Good info I lifted from google:

Hi guys, I have tested a few intercoolers on the flow bench and in the race cars. What I noted.............

1. Bar and plate, for the same size, flows more air inside

2. Bar and plate, for the same size, flows less air outside (ie; bigger restriction on flow to the radiator)

3 At 100 kph, tube and fin cools better for the same size, because of 2.

4. It takes longer to heat soak a bar and plate, because they are heavier.

5. Tube and fin are lighter for the same size

So for a road/circuiit car I would use a tube and fin because points 2, 3 and 5 are import on the circuit. For a road/ drag car I would use bar and plate because points 1 and 4 are more important on the strip.

The killer is, I have found that the end tanks make more difference than whether choosing between bar and plate and tube and fin core.

Hope that helps

 

hi brnrdtns.... agreed on your points based on intended use. what did you mean by the end tanks. For 997-110-639-71 & 997-110-640-71 –Porsche I'm told the 996 hoses plug in. I will get new hoses with the updated clips. What did you mean about the end tanks ?

 

That is info from someone else. It is basically saying that if the end tanks are bad then it doesn't matter what kind of coolers you have. The RS coolers are good to 1.5 bar so I think you will be good.

 

@brnrdtns... got it ... good point you know i didnt think of 1.5 bar or more will be a"tank issue" on the RS coolers.. again I will never run this pressure on these coolers thx

 

They are good intercoolers for their intended purpouse.

 

Anyone have part numbers for the 997.2/GT2RS OEM intercoolers? And a preferred vender to buy from?

 

The Denso ones are DIT28015 and DIT28016. I bought mine from https://www.bestpartstore.co.uk/
Enter the part numbers and the options come up. The NRF's might be a bit cheaper. In any case, they all appear to be made in the same factory. My old intercoolers were NRF's.

Even though the company ships from Europe, they still arrive fairly quickly.

 

call sonnen porsche in ca. go to thier web site and plug in the numbers... good luck

old - to new numbers=> -997.110.639.70 Left Intercooler - 99711063970 <- 71 replaces 997-110-639-71 –OEM - sonnenporscheoemparts.com
old - to new numbers=> 997.110.640.70 Right Intercooler 99711064070 <- 71 replaces 997-110-640-71 –OEM - sonnenporscheoemparts.com

99711063970

99711064070

 

Just got mine from kuehler-rath. Ask Katrin and she will give you 10% off their stock price. Both RH/LH delivered from Germany in 3 days for $820 US. These were Jdeus from Portugal, and I noticed that is the same OEM mfg that the famous Earl who started this mod write-up used.

I totaled nearly 15 hours of work including extending the clamps to fit the new thickness (I work slow and carefully ). There were a few things I had to change, but it was otherwise straight forward.

Track day coming soon!!

 

Bar and plate are always better than tube/fin. The bar/plate acts as a better heat sink. I have Bell 4.5" cores w/ homemade end tanks. Never see elevated intake temps.

 

Not true. For road course usage the tube and fin flow more outside air through the cooling fins, thus they are able to dissapate more heat and are better for constant repeated use and are lighter in weight. The tradeoff is that they are more restrictive and do not pull as much heat out as the bar and plate does initially. The bar and plate have more mass and are able to pull more heat out of the boost as it is better heat sink than the tube and fin. The tradeoff is that they not as efficient at dissapating the heat because they flow less outside air through the fins, thus they will heat soak under constant road course usage. That doesn't go to say that both can't work well under all circumstances, but one is clearly better than the other under different circumstances. So for drag and highway pulls you want the high flow and high initial cooling of the bar and plate. For road course or hard canyon driving you would benefit more from a tune and fin.

 

DaveSen... Curious who/what is "kuehler-rath"... please provide the link... thx

 

http://www.kuehler-rath.com