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Interesting project... I'm not sure how different the harnesses are, but I would think they are almost certainly not the same. The mezger engine doesn't share much (or anything?) with the S engine, so I would imagine it has different sensors and actuators. You would probably be ahead of the game if you found a GT3 engine harness and ECU. I'm not sure what kind of security "Drive block" is built into the GT3 ECU, you may be looking at a stand alone to run this thing. People have put GT3 engines in aircooled cars before, so maybe some of this information exists if you search for GT3 swap in the forums for the older hot rods. This project will probably take some tech knowledge to pull off. Good luck, hope you find what you need!
Completely different engines between GT3 and Carrera. Even the DME is different .1 GT3 Bosch, .2 GT3 is Siemens. If your serious you would need a complete engine harness and go motec. By the time your done it would be money not well spent.
Wow, I didn't realize that even mounting it was such a project. It would probaby be cheaper to higher than company to do the whole project than trying to learn how to do this project from scratch. That said, expense isn't always the motivation for people who do their own work, sometimes the project is just calling to them.
Wow, I didn't realize that even mounting it was such a project. It would probaby be cheaper to higher than company to do the whole project than trying to learn how to do this project from scratch. That said, expense isn't always the motivation for people who do their own work, sometimes the project is just calling to them.
Cheaper still to simply buy a GT3 and be done with it.
Cheaper still to simply buy a GT3 and be done with it.
That used to be the case for sure, but .2 GT3s are all listed around $150k right now. If he could still sell his base car for $50k, and the GT3 engine was $30k used, I figure $20k installation, still leaves him $50,000 short of a real GT3. The problem there is having $100k invested in a car thats still only worth $50k. Again everyone is not motivated by money on these projects. The car could have sentimental value. Who knows. But yes, typically any car modifications are a waste of money, and you should just buy the car you want, pre built.
That used to be the case for sure, but .2 GT3s are all listed around $150k right now. If he could still sell his base car for $50k, and the GT3 engine was $30k used, I figure $20k installation, still leaves him $50,000 short of a real GT3. The problem there is having $100k invested in a car thats still only worth $50k. Again everyone is not motivated by money on these projects. The car could have sentimental value. Who knows. But yes, typically any car modifications are a waste of money, and you should just buy the car you want, pre built.
Yeah accept that if you bought a GT3 for $150k, it's worth $150k. This Carera with ab GT3 swap will not be worth what you put into it. The cost of fabrication is a wash and I'd say you'd retain 1/2 the value of the gt3 engine. so... 65k ish.
That used to be the case for sure, but .2 GT3s are all listed around $150k right now. If he could still sell his base car for $50k, and the GT3 engine was $30k used, I figure $20k installation, still leaves him $50,000 short of a real GT3. The problem there is having $100k invested in a car thats still only worth $50k. Again everyone is not motivated by money on these projects. The car could have sentimental value. Who knows. But yes, typically any car modifications are a waste of money, and you should just buy the car you want, pre built.
But you don't.
You still need to improve the brakes, suspension, and getting the chassis rigidity from a Carrera (if memory serves) is simply not practical. Murphy tells us that we will always underestimate the magnitude of the job, too.
In the end you have a Frankenstein car that will not be worth what you invested because few people will be interested in buying such a car. The reality is what it is. What few buyers that exist off the normal distribution curve for a highly modified Carrera will be impressed, but skeptical of the work regardless of how well documented.
Additionally, any GT3 (997 or 991) will increase in value at a better rate than the Carrera just based on production numbers.
There are some 991.1 GT3s out there that would come close to the project cost, but you need to do your homework and select wisely. The 991 GT3 would give you even higher performance and similar creature comforts of the 997 Carrera.
Then again, if the original poster is just looking for a fun project and doesn't care about the costs, that's probably another matter. I know I couldn't justify the expense and I am both humbly and lucky to have what I own now. And yes, my car does have sentimental value, too. Need to get out and drive it now.
I would just buy a GT3. It will be more cost effective and you will have a car that will keep appreciating. There are a few 997.1 for sale now in the classifieds that’s are reasonable priced. You can also buy Drola’s red GT3. Good luck in whatever you decide to do.
Last edited by Robocop305; 02-05-2022 at 01:37 PM.
If I happened upon a reasonably priced GT3 engine and was on the lookout for a fun long term project, I would do a transplant into a non-911 model. A 914 ->916 for example would be quite a project but an amazing result. Sure this approach will require bespoke engineering and substantial fabrication, but the output would be a very personal and unique vehicle that still has all Porsche genes. If done to a very high level of quality, it might even be a money maker on BAT someday. Yeah, it would almost certainly be Motec but that's quite doable. 914 platform already has proven that adding water cooled powerplants is feasible (Renegade Hybrids).
But installing into a 997 unless you start with a complete crashed GT3 and get the 997 free, seems a good way to get pretty upside down.
02-04-2022, 10:31 AM
