We normally have a constant stock of 65mm and 68mm Billet VTG turbos for the 997TT in order to reduce wait times for our customers. Well now GT2 owners can also take advantage of our "no-wait" turbo upgrades, since we're now stocking our 68mm GT2 Billet VTG upgrade as well!

So, on to the fun stuff. After spending a few weeks in his 997.1 Turbo Cab equipped with our full 68mm VTG turbo package, a customer of ours decided it was time to bring in his GT2 for some upgrades. Well....a few upgrades quickly turned into a full build! You can't have a tiptronic turbo cab that's faster then your GT2, right?? Everyone should have 2 700 whp 997's.

So here she is after arrival yesterday. The build will include our 68mm Billet VTG Turbo's, Champion exhaust manifolds, intercoolers, carbon y-pipe, GIAC programming, Tubi race exhaust, etc etc. Based on our last GT2 upgrade which used our 65mm Billet turbos (which made 688whp), we're expecting somewhere north of 700whp for this one.

Stay tuned, I'll update this post regularly with pictures, info, and dyno sheets as soon as I have them.

And for any additional info check "The Werkshop" Our Blog.

The Werkshop









YouTube - Porsche GT2 Champion Motorsport 68mm Billet Turbocharger Build | Baseline Dyno Numbers

And......about an hour and a half later, engine's out.

Now the real fun begins. Stock parts come off tomorrow morning to make room for all the new go-fast stuff.

 

:changing pants:

 

with the billet wheels at what rpm is full boost reached? interested to see the final numbers on this.

 

With the 68mm billet turbos, we're getting full boost (23psi) at 4k rpm's. Peak power comes on just a tad later, around 4700 rpm's, but full boost pressure is at 4k.

 

Here's another quick update guys.

Factory clutch and flywheel are out, and in goes the new Sachs setup.

Updates are also posted on our new Champion Motorsport blog....The Werkshop





Couple more updates:

68mm Billet Turbos are on and ready to go. In this pic you can really see one of the best things about our billet turbos. They re-use all the factory lines, so installation is a direct bolt-on.



Here's our beautiful carbon plenum with 82mm TB installed:



And here.....The piéce de resistance...

 

OK, engine's back in and hardware installation is complete. Now it's just time to flash our custom GIAC/CMS 68mm turbo software and see the results. Before we do that, we thought we'd make an interesting comparison between the stock GT2 dyno results and the big turbo package WITHOUT the upgraded software. As you can see, we picked up over 130 WHEEL horsepower from the hardware alone, without any programming! Tq drops off a little bit in the middle of the range due to the factory tq-limiter, but the new GIAC software will take care of that.

I can hardly wait to see what this baby puts down once the flash is installed....stay tuned!!



OK....so here's another update. It seems it's back to the drawing board for another clutch option for this build. Initially we thought the Sachs 764 would hold, but the power output of this car is pleasantly exceeding our expectations by a lot! As you can see from the graph below, the clutch gives out right around 5600 rpm's, which is at 640 lb/ft of tq. Interestingly, the Sachs 764 kit is rated at 650 lb/ft of tq as it's limit....so it's definitely not going to be enough for this package. You'll also notice a dip at around 3500rpm....that's not the clutch slipping, but at this point we'd already done a couple runs with the clutch slipping and were trying to feather the throttle and build tq a little slower in the run to see if it would still slip at the same point, which it did.

That being said....735 WHEEL HP with a slipping clutch is nothing to shake a stick at.

We've got some plans for another clutch option that will hold the power and keep drive ability. I'll get some more info on that as soon as I can.



So, sorry for the lack of updates today. I've been out of the office most of the day. Anyhow, yesterday before leaving for the day, we let the clutch cool down and went for one more glory run on the Sachs 764 since it's getting swapped out anyway. As you can see from the graph below, we managed to get one good pass without any slipping. On the second run, the clutch started slipping again.

I left the other two runs on the graph for comparison. The red lines are hp and tq without any clutch slipping. So....how does 752 WHEEL HP with VTG turbos sound?

 

Subscribed to see what this car does on race gas with a proper clutch! Great build.

 

Thats some serious power! Nice work!

 

Ummm. wow. I'm staggered by the 130whp from the hardware changes alone without tuning!

What are the plans for the clutch?

 

We've spec'ed out a custom clutch for the customer which should be ready in about 2 weeks. The alternative would be to go to a puck style clutch, but he wanted to really try to retain the smooth engagement and drivability of the stock clutch, so we're going to try something new.