Your understanding of thermal dynamics is entertaining and your explanation clouds the process of reality. Most everything you have said in this thread, starting with Adam’s old car (997.2TTS) not hitting 9’s in the 1/4 has been wrong... Based on the subject of this thread, the OP asks for recommendations for a 997.2 car. Your points (assuming any of them are true and accurate about your 997.1) mean little.

Saying that a bigger ic is better isn’t always true. A bigger core has the problem of absorbing heat. The biggest issue I’ve heard about with the larger cores (even from the reputable brands) is they act like heat sinks.

I also liked how you said the 997.2 ic’s are light weight and because of that, cool down faster. So according to your theory, any ic with *heavier* aluminum endtanks won’t cool down as fast as one with plastic end tanks? (since aluminum is heavier than plastic) You really dont have the slightest clue of how this process works...

The efficiency of an ic is a function of how much air flow is coming through the front of the core. Having a larger surface area can be a good thing but there are other, more important factors. Like pressure drop, which is based on internal air flow and velocity. Things like rough surface area and sharp bends add to pressure drop. And to clarify, we are talking flow from boost pressure from your turbos. If your turbos are pushing 30 psi and your boost gauge reads 27 psi, that represents a 3 psi pressure drop. So when you reference a car hitting 1000 hp with upgraded turbos that means nothing about how good the ic’s are. Those car could have a 15 psi drop in pressure and amazing turbos...

Since you would like me to continue. I’m sure the rough end tanks and the poor fitting cores mean they are efficient and have low pressure drops? Imagine how rough the internal design is when the exterior looks like that? And the worm clamps, zip ties and flimsy rubber hoses.

I never said one couldn’t make power with these ic’s. In fact, I said they are a good product for those on a budget. But if you want to maximize efficiency/power they are not the best option.

I apologize if that was offensive to you. My point was that they make products for several manufacturers (Volvo and Saab were two I mentioned) and for non race/general applications. Being a small company does not matter, nor being Swedish. (I listed those two characteristics as a matter of fact) But warranty, distribution and customer service pose a potential problem based on ones location. Not to mention Porsche specific knowledge.

Finally, someone with a 997.2 speaks out about his experience with Do88... It’s clear you’re happy with your choice. It sounds like tight welds, polishing, T bolt clamps and thick rubber rubber hoses are less important to you. You didn’t mention the gap between the fins and end tanks I highlighted previously? Are you happy with that too? You must admit these items show a level of lower quality while other options don’t cut those corners.

Regardless of the other modifications, it sounds like the do88’s have improved the overall performance of your car. It seems I can not say this enough in this thread. The Do88 kit is the best bang for the buck...

I got these 997.2 IC’s in Germany with custom clamps. According to the knowledgeable guys on the german forums these won’t leak up to 2 bar.

[img]https://imageshack.com/a/img922/1804/TJDWAQ.png[/img]

I’m glad you took my points in the manner they were intended. This is a forum where all issues should be discussed. Obviously we all will have our own opinions...

It’s good to know about your experience with their distribution and customer service. With regard to Porsche knowledge/experience. That was mainly directed to fitment and quality. Most Porsche owners are a little ocd. At least compared to the last platform I was on. (BMW)

I don’t know what kind of clips they are. I’m running a mild tune from Kevin, so I would also be OK without the clips.
You can do a search on the german pff.de forum. I got them from user “Ollisal”, nice guy.