when turbo goes into overboost gauge shows an up arrow and turns red

didnt know that but pretty cool

 

Yeah man, that's Sports Chrono extending its legs.

You should see 1.1, 1.2 spikes, mine fluctuates A LOT from 1.0, 0.9, 0.7, it's never constant at a number.

Was yours steady at 1? If that's the case that is awesome! As it is not adjusting and lowering boost.

 

seemed to run a flat one bar, but like my other turbos and your experience is it will fluctuate some

just broken in so will play with it some more and let ya know!!

gotta say alot more torque and acceleration than I thought!!

also as a turbo guy must admit, turbo kick in early and smooth, I dont really detect any lag?!

 

You really have to pay close attention to feel the lag, for the untrained butt there is none.

Great car, with great engineering.

Enjoy it in good health!

 

That is so cool

 

Tom,

You have a new 2013 Turbo S correct? If you get a chance would you mind taking a "leisurely drive" at some point and let me know if your boost drops below to 0.6bar or lower from 6000 to the 6600rpm redline in 3rd gear or higher? I am just trying to track down and verify if the actual cause of the boost drop off issue is just from bad BOV/diverter valves leaking or if the boost drop off is actually part of the stock ECU programming. Your car is new enough that there should not be a diverter valve issue yet, so if it too drops off I can then infer that it most likely it is also part of the ECU programming to drop boost off in the upper RPMs.

As an example of what I mean, if you check out this top speed run by Maroc on Youtube you will clearly see that boost pressure drops WAY down to 0.4bar (5.8psi) in the 6000-6600rpm range. This is a very clear indicator that his car does have the problem. Personally I am very impressed that the Panamera Turbo S is actually as fast as it is with this boost drop off problem. Maroc was still able to run 311km/hr or 194mph, and I bet it would easily clear 320km/hr or 200mph if his car was holding the minimum 0.85bar (12.3psi) of boost pressure properly on the top end of the rev range.

Stock minimum boost pressure on a normal Panamera Turbo is supposed to be 0.6bar or 8.7psi with a temporary jump to 0.84bar (12.1psi) during over boost. On a Turbo S stock minimum boost pressure is supposed to be 0.85bar (12.3psi) with over boost hitting a minimum of 0.93bar(13.5psi) or greater depending on fuel used (91/93 octane) and weather conditions.

In addition, during the process of upgrading my turbos it was discovered that the factory OEM wastegates really have some **** poor springs in them, as they open wide at only 5psi. Unfortunately there is no easy way to just replace the springs with stronger ones without making a custom bracket for the actuator. That said, we were able to increase the strength of the stock springs to 9psi by adding additional resistance with some turbo wastegate buckles, so hopefully that should help a bit there.

Thanks,

Jeff

 

I apologize, I forgot to actually post the link to the video of Maroc's top speed run, here it is:


Jeff

 

will try it!!

 

Pretty sweet, love these wheels

 

ok did several full pulls second and third gear, boost stays at .9 - 1.0

if that helps?!

 

Tom,

That helps a ton, appreciate you testing that on your new 2013. This confirms that the cause of the boost pressure drop off issue most likely all is a result of BOV/diverter leakage.

Thanks,

Jeff

 

well then car will be even faster!!

 

Most definitely it will be much faster! I you happen to "anonymously" make another top speed video and then post it I do not think anyone will mind!

Forgot to ask though, your car is still 100% stock right? No tune? The only reason I ask is I saw you mention that you were thinking about getting the IPD Plenum in another thread a few months ago.

Jeff

 

mine has the "S" tune factory then I put in a BMC airfilter, IPD plenuim, fabspeed 200 cell cats, X pipe resonator delete

If I was going to run any more boost would probably change out the diverter valves and may do the intake Y pipe but still
runs pretty good!

Next time I race at Daytona, will try to run a DE run group with the PTTS and see what I can get on a GoPro cam for you guys

I dont do the street stuff for obvious reasons....well not that I would record!!

 

Well that actually distorts the test results a bit, should have asked you that first, I thought you were bone stock just passing by your 2500 mile recommended vehicle break in period. The addition of the IPD plenum, the replacing the factory cats with 200 cell cats, and the resonator replacement with the X-pipe each will contribute to higher boost values and also help to hold more consistent boost across the rev range, especially on the top end. They are all great mods!

Daytona huh? Pretty sure that you will enjoy this video then. You should see if there any standing mile runs in your area.


Jeff