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- Thread starter timbo
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ORIGINAL: nathan 1981 930 G50
I've never driven 4WD but I have to say that the current 997tt looks like it handles pretty well. I've seen some videos on youtube and don't think you can compare it to any other 4WD car, except maybe a WRC car [].
I would like to talk to someone who really knows about Impreza's or Evo's and get the nitty gritty on the road cars diff's compared to the WRC cars. I note the WRC cars cost £500K to build so I doubt the diff's are the same.
As far as I'm aware, a lot of the functions of active diffs have been banned from WRC.
The EVO's AYC diff was very similar to the WRC diff and operated almost as fast (you could also get a more agressive chip, but wear was increased), the WRC diffs were much stronger though. The AYC works by having two holow shafts running over the left hand output shaft in the diff. One running at +15% speed and one at -15% speed. A hydraulic clutch pack then progressively locked up the output shaft to the faster or slower shaft. Net result the computer could control the speed of one wheel in relation to the other (and also perform the function of an LSD).
This meant the EVO's up to 6 (maybe 7) were setup with no understeer, using the AYC to control the rear's natural tendancy to slide. Net result, a car that could be driven very quickly on tight & twisty roads yet remains stable and predictable. I found mine to be one of the most capable cars I have ever driven.
When coupled with the active center diff which can split torque as fast as the WRC unit, you are getting quite near to the WRC's equipment. Problem is they wear out and are not strong enough for motorsport. I had to replace the rear AYC of my EVO 5 (not repairable). New unit ~£3K + fitting but as many group N cars dumped the AYC for a stronger plated diff, you could pick up unused units for about £1.5K
Sounds like you know what you're talking about. I've read what you wrote once and I'm going to have to read it all again [].
How does the Subaru diff compare? Are they as good?
].How does the Subaru diff compare? Are they as good?
OK, with the help of wikipedia after reading your post several times I have a question.
The shafts that you speak of with the 15% difference in speed. Are they for the left to right diffs OR the front to rear diffs OR both (so there are 3 of them in total)?
TIA.
My original query was in regard to front to rear power distribution, not left to right although it's all interesting.
The shafts that you speak of with the 15% difference in speed. Are they for the left to right diffs OR the front to rear diffs OR both (so there are 3 of them in total)?
TIA.
My original query was in regard to front to rear power distribution, not left to right although it's all interesting.
Its only the rear wheels and only one wheel at that. When it operates it tends to pull or push the rear of the car. Near the gearknob are two accelerometers then measure the yaw & pitch of the car, the computer then applies ether a push or a pull on the rear to stabilise it.
The active center diff from EVO 7 onwards splits torque front to back as well.
The impreza is a more confusing issue, some have the ACCD which is a front to rear active torque split device, and some later versions include yaw sensors. The front and rear diffs are purely mechanical.
The active center diff from EVO 7 onwards splits torque front to back as well.
The impreza is a more confusing issue, some have the ACCD which is a front to rear active torque split device, and some later versions include yaw sensors. The front and rear diffs are purely mechanical.
So, they are not that technically great then.
And you say the WRC cars are the same with an experienced driver?
And you say the WRC cars are the same with an experienced driver?
bobafett
New member
I know each for there own, but that wing, OH Dear. looks like a Covin replica. The car looked great before.
I have to say there is a guy round where i live, very similar, but pepermint green, i am sorry but i reach every time it goes by.
Sorry, it will stand out but for all the wrong reasons.
This is of course my own opinion and hope it does not cause any offence.
I have to say there is a guy round where i live, very similar, but pepermint green, i am sorry but i reach every time it goes by.
Sorry, it will stand out but for all the wrong reasons.
This is of course my own opinion and hope it does not cause any offence.
proenca
New member
Mate, 300% agree with you.
Sorry from the 3 pictures you posted ( the owner ), the original, the bit modded with new wheels and such and now to its final iteration, my favorite, by FAR, is the original.
Recently I had a nice budget to buy a good car - after a while I settled that either be a Ferrari 355 or a Porsche 911. Was easy choice - Porsche is more practical, Im since 12 or so a die hard Porsche fan, was an easy choice. I had to put the Ferrari in the equation though - fitted the budget and why not ?
But after a couple of test drives, isn't really the car for me - 80% of the people when you pass by think you are a tosser, and out of those 20% left, 9 out of 10 are people who will reach puberty in a couple of years.
That makes us come back to your car - its definitely has that Ferrari appeal - I like stock cars or very subtle modded cars. I dont like transversite cars ( borrowing parts from other models ) or humongous rear spoilers and flappy front thingies and painted wheels - just not my thing.
But oh well, welcome to the club and I have to admit that you did some substantial changes in the car and even the paint looks good - but its just NOT my thing at all
Each to each own !
My 930 is a hack job too.
I have to admit that before I went to see the actual car I intended to revert it back to a stock look, apart from the paint colour of course.
Anyway, when I saw the car in the flesh I wasn't going to mess with it at all.
At least I have a normal carrera if I don't want to be called a W#nk3r.
What are peoples views on my 930? Good or bad? No offence taken, please be honest.
The car now has Sparco Evo seats and has Porsche crests for wheel centres.
I'm not keen on the number plate...
This is the actual car as stock, the top car.
I have to admit that before I went to see the actual car I intended to revert it back to a stock look, apart from the paint colour of course.
Anyway, when I saw the car in the flesh I wasn't going to mess with it at all.
At least I have a normal carrera if I don't want to be called a W#nk3r.
What are peoples views on my 930? Good or bad? No offence taken, please be honest.
The car now has Sparco Evo seats and has Porsche crests for wheel centres.
I'm not keen on the number plate...
This is the actual car as stock, the top car.
Thanks Garry.
Does anyone else have any comments?
Garry, you might want to check with your insurers first. Mine told me that a roll cage is a problem to get insured for. I wanted to do the half cage that was an option for the 964 3.8RS.
My seats are cloth and very grippy.
Does anyone else have any comments?
Garry, you might want to check with your insurers first. Mine told me that a roll cage is a problem to get insured for. I wanted to do the half cage that was an option for the 964 3.8RS.
My seats are cloth and very grippy.
Yes I agree, thanks.
I think the reason they were chosen is because they are an excellent quality wheel and were custom made for exact fitment.
I find the car a bit bling and pimp my ride but when you drive it you can't see it anyway, well, except for the rear wing through the rear view mirror.
I think the reason they were chosen is because they are an excellent quality wheel and were custom made for exact fitment.
I find the car a bit bling and pimp my ride but when you drive it you can't see it anyway, well, except for the rear wing through the rear view mirror.
I think it is a great looking car. The colour is great - wheels are a matter of taste, They may not be my first choice, but equally I would be more than happy to live with them.
You know that I have opted for a more "original" look, but I was struck at the first PCGB festival I attended 13-14 years ago (I had a 911SC then) that many of the Porsches had been modified. Some to a greater extent than others, but this was perfectly acceptable, if indeed not encouraged.
So, if you like it then that is all that matters!
best regards Simon
You know that I have opted for a more "original" look, but I was struck at the first PCGB festival I attended 13-14 years ago (I had a 911SC then) that many of the Porsches had been modified. Some to a greater extent than others, but this was perfectly acceptable, if indeed not encouraged.
So, if you like it then that is all that matters!
best regards Simon
Thanks Simon, seems we have similair views.
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