air filter heat shield.
Sep 20, 2007, 04:00 PM
#16
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btw, looks like you can get a new snorkel/duct thing pretty reasonably.
http://www.trademotion.com/partlocat...13&catalogid=2
I dunno anything about those guys but if the MSRP is 35 bucks, you could go to your local parts counter, save yourself the shipping cost and come out about even.
My metalwork talents ran out when it came to the fiddly stuff around the duct exit, so I ended up using little bolts as you can see.
The thing that bugs me to this day about my shield is that there's a bit of a gap underneath. I tried to bend the metal under but it's not really enough. I have it all out at the moment for a clutch line install, so I might try and add more coverage underneath.. or possibly a second duct.
Evo_Kid: it's not a competition
Just cool (ha) to see what solutions people came up with independently.
Sep 21, 2007, 02:34 AM
#18
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I had the same idea a few years back (wow.. actually 4 1/2 years now, time flies when you have an Evo )
https://www.evolutionm.net/registry/...d.php?mid=6747
It doesn't look that shiny any more, but it still works like a charm. If I remember right, at the time there was some concern that hotter intake temps might cause the ECU to pull timing, significantly offsetting any gains that an open filter might feasibly bring. Dunno if this was ever proved true or false but it's definitely true that colder air = denser air, so an intake shield can't hurt. Also it seemed like a shame to chuck out the OEM air duct.
I've meant for ages for redo it with carbon fibre sheeting (like they use for battle robots) but never got round to it yet. If I do that now I'll probably enclose the whole thing. BTW the rubber seal thing can be bought at PepBoys or wherever, it's door seal and comes in a roll. It'll take a few tries to make sure you're making a decent fit with the underside of the hood - you can look through the vent to see how you're doing
I made a cardboard template also, and used the bracket on the IC tube to secure the shield with a bolt.
)https://www.evolutionm.net/registry/...d.php?mid=6747
It doesn't look that shiny any more, but it still works like a charm. If I remember right, at the time there was some concern that hotter intake temps might cause the ECU to pull timing, significantly offsetting any gains that an open filter might feasibly bring. Dunno if this was ever proved true or false but it's definitely true that colder air = denser air, so an intake shield can't hurt. Also it seemed like a shame to chuck out the OEM air duct.
I've meant for ages for redo it with carbon fibre sheeting (like they use for battle robots) but never got round to it yet. If I do that now I'll probably enclose the whole thing. BTW the rubber seal thing can be bought at PepBoys or wherever, it's door seal and comes in a roll. It'll take a few tries to make sure you're making a decent fit with the underside of the hood - you can look through the vent to see how you're doing
I made a cardboard template also, and used the bracket on the IC tube to secure the shield with a bolt.This is way cool, I would like to do something like this for mine. Very clean.
Sep 21, 2007, 09:48 AM
#19
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It does stand to reason that once the shield has soaked up the heat from the engine, it'd radiate more of it back into your 'sealed off' area. On the other hand, there is constant airflow through the engine bay (when you're moving) and especially with the duct/snorkel directing ambient temp air to your sealed area it does make a difference.
I logged the intake temperature at the time with the shield on, and when the car was moving, it was consistently close to the ambient temp that day (80ish if i remember right), which of course is the minimum you're ever going to get anyway. Since I have it out, I'll do some back to back comparisons, shield on and off.
I guess the easiest thing would just be to put the stock box back on really. But where's the challenge in that
Sep 21, 2007, 08:14 PM
#20
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rollo, lmk if you want to get rid of that one. I will for sure take it off your hands, if you decide to do a cf one. I can wait for it too, or make an exact one like that for me and I will buy it. I just like the overall design of yours.
Oct 13, 2007, 02:42 PM
#21
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loofee, is there going to be an update soon, you have a talent that you can share with the rest of the Evo world and that is creativity, all you have to do is write it down and draw it up for us not so creative ones. We appeciate creativity that not only is effective but also looks good to.
its all good. 
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