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Forced Induction Turbo, Supercharger, Methanol, Nitrous


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Old 10-05-2015, 09:18 AM   #43
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@shiumai did you replace the seal with a spacer of any sort? I know you said that you can "feel" the air venting but what was your temp decrease if any?
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Old 10-05-2015, 09:47 AM   #44
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@shiumai did you replace the seal with a spacer of any sort? I know you said that you can "feel" the air venting but what was your temp decrease if any?
No - i didn't replace it with anything. Were you worried about hood flutter? I'm wondering whether hood flutter is due in part to the lack of venting. I didn't notice any flutter before or after i removed it, but that's at speeds below 80-90 mph.

i don't have an accurate temp gauge with numbers, and it's hard to see differences with the temp gauge in the car. like you, i'm curious to see if anyone boosted did this and saw a temp difference as well, or just someone with a more accurate temp gauge.
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Old 10-05-2015, 10:10 AM   #45
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The faster you go, the more heat a car produces, not just from the engine, but from every component. If you want to go fast, you need to manage heat.

Thing is, heat management is probably the most important aspect of going fast in a car, and it's something that you don't really think about before going fast if you're the driver. But you better believe that the engineers are all about managing temperatures.

This new video from /DRIVE explains why.
[ame="https://www.youtube.com/watch?v=s1QpD5vY1u4"]The Most Important Part of Going Fast - /ENGINEERED - YouTube[/ame]
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Old 10-05-2015, 02:23 PM   #46
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I first went with cutting out the side of my fenders to act as functional heat extractors. I'm curious as to how these would affect flow at higher speeds, but at least at idle they helped tremendously with heat on the stock hood. It would literally feel like walking by a heater with the side of the fenders open.

I have the VIS hood now so the fender heat extractors are somewhat less effective. I still feel heat coming out of them however. My car isn't 100% since the turbo install so I can't comment on underhood temps. I did both mods proactively to help with the inevitable heat increase from the turbo.





Final look:




Here is a video showing the side vent area with the hood closed. The hood looks like it would block them, but there is in reality a lot of room for air to escape from. I do not have a similar video showing the inside now that they are complete, but I can definitely take one once I have my car back if requested.

[ame="https://www.youtube.com/watch?v=elRijf_Jw2o"]BRZ / FRS Possible Fender Heat Extractor Location - YouTube[/ame]
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Old 10-05-2015, 03:16 PM   #47
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Have you guys removed the rubber seal between the rear of the hood and the plastic part in front of the windshield (forward of the windshield wipers)? It's been mentioned before in the past, so i assumed that it's the first thing removed by anyone looking to reduce under-hood temps.

Removing it creates a hood-width sized gap at the rear of the hood. I removed mine more than a year ago and can feel hot air venting through the gap after I've stopped the car, so at least i know it does do 'something' when stationary or in stop/go traffic. Since it looks like it's a low pressure area, i'm assuming that air is being drawn through the engine bay and out of the gap while driving. I have not noticed any hood flutter at highway speeds either.


Base of the windshield is a high pressure zone at speed, it's why they pull fresh air for the HVAC system there and why cowl induction hoods work. In essence you're making the cooling system work harder because you're pressurizing the area behind the radiator.
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Old 10-05-2015, 03:41 PM   #48
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Base of the windshield is a high pressure zone at speed, it's why they pull fresh air for the HVAC system there and why cowl induction hoods work. In essence you're making the cooling system work harder because you're pressurizing the area behind the radiator.
so, i wonder whether that gap acts like a cowl induction hood then, instead of a vent. to find out what's actually going on in that area would require some experimentation. does air vent out of the gap, or is pushed into the gap? time to tape tufts of string to the trailing edge of the hood, LOL.
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Old 10-05-2015, 03:41 PM   #49
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@BRZoomTX could you do the same video with the new holes you cut? I'm really tempted to do it to my BRZ
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Old 10-05-2015, 05:23 PM   #50
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@BRZoomTX could you do the same video with the new holes you cut? I'm really tempted to do it to my BRZ
Will do as soon as I have my car back. In the video if you look at the left clip for the garnish, everything between the top bend in the metal and the bottom bend is now gone. You could cut a little more off, but I wanted to leave enough room for mounting the garnish with tape.
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Old 10-14-2015, 09:52 PM   #51
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Does anyone foresee any issues with rain? i wold love to add the vents like the OP did, but living in Florida with all of our rain I don't think its gonna work...
How is all the rain coming in from the grill opening at 70mph on the highway worse than rain falling into a vent when parked?
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Old 10-15-2015, 01:53 AM   #52
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I haven't been keeping track since about a year ago. See this post:

http://www.ft86club.com/forums/showp...&postcount=410



What happened to the cowling mods for cooling?




EDIT ---- found it http://www.ft86club.com/forums/showp...&postcount=114


thanks.
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Old 10-15-2015, 11:38 AM   #53
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ill chime in with this. we had to shim the rear of the hood up 1/2" to fit the last turbo we had in the 2jz swap car. at the drag strip the wipers were flapping and going up the windshield about 1/4 of the way at the top of the track (140mph). the new turbo doesnt need the extra space so it will be neat to see if it happens again with the hood fit as oem. i would assume that would mean air is coming out of the bay and pushing them up. just something for thought. I have not had the rubber hood seal in my car for over a year. I never have heat issues but i street/drag race so i know its not nearly as much of an issue as a road course would produce..
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Old 11-20-2015, 12:09 PM   #54
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There's a member on here who started making these. I'm looking at picking a set up from him to install over the winter. Very cost competitive and built for our cars. @Ashikabi

http://www.ft86club.com/forums/showthread.php?t=96712
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Old 11-20-2015, 12:32 PM   #55
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There's a member on here who started making these. I'm looking at picking a set up from him to install over the winter. Very cost competitive and built for our cars. @Ashikabi

http://www.ft86club.com/forums/showthread.php?t=96712
Hmm. Those look a little too out of place for my liking. I think I'd still prefer a CF hood over vents on the stock hood.
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Old 11-20-2015, 02:29 PM   #56
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We will have a "kit" coming out early next year as well that people can choose from. This unit in the pictures are of prototypes.

The wickers will be bent aluminum (not blue 3D printed plastic), we will offer quick to remove rain trays for those concerned with water, wickers are removable but greatly increase effectiveness, mounting may change to press in studs for a cleaner look (still experimenting with this), and they will be competitively priced. We are still sorting through the thermo-couple data and videos and will start a respective thread at that point.







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