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Old 09-04-2010, 10:11 AM   #1
wtyree
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Default What will happen if.....?

It's not specifically a built motor question, but I didn't know where else to post it and I thought I would get better answers in this group. I have a 2002 wrx wagon with cobb stage 2 mods (tmic). Would removing the weather stripping that runs along near the firewall that seals to the hood increase air flow through the engine bay at highway speeds?
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Old 09-04-2010, 10:31 AM   #2
silvertoungerex
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No. Air goes into the engine bay and then goes under the car. I don't want to be that guy who beats you down with a question like this but where did you get the idea?

That just happened.
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Old 09-04-2010, 02:09 PM   #3
MartinSTi05
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Actually that is a good idea and has been employed by some of the top road racing subarus around.
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Old 09-04-2010, 02:29 PM   #4
wtyree
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Thanks for the replies. The original thought behind the question was how to inexpensively get more airflow through the engine bay to help with cooling air through the radiator and to lower the air pressure under the hood to help with the front end getting light at highway speeds. I have tracked the car a couple of times and autocross frequently. What I wasn't sure of was, whether or not it would actually suck air in at the base of the windshield or exhaust air from the engine bay.
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Old 09-04-2010, 09:22 PM   #5
jaxscuby
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reverse hood scoop works better than removing the weather strip.
but that would require a fmic or awic.
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Old 09-04-2010, 11:19 PM   #6
wtyree
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I might try taping yarn to the hood and base of windshield and see what it looks like with and without the weather strip.
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Old 09-05-2010, 01:31 AM   #7
Baay
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a better idea is get some water soluble paint, put a few puddles and do a run or two, then see how the paint is pushed around by the air. Easy enough to wash off after that, and you dont have to keep looking at how its working while driving.

puddles is a bad term, maybe think of it like blobs, you want enough that it will move, but not enough to spray all over the place
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Old 09-13-2010, 12:47 PM   #8
wtyree
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Well, I was lazy and didn't do the yarn or the paint. I pm'd mick_the_ginge because I saw on one of his pictures that he had removed his. I think it helps with air flow because the water temp stayed just above 160 degrees while I was on highway and oil temp was around 180. Usually the water is above 170 and oil is above 180. Not hot, but I'm just experimenting right now.
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Old 09-13-2010, 03:22 PM   #9
blowbyu24
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i was told that removing the weather stripping is one part the other part would be to add a washer to your hood (where it attaches on either side) and let it sit a quarter of an inch higher allowing more air to escape
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Old 09-13-2010, 04:00 PM   #10
wtyree
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I'll look at that also. I did notice that the hood does wiggle more now. I'll have to look at adjusting the stops and the latch to see if that helps the movement.
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