996 CTR
 

CTR = Carrera Turbo R

Actually I'm not really sure which would be the correct forum for this creation of mine, but while it shares a great deal of parts from 996 GT2/3(/turbo/Cup) this could be a proper place to be.

One upon a time it was an aerokitted 996, MY '00. Then it got some stuff, in and out and now it is what it is.

Specs in next posting, now just some pics.


https://cimg6.ibsrv.net/gimg/rennlis...266d7c2ec3.jpg © Arska

F: 265/35-18 & 10x18 et 37 R: 295/30-18 & 11x18 et5
MPSC2 & NTM Racing wheels

https://cimg3.ibsrv.net/gimg/rennlis...6d04eb53b0.jpg © Tero Niemistö

https://cimg1.ibsrv.net/gimg/rennlis...1aaafe65e5.jpg

https://cimg5.ibsrv.net/gimg/rennlis...e56cb65c8b.jpg

https://cimg7.ibsrv.net/gimg/rennlis...30f5ad4f7d.jpg

https://cimg9.ibsrv.net/gimg/rennlis...8f413db2ac.jpg

With driver (85kg), helmet & stuff, laptop and 70l of fuel.

Specs:

Body
-2000 2wd
-89l tank conversion, including appropriate bulkhead
-CF front bumper*, front hood*, roof*, front fender vents** and rear fender extensions***
-front fender extensions are 993GT2's, GRP over OEM steel fenders (to maintain OEM Litronics)
-Joe Toth's canards
-splitter, side skirt extensions and rear "diffuser" in CF, DIY shape, vacuum bagged and baked...
-Lexan side and rear windows
-996 GT3 CUP rear hatch and wing (aftermarket) and Demon Speed Motorsports wing uprigts, the tall ones
-RUF Rturbo inspired IC inlets in steel
-996 GT3 RSR rear bumper in CF***
-997 GT3 flat bottom panels with appropriate rear brake cooling ducts
-front fender liners customized to vent radiators into wheel wells and out from fender vents
Complete respray in OEM Arktissilber Metallic, L92U

*ACC-Porsche-Teile
**Zimspeed, 997 GT3RSR, modified
***Zimspeed, 996 GT3RSR

Suspension and brakes
-Bilstein Cup 3-way adjustable coilovers w remote canisters, valved for 120 / 160 N/mm Eibach springs
-997 GT3 front uprights
-997 GT3 adjustable sway bars
-GT3 2-piece LCAs F&R, F inner parts are from 997 GT2RS (15mm wider)
-9products adjustable toe control arms and locking plates, w bump steer correction
-Rennline adjustable front diagonal arms
-9products upper rear control arms
-9products sway bar drop links
-997 GT3 front camber plates with 9products "transfer plates" (top mounts are 25mm outboard from OEM)
-997 GT3 front subframe, rear subframes are from 997 Cup
-all bushings are monoballed
-991 GT3 calipers F&R
-Brembo 2-piece 380mm discs F&R
-Pagid RST pads
-996 GT3 MC and brake booster, electric vacuum pump in front compartment
-CUP's electric power steering pump
-PSM switchable fully off

Wheels: NTM Racing (Italy) Pista III 3-piece, 10x19 et 35 & 12x19 et 40
Tyres: MPSC2, 265/30-19 & 325/30-19

Front and rear widths, measured from wheel's outer edge at hub's height are 1840 & 1880 mm.

Interior
-full GT3 interior, rear seat delete
-radio delete
-AC
-9products steering wheel extension
-Rennline pedals
-Alcantara this and that instead of OEM leather imitation
-GT3 front console delete, center console painted in body colour
-instument and HVAC panels from 996 turbo (to work with ME7.8)
-Cobra Suzuka Pro seats in leather and houndstooth fabric
-6-pt harnesses
-Heigo 6-pt rollcage with FIA padding
-fire extinguisher in front pax footwell as in GT3s
-Race Technology DL-1 datalogger with Dash 3 display

Engine
-996 turbo, redline at 7200 rpm
-9products LW underdrive pulley
-all air routing in and out from the engine are from 997, including 997.1 VTG turbos
-do88 ICs
-do88 turbo inlet hoses
-do88 Y-pipe and plenum
-dual 997 turbo MAFs, signals summed up in a adjustable converter box
-SAI delete
-Bosch EV14 injectors, 1200 cc
-3,0 bar FPR
-Walbro GST525 pump
-AN8 fuel line
-custom 3" exhaust, 100 cell cats and Burns Stainless mufflers, X-type center exit
-ME7.8, tuned by erikoismoottori.fi
-external electronic controller for turbos, tuned by myself
As far as I know, this is the only 996 turbo engine in the world that has electronically controlled VTG turbos installed. Lot of work, but someone just had to do it! ;)

Transmission
-basically 996 turbo transmission, but
-front and center casings are from 996 GT3 Cup, as well as oil cooling system
-997 GT2 mainshaft and 1st & 2nd gears
-Guard's straight cut 3rd
-steel synchros
-CMS shift arrester
-997 GT3 Cup LSD
-Sachs Motorsport PP and unsprung clutch disc
-GT2 (actually Carrera) MC and slave
-LWFW
-996 GT3 Cup shifter and cables
-semisolid engine (Wevo) and transmission (DIY) mounts

RPM Drops / Based on 6200 RPM:
1st to 2nd = 2480
2nd to 3rd = 1726
3rd to 4th = 1109
4th to 5th = 1107
5th to 6th = 1280

Few more pictures.

Last weekend's Time Trial, raining all Saturday.

https://cimg0.ibsrv.net/gimg/rennlis...d77edec54b.jpg

Slippery when wet C: Antti

Sunday's trackday was on dry track.

https://cimg2.ibsrv.net/gimg/rennlis...1c57dcd787.jpg

Point-by works... =D

https://cimg5.ibsrv.net/gimg/rennlis...78eb65417d.jpg

Pete - Incredible build.

How hard was it to get the 997 underbody pannels to fit on the 996? I've thought about that many times after seeing how much better the coverage is on the 997 under body.

Thanks!

It's not that difficult in the end. Minor cutting on the edges close to front and rear lifting points and then 5 mounting points per side needs to be added. Rivnuts & bolts or OEM Porsche "rivbolts", which are riveted in and look like those threaded tabs where all panes are attached with plastic nuts. Threads about this can be found either here or 6SOL.

Looks great Pete! What Lexan rear windows are you using? No need for security straps? What's the thickness? I was thinking of installing the 997GT3RS 4.0 Euro rear OEM lexan window but I'm not 100% sure if the 996/997 rear window is interchangeable. I'm thinking it is but don't have a confirmation. Thx

Pete, thanks for sharing, an amazing build and must have been (ongoing) great fun building that beast.
I love the air intakes on the rear wings do they have any specific channelling onto the intercooler cores ? Would love a pic looking into the opening ?

Great build Pete, as mentioned on 6speed. :) Very cool stuff.

I researched this as well-- if it doesn't fit it is really close. I saw a lexan rear from a 997 cup in the classifieds and was thinking could test with that, but decided to focus on the wheels/brakes/suspension instead. Compared my car with a friend's 997 side by side and can't tell any difference in dimensions as far as what is visible.

I'm sure you already know this, but I wouldnt run without straps with USA track rules-- Pete's windows are raised in all the pics so I imagine he's fine because of that; I've read a few threads in my research where guys in Europe with the OE lexan windows have their rear blow out on the road when going high speed with the windows open.

I've got an idea for some straps that are both functional and look a bit nicer than the sheet metal and screws I usually see. Function over form always, but I notice the lexan rear engine cover on 360 Challenge Stradale that lives in the same warehouse as my car, it has 2 carbon straps for bracing with countersunk allen bolts... Functions the same, but looks less Home Depot than some of the cars I see.

That is why I was inquiring into using the OEM street 7GT3 4.0 lexan window. If is it used on a factory street car than it has passed all safety tests including blowing out at top speed with the windows down. No way the car the car be certified other wise..

Thanks for the compliments!

Toby, there's channels to ICs, biggest that could be built to still basically narrowbodied car. There's a body seam with high tensile strenght (whatever) steel which can't be cut (=is not wise to cut unless one knows how to maintain body's strength), so that limits size of the duct. Try to post a pic later.

John, rear windows are from Plastics 4 Performance (UK), OEM size and thickness (3mm). Installed with provided PU adhesive and OEM frame & rubber gasket. We have here the luxury of driving windows closed at tracks and I have tested them up to 280kmh. I definitely will not do that windows open! I think P4P will tell if 6 and 7 windows are of same size, I do believe they are.

Thanks Pete! I looked at P4P a while back. They offer the windows in 3, 4, and 5mm thicknesses. I was thinking of getting the 4mm thick ones as they would be more rigid than the 3mm with only a minor weight penalty. The 4mm rear may not need additional bracing but who knows? If I can verify my 996/997 rear glass is the same then I will go with the OEM Euro RS rear lexan for peace of mind and perfect fit.

I thought the same thing, but then heard some stories. Not sure if it is common or not, but it is a possibility. Perhaps not tested at speed with windows down during certification?

OEM windows installed from factory in euro-spec car, more than one mentioned here...

https://rennlist.com/forums/997-gt2-...-blow-out.html

edit: maybe location played a role in the failure in that thread due to the extreme heat in the region....

Not to detract from the awesome build.
Is the lexan rear screen for street same as a Cup car ?
If so - i can assure you it WONT fly out if correct adhesive is used.

Ya gotta JB weld that sucka!

Latest pic