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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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01-18-2022, 08:03 AM | #16 | |
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01-18-2022, 08:14 AM | #17 | |||
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I dont want to run bonnet louvres, and I have a large alloy sump guard fitted I simply can't get the air out of the engine bay. It's interesting when I have the car jacked up and running, how much better the flow is when the fans kick in when the sump guard is off...and how when it's bolted back on, you can hear the fans working harder, with much reduced flow past the guard. Quote:
So effictively its a circut that bypasses the heater unit (but the heater can still operate if needed) Quote:
I think you're right about the water mister, that could be my final play if I still have dramas. |
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01-18-2022, 09:53 AM | #18 | |
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Depending on your usage of the vehicle, you might be about to modify your cowl(windshield wiper surround) to allow air to escape up the windshield without modifying the hood itself. I'm not sure what affect that opening might have during daily driving. Cause your climate control air to be hot? The OEMs seal it up for a reason, but I couldn't tell you what it is. It's not uncommon for people to put risers under the back of the hood to achieve that gap. They seem to do ok. Modifying the cowl would be nearly invisible from the outside Sent from my ONEPLUS A5010 using Tapatalk |
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01-18-2022, 10:37 AM | #19 | |
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Making a gap at the back of the hood might be counter productive as there is high pressure air in front of the windshield (when the car is moving at speed) that would limit the air flow from under the hood. I fabbed up some garnish vents. That area seem to have relatively low air pressure. |
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01-18-2022, 10:55 AM | #20 | |
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01-18-2022, 11:32 AM | #21 |
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Good question. It is my understanding that both areas have high pressure. That's why hood vents are placed closer to the front and/or sides of the hood where the relative pressure is lower.
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01-18-2022, 03:18 PM | #22 |
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If you put a gurney flap at the front of the opening it helps suck air out by creating a low pressure void. My Driveway Labs duct is designed that way and it moves quite a bit of air. I believe the gurney is also on the Verus ducts.
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01-18-2022, 03:45 PM | #23 |
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I can't visualize where the Gurney flaps you describe are located. I've seen them on rear spoiler and wings but not on the front of a car. Any Pictures?
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01-18-2022, 03:58 PM | #24 | |
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I am not sure how having the windshield behind would affect things. Sounds like some string testing would be in order if someone where to try this
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01-18-2022, 07:48 PM | #25 |
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How are the lines protected under the car? I'd be concerned with losing coolant for how little extra surface area you added. Interesting idea though.
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01-19-2022, 05:33 AM | #26 | ||
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The lines run protected along side the brake lines (under the underbody cover), then skirt around the bottom of the wheel well, but behind the damper, then into the rear cover. I will be making a small alloy shield for the small portion where they enter the under body cover along side the brake lines. Last edited by grumpysnapper; 01-19-2022 at 06:56 AM. |
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01-28-2022, 09:42 AM | #27 |
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Decided to give the setup a proper check after a week of hard use, so took off the rear bumper.
Its working really well, temps appreciably lower in areas/uses that used to concern me, and cool down after a hard run is noticeably quicker. It's venting very well, and appears to be drawing a reasonable air flow through when the car is at speed, and the fans are not operating... the negative pressure at the rear might actually be working to some degree. So far, a success. (touch wood!) Last edited by grumpysnapper; 01-28-2022 at 06:12 PM. |
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