718 Gt4 exhaust options
Discussion
Twinfan said:
Who's to say the dyno settings aren't changed between runs though?
I don't trust anyone not to fiddle with them to make things look better than they actually are.
The only way to do this fairly would be to test different exhausts on the same car, same day. If that’s possible.I don't trust anyone not to fiddle with them to make things look better than they actually are.
Twinfan said:
Who's to say the dyno settings aren't changed between runs though?
I don't trust anyone not to fiddle with them to make things look better than they actually are.
All the various rear section systems, appear to be in the same ball park as one another. At the end of the day, I don’t think changing the rear section is about power. It’s just about sound and a bit of weight saving. Any power gain is a side effect.I don't trust anyone not to fiddle with them to make things look better than they actually are.
My personal view would be accept that the Flat 6 in 718 Cayman/Boxster will not sound like previous gen flat six, because the exits are separated, it’s a new sound; and then to just do the electronic valves control, to keep the valves permanently open on my command rather than opening and closing through the rev range automatically, which is the main part of the problem IMO.
To get close to previous gen scream or cup car sound, you’ll need race headers, OPFs delete and rear pipe section that properly merges harmonics from both banks.
Edited by TDT on Thursday 29th October 21:45
MannyLon said:
Twinfan said:
Who's to say the dyno settings aren't changed between runs though?
I don't trust anyone not to fiddle with them to make things look better than they actually are.
The only way to do this fairly would be to test different exhausts on the same car, same day. If that’s possible.I don't trust anyone not to fiddle with them to make things look better than they actually are.
oo7ml said:
This seems and sounds like the best sounding exhaust out there, in terms of just changing the rear box.
A well put together video too, which clearly outlines the difference in sound in comparison to the stock exhaust.
£1950 seems like a reasonable price too.
https://youtu.be/i3J8ifbR1wA
I'd be amazed if it didn't drone at motorway speeds. Added to which £2k for a few bits of pipe and a couple of tailpipe trims might seem "reasonable" to you, but I'd call it something very different.A well put together video too, which clearly outlines the difference in sound in comparison to the stock exhaust.
£1950 seems like a reasonable price too.
https://youtu.be/i3J8ifbR1wA
The SuperSprint system linked to is what I'd term "reasonable" money for a brand with an excellent reputation.
Slippydiff said:
oo7ml said:
This seems and sounds like the best sounding exhaust out there, in terms of just changing the rear box.
A well put together video too, which clearly outlines the difference in sound in comparison to the stock exhaust.
£1950 seems like a reasonable price too.
https://youtu.be/i3J8ifbR1wA
I'd be amazed if it didn't drone at motorway speeds. Added to which £2k for a few bits of pipe and a couple of tailpipe trims might seem "reasonable" to you, but I'd call it something very different.A well put together video too, which clearly outlines the difference in sound in comparison to the stock exhaust.
£1950 seems like a reasonable price too.
https://youtu.be/i3J8ifbR1wA
The SuperSprint system linked to is what I'd term "reasonable" money for a brand with an excellent reputation.
I think the SuperSprint sounds too much like the stock sound?
oo7ml said:
Is the SuperSprint not the same price???
I think the SuperSprint sounds too much like the stock sound?
They are indeed roughly the same price.I think the SuperSprint sounds too much like the stock sound?
But look what you’re getting for your money :
The Fabspeed item is described as a “Lightweight Competition Exhaust”, in reality it’s a silencer delete kit, or as I said previously, a couple of bits of tube and a couple of tailpipe trims.
The SuperSprint system is a high quality replacement silencer, with valves to enable you to alter the sound/loudness.
Either one company is charging a lot for a couple of pieces of tube and two tailpipes and referring to it as a “lightweight competition exhaust”, or the other company (with an excellent reputation) is undercharging for a high quality switchable system that actually features a replacement silencer.
I’ll leave you to work out which is “reasonable” value for money
SuperSprint's not that great though, a peg down from Cargraphic imo.
most if not all systems are a rip off.
there is a guy who makes Lotus stuff has a good rep and a back box is £1250 + vat.
manifolds and cats for £2300 !!!
Porkers systems can be £15k, so we are all paying Porsche TAX.
most if not all systems are a rip off.
there is a guy who makes Lotus stuff has a good rep and a back box is £1250 + vat.
manifolds and cats for £2300 !!!
Porkers systems can be £15k, so we are all paying Porsche TAX.
Edited by Porsche911R on Friday 30th October 09:28
I currently have an Akrapovic Evolution system on my M4 and it's been worth every penny in terms of sound, performance gain, less weight and looks.
I've noticed they do exhaust options for the 718 GT4/Spyder:
https://www.akrapovic.com/en/car/products/Porsche/...
Has anyone on here have one? What are people's thoughts on the Akrapovic system?
It's something I would definitely consider once the warranty is up.
I've noticed they do exhaust options for the 718 GT4/Spyder:
https://www.akrapovic.com/en/car/products/Porsche/...
Has anyone on here have one? What are people's thoughts on the Akrapovic system?
It's something I would definitely consider once the warranty is up.
ScottyM4CP said:
I currently have an Akrapovic Evolution system on my M4 and it's been worth every penny in terms of sound, performance gain, less weight and looks.
I've noticed they do exhaust options for the 718 GT4/Spyder:
https://www.akrapovic.com/en/car/products/Porsche/...
Has anyone on here have one? What are people's thoughts on the Akrapovic system?
It's something I would definitely consider once the warranty is up.
VERY expensive as always. but you can sell them on 2nd hand as a know name.I've noticed they do exhaust options for the 718 GT4/Spyder:
https://www.akrapovic.com/en/car/products/Porsche/...
Has anyone on here have one? What are people's thoughts on the Akrapovic system?
It's something I would definitely consider once the warranty is up.
Porsche911R said:
SuperSprint's not that great though, a peg down from Cargraphic imo.
most if not all systems are a rip off.
there is a guy who makes Lotus stuff has a good rep and a back box is £1250 + vat.
manifolds and cats for £2300 !!!
Porkers systems can be £15k, so we are all paying Porsche TAX.
As ever, it's subjective, but IMO Supersprint stuff is every bit as good as the stuff Phoenix produce in Devon.most if not all systems are a rip off.
there is a guy who makes Lotus stuff has a good rep and a back box is £1250 + vat.
manifolds and cats for £2300 !!!
Porkers systems can be £15k, so we are all paying Porsche TAX.
SuperSprint's M5/6 V10 manifolds :
Couldn't agree more on the Porsche "tax", JCM's Ti GT3/RS tailpipe assembly and Fabspeed's GT4 "Lightweight Competition System" being two perfect examples of items that have very little in the way of material content, a morning or afternoon making a jig and neither have anything close to the labour content required to make a decent set of manifolds ...
Porsche911R said:
SuperSprint's not that great though, a peg down from Cargraphic imo.
most if not all systems are a rip off.
there is a guy who makes Lotus stuff has a good rep and a back box is £1250 + vat.
manifolds and cats for £2300 !!!
Porkers systems can be £15k, so we are all paying Porsche TAX.
Supersprint are top notch. Watch and learn Mr R most if not all systems are a rip off.
there is a guy who makes Lotus stuff has a good rep and a back box is £1250 + vat.
manifolds and cats for £2300 !!!
Porkers systems can be £15k, so we are all paying Porsche TAX.
Edited by Porsche911R on Friday 30th October 09:28
https://www.youtube.com/watch?v=WWh5rT_zdG4
Rojibo said:
Perhaps I'm blind but can't see a price on the site, if you have to ask?...
Slip-on (back box) is £5438 and link pipe is £1636.https://clptuning.co.uk/?make=2191&model=2604&...
ScottyM4CP said:
Slip-on (back box) is £5438 and link pipe is £1636.
https://clptuning.co.uk/?make=2191&model=2604&...
https://clptuning.co.uk/?make=2191&model=2604&...
MannyLon said:
Excellent video that, thankyou It does bear out what I said about Supersprint being every bit as good as Cargraphic (and if I'm honest, probably better) though Cargraphic have carved out a fantastic niche in Porsche circles. And with good reason, their products are excellent quality and do what they say on the tin. That they're fabricated in the UK by Phoenix Performance Exhausts, is a nice and somewhat ironic bonus.Supersprint's manufacturing facility however is in a different league, but it would be, they've been fabricating exhausts for 65 years. Their MAHA dyno cell tells you how professional and committed they are.
Both are professional no-BS exhaust manufacturing companies, which is more than can be said for a certain other manufacturer mentioned in this thread ...
Greetings from across the pond in the midwestern US. My first post, incoming spyder (6th P car). Wandered over this way to see how you chaps are coming along with the exhaust situation and this seems like a very informative thread. I must admit I'm a bit sympathetic for the strict sound/emissions regulations as this would drive me nuts.
Back on track. Rear exhaust options. There are so many that its hard to choose. The way Im thinking about it is this and I see it as 2 categories: street and race (although with all the upstream cats/filters you guys can run a race exhaust and still be quasi civilized). The street versions are valved and have a baffled can/muffler and the race versions rely on bottle style resonators and exhaust collisions to cancel drone (which kind of works but not if you're sensitive).
Re: power gains. I wouldnt put too much stock in dynos because unless you know EXACTLY how the car was dyno'ed and see uncorrected back to back plots with IAT/fueling etc, 10-15 hp is within the error of the test and can be manipulated by fan placement and all sorts of other tricks. Yes most of these rear boxes will net some gains, but nowhere near what you will get with manifolds/opf delete, which in turn, can raise the noise and resonance level exponentially. Rear box in my opinion is entirely about sound, which is critically important for this acoustically neutered GT4.
Two things to consider: 1) the manifolds and opf are profoundly restrictive (800 cell cats I believe in the stamped manifolds and the opf matrix is huge) so decreasing backpressure downstream of that is not really gonna make a noticeable difference unless you run a mufflerless system like JCR, BC Fabs, or Fabspeed etc. And in the drivers seat this is debatable. 2) Valve operation on the GT4 SUCKS. Its REALLY good at eliminating drone using a muffler but it kills the sound up until around 4k rpm. These cars live alot more under 4k than a GT3 because of the slightly longer gearing and lower hp which makes it harder to run through revs. So my advice is, if you want the car to sound nasty but are keeping OPF and stock headers/cats, do a valved race style exhaust.
One comment on fabspeed. I have had two of their systems and was not crazy about the build quality and it rusted very easily to the point where lots of the hardware seized. It also droned like a mofo. I dont see any anti resonance design in their race system except the long H pipe.
Hope this helps
Cheers, Pete
Back on track. Rear exhaust options. There are so many that its hard to choose. The way Im thinking about it is this and I see it as 2 categories: street and race (although with all the upstream cats/filters you guys can run a race exhaust and still be quasi civilized). The street versions are valved and have a baffled can/muffler and the race versions rely on bottle style resonators and exhaust collisions to cancel drone (which kind of works but not if you're sensitive).
Re: power gains. I wouldnt put too much stock in dynos because unless you know EXACTLY how the car was dyno'ed and see uncorrected back to back plots with IAT/fueling etc, 10-15 hp is within the error of the test and can be manipulated by fan placement and all sorts of other tricks. Yes most of these rear boxes will net some gains, but nowhere near what you will get with manifolds/opf delete, which in turn, can raise the noise and resonance level exponentially. Rear box in my opinion is entirely about sound, which is critically important for this acoustically neutered GT4.
Two things to consider: 1) the manifolds and opf are profoundly restrictive (800 cell cats I believe in the stamped manifolds and the opf matrix is huge) so decreasing backpressure downstream of that is not really gonna make a noticeable difference unless you run a mufflerless system like JCR, BC Fabs, or Fabspeed etc. And in the drivers seat this is debatable. 2) Valve operation on the GT4 SUCKS. Its REALLY good at eliminating drone using a muffler but it kills the sound up until around 4k rpm. These cars live alot more under 4k than a GT3 because of the slightly longer gearing and lower hp which makes it harder to run through revs. So my advice is, if you want the car to sound nasty but are keeping OPF and stock headers/cats, do a valved race style exhaust.
One comment on fabspeed. I have had two of their systems and was not crazy about the build quality and it rusted very easily to the point where lots of the hardware seized. It also droned like a mofo. I dont see any anti resonance design in their race system except the long H pipe.
Hope this helps
Cheers, Pete
Edited by Plifechannel on Friday 30th October 16:23
MannyLon said:
Not in Porsche circle's , always been a bit BMW.
Friend had to buy one for his 318is did not fit very well.
So fill your boots if you want a Supersprint.
I,ll stick to Cargraphic.
I doubt any one here has got a supersprint on their porker, buy one and report back :-)
Porsche911R said:
Not in Porsche circle's
, always been a bit BMW.
Friend had to buy one for his 318is did not fit very well.
So fill your boots if you want a Supersprint.
I,ll stick to Cargraphic.
I doubt any one here has got a supersprint on their porker, buy one and report back :-)
Yes mr R will do. You fellow the herd and I’ll catch ya later , always been a bit BMW.
Friend had to buy one for his 318is did not fit very well.
So fill your boots if you want a Supersprint.
I,ll stick to Cargraphic.
I doubt any one here has got a supersprint on their porker, buy one and report back :-)
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