Gundo Hack on 997
Thread Starter
Instructor
Joined: Aug 2016
Posts: 104
Likes: 2
From: Toronto
Gundo Hack on 997
hi guys,
been itching to make my 997 sound more agressive.
anyone tried gundo hack? i have listened to a few on youtube but want to listen to the sound in person. i know gundo hack sound different than stock but is it also louder?
anyone want to make me listen to their silencer?
thanks.
been itching to make my 997 sound more agressive.
anyone tried gundo hack? i have listened to a few on youtube but want to listen to the sound in person. i know gundo hack sound different than stock but is it also louder?
anyone want to make me listen to their silencer?
thanks.
Burning Brakes
Joined: Jun 2010
Posts: 1,168
Likes: 82
From: Ontario, Canada 2011 C4S
Drifting
Joined: Mar 2009
Posts: 3,372
Likes: 68
From: West of Mosport!
The 'Gundo' hack is the hack that puts a bent pipe into the unused port on the cans that the PSE option uses with the little flap.
The Fister is LOUD - the Gundo is loud(ish).
I have the Fister. It is OPP... LOUD...:icon107
It also depends on the diameter of the pipe used - mine matches the input/output dia.
If you are on the fence about sound levels - go for the Gundo to replicate the factory option which of course you can't just flick a switch to turn down. But if you do the Fister hack - you are stuck with a sound level that may be too loud for you to live with. There are times when mine is too loud - espy WFO and you are between buildings downtown. The Fister starts up with a 'bark' and idles louder than normal and is loud at anything above 2500 - where as the Gundo comes alive a little louder and takes higher RPM to be really noticeable.
There is even a combo of the two hacks but is not recommended as it kills torque - something to do with the back pressure reduced.
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Drifting
Joined: Mar 2009
Posts: 3,372
Likes: 68
From: West of Mosport!
Exactly.
I don't know the history of the naming of these hacks but somewhere back in an old 996 thread the Gundo was named after the first guy to do this mod and post about it. The Fister came after and was named for the muffler shop in the US to do this hack (he does both). He is still in business today doing mail order although any half decent muffler shop today can do a reasonable job on either hack - its not Saturn V technology.
I don't know the history of the naming of these hacks but somewhere back in an old 996 thread the Gundo was named after the first guy to do this mod and post about it. The Fister came after and was named for the muffler shop in the US to do this hack (he does both). He is still in business today doing mail order although any half decent muffler shop today can do a reasonable job on either hack - its not Saturn V technology.
Pro
Joined: Nov 2010
Posts: 745
Likes: 17
From: North york
the volume of both hacks is dependent on throttle position, so affected by driving style. As far as quiet<loud is all personal preference, although after a while most adjust and want a bit more.
I've had the Fister (pipe to pipe) for years recently added a 200 cell x-pipe and still wouldn't say it is to much for a DD. Ther are many around the GTA with this mod, I'm sure someone would be willing to take you for a spin to sample, I'd be game if you can wait a month or so.
I've had the Fister (pipe to pipe) for years recently added a 200 cell x-pipe and still wouldn't say it is to much for a DD. Ther are many around the GTA with this mod, I'm sure someone would be willing to take you for a spin to sample, I'd be game if you can wait a month or so.
Drifting
Joined: Mar 2009
Posts: 3,372
Likes: 68
From: West of Mosport!
the volume of both hacks is dependent on throttle position, so affected by driving style. As far as quiet<loud is all personal preference, although after a while most adjust and want a bit more.
I've had the Fister (pipe to pipe) for years recently added a 200 cell x-pipe and still wouldn't say it is to much for a DD. Ther are many around the GTA with this mod, I'm sure someone would be willing to take you for a spin to sample, I'd be game if you can wait a month or so.
I've had the Fister (pipe to pipe) for years recently added a 200 cell x-pipe and still wouldn't say it is to much for a DD. Ther are many around the GTA with this mod, I'm sure someone would be willing to take you for a spin to sample, I'd be game if you can wait a month or so.
Racer
Joined: Mar 2016
Posts: 332
Likes: 38
From: San Francisco
What timing as I'm looking into this as well. Fister has a youtube video of their in comparison to stock. Anyone know what size diameter is their bypass? Based on their photo looks like 1.5 or 1.75? I read most go with a 2" bypass
http://fdmotorsports.net/category/fister-exhaust-997/
This is the first I read the Fister is loud but I'm not questioning that. It's easy to see why the PSE would be quieter(as in exhaust is still routed into the muffler). Based on feedback though, the Fister method has been positive for all size bypasses.
http://fdmotorsports.net/category/fister-exhaust-997/
This is the first I read the Fister is loud but I'm not questioning that. It's easy to see why the PSE would be quieter(as in exhaust is still routed into the muffler). Based on feedback though, the Fister method has been positive for all size bypasses.
Pro
Joined: Nov 2010
Posts: 745
Likes: 17
From: North york
Downside to exhaust upgrades is you have to be outside of the vehicle to get the full impact. Close call with the OPP. Our 400 on ramp by the cottage is very long and snakes through the local granite, I was accelerating rather enthusiastically in 3rd, as I round the bend OPP radar right there! though for sure I was busted, with a close eye on the rearview I decelerated to merge with traffic wondering how I got away with that one.
Burning Brakes
Joined: Jun 2010
Posts: 1,168
Likes: 82
From: Ontario, Canada 2011 C4S
I actually believe that is the Hanksville hack , Gundo is a straight inlet outlet hack. The Hanksville was done to mimic the pse which has the valve on this pipe. It is not as loud as the Gundo as it still passes through some internal baffling. Iirc
Here is the original as I can find Gundo post. This was before FD Motorsports started in 2009
http://www.6speedonline.com/forums/997/98396-pse-waste-money.html
Y
Here is the original as I can find Gundo post. This was before FD Motorsports started in 2009
http://www.6speedonline.com/forums/997/98396-pse-waste-money.html
Y
Last edited by docdrs; Jan 9, 2017 at 06:13 PM. Reason: More info