Just got this fresh untouched 996 Turbo X50 in from a used car dealer to perform a basic Stage II setup. This has a color (sorry iphone pics) that i have never seen before. It is kinda like a obisidian blue. Its almost blue grayish. Anyways the car has the big ceramic 350mm brakes, full carbon interior, and is in great condition.

So what are we gonna do... We are going to add what would be considered a Stage II for the newbies. This is a ECU Flash, Full Exhaust, Diverters, and new plugs. The X50 comes with the larger K24 turbos and GT2 intercoolers. Again for the newbs, most 996TT's come with the K16's which are smaller producing less boost stock and power then the X50 model. The same mods can be applied to the X50, but the gains are not as great as you see on the K16 car. Usually, this stage 2 will net about 110 awhp on our Mustang Dyno running 91 octane. A X50 is already running 1.0bar of boost about. However you are flowing more air through the larger turbo so 1.0bar on K24 still makes more then 1.0bar on K16's... Now that the regulars are bored, to the mods.

First step is our VR Tuned ECU Flash. As you all know, this is done via the OBDII port as seen here - www.vrtuned.com/installation. We have read out the car and tomorrow will do a baseline and then load the tuned file sent back to us.

Before we redyno, we will install the Denso IK22 iridium spark plugs. Why these? We have chosen these as our plug of choice using them on 100's of cars including our own. The 1 step colder works well on increased boost cars without causing misfire that usually happens on old stock heat range plugs.

After the plugs comes the exhaust system. This will feature our Agency Power exhaust and headers. The exhaust is all 304 stainless steel, polished, and has integrated quad tips. This exhaust has been a favorite amongst more conservative drivers as it is mellow in sound when cruising but when you put the throttle into it, it rips. The headers are also 304 stainless with thick flanges for a secure fit. The headers we have tested previously to see a decent gain in the low to mid end with minimal sound change.

With the exhaust, more air flow is needed. For simplicity and pricing restraints, we will add the very effective and affordable ($76) K&N drop in filter. The turbo car must breathe better. While the stock airbox is out, we will also add in the necessary with all 996TT upgraded Diverter Valves. Again for you newbs, the factor Bosch valve has a diaphram system that leaks boost on the upper end of the RPM robbing you of power. Our Agency Power Valves, available in black or polished, use a piston and spring design. To make the install easier, we always include a silicone F-Hose.

Now, do you need to retune it for these mods, NO. Softronic's ability to tune allows the car to "learn" or adjust to these basic bolt on's. The only difference in tuning would be for 93oct pump fuel or if the customer decided to add bigger turbos or change the fuel components.

Once all of these mods are complete, we will then dyno the car to show the delta gain from these Stage II parts. So stay tuned for more pics and info

 

Tuned and Original files received from Softronic. Expect some updates soon

 

This car with 91octane baselined at 411awhp??? BONE stock TurboS. A stock 996TT with K16 usually does 340awhp. Interesting.

 

Wow looks like a nice strong car...I love the color combo, never seen that outside color either....is that a 2005 turbo S or 02 - 04 X50? although they have the same exact engine the 05 turbo S may have come with a factory engine map generating slightly higher numbers than the '02 - '04 X50, which *could* explain the baseline dyno results. Once the new tune is applied the very slight power difference between the stock X50 and the stock turbo S will be negated since the engines are identical.

 

it is a 2005 turbo s.

 

K16 cars run .7 bar, X50 runs .8 What kind of boost was this car running stock?

Dan, while you're at it, this is a great opportunity to verify whether the later turbos S cars have different gearing (like the 997T)

The only concern may be that if in fact the TurboS cars did come with a different, more aggressive map that we will see less gain than a "normal" K24 car? (while seeing the same overall performance)

 

I love the technosport wheels!

 

We're waiting... (can't wait to see the post-dyno numbers).

Gotta love these forums for the vast array of information. In due time, I'll take what I've learned any buy my 99xTT :P

 

Agency Power headers, exhaust, and plugs have been installed. Got to do the DV's and then will have a dyno session later.

 

Dan, nice simple thread... no harm in repeating stuff for newbies !

I would say tho that 411atw sounds way too high compared to the numbers I always reference from a dyno-dynamics dyno....for instance my stock X50 did 380atwhp which the d-d dyno translated to 475hp fly.

In any event, lets put it down to differences in the dyno, no big deal, they vary widely, but what would be a more interesting & valid comparison for the power gains would be if you could record some 60-130s (on pump) once your stage 2 tune is done.

Did you manage to record any 60-130s whilst it was stock for comparison ?

thx

 

Yes this car baseline was much higher. Unlike the other X50's I have done at around 380awhp, this Turbo S 2005 must be a brute. The baseline was actually 410ish. Just finished dynoing the car. Video and dyno sheet to come. You will be impressed!

 

Dan, did you say your X50 was doing 1.0 bar stock when you bought it ?

If so, would prob indicate its aleady got a map.... stock X50 is 0.8bar peak 0.9bar... no more.

 

I dont own a X50. The customers car was making .8bar before the flash. The custom tune by Softronic was set to run higher boost then a normal X50 flash as well. I appreciate your input though.

 

Sorry, I somehow read the thread as Vivid had just bought the car !!... but makes more sense if its a customers yes.

OK, so I'm still baffled at how K24's at 0.8bar can make 411atw.... thats aound 510hp fly for a 450hp rated engine.

In any event, as we know, its the gains that are important.

 

Agreed, I have many stock X50 dynos done on our Porsche customer car gallery, so its odd, but dyno settings have not changed at all - www.vividracing.com/forums/gallery