997 GT3 RS 3.8 known problems, issues? (Any owners, experts)
Discussion
Digga said:
STOP IT!
Happy as I am with my 7.1 GT3, I've been mulling a 7.2 RS...
Did your mate ever put the Guards diff ramps and plates in? I had mine done early last year and it really did make a huge difference. As a very average, hamfisted amateur track driver, I was not convinced I'd be able to perceive the difference, but it really did transform the car for the better.
I don't think they changed anything on the diff.Happy as I am with my 7.1 GT3, I've been mulling a 7.2 RS...
Did your mate ever put the Guards diff ramps and plates in? I had mine done early last year and it really did make a huge difference. As a very average, hamfisted amateur track driver, I was not convinced I'd be able to perceive the difference, but it really did transform the car for the better.
TDT said:
Can you describe how exactly it feels better?... cheers.
Sounds daft, but under hard acceleration, coming out of a corner, (the tighter the corner, the more you feel it) you can literally feel it lock up and give a much more positive, predictable shove.Apparently, there's supposedly also benefits under hard braking, but I have to say I've never really felt much deficiency in the old setup, or any benefit since fitting new, but perhaps back-to-back I might tell. Perhaps it's more subtle. Or I'm just never braking hard enough!
Digga said:
TDT said:
Can you describe how exactly it feels better?... cheers.
Sounds daft, but under hard acceleration, coming out of a corner, (the tighter the corner, the more you feel it) you can literally feel it lock up and give a much more positive, predictable shove.Apparently, there's supposedly also benefits under hard braking, but I have to say I've never really felt much deficiency in the old setup, or any benefit since fitting new, but perhaps back-to-back I might tell. Perhaps it's more subtle. Or I'm just never braking hard enough!
Also lift off mid corner,with a good set up and diff can tuck the nose nicely back in if you require it.
Yellow491 said:
Digga said:
TDT said:
Can you describe how exactly it feels better?... cheers.
Sounds daft, but under hard acceleration, coming out of a corner, (the tighter the corner, the more you feel it) you can literally feel it lock up and give a much more positive, predictable shove.Apparently, there's supposedly also benefits under hard braking, but I have to say I've never really felt much deficiency in the old setup, or any benefit since fitting new, but perhaps back-to-back I might tell. Perhaps it's more subtle. Or I'm just never braking hard enough!
Also lift off mid corner,with a good set up and diff can tuck the nose nicely back in if you require it.
Digga said:
ounds daft, but under hard acceleration, coming out of a corner, (the tighter the corner, the more you feel it) you can literally feel it lock up and give a much more positive, predictable shove.
Apparently, there's supposedly also benefits under hard braking, but I have to say I've never really felt much deficiency in the old setup, or any benefit since fitting new, but perhaps back-to-back I might tell. Perhaps it's more subtle. Or I'm just never braking hard enough!
I can't speak for the 997 but in the 996, if the car squirms like a frenzied eel into a high speed braking zone, it's a good sign to upgrade the original chocolate diff to Guards or similar.Apparently, there's supposedly also benefits under hard braking, but I have to say I've never really felt much deficiency in the old setup, or any benefit since fitting new, but perhaps back-to-back I might tell. Perhaps it's more subtle. Or I'm just never braking hard enough!
Porsche911R said:
pretty bomb proof, just keep an eye on the centre locks, bought at the top of this bubble though so investment choice seems odd as cars just have not been selling, in fact OPC cars have been dropping as have JZM prices.
Buying to drive though one of Porsche best cars, enjoy ;-)
Are you sure about that.Buying to drive though one of Porsche best cars, enjoy ;-)
See the ex Chris Harris 4.0L 997 has sold..
Harris_I said:
I can't speak for the 997 but in the 996, if the car squirms like a frenzied eel into a high speed braking zone, it's a good sign to upgrade the original chocolate diff to Guards or similar.
997.1 GT3 does this. 
Not sure whether the rear brakes chime in to help moderate it.
braddo said:
997.1 GT3 does this.
Not sure whether the rear brakes chime in to help moderate it.
They do and this is a problem. The 996 did not. It had 'proper' diff plate angles, but the 997 had weaker angles and the engineer's idea was to use the fancy tech in the ABS to augment the diff lockup. Not only does it not work as nicely - lacks 'feel' - it also burns out the brake pads.Not sure whether the rear brakes chime in to help moderate it.
People tracking these cars were unwittingly getting higher rear than front brake temperatures. Normally, fronts take the brunt of the work and get hottest, but people were knackering rear pads and sometimes even discs.
Great thread here: https://www.pistonheads.com/gassing/topic.asp?h=0&...
This might be a slight odd problem but in hotter climates the inside seal of the back window can perish. The window still seals , so no leaks, but when you shut the door you can see the window jump up with the air pressure. Just needs taking out and putting back in again and then you might as well fit a new window as they get a bit scratched up over time.
Maybe not a UK problem but good to check on those HK and Singapore cars that make it back to the UK RHD market after a few years.
Maybe not a UK problem but good to check on those HK and Singapore cars that make it back to the UK RHD market after a few years.
BeanoRS said:
This might be a slight odd problem but in hotter climates the inside seal of the back window can perish. The window still seals , so no leaks, but when you shut the door you can see the window jump up with the air pressure. Just needs taking out and putting back in again and then you might as well fit a new window as they get a bit scratched up over time.
Maybe not a UK problem but good to check on those HK and Singapore cars that make it back to the UK RHD market after a few years.
Perhaps the plastic screen has a different thermal expansion rate to glass?Maybe not a UK problem but good to check on those HK and Singapore cars that make it back to the UK RHD market after a few years.
BeanoRS said:
This might be a slight odd problem but in hotter climates the inside seal of the back window can perish. The window still seals , so no leaks, but when you shut the door you can see the window jump up with the air pressure. Just needs taking out and putting back in again and then you might as well fit a new window as they get a bit scratched up over time.
Maybe not a UK problem but good to check on those HK and Singapore cars that make it back to the UK RHD market after a few years.
From what I know it’s been cars going the other way for the last few years ! £ on it’s arse...Maybe not a UK problem but good to check on those HK and Singapore cars that make it back to the UK RHD market after a few years.
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