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Old 03-17-2003, 09:09 AM   #1
99OBSter
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Default Yet another ram air

See what boredom and a warm weekend will get you?




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Old 03-17-2003, 09:10 AM   #2
DanzBorin
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Does the foil make it faster?
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Old 03-17-2003, 09:12 AM   #3
99OBSter
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Nope, just ghetto,m which is why a ripped it all off. Well, sorta, the stuff can be a PITA to get off.
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Old 03-18-2003, 07:42 AM   #4
99OBSter
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Default 1999 MAF intake

I'm posting this in case anyone does a search.

I used a Kartboy adapter, which I think is a little over priced for an aluminum tube, but what they hey, it's the only thing out there and the workmanship is good. I also used a K&N filter that I bought at KNfilters.com. I got the biggest one that would fit in my car, which was a little too big. It hits my ABS module. Eventually I'm going to get a smaller filter.

Taking off the old air box was supper easy. It's only held on by two bolts. The MAF attaches to it with 4 small bolts.

The hardest part were making the braces. I wanted to make sure the MAF wouldn't wobble around at all, so I went out to Lowes and got a piece of metal that was about 6 feet long and 1" wide. I then chopped it to size with a hacksaw and hammered it into shape with a vice. A couple of holes and the fit was great. I'm very pleased with the whole look. For once, something I did to my car actually looks good!

As far as gains, I'm very pleased. Lost some low end, but gained some high end. In 1st, my car screams to 6K rpm. And the sound? Grrreeeaaaatttt!!!

I think I will put the vent cover back on to prevent water from getting into the filter. The filter's oiled, but don't want to take any chances.
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Old 03-18-2003, 08:10 AM   #5
BoyRacer
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Default confused

I'm confused... Is this really a "Ram Air" setup? I thought it was only called "ram air" if you had air blowing into the intake. Since your not even piped into the fender, I don't think this is even a cold air intake. It's just an intake right? You sould get better flow and sound out of it, but no "ram air" or cold air advantages.

Am I missing something? I often do.

MGB
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Old 03-18-2003, 08:42 AM   #6
99OBSter
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Yeah you're probably right, but just wait until i get my snorkel in from the hood scoop to the air filter. That damn hood scoop might actually be marginally functional!
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Old 03-18-2003, 08:54 AM   #7
BoyRacer
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I'm planning to plumb my hood scoop into my intake too. That will be real ram air.

MGB
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Old 03-18-2003, 10:05 AM   #8
danci1973
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Default Re: 1999 MAF intake

Quote:
Originally posted by 99OBSter

I think I will put the vent cover back on to prevent water from getting into the filter. The filter's oiled, but don't want to take any chances.
I have a very similar setup, however instead of covering the fender hole, I made aluminum heat shield to stop the heat from the engine. Since I don't have fog lights I cut the plastic that was there and installed a mesh grill instead. This should get plenty of air into the fender and into my filter - it may even be pressurised...

The temperature difference right after stopping is huge - hot on the engine side and cool on the filter side - and it even increases after sitting a couple of minutes.

I haven't had a problem with water or snow yet.

D.
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Old 03-18-2003, 10:32 PM   #9
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Default Heat or not to Heat

I heard an interesting point the other day about heat shields within the engine compartment. Although I will not remove my stock filter box, I'm going with the silencer removal and Amsoil panel set-up; I probably would make a heat shield because I'm meticulous like that. Anyway, this guy told me that under the hood temperatures only rise when sitting still and who needs HP then? As you start moving, colder and denser air will make its way into the engine compartment. Just another point of view, thatís all.

-Charles-
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Old 03-18-2003, 11:20 PM   #10
joefocker20
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Have you ever stopped and felt your intake after driving, the suckers pretty hot.
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Old 03-19-2003, 02:37 AM   #11
danci1973
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Default

Quote:
Originally posted by joefocker20
Have you ever stopped and felt your intake after driving, the suckers pretty hot.
I guess the heat shield / CAI stuff really works as my sucker doesn't get nearly as hot as before, when he was sucking hot air.

D.
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Old 03-19-2003, 07:19 AM   #12
99OBSter
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Yeah, I was looking in the compartment and wondering how to make a heat shield. Haven't come up with an easy way. Anyone got pics of theirs?
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Old 03-19-2003, 09:33 AM   #13
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Adding a CAI means sacrificing low end, where the EJ25 is pretty good at compared to the low compression EJ20. I was thinking of making a DIY intake but most of my driving is city so I need the low end grunt. Ideally, I would like to come up with a system which switches without too much hassle from a CAI to stock airbox. Just in case I go lapping or touring.

99OBSter, did you loose low end power by removing the air filter box?
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Old 03-19-2003, 10:30 AM   #14
99OBSter
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I did lose a bit of low end. But, really, not as much as I thought I would. I guess that torque box thingy actually works ok. My car can still beat any comparible car off the line.

I basically kept everything stock except the air filter itself. Same piping, same plastic plenum "resevoir" behind the throttle body, etc.
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Old 03-19-2003, 10:42 AM   #15
BoyRacer
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Quote:
Originally posted by Pocon
Adding a CAI means sacrificing low end, where the EJ25 is pretty good at compared to the low compression EJ20. I was thinking of making a DIY intake but most of my driving is city so I need the low end grunt. Ideally, I would like to come up with a system which switches without too much hassle from a CAI to stock airbox. Just in case I go lapping or touring.

99OBSter, did you loose low end power by removing the air filter box?
Actually he didn't remove the air filter box. You can see it in the top picture partly wrapped in tin foil.

I saw that he said he lost a bit of low end, but I don't think he actually did. Does he have any numbers or is he just using his buttdyno? From what I can see he just attached a filter to the end of his stock intake system and (hopefully) took out the stock panel filter, oh ya, and added a bunch of tin foil. I'd say that this would make a very small performance improvement with ZERO loss of low end torque. Also it probably makes more noise since he's removed some of the muffling crap.

MGB
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Old 03-19-2003, 10:45 AM   #16
99OBSter
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Boy Racer, there isn't an air filter in the box behind the throttle body in a 1999 OBS. That's only in MAP 2000+ cars and cars in california. So the air intake you see is THE air filter for the car. Which is why you can gain a bit of HP by doing this. Not saying a lot, but maybe a little.

And of course I'm using my butt-dyno. No 4WD dynos in good ole Dayton!
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Old 03-19-2003, 10:50 AM   #17
BoyRacer
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Quote:
Originally posted by 99OBSter
Boy Racer, there isn't an air filter in the box behind the throttle body in a 1999 OBS. That's only in MAP 2000+ cars and cars in california. So the air intake you see is THE air filter for the car. Which is why you can gain a bit of HP by doing this. Not saying a lot, but maybe a little.

And of course I'm using my butt-dyno. No 4WD dynos in good ole Dayton!
Oh right, I forgot, no panel filter to worry about, cool.

The fact remains you've left the air box attached to the throttle body. This is where the low end torque could be lost, but won't be in your case since it's still in place.

MGB
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