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GraphiteDak
GenIII
 
8/05/2005
20:02:41
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 Subject: Put the other CAI back on.
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After getting the Superchips tuner and setting for 91 octane I had pinging a few times. Since it's HOT in Phoenix right now and I no longer take my 4X4 off road through 3 feet of water and mud anymore I decided to put the other set up back on. There's a few fitting I did different and to my liking, it doesn't have that dreaded resonance at around 2800 RPM's like the first time I made one just like this.
I was out checking things, rotating tires, etc on the Dak today so I took new pics.
The air filter is behind the opening next to the right fog light. It is completely sealed from the engine compartment.
Over a year ago I had cut this hole through the metal by the fender. I only removed that intake set up because I was going off roading a lot where we flew through 2 and 3 feet of water. Kind of made me nervous having the intake down there at the time.
I think the only thing I should do different would be a bigger K&N filter. That 3 inch cone style one may be slightly too small.
Anyway. That's a heck of a lot cheaper than I see people pay for that K&N FIPK or whatever it's called and works better I'm sure.
Thought I'd share some pictures since Cold Air Intake tubes are something asked about a lot on here.
Oh yeah. None of them fittings are glued. They are secured with short screws and then sealed with cork tape.
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Anthony
Dodge Dakota
JOIN HERE
8/05/2005
21:12:11
| RE: Put the other CAI back on.
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I really like that idea!!! That K&N cone filter is fine, I wouldn't worry about it size.
What was causing the resonance at 2800rpm?? Did you notice a difference in performance from this cold air setup vs an engine bay setup??
Now to find a 3.5" metal hole cutting bit...
Anthony
www.geocities.com/dak2nv/
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8banger
GenIII
8/05/2005
21:51:07
| RE: Put the other CAI back on.
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Graph
Did you notice any difference in engine noise when you removed the stock box and hat? I read somewhere that you can hear the air sucking through the CAI's.
I want to make a home brew, but not if its gonna making excessive sound.
03 Dakota 4X4 QC SportPlus 4.7L 3.55 LSD
Superchipped, 2Chamber Flowmaster dumped, K&N Drop-In, 2"T-crank
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GraphiteDak
GenIII
8/06/2005
01:48:15
| RE: Put the other CAI back on.
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Let me look for one of my OLD intakes like that...
Here's the crude HOLE I had to cut. The 3 1/2 in bit was SHOT so I think I ised a 1/4 in bit about 25 times then finished with the air chisel!
And there was my ORIGINAL through the bottom fender air intake. It was the NOISY one. Don't know WHY it was so noisy. I even had insulation on it at one time. But it was the lind of resonance that got into your skull!
The one I just installed very similar to that one is just fine. Not really loud but noticeable I guess. Not annoying at all.
I noticed that when I ran the first one I had a sweet spot right as it hit the rev limiter. Now that my limiter is moved from 6K to 6500 I decided to try that style again plus like I said, reduce chances of HOT air from the radiator when I'm running the 91 setting with all the spark advance.
If you click on my signature below. You can find ALL of my projects on my Dak and everything else. Projects that worked. Projects that didn't work. I take pictures of everything.
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confused
Dodge Dakota
JOIN HERE
8/06/2005
07:26:50
|  RE: Put the other CAI back on.
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How could you possibly be sure that is better than a K&N FIPK ? Did you dyno it to show how much more power it made to say it is better ? Unlike many other CAIs, they didn't release theirs until they were able to show a gain. Let's keep the claims honest here guys !
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Anthony
Dodge Dakota
JOIN HERE
8/06/2005
09:15:22
| RE: Put the other CAI back on.
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Thanks Graph!!
I went through your web site... Why didn't you keep the stock air box setup with the pipe running to the cut out?? That's also a nice setup, that's what I've been thinking of doing.
This is my 3rd intake (winter pic) which is not finished it needs paint. But it has a heat shield which seems to work great.
Anthony
www.geocities.com/dak2nv/
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GraphiteDak
GenIII
8/06/2005
15:31:50
| RE: Put the other CAI back on.
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Confused, I mean for the PRICE I think people get ripped on something they could just MAKE. Aren't those things like OVER $200???
Go to a Plumbing store (NOT Home Depot) and you can just about get the short pieces of ABS for FREE (scrap to them) if you buy all the fitting there. Depends on the store. Fittings would be about 1/3 as you would spend at Home Depot. You CAN still buy everything at Home Depot. Just a bit more. Don't forget teh plumbing FRNCO fittings (rubber adapters) to connect to your TB from the ABS.
You can walk right into most auto stores and buy a K&N filter for under $50
So for $75 or maybe less you have a intake that REALLY draws in all outside air. How can that NOT be better than one with a radiator "shield"?
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Like this
Dodge Dakota
JOIN HERE
8/06/2005
17:24:54
| RE: Put the other CAI back on.
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If it doesn't make more horsepower, it isn't better - just cheaper. Why don't you dyno before and after if you really want those bragging rights ?
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8banger
GenIII
8/06/2005
19:18:55
| RE: Put the other CAI back on.
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Graph
Hahaha...i was checkin out the ricer section on your site. Here's one that you missed, I may be wrong but I think those are Arizona plates.
hahaha...that is absolutely absurd!
03 Dakota 4X4 QC SportPlus 4.7L 3.55 LSD
Superchipped, 2Chamber Flowmaster dumped, K&N Drop-In, 2"T-crank
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chris
Dodge Dakota
JOIN HERE
8/06/2005
23:10:38
| RE: Put the other CAI back on.
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Hey GD,
Do you have enough play in the intake so when the engine twists under torque it doesnt pull the assembly apart?
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GraphiteDak
GenIII
8/07/2005
14:31:24
| RE: Put the other CAI back on.
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LOL 8banger. That picture has been around for a few years. But I haven't seen it in the real.
Some think that is a hoax vie photo shop or something :p
chris. I have the fernco rubber adapter at the TB. And most connections are screwed together and then sealed with cork tape (some sticky a$$ sh*t!)
I dunno how it would dyno. I wouldn't bother taking it to a dyno for that.
But last night I DID beat a 2WD Chevy 1500 RC with the 4.8 V8 by 1/10th of a sec at Speed World. (See my other post). That is My 4X4 QC beating a Chevy 2WD RC truck!
I also almost stayed with a 2WD Hemi RAM. And he had LSD diff and everything. I was spinning one wheel most of the night. By time I raced him I dropped my tires to 30 PSI after I saw him do that.
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Mr clean
Dodge Dakota
JOIN HERE
8/09/2005
02:04:48
| RE: Put the other CAI back on.
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GraphiteDak: CLEAN THAT ENGINE!!!!!!!
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DSW
Dodge Dakota
JOIN HERE
8/09/2005
03:14:42
| RE: Put the other CAI back on.
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GD,
I just reworked my HAI to a CAI, looks something like Anthony's, but has a foam seal on top to keep all the hot air away from the air filter. Now the engine only pulls air from the grill area. Went to Lake Havasu after the rework, popped the hood, and noticed a huge difference in temp of the ABS pipe on the engine side of the heat shield and the filter side of the heat shield.
When I was doing the project I stopped by HomeDepot and picked up every imaginable 3" ABS fitting that I could use and also picked up a couple of 3" PVC electrical conduit 90 bends. I tried to use the electrical PVC since they have a real nice long smooth bend, but my filter was too danm big to work with these fittings. I saw your pics and thought to myself these ABS electrical fittings would work great with your setup to help straighten out the air flow going into the TB. You would only need 2 fittings since they are so long, one going from the TB to the area by the oil filler neck and the other going from the filler neck down to the hole in the fender. I might be wrong about the fittings, but they would certainly flow much better than the tight turns of the ABS fittings, might be worth a stop by HomeDepot's electrical isle?
Bad resonance from a CAI at certain RPM's,, sounds to me like the CAI is tuned to the wrong frequency. A ported sub box with a port made to specific dimensions will accentuate the bass at certain frequencies. If a CAI was made to the correct dimensions to accentuate the engine's intake pulse at certain RPM's it could make an annoying resonance. IE, your truck cruises at 2500 RPM's and the CAI was made so that it accentuates the intake pulse at 2500 RPM = annoying resonance, chop off an inch or add an inch to the CAI and it could eliminate the problem or move it away from your cruise RPM so it is not annoying.
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GraphiteDak
GenIII
8/10/2005
02:29:53
| RE: Put the other CAI back on.
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I'll check them electrical fittings out. i did have one electrical fitting until last week. The one (gray) that has the threaded ring nit on it. that was used to secire it to that 3 1/2" hole in the front of the fender.
But the other day my bro in law was over here and he has this HUDE K&N Filter with a 4 " connection that fit OVER the ABS. I had a 3" K&N filter that I had to use a piece of 3" metal pipe to adapt from the ABS. So I drilled my hole BIGGER in my fender area and got one of those 4" filters to bolt on. Nearly twice the filter area and 1" bigger opening.
Not sure if it made any difference though.
As far as resonance. That's exactly what happened with my old one. So this latest one I installed (liek I said, made a new one over) it could have one section 1 inch longer or shorter, and that's all it took to change the "tune" of the pipe. No noise. However. When I HAD that resonance, I think I had a little PEAK in flow with it :p
That was the only time my little 287 seemed to have a peak in power vs. the very flat response it usually has.
My goal is to someday make a home made intake manifold. Thinking along the lines of a dual runner plenum that opens short runners at a certain RPM and above via some actuated damper.
I think I could build that if I get the time and some extra cash to throw at it.
I'd like to buy someone's old intake (cheap like an undesirable early 4.7 non HO) just to inspect and take apart to investigate.
Oh. I also noticed my engine was DIRTY in them pix. At one time I always kept it clean. i need to paint my intake too once I know how I like it.
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Android287
GenIII
8/10/2005
23:33:52
| RE: Put the other CAI back on.
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I have an old manifold still. What's it worth?
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N56629
Dodge Dakota
JOIN HERE
8/11/2005
06:42:41
| RE: Put the other CAI back on.
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"If it doesn't make more horsepower, it isn't better - just cheaper. Why don't you dyno before and after if you really want those bragging rights ?"
That's pretty much true except for one thing - You can't really dyno a CAI because the air flow standing still on a dyno is not the same as driving down the road.
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SterlingCTdak
Dodge Dakota
JOIN HERE
8/11/2005
15:59:16
|  RE: Put the other CAI back on.
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You can infact dyno a CAI. If there is graeter flow from the new intake, it will certainly show on the dyno. How do you think all of these over priced CAI manufacturers get there info from? They donn't spend all of there time driving around to get there readings, they dyno it. As far as there pricing they price these intakes so high, because they know the performance gains that they make, not because it costs so much for materials. All I know is my home brew intake has made a world of difference not only in sound, but definitely in performance, with no loss in MPG.
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GraphiteDak
GenIII
8/11/2005
22:43:46
| RE: Put the other CAI back on.
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Umm. I'd have to think DRIVING is a LOT different than sitting on a dyno.
I'll use MY OWN CAI as an example. What IF as I drive at certain speeds, that air pressure doesn't encounter some STANDING WAVES of some sort, causing LOW pressure where my filter is where I'm HURTING myself at ceratin speeds???
Just like tuning a speaker, I think different lengths of air intake tubes change where the air flow really flows (peaks) and where you PLACE the intake filter or inlet could have an effect.
Check this thing out we did, as a MOCKERY at the time...
POS 1993 Chevy Baretta beater my friend had.
STOCK air intake. Took air through the little tube behind the head light.
Made this custom sheet metal "scoop" thingie that forced air directly into the air filter.
Cut a cole in the hood. Bent things with the hammer, etc etc. This directs air into that sheet metal scoop.
Did a quick bondo + paint job.
True RAM AIR cold air intake at it's BEST.
Made such a difference that this POS Chevy 3.1 3 speed auto then kept up and about beat the 5 speed Altima I had at the time!
And it just matched my truck when it was new.
If I could only make something work LIKE this on my beloved Dak, but not look so ugly...
Android. $25 bucks plus shipping????? :) Dunno what you think it's worth. In the end I'll most likely be cutting it apart to see what makes it go, and maybe moddifying it for experimenting. Kind of not ready to experiment on my ONLY OEM intake :) And mine's an '03, so it was the same issue as the '03 HO intake.
Doesn't that thing use o-rings instead of a paper gasket I've heard???
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Android287
GenIII
8/11/2005
22:50:12
| RE: Put the other CAI back on.
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SOLD!
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