Yes unless I am mistaken, what you are showing is 2 cars, run at 2 different times. Since the difference is not just big, but MONUMENTAL, the test begs for more stringent criteria.
I think it would be a lot more convincing to have the test done in the same car, before and after intercooler change, with the 2 parameters followed:
1. Data logging of IAT
2. 60-130 times, or whatever time deems necessary

1 would show that yes the intercooler did lower the temp that significantly.
2 would show that the better thermal efficiency did not come at a cost, such as pressure efficiency.

Once again, great thread, great work.

 

No...you misunderstood me...All the tests were made to my car...So there is only one car...Kostas was codriver holding the laptop...One is with 997,1TT ICs and the other is with 997,2TTICs...Also as i stated before the run logger is the forth in a row with the 997,2TT ICs...all of them had same iat...very solid and constant values...I can show you 2nd and 3rd run with 997,1TT OEM ics to see that max IAT was 65 in first run and 70 at second...

 

Wow -- then very impressive indeed. Thanks for the correction. I am still shaking my head in disbelief. I could understand a few degrees -- but 18-20 centigrade difference? That's MONUMENTAL.

Are we missing something here or is it for real? If it is --- AMAZING! Any pro would like to chime in please? Particularly vendors who are making and selling intercoolers? How could there be such a huge difference, just one generation apart?

It will be very interesting to see how VBox times compare. Thanks again for taking the time to test and post.

 

That's something you're not going to see...emperor's clothes etc.

R&D, even car factories do that. The most amazing part with these IC's is that they cost just about $900 / pair.

 

That's what did I mean saying "consistent", sorry for the poor US language

 

That's what did I mean saying "consistent", sorry for the poor US language

 

Ok, mine 997.2 Ic's are ordered, perhap's not the "Best" but sure better than stock...
My VTG's are bigger than stock, producing a bit less IAT than small, so those parts might work correctly with...
If possible with my tuner we will data before and after the mounting with the same ECU, and after a map optimisation.

 

Skandalis, you don't have to tell me which brand, but did I understand correctly that you've compared IAT's of 4 different intercoolers: stock 997.1, stock 997.2, and two after-market units, and the 2 after-market units actually did worse than the 2 stock units?

1. Was the methodology of comparison similar between the 4 intercoolers?
2. Were the results "repeatable"? (Done multiple times and same result every time?)
3. Why not posting the results of the 2 after-market units? As long as you don't name names and have good intention, I don't see why not? It's fun, educational, and allow others to evaluate your test results critically (to be fair to the after-market vendors).

Thanks.

 

Is GT2 RS's IC same as 997,2 ?

Thanks!

 

^ Yes

 

Ok. That makes sense. But whats the story with your tires? Have you tried tire rack. They can surely get you the right tires fast and probably way cheeper than where you are. Hows the benefits of the new ics shown up in the 130 to 200 time? Did the others make the car slower?

 

Yes! Repeatability/reproducibility :-) is important. For example, how about studying the IAT not with a 60-130 run, but just cruising around at 70. Is there a difference there? Next example, could there be something in Skandalis's particular car/methodology/measurement/etc. that causes such a significant difference?

There must be several people on this forum who have used those other after-market intercoolers. Has no one done a comparison of IAT before and after change?!

The 20 centigrade difference between one generation to the next of intercooler keeps forcing me to ask: What are we missing in this study? I have my doubt, but the strange silence by after-cooler vendor is making me think, maybe Skandalis and earl have really discovered something BIG after all :-).

 

If you're just cruising at any speed, there is not load on the engine, no boost to increase temps. To test an IC, you have to subject it to engine load, no?

 

i was talking with earl as hes done more research into this then i have but it seems were seeing the difference in Intercoolers that are track oreientated for extended use versus intercoolers that flow wonderfully for big hp numbers and are great until they are heat soaked.

 

id be interested in some data taken from a car on the track for a long period to make sure the coolers were heat soaked and see how they react