I'm looking to pick up a .2 turbo or turbo s and tune it, but I can't find a definitive answer as to whether there is a power difference once tuned.

 

I'd say yes, there's a difference. I have a lightly modded 2011 TTS and it responded very well to all the mods I have done. It has a Europipe, AMS I/C's, and a tune. It makes 546awhp and 636 awtq. I think anything you do to a Turbo, a Turbo S will respond more favorably in my opinion.

 

They are more or less the same no difference between the turbo and turbo S once modded

 

Except for the forged motor the "S" has...

 

Two different tuners told me it's software tuning that gives the S the additional 30 horsepower. Once tuned, that factory tune is overridden and both cars end up with the same power.
Also backing this is, aftermarket parts and tunes are the same for both cars. There's no specific tune for the S and a different one for the turbo.

This came from two different respected tuners here.

As for the forged internals, that isn't true either. If you look at the parts diagram, they share the same internals and part numbers. I think only one part was different and that wasn't associated with block internals.

 

^^ This. My understanding also....The engines are exactly the same - 3.8 Liter. The S has an enhanced valve control system and a tune basically. So to be clear, it would appear that a tune could overcome any performance gaps pretty easily. Block - internal rods, pistons, etc. all the same.

Right from the Porsche Archives...

" As a result, the 3.8-litre flat-six
engine now comes in two power
levels.
The 911 Turbo models generate
368 kW (500 hp) between
6,000 rpm and 6,500 rpm
and 650 Nm of torque between
1,950 rpm and 5,000 rpm
(700 Nm for a temporary period
with the ‘overboost’ of the optional
Sport Chrono Package Turbo with
dynamic engine mount system).

In the 911 Turbo S models, a
modified valve control system
and an adaptation of the engine
management, combined with an
increase in maximum boost pressure
by around 0.2 bar, enable
the power unit to produce 390 kW
(530 hp) between 6,250 rpm
and 6,750 rpm and generate a
permanently high torque of
700 Nm between 2,100 rpm and
4,250 rpm to deliver even more
power to the road. "

DC

 

I am no expert but find one. I was told that the .2 actually is a difference between the TT and TTS. Unlike the .1 in which all parts were the exact same and the tune was the only difference I do not think that is the case in .2.

 

For clarity...the 997.1 TT did not come in an "S" model, so they were all the same motor as there was only one model (Excluding GT2) and no "S" variant. The 996 TT had an S variant, and the 997.2 had an S variant, but not the 997.1 TT.

DC

 

Like DC said, That's because the .1 turbo were indeed all the same. There was no S model.
The differences between the .2 turbo and .2 turbo S is pointed out above straight from Porsche. Same internals, just a different tune.

FWIW: I verified this morning with Cobb that the .2 turbo and turbo S end up with the same power when they're tuned.

 

Kinda hurts knowing Porsche is charging so much for a tune. Hmmmm. Not cool. Thankful for this thread though and glad I know the truth.

Is it the same story with the 991, is the 991 Turbo S just a tune?

 

It's not just the tune. The "Turbo S" comes standard with several features that are optional on a "Turbo", such as: PCCB, sport chrono, centerlocks, etc. If you option a "Turbo" to include all the standard features of the "Turbo S", the price differential shrinks considerably.

 

Provided these links are true, here's another tidbit a lot of people don't realize....

997.2 Turbo S's are more common than standard 997.2 Turbos in North America (possibly the world too). 2,333 Turbo S's to 1,488 Turbos (N. America, 997.2).

http://pcnalocator.com/production-997-2-turbo/

http://pcnalocator.com/production-997-2-turbo-s/

 

Nice to know my Turbo is more rare than Turbo S


LoooL

 

Less than 500 manual .2TT's total... I love seeing that number. Think it's true?

 

Hey D! Hope all is well! There is a myth out there about the cyl head heaving some different things about it but not sure. For example on the 991TT parts in the PDK use different bolts but the parts are the same. Porsche mysteries. I can tell you we get the 997.2 TT and 991 TT to the same point as the S. Or 1/2 mile record 991 and the first in the 9's in the US was a non S! Your limit will be fuel and PDK.

DC made a good post on the difference in the heads leading to valve springs or something in there together with tuning and ore boost but they safely get to the same place.