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How hard would it be to engine swap a base 911 cab with a GT3 motor?
hello all, i cant really find much about this on the web, and i am wondering why more people haven't tried to do this. My ultimate 911 would be the 911 base cab with the standard suspension and all the comfort options but with GT3 engine power and a PDK (pretty much what the 911 S/T is, except i want a PDK, and a cab). Im finding 991 GT3 engine's for around $25k on ebay, and wondering how hard this would be to swap into my base 991 cab. Ofcourse i'd get an F series engine that doesn't blow up, but i dont want to get into those details right now just wondering how hard would it be to do the engine swap? You might say just get a GT3 touring, but the problem with the GT3 touring is that it has the GT3 suspension which is very stiff. Plus this would be a much cheaper way of getting to where i want. I would call it a GT3 Komfort, lolll. Hoping someone has knowledge of this on rennlist. Pic of my 991.1 cab below.
F series engines are still known to be defective. You need a G6 to be the most in the clear. You should just buy a 991.1 GTS cab or a Turbo Cab. A full swap would seem expensive.
the GTS cab is only 80hp more, plus i want the revving to 9k. But i dont want to get into a discussion about why i want to do this, im aware of every single 911 model that Porsche makes. i just want to know if anyone has experience attempting this or know of anyone that has. Plus, why would it be expensive? Its the same car with all the same computers, and obviously they make PDK GT3's so i actually dont think it would be expensive to do. Im mainly concerned about anything structural that would have to be changed that would make the project cost prohibitive or change the characteristics of the car. Like if we need to cut into the frame, things like that. That's why i want to hear from someone that has actual knowledge of this.
Last edited by mikescayenne; 01-22-2024 at 04:13 PM.
This seems like an interesting idea at first, but the more I think about it, the more it seems to be better left a fantasy. I get the impression that such a swap would require way more than just an engine. You're probably looking at a new ECU, changes to the fuel system, a new exhaust, etc. My guess is that this swap would probably cost twice as much as that engine does by the time it's all said and done.
I'd also be willing to bet that the car you produce, although nifty and neat, will be less valuable and less desirable than it was before it was totally eviscerated.
Sometimes i think about this to as well. I think you’ll need a few things to make this turn key. You’ll need the body harness out of a 991.1 GT3 you’ll also need the engine harness as well along with the dme. Price also go’s up if you aren’t doing the swap your self. Anything can be done with money.
Sometimes i think about this to as well. I think you’ll need a few things to make this turn key. You’ll need the body harness out of a 991.1 GT3 you’ll also need the engine harness as well along with the dme. Price also go’s up if you aren’t doing the swap your self. Anything can be done with money.
He probably can’t use the body harness from a GT3, as it was never sized out to go in a Cab. My guess is there’d be more than one place on the harness where it would have to be routed through the car in a way other than it was sized for. He could always try to fabricate a custom one, but that’s no small undertaking.
Trailblazing swaps are very expensive — expensive, like I am not sure that you would save any money over an ST given that you would need basically a fully intact GT3 donor to do this swap. Pieces would have to be engineered and fabricated to make this work.
you guys know i dont want to change anything except the engine, right? why would it be very expensive? i dont want to change the suspension, dont want to change transmission. the whole point is to have the comfort of the base model, but with the power of a GT3. The only thing i can see having to beef up is the cooling and fuel injectors, maybe have to get GT3 fans/radiators but that wouldn't be that expensive. Ofcourse ill buy an engine with the ECU included. Everything else would stay in the car as is.
@keebin just wondering why would i need the body harness out of a GT3?
Last edited by mikescayenne; 01-25-2024 at 01:43 PM.
you guys know i dont want to change anything except the engine, right? why would it be very expensive? i dont want to change the suspension, dont want to change transmission. the whole point is to have the comfort of the base model, but with the power of a GT3. The only thing i can see having to beef up is the cooling and fuel injectors, maybe have to get GT3 fans/radiators but that wouldn't be that expensive. Ofcourse ill buy an engine with the ECU included. Everything else would stay in the car as is.
@keebin just wondering why would i need the body harness out of a GT3?
Sounds like you should call an actual shop that does these, as we're just giving you speculative answers. You seem to be under the impression that this can be done cheaply and looking for support on it, but we're telling you otherwise. Time to call a professional.
What about a Flat 6 Innovations engine upgrade? Don't know the exact horsepower, but I would bet it's in the GT3 range. Not a clue about the cost. Kinda interested in this option myself. I love my 991.1 C2S, but it would be awesome with some more power. I think one downside is that, let's say it costs $35K. I'd still have a 991.1 C2S. Nobody is going to care that I spent $35K on an engine upgrade. Probably won't get much more for it than if it had the stock motor. https://flat6innovations.com/9a1-9a2-engines/
Last edited by Wolpertinger; 01-25-2024 at 02:20 PM.
01-22-2024, 03:46 PM
How hard would it be to engine swap a base 911 cab with a GT3 motor?
