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Old 11-30-2020, 03:31 PM   #31 (permalink)
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Quote:
Originally Posted by eagle View Post
I thought I shouldnt open a new thread that is why I am resurrecting this one

I/C Water Spray Test on Subaru GRB

0:55 onwards

subaru OEM intake scoop seems to reverse its flow (!) to the outside

wasnt subaru aware of that? how can that be?
Interesting!

I don't have an answer to your question but I've measured underhood intercoolers that either have no airflow through them (Peugeot 405 diesel) or reverse airflow (my initial underhood intercooler installation on a Nissan Maxima V6 turbo). The other day I was looking at a current turbo Mazda that has an underhood intercooler and no outside ducting to it at all!

Remember that in most road car applications, the intercooler acts as a heatsink basically as much as it does as a heat exchanger - and as a heatsink, it can transfer air back to the intake air when off boost.

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Old 11-30-2020, 03:34 PM   #32 (permalink)
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Incidentally, for those looking through this resurrected thread, there's a fair amount of misleading information in earlier posts.
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Old 11-30-2020, 05:47 PM   #33 (permalink)
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little jona - '91 Dodge D 250 first gen cummins LE
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Quote:
Originally Posted by eagle View Post
I thought I shouldnt open a new thread that is why I am resurrecting this one

I/C Water Spray Test on Subaru GRB

0:55 onwards

subaru OEM intake scoop seems to reverse its flow (!) to the outside

wasnt subaru aware of that? how can that be?
Yes they were aware of the interactions of the hoodscoop. On my 06 Forester XT they refuse to install a bug deflector Stone catcher citing that this device changes the Dynamics of the flow over the hood creating too many factory warranty claims from Turbo's overheating and failing due to this disturbance caused by the $250 factory option now(07) only available for naturally aspirated models.

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1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 31.32mpg 100mi 3.193 USG 5/2/20


Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg


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