My understanding is that the ECU uses LOAD tables which is a function of MAF and IAT but someone can correct me I'm wrong.

Looking from my last run, i think i was correct regarding the overboost feuture in low in gear acceleration.
you can see in the datalogs i have attached that there is an increase of boost where i highlighted in green , then it goes down a little then it increases on the top end.
and what George mentioned regarding timing and lambadas in midrange sheded more light on whats going on.. timing suddenly is decreased in midrange where i marked in red while the overboost is active , then in green at around 5318rpm timing increases and lambada's begin to settle..
in 4th gear lambadas settle down to a more even pace..
That expansion intake manifold is interesting isnt it ??

Yes, it is very interesting althought I have to admit I do not know anything about expansion manifold. My concern focuses on when you are under high load (unfortunately George's data does not indicate load) and that your timing goes down, fuel increases, and boost decreases. That's indicative of some knocking rather than designed programming but I could be completely wrong. If you used some better fuel, I bet you won't see this. Just my opinion.

yes just looked at Ruf's data I would also say it is knock.. What are the specs of the engine?

i had the pleasure of a ride with skandalis the evening before your run - he said you were coming!

It is dissapointing for me to report that I thought my car was slow after a ride in Skandalis car... Which means that I will not be taking a ride in yours George! Or it will cost me money! You are welcome to go for a spin in mine when you are back in town!! Nice work both of you.

This thread is really an eye opener.

with pleasure.
In athens there are plenty of faster ones though. This one corners as well!

The car is really tailored to turn...However I cant tell about the driver...

you can you can, just take a look at those videos i gave you

Am not clear what you are saying GT-TT. Do you mean you felt no boost restrictions with the .2tt coolers yet saw the difference in IAT's, or, did you feel no difference from the IAT benefits?

And with the AM ics's you took off what were the negative differences exactly? I take they flowed alright but could not cool the air enough for your tune set up?

Its 600hp RS tuning GT2,

With GT2Rs intercoolers , And a decat exhaust

Fuel is 97 OCtane

speed 21, the .2RS coolers did not have a perceptible difference in flow. The dramatic difference in IATs (>20 degrees cooler) were responsible for the improvement in the 200-300 time that dropped from 13.1sec to 11.8sec which is pretty significant.
The other AM ICs i tried few months ago had so much backpressure that i did not even bother logging IATs as I am already running at the limit of the mafs and vtgs anyway so I would not be able to adjust for the pressure drop. Car felt immediately lazy, as if i had dialled down the boost by 0.1 or 0.2 bar.
In the little i saw in the durametric they were cooling better than my other AM ones but they would not work with my tune with those "small" VTGs.
Hope this is clear?

I see. Try better fuel, such as 100-102 octane and log in the results after a few runs. If ignition timing changes significantly it means the car is knocking. I had this issue for over a year and i could not fix it which prompted me to open engine and improve cylinder heads, cams etc. Then it improved a lot in the mid range.
My car is a tt but essentially the engine is GT2 as i have the expansion manifold, the GT2 vtgs and also the software was based on a GT2 factory "press car " translated for the tt ecu.
I think you need to send those logs to RS and ask them to fix the issue. Detonation on those GT1 engines can be a b..tch to fix.
Try to exclude though all other possible explanations (sensors, plugs, leaks etc)

Thanks for explanation GT-TT. Am clear now .

It's interesting that with all your mods you had no flow issues with the .2tt coolers. As you may know the .2tt coolers were quoted by CMS as being of less flow than the .1tt coolers so this sort of confirms to me the flow rates aren't stifling the performance of the car in any way.

What we provide here is real data based on IAt and timeslips of 100-300km...Maybe a lab report differs but real world results are what we care about...Also I havent find any lab report regarding IAT...

Nick,you are more than welcome to ride again in my car or in George's car...Your car is like new and I really enjoyed meeting a person who not just owns a 997TT but has knowledge about it...