cooperyau

Does anyone know the sizes of the 991 Carrera S? I heard it is 82mm and should fit our GT4 with some slight modifications.

Yargk

This has been discussed before a few times and I think that yes, the TB fits, but I'm not sure if people are rigging up the stock 991 S plenum or not. I've read both that the TB makes power on its own, and that it doesn't, but it makes power as part of a larger performance package including the rest of the X51 kit. Hopefully others will fill in the details.

Because adding the TB and Plenum would be such an easy upgrade for those hesitant to modify at all, I think it would be great if someone would dyno before and after with ONLY these modifications, with and without ECU tuning.

d00d

Looks like the PCV tube will end up on the other side where the TB attaches, so would have to extend the existing hose, unless doing a VTA modification;
http://nemiga.com/cat_spares/pet/por...1-1/38/107100/
http://nemiga.com/cat_spares/pet/por...4/545u/107100/

IPD sells an 82mm plenum for the GT4 that has additional benefits of boundary layer control and smoothing the airflow.

jmartpr

+1 on This...I asked BGB a long time about just doing the TB alone as it looks more factory to anyone looking at the engine bay. You have to play with some of the lines. The IPD plenum solves this problem.


I'm really looking forward to seeing results from the 991 GT3 plenum/TB kit from TPC.......that could be really interesting.

Warwick Morris

I had the GT3 TB and IPD fitted a week ago but won't be testing at the track till early Feb and will be looking for higher speed on the main straight. My garage has done quite a few of these (the mod is relatively inexpensive and a simple job) and said they have to re-set some ranges in the computer as it will otherwise throw faults due to the increased airflow and need for more fuel. Anyway no faults or CEL with the 20 kms I've driven in it and all very civilised. I'm not doing any other mods till I thoroughly track test the results and see how the competition is going. Only other mod has been RSS toe links so a track-focussed set-up.

d00d

I have the IPD plenum with 82mm TB too, the CEL came and went.
Yeah, the GT3 Plenum I've heard is coming will be interesting, usually long runners give better low end torque.

cooperyau

hope TPC launches their GT3 intake manifold package with proven results soon so I can make a decision. ;-)

Yargk

I'm also interested in the GT3 plenum and I'm not sure the IPD isn't worse than the stock Carrera S plenum.

TPC Racing

Mike has been putting in a lot of hours in on the CNC work and flowbenching the last few weeks. We'll be sure to keep you guys updated on the progress! Thanks for your patience!

~Jordan

jmartpr

Thanks for the update Jordan....anything you could share with us, sneak preview?

cooperyau

Any new updates on this from TPC. It's been awhile

Reborn996

Also looking for an update from TPC on the GT3 intake... been holding off on the Cobb tune so I could do both togther.