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YermanCars YermanCars is offline
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Join Date: Jul 2002
Location: IL
Posts: 2,346
Quote:
Originally posted by Jim2
930gt, here are a couple observations which may be of help.

Did you have your engine lid shut during your dyno runs? Otherwise there would be no air drawn through the core and heat soak would set in pretty quick.

My temp tests displayed that turbo discharge temps in the range of 600cfm at 1 bar (~400 hp) were 350 F with K27 or better. This means your intercooler is likely knocking off 150 F.

I shrouded my wing leaving a 6" opening on the right side of the louvers
which resulted in a 200F I/C discharge temp using an Andial half bay core, running one bar. (note that this is about 75F better than a stock core under the same conditions)

If you look at some pictures of Craig's car you will see his shrouding on the underside of his wing which causes the engine cooling fan to draw mostly through the intercooler core. With his half bay RUF he was reporting ambient plus ~10F wide open.

So, perhaps some shrouding is needed if you don't have any, though I agree that if your end tanks are so restrictive perhaps this is making the turbo work overtime in a low efficiency area of the compressor map.
When my brother dynoed my car he did it with the lid down(idiot)
and my intercooler was heat soaked badly and we still managed to put down 489rwhp @16psi. This was w/ the stock ecu and a modified proto chip.

http://media.ams-evo8.com/videos/amsmisc/PorscheDynoRun.wmv

Also, was your intercooler core a side to side or top to bottom? For low boost I would go to a top to bottom. For high hp, side to side.

Also, I have my rear engine tin removed. my car runs cooler and my intercooler is cooler.

End design is important, but it's your core that cools the air going through it. Did you see if the is anything blocking the core?
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Old 06-07-2007, 08:41 AM
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