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Old 09-21-2020, 10:46 PM   #1
GL4202
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Default Raised hood, ventilation?

I just recently added spacers to the hinges for the hood to raise the back up about an inch, then I realized that the cabin air intake is right there under the windshield wipers. Im worried about funes or something going from the engine bay into the cabin. Is this safe? Will I be inhaling anything I shouldnt be? Or will it just be hot air?
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Old 09-22-2020, 04:00 AM   #2
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Default Re: Raised hood, ventilation?

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Originally Posted by GL4202 View Post
I just recently added spacers to the hinges for the hood to raise the back up about an inch, then I realized that the cabin air intake is right there under the windshield wipers. Im worried about funes or something going from the engine bay into the cabin. Is this safe? Will I be inhaling anything I shouldnt be? Or will it just be hot air?
That was popular in Japan a few years ago, I've read.

You may have cooling issues, since the base of the windshield is a high pressure zone, you'll likely force air into the engine bay making it harder for the air to come in through the radiator.
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Old 09-22-2020, 11:11 AM   #3
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Default Re: Raised hood, ventilation?

I gotta ask... what is the purpose of lifting the rear of the hood???
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Old 09-22-2020, 11:25 AM   #4
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Default Re: Raised hood, ventilation?

It's usually done to accommodate raising the engine (engine mount spacers) as part of lowering the car. If you don't raise then engine your axle life is compromised. When you raise the engine the hood touches so you lift the back to accomodate.
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Old 09-22-2020, 02:41 PM   #5
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Default Re: Raised hood, ventilation?

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It's usually done to accommodate raising the engine (engine mount spacers) as part of lowering the car. If you don't raise then engine your axle life is compromised. When you raise the engine the hood touches so you lift the back to accomodate.
I've never heard of that, it's always been guys trying to "let the hot air out", in my experience.
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Old 09-22-2020, 02:43 PM   #6
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Dazed Re: Raised hood, ventilation?

Jeez, I thought these cars *were* pretty low to the ground. IIRC, there's also some safety hooks on the back of the hood that are intended to add crumple energy to the hood in a front-end collision. But if you're a Safety Last guy, go for it!
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Old 09-22-2020, 05:14 PM   #7
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Default Re: Raised hood, ventilation?

The seat position is low to the ground. The car itself seems to have pretty decent ground clearance. Much better than my Ford Focus; it scrapes bottom on the road into our cabin where the SL2 does not.

I think the reasoning for lowering an S Series is to eliminate tire gap between the top of the tire and the body. I agree it does look better however I'm not willing to lose any ground clearance.
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Old 09-22-2020, 07:07 PM   #8
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Default Re: Raised hood, ventilation?

When testing the air conditioner pressure, you put the system on recirculate to avoid sucking hot engine air into the evaporator, since the hood is open. This can cause excessively high ac issues. You may have cooling issues if the rear hood gasket leaks.
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Old 09-22-2020, 08:43 PM   #9
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Default Re: Raised hood, ventilation?

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Originally Posted by 454cid View Post
I've never heard of that, it's always been guys trying to "let the hot air out", in my experience.
Yeah thats what I think it does, at idle it lets the hot air vent out, and im gonna put a diy mightycarmods splitter on it, so there will be a low pressure zone under the car, and high pressure zone at the back of the hood. Air will get pushed down under the car
Reversing it if the cabin air intake takes in bad air though. Not worth more lung damage lmao
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