996 GT3 rear 350mm rotor conversion worth doing?
#1
Pro
Thread Starter
996 GT3 rear 350mm rotor conversion worth doing?
While rebuilding and refinishing my calipers, it reminded me that the 350mm rear rotor conversion existed. I don't see many people mentioning this, leading me to believe it might not be worth doing.
Thoughts?
J
Caliper ****-
Thoughts?
J
Caliper ****-
#2
Race Car
I have 350mm girodisc on the rear of my car just for the 350mm upgrade. IDK that it's a monumental difference but helps settle the rear a bit under braking and I went to lighter rotors at the same time so it was a win / win for me. Rears last 2-3 seasons so the cost of the rotor replacement isn't nearly as big of a deal as the fronts that go quite a bit more often.
#3
You can use 997.1 rears as they are a direct fit. I am the European distributor for Alcon discs for Porsche & we offer 360mm floating rear discs. As above, the difference isn't really huge, but it does help keep the rear tied down under trail braking.
#4
Three Wheelin'
When I had my 996 I converted to 350mm rear. Also used Pagid Black in rear and yellow up front. The 996 is heavy forward brake biased and I found that increasing rear rotor and using grippier pads in rear help keeping the rear of the car behind the front axle especially during trail braking
#5
996 needs all the additional rear bias it can get
#6
Pro
Thread Starter
Oh, I know I need more rear bias. I'm trying to avoid running different compounds. The spacers and the turbo rotors seemed like a decent option with a low entry fee.
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#9
RL Community Team
Rennlist Member
Rennlist Member
I had the 350/350 on the rear of my GT3 with PFC08 front and 01 rear and still felt like the rear wasn’t doing enough. I would do it if you are up for rear rotors. Calipers look great, what parts did you do the rebuild with?
#10
Pro
Thread Starter
I used RacingBrake pistons with StopTech high temp silicone dust boots and seals from Ohio Performance Solutions.
I will be due for rotors when I switch from PFC08s to Ferodo DS1.11s. .
Any preferences on which caliper spacer to go with? Probably doesn't matter too much.
I will be due for rotors when I switch from PFC08s to Ferodo DS1.11s. .
Any preferences on which caliper spacer to go with? Probably doesn't matter too much.
#11
#12
Three Wheelin'
Probably studs (if not a good time to go to same), so build your own.
Set it all up with washers to get exact dimensions then go to a machine shop for the spacers, and extras, etc. (I think my built spacer length was 11mm from long term memory FWTW....).
I use the usual PFCs in the front and Pagid Blacks rear to balance: More bite back there definitely helps....
GL!
#13
RL Community Team
Rennlist Member
Rennlist Member
#14
I used the caliper spacer kit from Agency Power when I upgraded to 350mm rears using the EBWerks kit (and PFC pads)
https://www.agency-power.com/shop/pl...v=7516fd43adaa
https://www.agency-power.com/shop/pl...v=7516fd43adaa