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carrera to GT3 upgrade, need some advice

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Old Feb 11, 2015 | 06:44 PM
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Question carrera to GT3 upgrade, need some advice

hello guys, im new to the forums and i wanted to ask some questions to see if anyone could help me. i already posted this on the GT3 forums but wanted to see if anyone here could help me out as well. just read below.

i bought a 2001 996 carrera about a year ago as a project car. it is the first porsche i own and my first full project car. i bought it at an auction clean title but the car was striped almost to having nothing on the outside and was missing the engine and transmission. my plan for the car was to slowly buy parts for it to upgrade it into a GT3. so far what ive been able to buy are the bumpers and the wing along with the rims and upgraded breaking kit that the GT3 996 uses and i also switched out the suspension. the main thing i want to ask is this, does anyone know what engine and transmission i need to buy in order to keep it up with GT3 specks. because from what ive read online the GT3 has a 3.6 engine but im not sure if it uses the same 3.6 engine as normal 996 models. and if does not use the same 3.6 i want to know if the GT3 engine would even fit a normal 996 coupe.

thx in advance for anyone who can help!
 
Old Feb 12, 2015 | 06:45 AM
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The engines are not the same if I recall correctly. The GT3 has a Mezgar engine with a dry sump, it also produces 355Hp and is a "split" crankcase. In turn the transmissions are different as well and is more of a racing transmission than a street one. Although they are similar the GT3 is totally different when you break the components out.
 
Old Feb 12, 2015 | 06:59 AM
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Originally Posted by FLA996TT
The engines are not the same if I recall correctly. The GT3 has a Mezgar engine with a dry sump, it also produces 355Hp and is a "split" crankcase. In turn the transmissions are different as well and is more of a racing transmission than a street one. Although they are similar the GT3 is totally different when you break the components out.
Alright thx for the info, but do you know if the engine would fit into the engine compartment of a standard 996?
 
Old Feb 12, 2015 | 07:34 AM
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This is not very cost prohibitive IMO. Some other big obstacles I see is that you will have to replace the roof skin if yours came with a sunroof. Another is if you have a c2 rwd model, which I'm assuming you do if you put gt3 suspension on there, is that you don't have the same chassis as the gt3. The gt3 shared the same chassis as the c4 model which had reinforced front tub area for greater rigidity. I'm not sure if you replaced all or only the front two hubs when you did your gt3 brake upgrade either. Did you replace your front radiators and add in the center radiator to gt3 specs?

Engine and tranny will fit but you'll need new wiring and ecu/immobilizer/keys too.

Considering the cheapest bare bones gt3 motor I saw was 15k, you're probably talking at least $25k for full engine/tranny/ecu/wiring/immobilizer combo without labor if you're lucky.
 

Last edited by alpine003; Feb 12, 2015 at 07:38 AM.
Old Feb 12, 2015 | 08:17 AM
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Originally Posted by alpine003
This is not very cost prohibitive IMO. Some other big obstacles I see is that you will have to replace the roof skin if yours came with a sunroof. Another is if you have a c2 rwd model, which I'm assuming you do if you put gt3 suspension on there, is that you don't have the same chassis as the gt3. The gt3 shared the same chassis as the c4 model which had reinforced front tub area for greater rigidity. I'm not sure if you replaced all or only the front two hubs when you did your gt3 brake upgrade either. Did you replace your front radiators and add in the center radiator to gt3 specs?

Engine and tranny will fit but you'll need new wiring and ecu/immobilizer/keys too.

Considering the cheapest bare bones gt3 motor I saw was 15k, you're probably talking at least $25k for full engine/tranny/ecu/wiring/immobilizer combo without labor if you're lucky.
Mine did come with a sun roof but im not planing on changing the skin because I wanted it with a sun roof. The modle I have is a c4 so the chassis is the same as the GT3 thats one reason why I decided to convert it in the first place. As for the radiator from what ive been told the front ones should be fine for the specs I need but I dont have a center one however im still looking to find and buy one to fit It. Like I said the is still a work in progress and is still missing alot mechanicly. As for the breaks I replaced all of them. Even got new rotors because the old ones were worn out. And for the wiring I had the front and rear housing already.
 
Old Feb 12, 2015 | 04:30 PM
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I'm a bit confused. Are you using OEM gt3 coilovers/sways/control arms?

Are you using OEM GT3 brakes including the gt3 hubs? If so how much did you get those for?

If using OEM gt3 stuff the project doesn't really make sense to me financially.

As for the motor, you are probably better getting a new 3.8 or 4.0 m96 stroker and if you must get your tranny regeared and want to get LSD, maybe have GT Gears do all that.

Plus your insurance will only cover you for base Carrera if you get into an accident, unless you get agreed upon insurance, but then you'll be paying higher premiums.
 
Old Feb 12, 2015 | 05:29 PM
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Originally Posted by alpine003
I'm a bit confused. Are you using OEM gt3 coilovers/sways/control arms?

Are you using OEM GT3 brakes including the gt3 hubs? If so how much did you get those for?

If using OEM gt3 stuff the project doesn't really make sense to me financially.

As for the motor, you are probably better getting a new 3.8 or 4.0 m96 stroker and if you must get your tranny regeared and want to get LSD, maybe have GT Gears do all that.

Plus your insurance will only cover you for base Carrera if you get into an accident, unless you get agreed upon insurance, but then you'll be paying higher premiums.
Im trying my best to keep all the parts OEM gt3 parts. Atleast the parts that the car was missing when it was Taken apart. The coils, sways, and the arms are original gt3 parts. I bought them from a porsche junker who had some in great condition. I got all of them togethere for $500 and i Plan on installing them myself. As for the brakes I got the calipers from champion porsche because I could not find any in the condition I desired and they are OEM GT3 calipors. And i bought the rotors off of another junker for 400 and they are literally out of the box new, I would guess they have less than 200 miles on them. The hubs I got off of the same junker along with rims for the car. The hubs I got for $90 each and the rims were were $750 for all 4 but I need to have them repainted.
 
Old Feb 13, 2015 | 07:25 AM
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You got some great deals and it sounds like it's all coming together. Good luck finding a gt3 engine/tranny. Post pics and updates of your progress or it didn't happen.
 
Old Feb 13, 2015 | 08:43 AM
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Originally Posted by alpine003
You got some great deals and it sounds like it's all coming together. Good luck finding a gt3 engine/tranny. Post pics and updates of your progress or it didn't happen.
These pics are a bit old their from 8 months ago But its still what the car looks like now. I havent done much to the car lately because I want to buy the engine before I install the coils and everything else. Why bother to put the car up and down on a lift more than you need to if you can do it just once.
 
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Old Feb 13, 2015 | 11:22 PM
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Originally Posted by formerfrost
These pics are a bit old their from 8 months ago But its still what the car looks like now. I havent done much to the car lately because I want to buy the engine before I install the coils and everything else. Why bother to put the car up and down on a lift more than you need to if you can do it just once.
The pics show mk2 sideskirts and rear wing on a mk1 body. Are these pics prior to the gt3 brakes you got? Also the rear wiper needs to go if you want to make it look like a gt3.
 
Old Feb 14, 2015 | 08:38 PM
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Originally Posted by alpine003
The pics show mk2 sideskirts and rear wing on a mk1 body. Are these pics prior to the gt3 brakes you got? Also the rear wiper needs to go if you want to make it look like a gt3.
This picture is old like I said but the car looks exacly like this now. The only things I've put on the car are the rims and the wing because the car did not have the rear door on It and i wanted to see what the rims looked like on the car lol. Plus it was literally rolling around on 4 bricks instead of wheels. So I had to put something on the car to make it easy to move. And those are the brakes the car came with, the brakes I got are on the car but I dont have a current pic of it. As for the rear wiper im thinking about removing it but havent decided yet.
 
Old Feb 14, 2015 | 08:44 PM
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Let me ask you guys this. What are your opinions on puting a gt2 engine into the car instead of a gt3 engine? Theres a car that mite be going up for sale soon its a gt2 with some rear collision damage. I was thinking I can get what I can off the car and then try to Sell what I dont need. Or do you think I should just stick to my original plan?
 
Old Feb 14, 2015 | 08:48 PM
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www.iaai.com/Vehicles/VehicleDetails.aspx?auctionID=0&itemID=18185823&Ro wNumber=33&loadRecent=True

Heres the link I forgot to put it. The car is a different color but I can repaint everything. The wing looks like its not worth salvaging though. And i can take the tranny off and put it in my car along with the engine. And even get all the suspensions and brakes of and stick them in my car and just sell what I have. Depending on what the car sells for at auction I can get about half my money back.
 
Old Feb 15, 2015 | 09:02 AM
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Originally Posted by formerfrost
Let me ask you guys this. What are your opinions on puting a gt2 engine into the car instead of a gt3 engine? Theres a car that mite be going up for sale soon its a gt2 with some rear collision damage. I was thinking I can get what I can off the car and then try to Sell what I dont need. Or do you think I should just stick to my original plan?
My $.02

I think you'll be taking a good amount of risk with the gt2 car considering it's been rear ended. You won't be able to inspect any micro cracks and other issues on the block in an auction. Depends on how much of a gambler you are.

As for the gt2 vs gt3 motor to have in your ride will depend on a few things.
If you're going to track it, the gt3 is more controllable and you will be able to more easily tame it and get better track times, not to mention control heat issues better in longer runs.

A GT3 clone would look kinda funky with side scoops which you'll definitely need for cooling intercoolers.

Lastly, it would depend on how much of a purist you are or how true of a reproduction you're willing to create.

As you can tell, I don't really care for mixing mk1 and mk2 parts but that's just me.
 
Old Feb 15, 2015 | 09:57 AM
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Originally Posted by alpine003
My $.02

I think you'll be taking a good amount of risk with the gt2 car considering it's been rear ended. You won't be able to inspect any micro cracks and other issues on the block in an auction. Depends on how much of a gambler you are.

As for the gt2 vs gt3 motor to have in your ride will depend on a few things.
If you're going to track it, the gt3 is more controllable and you will be able to more easily tame it and get better track times, not to mention control heat issues better in longer runs.

A GT3 clone would look kinda funky with side scoops which you'll definitely need for cooling intercoolers.

Lastly, it would depend on how much of a purist you are or how true of a reproduction you're willing to create.

As you can tell, I don't really care for mixing mk1 and mk2 parts but that's just me.
Honestly I gave it some thought and I sapose your right. I have had luck before when buying cars like this at auction. Thats how I got this porsch in the first place. Clean title no crash history and it was missing alot but it was Still a steal at 2 grand. But with this gt2 with such a hard hit on the rear I shouldent bother. As for my car I think I mite just settle for a regular 3.6 engine that I can get more easily. The last time i saw a gt3 crashed in the front was a year ago. And who knows when ill see another one. Plus if I really wanted an authentic gt3 I would of just gone out and bought one. Im even thinking about buying the rear seats for the car when I buy the interior lol. But havent decided yet.
 


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