vandersmith

Been searching through the forums all night trying to get a definitive answer on what uprights I need to find to complete my RWD conversion and correct the front suspension geometry.

I've read through just about every post here and 6speed and none of this has been easy to verify directly.

Current:
Calipers: 996 GT3 Front/Rear (142mm spacing)
Rotors: 997T 350mm Dimensions/Offsets (I also have a set of spare 996GT3 rotors that came with my calipers.)
Coilovers: KW V3 for 996TT
Mounts: Tarett Monoball for AWD 996s
Arms: All Adjustable

Future:
New Uprights that can use my Calipers and either set of rotors
New GT2/3 coilovers, probably Ohlins R&T
New correct strut mounts if needed

Questions:
What spindles/wheel carriers do I need to find without breaking the bank? The current GT3 part #s I have are:
99634115791
99634115891

There is a rennlister selling a set of uprights with hubs, etc. from a 2007 996 Cup but when I reference the part numbers provided it pulls up Boxster S, etc?
L- 99634165713
R- 99634165813

Is it possible these are 142mm spacing and have the same strut dimensions by chance?

What about 997s? I read that the 997.1 C2S wheel carriers might also work but need to find out more. There may be an issue with the wheel sensors.

Any help is greatly appreciated!

"02996ttx50

our esteemed carreradave here of the e-ram fame sells the stubbed axles kit http://rennkit.com/product-info/phenix-engineering/

all inclusive. might be the way to go.

sub'd and GL!

vandersmith

+1 for Rennkit - My Toth splitter is from them and its a gem piece.

Those stubs would have been a much smarter solution to my hammer and pry job on my half shafts. I converted to RWD last year with the diff removed and stubs matched with GT2 alignment.

Absolutely loving how the car behaves and handles and am now looking to go all in and correct the entire suspension setup - New Uprights, Coilovers, Mounts

All I need really is confirmation/guidance on what the lowest barrier to entry is for these uprights. Do they have to be GT2/3 or are there cross-part numbers with other Porsches that I can use that will allow me to keep my 996GT3 brakes?

If we get this sorted I will write the definitive complete RWD conversion bible. Beyond just dropping the driveshaft, diff, etc.




Out.

"02996ttx50

i'd ask pwdrhound at this point, or anyone that's fully converted. far as i know.? everyone uses gt2/3 uprights. i just thought it was a timely find, and might help. but re the axles; plenty of "home schoolers' have stubbed their own i saw some spindles etc for about 600 a pair. in fact i think the guy on 6spd that re-did my calipers makes em too.

i'll be following your thread(s) since i'm only *half way* there on my own rwd escapade and may in fact connect all the proper bits one day. i'm currently, 2wd but still with stock geometry, though the stance is flat as i need and it works terrifically for me. at least i installed the wavetrac

i didnt notice the mention of an lsd in your parts list? but im assuming you've either put one in, or will. pwdrhound will tell you the guard is the only choice for tracking. i'll just say the w'trac is incredibly efficient, won't need rebuilding, and is warrantied for life at 1200 bucks. its literally, the best modification my car has.

so, again gl, i'll be following your progress!

vandersmith

Hopefully he'll chime in, I'll shoot him a PM too as it would be great to hear direct from a great resource.

The car runs fantastic with the current RWD conversion. First PCA event is in April so I've decided I either do this now or wait until the end of the season. I'm impatient.

For LSD - I've got the OS Giken 40/60 LSD in with a Clutch Masters FX350 clutch. Works awesome. Its insane how stable the car is coming down into Turn 1 after the straights and how much more throttle can be applied through Apex.

Lots of work in this car, I'm sticking with it. This conversion is literally the only thing left on the list!

32krazy!

going to have to be gt2/3 for non awd setup if you want that geometry. i know of a set of gt3 spindles but they arent cheap

powdrhound

The 996.2GT3 upright are shared with the 996GT2 and 996.2Cup. If I recall the 996.1Cup has older style uprights but don't quote me on that. Boxster and C2 have different uprights with smaller bearings and different geometry. The 997Cup stuff is good with better geometry but you will need to change out all of the rear suspension to match the different roll centers.

To make things as painless as possible, this is the conversion kit you will need. It includes the uprights, bearing, bearing cover bolts, tension bolts, heat shields, brake line brackets, and ABS sensor heat shields. The part numbers are:

996 GT3 cup uprights: 996.341.157.91 and 996.341.158.91
Front bearings (2x): 999.053.054.06
Front rotor heatshields: 996.351.801.30 and 996.351.802.30
ABS sensor heatshields: 996.606.235.91 and 996.606.236.91
Cover bolts (8x): 999.217.042.09
Brake line brackets: 996.355.501.06 and 996.355.502.06
Tension bolts (2x): 996.341.131.04

You will need different brake rotors as the offset on the TT 350 rotors is 1.5mm different. You need GT2/3 specific brake rotors.

[url=https://flic.kr/p/fzqFcw]


You will also need new front upper mounts, either OEM GT3 or others that will come with your suspension of choice, JRZ, Ohlins, etc. Finally, it would be smart to replace both front hubs so you are starting fresh. Hubs are cheap at about $275 each.

Not sure if you are in a hurry, but I will have a lightly used JRZ RS Pro suspension for sale in the next month or so. These are 2 way shocks with remote canisters, quick disconnects on all corners, JRZ upper mounts, front and rear, Tarett extended front drop link brackets / drop links, rear drop link brackets and Tarett drop links (not pictured below). It's full monoball through out, basically the works with everything you'll need, ready to bolt on. Springs are Eibach race springs, 900# front, 1000# rear. First $4200 takes it.

powdrhound

The GT3 spindles are about $200 each. A few years ago they were $50. I am in the process of having some trick GT3 spindles machined that will have an interchangeable ABS toothed ring. This will allow you to install 47 toothed ring if you want to run the stock ABS with 997GT3 or Cup sized tires. The stock ring has 48 teeth.

vandersmith

This is INSANELY helpful. Thank you powdrhound!

I can't seem to locate a set of the GT3 uprights. Anyone have any ideas?

32krazy!

i meant spindles as in the complete upright assembly from a wrecked gt3

vandersmith

PM'ed let me know!

"02996ttx50

absolutely, this is just as true in a 60mph canyon sweeper as i can imagine it'd be on the track. its a blast of stable predictability and i keep trying to explain that even this tbd locks on braking, no wigglewag lol...

so you've got some serious parts though i've never driven a giken equipped car but anything that gets those wheels working together is ok with me.. and you're well on your way.

think i'll go read your rwd/track thread now lol. cheers.

911mhawk

Add front hubs to this - PN 997.331.605.01
Rear turbo hubs are " " " .03 if you decide to put a fresh set of those in too.
My original bearings were getting rough at 70k, assuming they were original.

vandersmith

EXTREMELY helpful. Thank you guys for all of this, appreciate all of it!

Here's what it comes to at Sunset Porsche minus the uprights:



Here's the same quote from Pelican (about $200 more)



Pretty much everything is cheaper through Sunset other than the wheel bearings which are $30 less each on Pelican.

Here's what I can find on the Uprights:

Pelican has the Left for $463 and the Right for $463.

ECS Tuning happens to have only the Left Upright for $389 and not the Right. So I could save about $80 on the Left at the very least.

Any other places I should be looking?

993GT

IMHO, just go 997GT stuff....if your spending the funds on uprights/coilovers....go latest
simpler sway bar setup...better geometry
if you want 996 stuff, want my full 6T2 Ohlins/suspension/brakes setup?