Sports Exhaust
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Guest
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Neill
Hayward & Scott do a nice, complete stainless system. A bit dear, maybe, but they can tailor the sound.
Just because I have one fitted does not make me biased !
Actually, mine is the quietist (sic) that they could produce, but still makes a nice,
deep-throated sound.
Performance - +10/15 bhp normally aspirated, +15/25 forced induction (they say).
Hayward & Scott do a nice, complete stainless system. A bit dear, maybe, but they can tailor the sound.
Just because I have one fitted does not make me biased !
Actually, mine is the quietist (sic) that they could produce, but still makes a nice,
deep-throated sound.
Performance - +10/15 bhp normally aspirated, +15/25 forced induction (they say).
Guest
New member
Getting off the subject a bit. sorry!
Checked out the link to pelican parts and I thought I would have a look round, and found this
http://forums.pelicanparts.com/showthread.php?s=3c48cd516fdace0a2ac3a3115d4141d0&threadid=113308
Please tell me that they are having a laugh. You would never get that in the luggage compartment.
Checked out the link to pelican parts and I thought I would have a look round, and found this
http://forums.pelicanparts.com/showthread.php?s=3c48cd516fdace0a2ac3a3115d4141d0&threadid=113308
Please tell me that they are having a laugh. You would never get that in the luggage compartment.
Neill
Are you going for a whole system??
I just have the back box on mine and it cost £675 + VAT - I think it was so expensive because it was a one off ie. going from 993 heat exchangers and needed to be small enough to fit in a SC body.
Bl00dy marvellous sound though - the whole street turns around from 50 yards away when I rumble down the road.
Are you going for a whole system??
I just have the back box on mine and it cost £675 + VAT - I think it was so expensive because it was a one off ie. going from 993 heat exchangers and needed to be small enough to fit in a SC body.
Bl00dy marvellous sound though - the whole street turns around from 50 yards away when I rumble down the road.
Guest
New member
Hi Richard, Not sure about the whole system as I seem to recall someone saying that replacing the heat exchangers greatly reduces the in car heater output. I realise I may get slated for worrying about such trivial things but without a heater the wife go near the car[8D] If Simon from essential is around maybe he can help! He is quoting around £325 for a rear box
ClubSport 911
New member
this says it all :-
There is strong and substantive evidence that the reduced back pressure of a free flow exhaust impairs scavenging efficiency of the 3.2 @ lower revs. This reduces cylinder filling, hence torque. However, @ high revs, it might well be improved, and it is this step (transition point) that the car " feels" faster...a bit like a 2 stroke when it is " on the cam" .
Don;t forget the only way you get to those nice " high revs" is via those low torque low revs....
I heard (very recently) that a very very well known Porsche specialist tested half a dozen sports exhausts in the UK and they all lost torque. Indeed one of the Club Sport owners I know, had his car " improved" in the same way and commented that it felt much peakier / faster, etc, but on the rolling road had lost 20bhp... needless to say he took off his improved (but nice sounding) exhaust in favour of an engine re-map and gained +7bhp...
(making 248now)
However, if it sounds good, looks good, then who the hell am I ! - Game on - look forward to hearing how you get on with it, and good luck
Rgds
PS - the SC is an althogether different matter - they always gain with SSI ' s / equal length primaries etc...
There is strong and substantive evidence that the reduced back pressure of a free flow exhaust impairs scavenging efficiency of the 3.2 @ lower revs. This reduces cylinder filling, hence torque. However, @ high revs, it might well be improved, and it is this step (transition point) that the car " feels" faster...a bit like a 2 stroke when it is " on the cam" .
Don;t forget the only way you get to those nice " high revs" is via those low torque low revs....
I heard (very recently) that a very very well known Porsche specialist tested half a dozen sports exhausts in the UK and they all lost torque. Indeed one of the Club Sport owners I know, had his car " improved" in the same way and commented that it felt much peakier / faster, etc, but on the rolling road had lost 20bhp... needless to say he took off his improved (but nice sounding) exhaust in favour of an engine re-map and gained +7bhp...
(making 248now)
However, if it sounds good, looks good, then who the hell am I ! - Game on - look forward to hearing how you get on with it, and good luck
Rgds
PS - the SC is an althogether different matter - they always gain with SSI ' s / equal length primaries etc...
Guest
New member
Seconding Steve' s comments. I spoke to Jack at Autofarm about this and he confirmed that they had tested SSIs on a 3.2 with various mufflers and could not find any improvement.
It is very hard to get real hp increases from a 3.2. I would recommend you stick with the standard exhaust arrangement especially if your heat exchangers do not *need* replacing. You can fit a nice shiney pre muffler (go for standard pattern as the straight bypass pipes reduce power) and a nice shiney stainless backbox with one or two big fat stainless pipes. This will look good and sound good and will weigh a useful 20lbs or so less - which is better than nothing - but don' t get your hopes up for real hp increases. You will also walk away with your wallet lighter by only 4-500 quid.
When you say you have an induction kit, what do you mean? Just a cone filter kit or a hot film mass airflow kit? Sorry if this disappoints you, but a filter will almost certainly do nothing but make a nice noise (which in my book is reason enough to spend a little cash) and mass air flow will do little without other mods. It is reckoned to be 6-7 hp by itself and is often referred to as the icing on the cake after you have done 3.4 litre Ps&Cs, cams, ported + polished heads etc. Again, makes a great noise though.
Do you have before and after dyno charts by any chance?
Curious to know more. If you have some cash to throw around I will make some suggestions as to how to make real horsepower...
Richard
It is very hard to get real hp increases from a 3.2. I would recommend you stick with the standard exhaust arrangement especially if your heat exchangers do not *need* replacing. You can fit a nice shiney pre muffler (go for standard pattern as the straight bypass pipes reduce power) and a nice shiney stainless backbox with one or two big fat stainless pipes. This will look good and sound good and will weigh a useful 20lbs or so less - which is better than nothing - but don' t get your hopes up for real hp increases. You will also walk away with your wallet lighter by only 4-500 quid.
When you say you have an induction kit, what do you mean? Just a cone filter kit or a hot film mass airflow kit? Sorry if this disappoints you, but a filter will almost certainly do nothing but make a nice noise (which in my book is reason enough to spend a little cash) and mass air flow will do little without other mods. It is reckoned to be 6-7 hp by itself and is often referred to as the icing on the cake after you have done 3.4 litre Ps&Cs, cams, ported + polished heads etc. Again, makes a great noise though.
Do you have before and after dyno charts by any chance?
Curious to know more. If you have some cash to throw around I will make some suggestions as to how to make real horsepower...
Richard
Guest
New member
Hi Richard, The induction kit is indeed the cone type and I think what I am looking for is probably sound more than BHP gains (if I wanted to go faster I guess I could have bought a Turbo) I like the way the car performes as it is and am really looking for a better sound. But which re box to go for is the question? I see Simon has Dansk rear S/S boxes for £275.00. Your thoughts?
Guest
New member
No personal experience with the Dansk, but the Pelican and Rennlist guys in the US like them a lot. They seem to be the most popular choice as a replacement rear box.
My recollection is that people say that the single outlet 84mm makes a nicer deeper sound at idle and a more Ferrari-esque sound at high revs (as all stainless systems tend to sound) but not too loud at cruising rpms and without and droning or nasty reverb. Dual outlet is louder.
A search on Pelican will yield many threads on Dansk rear mufflers.
Richard
My recollection is that people say that the single outlet 84mm makes a nicer deeper sound at idle and a more Ferrari-esque sound at high revs (as all stainless systems tend to sound) but not too loud at cruising rpms and without and droning or nasty reverb. Dual outlet is louder.
A search on Pelican will yield many threads on Dansk rear mufflers.
Richard
ClubSport 911
New member
Neill... not sure why the [
] comment crept in, but anyhow, I run a standard exhaust on my car.. as richard mentioned, Sounds and looks might be important, but I' d only ever fit OE boxes despite the " Max Power" attraction that lurks inside me for a rorty noise and outlet pipe like a bazooka....
I would go SS via Dansk, but would not go free flow unless I changed inlet to carbs or the cams.
Rgds
Steve
] comment crept in, but anyhow, I run a standard exhaust on my car.. as richard mentioned, Sounds and looks might be important, but I' d only ever fit OE boxes despite the " Max Power" attraction that lurks inside me for a rorty noise and outlet pipe like a bazooka....I would go SS via Dansk, but would not go free flow unless I changed inlet to carbs or the cams.
Rgds
Steve
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