HomeBuilt 991 GT3 with manual?
12-20-2013, 07:44 PM
#16
BTW, if the rumors that the RS will have a true sequential with a clutch pedal (only needed to get underway or for more gentle downshifts) does come to fruition, would this satisfy those of you who want an H-pattern manual 3-pedal car? I'm not sure it would do it for me, but sounds interesting enough to try it!
I don't think it will be too hard to retrofit a 6 or 7 speed manual to the GT3, but I agree with others that say wait. Someone will do this (offer a kit or sell a complete car) sooner or later, and it will probably be a better and/ or cheaper total solution than going it alone.
12-20-2013, 11:15 PM
#19
Race Director
12-21-2013, 09:41 AM
#20
Burning Brakes
I have been begging to be asked to do something like this. It depends on whether or not you will ever feel like you have GT3 power if you start with a 9A1 991 spec Power Kit version motor and use bolt-ons to try and make up the 45hp difference. I think that with an ECU flash, headers, pulleys and high flow filters you could get awful close and still be at $10K max with parts and labor. The single biggest thing that you would not be able to overcome is that you don't have the wider rear quarter panels. You could easily get the suspension there by bolting whatever parts to it. If you started with a base 991 S, you would be at $100K for the donor car new.
For over a year I have hoped that there would be a niche of 991 owners driving 7-speed manual cars because they can't have one in GT3 form. The single biggest problem is that any GT3 purist will ridicule our not using the blessed architecture. I have no idea if it's possible but you could do some homework as to whether or not you could bolt a 996 Cup transmission if it had the same bell housing pattern but then you're hacking up a work of art in the GT3.
I would think that it would be better to bolt stuff to a 991 S than it would be to hack up the GT3.
For over a year I have hoped that there would be a niche of 991 owners driving 7-speed manual cars because they can't have one in GT3 form. The single biggest problem is that any GT3 purist will ridicule our not using the blessed architecture. I have no idea if it's possible but you could do some homework as to whether or not you could bolt a 996 Cup transmission if it had the same bell housing pattern but then you're hacking up a work of art in the GT3.
I would think that it would be better to bolt stuff to a 991 S than it would be to hack up the GT3.
12-21-2013, 10:04 AM
#21
Rennlist Member
A 2800lb 2014 cayman with a GT3 engine and 6 speed manual would make a lot of sence.
But that's assuming the 6 sipped bolts right up and can take 475HP.
It would be a real drivers car! But to make the price acceptable it likely would need to be in a 991 body.
But that's assuming the 6 sipped bolts right up and can take 475HP.
It would be a real drivers car! But to make the price acceptable it likely would need to be in a 991 body.
12-21-2013, 12:46 PM
#22
Rennlist Member
IMO, even more exciting would be a new GT3 motor transplant into a new, manual transmission Cayman, with appropriate suspension and aero mods. An instructor at my local track has a 3.8L Cayman (previous generation) with Interseries aero and suspension upgrades – a real no-expense-spared conversion and upgrade. It’s fast and looks fantastic, and always draws attention no matter how many other cars are out there. Starting with a car that has a manual transmission to begin with should avoid some of the electronic integration issues. And since the Cayman shares the same 9A1 block now used by the 991 GT3, it should bolt right up to the existing transmission flange. Besides having the advantages of a mid-engine layout, less weight, more compact overall dimensions but advantageously longer wheelbase than a 991, I’ve read the Cayman also has a real H-pattern manual, unlike the dumbed-down-PDK in the new 991. But I would imagine the cost of the engine alone would make the project prohibitive.
If you are a manual guy and want a dedicated track car, I think that putting in a 911 or 911 X51 variant engine in a regular cayman is a bargain and would make a great track car with a light frame and mid-engine handling. I believe john said he could put a 3.8L 400hp 911 engine in a cayman for around $20-25,000, depending on a few race upgrades. If you start with a brand new cayman, that's a nice car for low $70,000. If you buy a 3 yr old cayman, you could have that light mid-engine manual cayman track car with 400hp 911 engine for closer to $50,000.
John from BGB could give you better specifics.
12-21-2013, 01:38 PM
#23
Race Director
