, 12:19 AM
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Originally Posted by redmonkey928 View Post
Looks well constructed and a nice piece for sure.

But, why are they the only company claiming power increases where as GMG, BBi, Fabspeed, Sharkwerks, GRP, Akrapovic, and AWE don't claim or make any mention of power increases?

Everything on the 991 GT3 Cup's shows removing the center muffler actually drops power - center muffler with side bypass being the strongest performing setup. Supercup pipes being the lowest performance which is the setup with no center muffler.
Some center bypasses don’t increase and may decrease hp slightly depending on design. True.

CMS design has an X flow scavenging effect. They sent me the dyno sheet.



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Old 01-19-2019, 01:09 AM
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Originally Posted by Waxer View Post
My new CMS bypass arrived. Scavenging exhaust design. According to their dyno runs there is a 14+hp and 14+lbs/trq increase. Packed nicely with all quality hardware.
Will have to wait for spring to to on due to weather for install
https://competitionmotorsport.com/cm...he-gt3-rs-911r
Looks great, spoke with Pete on Wends...mine should be here next week. I’ll be installing it when I receive it. Will keep you posted on how it goes...JB
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Old 01-19-2019, 01:22 AM
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Very cool, the x-flow design looks interesting!
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Old 01-19-2019, 03:33 AM
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@waxer can you retain the valves with this setup or no? My point is after installing can you still use the PSE button?
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Old 01-19-2019, 07:52 AM
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Originally Posted by GT3 KSA View Post
@waxer can you retain the valves with this setup or no? My point is after installing can you still use the PSE button?
Absolutey. It’s a center bypass only. Doesn’t affect the valves.

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Old 01-19-2019, 07:58 AM
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Originally Posted by John Belk View Post

Looks great, spoke with Pete on Wends...mine should be here next week. I’ll be installing it when I receive it. Will keep you posted on how it goes...JB
Had their “infinity” design on my .1 RS. It looked and sounded great. Wanted silver for my .2 or brushed. Went with silver ceramic. They can do black, silver or brushed.

If if someone wants my old one PM me. It’s like brand new.
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