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Old 07-06-2003, 17:37   #1 (permalink)
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Thumbs up EF Airbox into EA 3.9L and stnd manifold

Hi people,

On the weekend I decided to fit an EF airbox into my EA, I modified the air filter with a few snips and a little bit of removal of airfilter fins, into the airfilter to be able to mount it upside down in the air box (so the metal grid is on the side of the intake), I used the standard bottom intake of the EF air box to goto the engine with a shortened stock EA intake rubber inlet (shortened it on the airbox end), I shortened the airbox end of the XH snorkle (just past the lip so that it has no lip anymore), I then cut a hole to be able to push that into the air box to give me the air intake side of things, I removed the standard EF air intake pipe, and put a block off plate over the intake hole in the airbox lid.

Fitted into the EA engine bay without any clearance problem, the pipes leading to the canister under the inner guard, have to be pulled up a little bit to give a bit of clearance, that was the only problem, looks reasonably stock as well apart from a block off plate.

I will post pics and more detailed information if there is enough interest, so tell me your interested in seeing more, and I will take the time to take and post the pics, and write a few more words.

COST: EF air box 2nd hand $45.00 (new around $140), Cheap air filter $15.00 (will get better one later), XH snorkle was $40 new (2nd hand don't know, and I already had this). So say $100 bucks total, using some 2nd hand parts.

Any other questions then please ask :s6:

Dellboy999
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Old 07-06-2003, 18:05   #2 (permalink)
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Re: EF Airbox into EA 3.9L and stnd manifold

hello, sounds like you had a bit of fun, although as far as I know the only benefit of the EF box over the EA box is the pickup tube inside the lid, but with you using the XH snorkel, this tube is not used right? Pics would be nice if not too much trouble
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Old 07-06-2003, 18:09   #3 (permalink)
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Re: EF Airbox into EA 3.9L and stnd manifold

Thats right, the pick up tube is not used, but the bigger air box, means more avaliable air on tap for throttle response and better breathing as there is far more filter surface area in the EF airbox.

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Old 07-06-2003, 21:36   #4 (permalink)
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Re: EF Airbox into EA 3.9L and stnd manifold

ah thats right, the EF/L/AU use a much larger filter dont they?
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Old 07-06-2003, 23:20   #5 (permalink)
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Re: EF Airbox into EA 3.9L and stnd manifold

Yes its alot bigger by about 1/2 as much again from sight, I will measure them tonight and post tomorrow the dimensions.

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Old 07-07-2003, 04:30   #6 (permalink)
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Lightbulb AirBox Picstures

Here are the pics of my mod.

1st pic is the stnd
2nd pic is the EF box
3rd pic is the canister pipes and shortened intake ea pipe
4th pic you can see the diff in air filter size
5th pic you can see the cut to make the air filter fit right way up
Attached Images
File Type: jpg Intake_EEC-4_s.jpg (43.1 KB, 50 views)
File Type: jpg Intake_EEC-V_s.jpg (40.4 KB, 61 views)
File Type: jpg Canister_Pipes_s.jpg (45.1 KB, 48 views)
File Type: jpg AirFilter_Compare_s.jpg (36.3 KB, 35 views)
File Type: jpg AirFilter_Cut_s.jpg (29.4 KB, 34 views)
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Last edited by Dellboy999; 07-07-2003 at 04:33.
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Old 07-07-2003, 04:53   #7 (permalink)
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Re: EF Airbox into EA 3.9L and stnd manifold

nice work there Dellboy, thanks for taking the time to take some pics and post them up. Theres been a bit of talk about this mod, but until now, no pics.
Have you noticed any difference in throtte response?
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Old 07-07-2003, 05:02   #8 (permalink)
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Re: EF Airbox into EA 3.9L and stnd manifold

Well actually yes I have, it just feels more responsive and free (best word I can think of).

It just feels right, and better acceleration, based on the seat of the pants testing.

More power ? well hard to say, maybe some, without a dyno test can't say to much :0)

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Old 07-07-2003, 06:24   #9 (permalink)
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Re: EF Airbox into EA 3.9L and stnd manifold

Anyone else got any comments :0)

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Old 07-07-2003, 06:50   #10 (permalink)
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Re: EF Airbox into EA 3.9L and stnd manifold

Looks like you went to a lot of trouble Dellboy. I can't see much benefit from that setup though. Fair enough the box is bigger, but there it isn't that much better in my eyes.

Nice work though Very neat.

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