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Old 03-15-2003, 09:28 PM   #1
Butt Dyno
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06 Evo #7 STU, 03 IS300

Default any dyno proven gains for STi hood scoop?

I have searched for sti hood scoop dyno air and various combinations and haven't found anything. I'm just curious if it will matter w/ the stock TMIC or if you have to have a bigger one in order to see any gains (or if there is no gain whatsoever other than more pebbles in the engine)

-bd
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Old 03-15-2003, 09:45 PM   #2
David@Vishnu
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Nope no ButtDyno gains to be had.
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Old 03-16-2003, 02:46 PM   #3
WRX1
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There really isn't going to be any hp gains by adding the hood scoop, but in normal driving it will keep your intercooler closer to ambient temps. I did some research last summer with STI scoops, and air diverters and water spray kits and such (I think the thread was Air intake temps in the FFI forum). There ended up being some good info in that thread (along with the useless rambling).

Russ
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Old 03-16-2003, 03:02 PM   #4
Butt Dyno
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Default

Quote:
Originally posted by WRX1
There really isn't going to be any hp gains by adding the hood scoop, but in normal driving it will keep your intercooler closer to ambient temps. I did some research last summer with STI scoops, and air diverters and water spray kits and such (I think the thread was Air intake temps in the FFI forum). There ended up being some good info in that thread (along with the useless rambling).
Found it - muchos gracias

http://forums.nasioc.com/forums/show...ghlight=intake

-bd
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Old 03-16-2003, 05:11 PM   #5
Jon [in CT]
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I doubt you'll find any description of "dyno proven" gains since most dyno measurements are conducted with the hood up.
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Old 03-16-2003, 05:23 PM   #6
supermarkus
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touche Jon.
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Old 03-17-2003, 12:06 AM   #7
Ken C
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Default thoughts

A few other things about the STi scoop to think about -

Over about 125 mph, the air wave on a car with a normal stance (no rake angle due to front lowering, yadda yadda) will begin to clear the standard scoop. The STi scoop helps there if you are driving your car on track (or in Montana )

Second, if you do get a scoop with a real STi splitter, you'll also notice a fitting for the water spray on the splitter. You can disconnect the washer hose from the passenger washer nozzle, and plug it into that nipple. Voila, instant water spray on track days - just wash the windshield.

The problem is that the STi splitter is made to match up to an uprated intercooler, and is too large to mate up to the standard without some creativity.


Ken
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Old 03-17-2003, 05:29 PM   #8
zacek
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Default Re: thoughts

Quote:
Originally posted by Ken C


The problem is that the STi splitter is made to match up to an uprated intercooler, and is too large to mate up to the standard without some creativity.
good point, this is indeed very important and often overlooked fact. Is is very important for the splitter's rubber duct to mate just right into the targeted intercooler, without bulging nor uncovered parts. If there is a big gap somewhere, a big part of the air being injected inot the scoop will just divert into that part instead of forcing itself thru the IC.
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Old 03-17-2003, 10:43 PM   #9
Ken C
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Exactly - that's the issue. Well said - the air will take the least resistance around the IC without being confined by the splitter well.

KC
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Old 03-17-2003, 11:46 PM   #10
Bolster
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I saw my oil temps drop slightly- which is probably a result of more air hitting the intercooler (lower air charge temps mean lower overall operating temps).
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