997.1 GT3 buying guide
Discussion
No porting on the 6RS heads (certainly not any I've seen). It still runs the common intake and exhaust manifolds.
It does use the later type spark plug configuration as per the 997 gt3 so is a "transition" head if one could call it such a thing.
As for Porsche press releases. In the words of public enemy...."don't believe the hype"
It does use the later type spark plug configuration as per the 997 gt3 so is a "transition" head if one could call it such a thing.
As for Porsche press releases. In the words of public enemy...."don't believe the hype"
911Thrasher said:
+1 to this!!! love it already...where is it now?
Regarding Akrapovic, they are quite some money!
I just received my Fabspeed center bypass last week from the US, and got it fitted friday afternoon => couldn't stop driving it over the wkend eheheheh! Sounds amazing, plug or unplugged!
Overall was only £850 GBP (shipping, VAT, fitting). Jeff at Fabspeed was super responsive and quick and getting both bypasses built /shipped for Neil Kidhaa and i
Here is mine (sans Akrapovic ,sadly)Regarding Akrapovic, they are quite some money!
I just received my Fabspeed center bypass last week from the US, and got it fitted friday afternoon => couldn't stop driving it over the wkend eheheheh! Sounds amazing, plug or unplugged!
Overall was only £850 GBP (shipping, VAT, fitting). Jeff at Fabspeed was super responsive and quick and getting both bypasses built /shipped for Neil Kidhaa and i
Edited by 911Thrasher on Tuesday 28th February 14:30
fioran0 said:
No porting on the 6RS heads (certainly not any I've seen). It still runs the common intake and exhaust manifolds.
It does use the later type spark plug configuration as per the 997 gt3 so is a "transition" head if one could call it such a thing.
As for Porsche press releases. In the words of public enemy...."don't believe the hype"
How many 996 GT3 RS cylinder heads have you seen? And what were you doing looking inside 6RS cylinder heads? It does use the later type spark plug configuration as per the 997 gt3 so is a "transition" head if one could call it such a thing.
As for Porsche press releases. In the words of public enemy...."don't believe the hype"
3. A pair that were going onto a car then one that was bought to look over incase it looked like something that might be useful as an upgrade path.
The official line is "optimised inlet port geometry". I assume it's to do with angles hence the smaller spark plug rather than what folks jump to ie "porting". That would technically be flow.
Now the 6cup has noticeably bigger ports than the street 6GT3 and the 7cup (which is on the small spark plug) has quite frankly massive ports. The RS heads I saw didn't look any larger than the regular 6GT3 but going by the 997 cup the potential is very much there for a large port increase.
There's no special/unique 6RS map either. DMEs are all the same part number for the mk2 cars which by extension means one common factory map.
The official line is "optimised inlet port geometry". I assume it's to do with angles hence the smaller spark plug rather than what folks jump to ie "porting". That would technically be flow.
Now the 6cup has noticeably bigger ports than the street 6GT3 and the 7cup (which is on the small spark plug) has quite frankly massive ports. The RS heads I saw didn't look any larger than the regular 6GT3 but going by the 997 cup the potential is very much there for a large port increase.
There's no special/unique 6RS map either. DMEs are all the same part number for the mk2 cars which by extension means one common factory map.
Edited by fioran0 on Tuesday 28th February 16:14
3. A pair that were going onto a car and a single one.
The official line is "optimised inlet port geometry". I assume it's to do with angles or spacing hence the smaller spark plug rather than what folks jump to ie "porting".
the 996.2 GT3 and the RS both use the same intake manifolds and gaskets for the heads.
The 6cup has noticeably bigger ports than the street 6GT3 but the 7cup (which is on the small spark plug setup) has much bigger ports than them all. One has to assume that the changes to the head that saw a smaller spark plug being used help this extra size be achieved. The RS heads i saw didnt look noticeably bigger in terms of ports than the regular 6GT3 heads.
There's no special/unique 6RS map either. DMEs are all the same part number for the mk2 cars which by extension means one common factory map
The official line is "optimised inlet port geometry". I assume it's to do with angles or spacing hence the smaller spark plug rather than what folks jump to ie "porting".
the 996.2 GT3 and the RS both use the same intake manifolds and gaskets for the heads.
The 6cup has noticeably bigger ports than the street 6GT3 but the 7cup (which is on the small spark plug setup) has much bigger ports than them all. One has to assume that the changes to the head that saw a smaller spark plug being used help this extra size be achieved. The RS heads i saw didnt look noticeably bigger in terms of ports than the regular 6GT3 heads.
There's no special/unique 6RS map either. DMEs are all the same part number for the mk2 cars which by extension means one common factory map
Edited by fioran0 on Tuesday 28th February 17:09
911Thrasher said:
+1 to this!!! love it already...where is it now?
Regarding Akrapovic, they are quite some money!
I just received my Fabspeed center bypass last week from the US, and got it fitted friday afternoon => couldn't stop driving it over the wkend eheheheh! Sounds amazing, plug or unplugged!
Overall was only £850 GBP (shipping, VAT, fitting). Jeff at Fabspeed was super responsive and quick and getting both bypasses built /shipped for Neil Kidhaa and i
911Thrasher,Regarding Akrapovic, they are quite some money!
I just received my Fabspeed center bypass last week from the US, and got it fitted friday afternoon => couldn't stop driving it over the wkend eheheheh! Sounds amazing, plug or unplugged!
Overall was only £850 GBP (shipping, VAT, fitting). Jeff at Fabspeed was super responsive and quick and getting both bypasses built /shipped for Neil Kidhaa and i
Edited by 911Thrasher on Tuesday 28th February 14:30
Have been looking at these. Did you order yours direct or through your fitter? Would it pass track day noise tests and if not is it a DIY job to change it back for a track day?
GrahamSaunders said:
Did you order yours direct or through your fitter?
Would it pass track day noise tests
is it a DIY job to change it back for a track day?
1. i ordered directly from Jeff@Fabspeed.com - he is super quick at responding emails...Would it pass track day noise tests
is it a DIY job to change it back for a track day?
2. not sure it will pass the Bedford 101dB as my standard RS was just on the limit (even though they have always let me track it there)...but surely the bypass is quiet enough for 105dB days.
Also if you keep it plugged, you can clearly notice the sound level changes with "sport" button on/off. Mine is running unplugged though...full sound 100% time
3. Jeff said it could be a DIY job, no need to remove the bumper...but when we tried ourselves neither Kidhaa or i could undo the original center exhaust: not easy access to the top bolts (only 6bolts to undo in total). I ended up sending my car to the local shop and to do a "clean" job they did remove the rear bumper.
Let's see before next "bedford" day, how they do to refit the original exhaust....or stick to 105dB days
Edited by 911Thrasher on Tuesday 28th February 21:35
fioran0 said:
3. A pair that were going onto a car then one that was bought to look over incase it looked like something that might be useful as an upgrade path.
The official line is "optimised inlet port geometry". I assume it's to do with angles hence the smaller spark plug rather than what folks jump to ie "porting". That would technically be flow.
Now the 6cup has noticeably bigger ports than the street 6GT3 and the 7cup (which is on the small spark plug) has quite frankly massive ports. The RS heads I saw didn't look any larger than the regular 6GT3 but going by the 997 cup the potential is very much there for a large port increase.
There's no special/unique 6RS map either. DMEs are all the same part number for the mk2 cars which by extension means one common factory map.
Hi Neil, common generic ECU I agree on, but as I understood it the factory have different maps for all the car built, you order an ECU and they then supply a file in accordance with your chassis number ?The official line is "optimised inlet port geometry". I assume it's to do with angles hence the smaller spark plug rather than what folks jump to ie "porting". That would technically be flow.
Now the 6cup has noticeably bigger ports than the street 6GT3 and the 7cup (which is on the small spark plug) has quite frankly massive ports. The RS heads I saw didn't look any larger than the regular 6GT3 but going by the 997 cup the potential is very much there for a large port increase.
There's no special/unique 6RS map either. DMEs are all the same part number for the mk2 cars which by extension means one common factory map.
Agree too on the 997 Cup head port sizes, massive sums them up.
henry,
only thing is my parts system doesnt want VIN info for an ECU but does for things like wiring loom etc (ie pieces where its 100% vehicle specific).
for the ECU is just comes up as a common part number which would seem to suggest its just the one for all. though im happy to be corrected thats for sure.
an OPC wanting a VIN isnt necessarily the same as porsche actually wanting the VIN.
only thing is my parts system doesnt want VIN info for an ECU but does for things like wiring loom etc (ie pieces where its 100% vehicle specific).
for the ECU is just comes up as a common part number which would seem to suggest its just the one for all. though im happy to be corrected thats for sure.
an OPC wanting a VIN isnt necessarily the same as porsche actually wanting the VIN.
fioran0 said:
henry,
only thing is my parts system doesnt want VIN info for an ECU but does for things like wiring loom etc (ie pieces where its 100% vehicle specific).
for the ECU is just comes up as a common part number which would seem to suggest its just the one for all. though im happy to be corrected thats for sure.
an OPC wanting a VIN isnt necessarily the same as porsche actually wanting the VIN.
996 turbo appears to have the same DME part number (996 618 601 04) and the boxster.only thing is my parts system doesnt want VIN info for an ECU but does for things like wiring loom etc (ie pieces where its 100% vehicle specific).
for the ECU is just comes up as a common part number which would seem to suggest its just the one for all. though im happy to be corrected thats for sure.
an OPC wanting a VIN isnt necessarily the same as porsche actually wanting the VIN.
ehm......our survey says nope!!!
thats the DME PN for the 1999 and earlier C2, Turbo has two part number options for the DME and neither of them are that one you posted. 996.2GT3 and RS list with a common part number thats a different number again.
im happy to have a discussion here about technical things, its pretty much the only reason i come on and my own view on the 6RS mapping is that i think it would be awesome if it had a unique one.
i like the technical chats and enjoy finding out new things or that ive been mistaken, even when they have nothing to do with the cars i run. its never an exclusive dialogue so theres always opportunity for all. however if you are going to post what appears to be a snidey gotcha rather than a contribution, make sure its accurate maybe huh!!
thats the DME PN for the 1999 and earlier C2, Turbo has two part number options for the DME and neither of them are that one you posted. 996.2GT3 and RS list with a common part number thats a different number again.
im happy to have a discussion here about technical things, its pretty much the only reason i come on and my own view on the 6RS mapping is that i think it would be awesome if it had a unique one.
i like the technical chats and enjoy finding out new things or that ive been mistaken, even when they have nothing to do with the cars i run. its never an exclusive dialogue so theres always opportunity for all. however if you are going to post what appears to be a snidey gotcha rather than a contribution, make sure its accurate maybe huh!!
Edited by fioran0 on Tuesday 28th February 20:35
fioran0 said:
ehm......our survey says nope!!!
thats the DME PN for the 1999 and earlier C2, Turbo has two part number options for the DME and neither of them are that one you posted. 996.2GT3 and RS list with a common part number thats a different number again.
im happy to have a discussion here about technical things, its pretty much the only reason i come on and my own view on the 6RS mapping is that i think it would be awesome if it had a unique one.
i like the technical chats and enjoy finding out new things or that ive been mistaken, even when they have nothing to do with the cars i run. its never an exclusive dialogue so theres always opportunity for all. however if you are going to post what appears to be a snidey gotcha rather than a contribution, make sure its accurate maybe huh!!
Hi Neil,thats the DME PN for the 1999 and earlier C2, Turbo has two part number options for the DME and neither of them are that one you posted. 996.2GT3 and RS list with a common part number thats a different number again.
im happy to have a discussion here about technical things, its pretty much the only reason i come on and my own view on the 6RS mapping is that i think it would be awesome if it had a unique one.
i like the technical chats and enjoy finding out new things or that ive been mistaken, even when they have nothing to do with the cars i run. its never an exclusive dialogue so theres always opportunity for all. however if you are going to post what appears to be a snidey gotcha rather than a contribution, make sure its accurate maybe huh!!
Edited by fioran0 on Tuesday 28th February 20:35
Did you get my text yesterday? As for the ecu mapping there is different maps for the RS. It is listed under programming and the RS file is protected and you get a code which germany gives you a unlock code for the code you provided.
All other maps on the ecu are unlocked.
Mike
911Thrasher said:
GrahamSaunders said:
Did you order yours direct or through your fitter?
Would it pass track day noise tests
is it a DIY job to change it back for a track day?
1. i ordered directly from Jeff@Fabspeed.com - he is super quick at responding emails...and marked it "low value" for customs to lower the entry VATWould it pass track day noise tests
is it a DIY job to change it back for a track day?
2. not sure it will pass the Bedford 101dB as my standard RS was just on the limit (even though they have always let me track it there)...but surely the bypass is quiet enough for 105dB days.
Also if you keep it plugged, you can clearly notice the sound level changes with "sport" button on/off. Mine is running unplugged though...full sound 100% time
3. Jeff said it could be a DIY job, no need to remove the bumper...but when we tried ourselves neither Kidhaa or i could undo the original center exhaust: not easy access to the top bolts (only 6bolts to undo in total). I ended up sending my car to the local shop and to do a "clean" job they did remove the rear bumper.
Let's see before next "bedford" day, how they do to refit the original exhaust....or stick to 105dB days
hey mike,
nope didnt get it, just the one ref pads.
thanks for the mapping info. one for the definite file for sure. thats pretty neat. i wonder what the changes are? ive seen RS commonly make less power on dynos than stock GT3 which added to what henry was saying ref the cats i wonder if it runs richer to make the most of the ram air effect. since most people dont run them at these speeds it would explain the cats and the lower dyno (where theres no ram effect).
maybe steve will chip in with some info here, though this is now pretty buried and way off topic.
nope didnt get it, just the one ref pads.
thanks for the mapping info. one for the definite file for sure. thats pretty neat. i wonder what the changes are? ive seen RS commonly make less power on dynos than stock GT3 which added to what henry was saying ref the cats i wonder if it runs richer to make the most of the ram air effect. since most people dont run them at these speeds it would explain the cats and the lower dyno (where theres no ram effect).
maybe steve will chip in with some info here, though this is now pretty buried and way off topic.
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