LAT

Jean; how about a set of larger tanks with the same thickness in core thus allowing more surface area and the same heat dissipation. As in the RS IC in my car.

Jussi; My RS tanks are 15.5" deep and 2.38" thick, I could ask RS the source and then your home made IC could maximize the surface area in the engine bay with what ever is determined to be the best core material available, what do you think?

TB993tt

LAT your cores are OEM Porsche Motorsport, not RS Tuning I am pretty sure they are from the same supplier as the stock cores, they are just bigger.

Jean

I know for a fact that the Secan intercoolers have very sophisticated internal flow dynamics and structure, and that the alloys used are also the result of very expensive R&D financed by the aeornautic industry. The right sizing choice etc.. are simply complementing the whole, and are restricted by the sort of car they will be fitted on (street or race) and the usage.. An intercooler fitting a pressure sensing setup like the GT2 EVO 3.8 race cars, can be, and is larger and occupies the whole engine bay almost. The racing intercoolers are thinner and wider than the street versions that I am seeing here I think.

LAT, your IC could be either a BEHR or the excellent Heggemann, like the cores that were used on the GT2 EVO 3.6 version.

sfl993t4

Hello LAT

Do you have any pics of your cooler installed in your car with and without the shroud? My guess is that TB is right about the core supplier.

regards
Steve

sfl993t4

Sorry Jean, I must have posted at the same time as you so didn't see your reply. Jean possibly has more info than me on the stock core suppliers.
Steve

LAT

There is no shroud as the intercooler fills the spoiler up to the grille.
Here are pictures of the IC off the car.

Jussi

Thanks LAT from information.
That IC is huge !

Do you have pictures where that is installed to your car?

Have you tested it anyhow, like temp rises when making WOT?

It seems like stock but it has been extended from another stock IC.. hmm.. does anyone have useless stock IC to sell

Jussi

I think that this is always good/right way to do it, even for stock usage.
Cooling area is important and too much thickness is bad for heat dissipation

Stock thickness is 2.5 inch, GT2 is 2.5, Secan is 2.75. That's way the thick (3.5-4 inch) ICs from FVD/Cargraphic etc sucks..

NineMeister

I thought that things were going too well to last....

The truth of the matter is that Secan only learned how to make high efficiency radiator cores when they worked on a joint military project with Marston some years ago. Strangely enough they seemed to "benefit" more than Marston from the enforced technology exchange that was a condition of the project. Interestingly up to a couple of years ago Secan also supplied most of the F1 grid with radiator cores, now I am led to believe that they only supply one team, so read into that what you will. I am also told that they do not use special alloys for their cores.

I'm definitely not saying that Secan cores are not good as results have more than proven their worth, but the fact is that their performance could be matched by an equivalent Marston core once we select the ideal fin density, tube depth and size of unit for the application - all that the above superbly collected and presented data really shows is that the prototype intercooler made gains and that there is room for improvement. If RS Tuning made 6 intercoolers and scrapped the lot as none of them worked, I think we did ok for a first effort and I am looking forward to making further improvements before we put it into production.

Incidentally, we have already made a similar intercooler for a 965 Turbo 2 which is being tested for us in Italy and we have an idea to investigate options for the 996 turbo. At the moment we will only supply finished intercoolers so that we can maintain quality throughout the process and I can confirm that the target price for the production unit will be less than £5000 (+VAT, on an exchange basis).

My sincere thanks go to everyone involved in the testing and analysis of the data.

sfl993t4

Very interesting pictures LAT, thanks for those. If the intercooler fills the spoiler up to the grille, is the intake air taken from below the intercooler?
Pics of the intercooler installed (and of the engine bay before it is installed), would also be interesting.

Steve

LAT

More pictures as requested, maybe too many, if so sorry for taking up too much bandwith.

As to intake there is an area on the rhs of the IC that the snorkel would normally go in where the air has access to the intake. Due to the large IC there is no shroud or room for a snorkel intake.

TB993tt

It was always going to come down to price v performance 'tho' wasn't it ?

We were discussing this at length on the test day when we first saw the peak IAT data - "what would you pay for this if the Secan is ~£8000+VAT" ?

It was a hard one but I realise that the Marston cores aren't cheap, they look expensive but I suspect the £5000+VAT price may be too steep for a lot of people who would rather buy $2000 worth of shiny junk just so they can add "special high efficiency intercoolers" to their list of mods (not aimed at 993tt owners)

NineMeister

To further aid development it would be useful to know the pre-intercooler air temperatures that the high hp cars are developing as this will give us the best measure of how much heat the intercoolers are taking out of the intake air under full load. Does anyone run pre- and post-intercooler temp sensors on a datalogger?

Geoffrey

I do.

LA964RS

LAT...what are the 3 hoses for above the intake?...looks like they connect to the i/c?