Best Exhaust for a 991.2 GT3
01-05-2019, 10:19 AM
#856
For what it’s worth, I have not noticed any drone up to 5,000 rpm with the Akrapovic full race exhaust installed on my .2 GT3. Maybe I’m just not that sensitive. Or maybe the sheer volume (which there is a lot of) drowns out the drone? Not sure that even makes sense.
01-05-2019, 10:29 AM
#857
Somewhat agree ... but how do we get sound out of the car from 1500 -4500 rpms until the valves open is the question .... disconnecting valves OEM Center is bad drone ... how bad is drone w a Sharkwerks and valves disconnected to give linear sound all through the rev range ? Any help would be appreciated thanks
01-05-2019, 10:51 AM
#858
Burning Brakes
Somewhat agree ... but how do we get sound out of the car from 1500 -4500 rpms until the valves open is the question .... disconnecting valves OEM Center is bad drone ... how bad is drone w a Sharkwerks and valves disconnected to give linear sound all through the rev range ? Any help would be appreciated thanks
01-05-2019, 11:03 AM
#859
Race Director
I just installed yesterday Soul Side By Pass Pipes.....it was raining and car is detailed so I haven’t driven it yet...just started in the garage to check for any leaks rattles.
The Soul pipes went on perfectly...very well designed and built. Soul,is very active here and John at Soul has been great so I bought Soul. Getting ready to go for a drive today.
in the coming days I’m going to take a video with a better microphone than the iPhone videos out there.
The Soul pipes went on perfectly...very well designed and built. Soul,is very active here and John at Soul has been great so I bought Soul. Getting ready to go for a drive today.
in the coming days I’m going to take a video with a better microphone than the iPhone videos out there.
01-05-2019, 11:14 AM
#860
I just installed yesterday Soul Side By Pass Pipes.....it was raining and car is detailed so I haven’t driven it yet...just started in the garage to check for any leaks rattles.
The Soul pipes went on perfectly...very well designed and built. Soul,is very active here and John at Soul has been great so I bought Soul. Getting ready to go for a drive today.
in the coming days I’m going to take a video with a better microphone than the iPhone videos out there.
The Soul pipes went on perfectly...very well designed and built. Soul,is very active here and John at Soul has been great so I bought Soul. Getting ready to go for a drive today.
in the coming days I’m going to take a video with a better microphone than the iPhone videos out there.
Thank you ... Soul seems solid option and fair pricing ... what made you chose a side delete over a center option? Much appreciated
01-05-2019, 11:55 AM
#861
Great to see JCR products and positive feedback ... considering valved side bypasses ... what major difference would rationalize double cost difference between Soul Performance product and JCR as the bypasses are already very light so the titanium while nice and slightly better should not be the whole story ... can someone explain why approx $1500 more in price? Do most valved side bypasses sound the same? Does transition from open closed open as pronounced as a center bypass? Can the extra 25 lbs weight savings vs Center bypass be felt with street use? Appreciate any advice or feedback tks
01-05-2019, 12:01 PM
#862
Race Director
Somewhat agree ... but how do we get sound out of the car from 1500 -4500 rpms until the valves open is the question .... disconnecting valves OEM Center is bad drone ... how bad is drone w a Sharkwerks and valves disconnected to give linear sound all through the rev range ? Any help would be appreciated thanks
01-05-2019, 12:18 PM
#863
Thank you, yes understand their costs that need to be passed along for quality but can someone tell me the $1500 difference in significant benefits to end users? Do they function and sound the same or is their a significant difference behind the wheel on the road ... appreciate the comments tks
01-05-2019, 01:37 PM
#864
Race Car
Join Date: Jan 2013
Location: The way to hell is paved by good intentions “Wenn ich Purist höre...entsichere ich meinen Browning” "Myths are fuel for marketing (and nowadays for flippers too,,,)" time to time is not sufficient to be a saint, you must be also an Hero
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Somewhat agree ... but how do we get sound out of the car from 1500 -4500 rpms until the valves open is the question .... disconnecting valves OEM Center is bad drone ... how bad is drone w a Sharkwerks and valves disconnected to give linear sound all through the rev range ? Any help would be appreciated thanks
in both cases you get rid of 2 silencers( the side or the central ones)
in terms of weight and heat saving is much better the side delete, combined with a Li battery it s a 2k cost shaving 65lbs, not bad, another 40 lbs from PCCBs for 10k
and so on LWBS for 5k etc.
at the end along audio and AC delete is the cheapest way to control the weight and get a better sound (when valves are closed you will have the 2 remaing silencers instead of 4 in the factory setup)
01-05-2019, 01:49 PM
#865
Thank you, yes understand their costs that need to be passed along for quality but can someone tell me the $1500 difference in significant benefits to end users? Do they function and sound the same or is their a significant difference behind the wheel on the road ... appreciate the comments tks
01-05-2019, 09:27 PM
#866
Race Director
Finally got to drive a little tonight....after a lengthy oil change fiasco....I am extremely happy with my Soul Side Muffler Delete mod. 1st my rear tire temps are running 2psi lower...cooler....with out the heavy side mufflers.
There is ZERO drone at any rpm.....sounds awesome above 5k rpm and when your winding it out....GT3 Cup car like but not annoying loud in the car...just a great sound. Putting through the neighborhood or around town u dear 3500rpm and it’s near stock sound
i will work on getting a good video with a good microphone soon...need to enlist the wife’s help with recording but she doesn’t like to do this type of stuff so it gonna cost me dearly.
There is ZERO drone at any rpm.....sounds awesome above 5k rpm and when your winding it out....GT3 Cup car like but not annoying loud in the car...just a great sound. Putting through the neighborhood or around town u dear 3500rpm and it’s near stock sound
i will work on getting a good video with a good microphone soon...need to enlist the wife’s help with recording but she doesn’t like to do this type of stuff so it gonna cost me dearly.
01-05-2019, 09:33 PM
#867
Race Director
Also the transition from valves closed to when they they open around 3800rpm is smoother...the car just sound better to me with side muffler delete over center muffler delete and seeing how Porsche does the Cup cars I believe that if they didn’t have the euro noise laws the cars would come with just header-cats and a center muffler.
01-05-2019, 09:35 PM
#868
Drifting
Do most people go with valved side delete or non-valved? Is there even a point to valved side-delete?
01-06-2019, 02:48 AM
#870
Race Car
Join Date: Jan 2013
Location: The way to hell is paved by good intentions “Wenn ich Purist höre...entsichere ich meinen Browning” "Myths are fuel for marketing (and nowadays for flippers too,,,)" time to time is not sufficient to be a saint, you must be also an Hero
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given on factory setup there are 4 silencers , 2 central and 1 left 1 right (side) working all together only below 4krpms and none of the 4 above 4k rpm
given on factory setup the valves open over 4rpms providing a straight pipe from the cats to the tail pipes excluding the 4 silencers
-Cup cars don t have valves
-Even the stock factory setup over 4krpm when valves are open we can say do not (despite few gasses passing by) use the 4 silencers
difference from stock to side valved delete is heat plus weight benefits and an improved sound below 4krpms where stock is boring
center delete do not save so much weight nor the tires heat and below 4k rpm is quieter because side silencers are more restrictive than center ones
indeed in any setup there s a sound change even above 4k rpm due different tubing and layout in any setup any brand , this is about personal preferences and all in all the factory setup above 4krpms sounds already glorious
pay attention and ask your brand the cabin decibels at different rpms, cup/rsr cars drivers use earplugs for a reason not because they feel cold
unless you are ( already ) deaf the not valved side delete does not make sense due 2/3k rpm drones (more in a single pipe layout)
given on factory setup the valves open over 4rpms providing a straight pipe from the cats to the tail pipes excluding the 4 silencers
-Cup cars don t have valves
-Even the stock factory setup over 4krpm when valves are open we can say do not (despite few gasses passing by) use the 4 silencers
difference from stock to side valved delete is heat plus weight benefits and an improved sound below 4krpms where stock is boring
center delete do not save so much weight nor the tires heat and below 4k rpm is quieter because side silencers are more restrictive than center ones
indeed in any setup there s a sound change even above 4k rpm due different tubing and layout in any setup any brand , this is about personal preferences and all in all the factory setup above 4krpms sounds already glorious
pay attention and ask your brand the cabin decibels at different rpms, cup/rsr cars drivers use earplugs for a reason not because they feel cold
unless you are ( already
) deaf the not valved side delete does not make sense due 2/3k rpm drones (more in a single pipe layout)
Last edited by fxz; 01-06-2019 at 03:39 AM.