Does this cold air box need a lid or is the hood enough?
2 Attachment(s)
Had some issues with the car heat soaking at the last autocross I did. It was mid 90* temps and I was able to get about 10 (~50 second) runs in before it started to pull timing on my co-driver. I had the intake coming right off the turbo behind the radiator fan. I would spray down the intercooler and tires between runs 4-10 but it didn't seem to help the heat soak. This is 2nd gear rev limiter stuff so all the boost/rpm. Would closing in the top of this box help me more than just using the hood? I am sure there are a few gaps under the hood as I didn't take the hood off and attempt to build this thing upside down. I'll probably put a small vent or something in the headlamp cover, or a small NACA duct? It's a non-vented hood as well. I've got a build video in my build thread for those interested.
Attachment 228430 Attachment 228431 |
I'd do an experiment: simply remove the headlight cover, run another event, and compare logs. Unless this is an AutoX course the likes of which I've never seen, the minor aerodynamic disruption should cause no harm.
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Originally Posted by Joe Perez
(Post 1506459)
I'd do an experiment: simply remove the headlight cover, run another event, and compare logs. Unless this is an AutoX course the likes of which I've never seen, the minor aerodynamic disruption should cause no harm.
That's a good idea. I was going to try it with the headlights up and remove the drive side light. I've not removed the skin of the light before so I am not exactly sure how difficult it will be. |
Been a while since I owned an NA, but I've done it. My recollection is that it's fairly easy. Put the lights up, remove the black plastic trim piece, and then I think it's only two screws on each side holding the lid on.
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Originally Posted by 90civichhb
(Post 1506462)
That's a good idea. I was going to try it with the headlights up and remove the drive side light. I've not removed the skin of the light before so I am not exactly sure how difficult it will be.
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Cool, I'll remove it and compare logs. Good to know it's that easy to take off. I may just print a NACA duct and rivet it under the skin.
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Originally Posted by 90civichhb
(Post 1506613)
Cool, I'll remove it and compare logs. Good to know it's that easy to take off. I may just print a NACA duct and rivet it under the skin.
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Originally Posted by Braineack
(Post 1506623)
you misspelled epoxy.
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On my NA build with a similar heat shield / air box, just putting the lights up dropped my intake temps 5-10°F. It's not really sealed to the hood (couldn't with custom hood vent). I'm planning on cleaning and painting a RS Aiziwa lid to better direct air into shielded area on that premise.
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Originally Posted by Midtenn
(Post 1506667)
On my NA build with a similar heat shield / air box, just putting the lights up dropped my intake temps 5-10°F. It's not really sealed to the hood (couldn't with custom hood vent). I'm planning on cleaning and painting a RS Aiziwa lid to better direct air into shielded area on that premise.
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Originally Posted by 90civichhb
(Post 1506669)
Those seem pretty affordable. I just hate trying to match paint. This old 1990s red is just going to be impossible to match with anything in a spray can. lol
Don't try to match old finishes. Do something contrasting or complimentary. Maybe you just leave the original red in place, try to screw up as little of it as possible during the process, and trace the outline of the cutout with a 1/2" wide stripe of semi-gloss black, for instance. |
Originally Posted by Joe Perez
(Post 1506679)
Maybe you just leave the original red in place, try to screw up as little of it as possible during the process, and trace the outline of the cutout with a 1/2" wide stripe of semi-gloss black, for instance.
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This may be a dumb question but "Where is the Cold/Fresh Air entering this box?".
Only through the front via the slim channel on the engine-side of the headlight? NB's duct cold/fresh air in on the front port-side of the engine bay but you've walled that off. If NAs do the same, get rid of that wall and run the rear wall all the way to the side of the car. Here's mine (an NB but you get the idea): https://cimg7.ibsrv.net/gimg/www.mia...ea4c2a591a.jpg I also ducted air up from the front fog light into this box too. Details here: Cold Air Box https://cimg6.ibsrv.net/gimg/www.mia...f82be83eb5.jpg |
1 Attachment(s)
Originally Posted by Lokiel
(Post 1506948)
This may be a dumb question but "Where is the Cold/Fresh Air entering this box?".
Only through the front via the slim channel on the engine-side of the headlight? Attachment 228429 |
So here is what i made for the first track day with a turbo. Car has done lots of events being NA, track and autox and always had good temps. Im running a coolant reroute and ducting for radiator and inter cooler and hood vents. The box for the intake itself seems to help a lot. Ambient was roughly 80 that day and i had intake temps of 100-105 all day. I have not experimented with a closed box or anything else yet. What really did help was the ducting while street driving especially.
https://cimg0.ibsrv.net/gimg/www.mia...3d92f63c05.jpg https://cimg1.ibsrv.net/gimg/www.mia...3221f64f79.jpg |
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