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4 cyl. Cold air intake by Oslo
Started on: 10-04-2002 02:45 AM
Replies: 8
Last post by: Standard on 10-05-2002 05:11 AM
Oslo
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Report this Post10-04-2002 02:45 AM Click Here to See the Profile for OsloClick Here to visit Oslo's HomePageSend a Private Message to OsloDirect Link to This Post
I was wondering if it would be a benefitial idea to go ahead and install a cold air intake on my 2.5l fiero.

I've never heard of anyone doing a cold air intake on their 4 banger, but why not??

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Standard
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Report this Post10-04-2002 02:47 AM Click Here to See the Profile for StandardClick Here to visit Standard's HomePageSend a Private Message to StandardDirect Link to This Post
Well, you already have a cold air intake.. stock. The only reason to go to a cone filter 'cai' is if you do an engine swap, really.. or if you just like the looks. Until you get into a 3.4 TDC, or 3800 or v8 of any kind, the stock airbox flows more than enough to keep up.

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Philphine
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Report this Post10-04-2002 08:24 AM Click Here to See the Profile for PhilphineSend a Private Message to PhilphineDirect Link to This Post
i did one but i can't get pip or search to work at the moment (problem on my end). i really did it to work out the idea for a future engine change but it's set up on it now.

do a search in the general chat section for "functional indy scoop".

edit. ain't reboots great?
https://www.fiero.nl/forum/Forum1/HTML/021087.html

[This message has been edited by Philphine (edited 10-04-2002).]

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AgentD
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Report this Post10-04-2002 11:40 AM Click Here to See the Profile for AgentDSend a Private Message to AgentDDirect Link to This Post
I do believe it would be benificial as my 84 wont get above 4000rpms in 4th gear(thats about 90-95 mph) so i would think if you gave it more air it could pull all the way to 5000rpms. let me know how the cold air intake works. i also heard the water trap restricts a lot of air in the 4banger
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Blacktree
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Report this Post10-04-2002 06:09 PM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageSend a Private Message to BlacktreeDirect Link to This Post
The stock intake IS a cold air intake. It just doesn't have the shiney chrome and the cool looking cone filter.

Several people have reported that aftermarket cold air intakes do almost nothing to improve power for the 2.8 V6, so I'm sure the 2.5 4-cyl shouldn't be any different. Boring the throttle body and porting the intake manifold should give you alot more power increase than an aftermarket cold air intake.

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30+mpg
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Report this Post10-04-2002 09:04 PM Click Here to See the Profile for 30+mpgSend a Private Message to 30+mpgDirect Link to This Post
Remove the screw holding the grill in place below the gas cap door. Fabricate a metal plate to fit where the grill did. Cut a hole in it and install a flange to allow you to mount a cone filter.

Presto! Not only do you now have a "cold air intake" but you also have a cone filter that everyone, and I do mean everyone, can see.

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DonHager
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Report this Post10-04-2002 10:32 PM Click Here to See the Profile for DonHagerSend a Private Message to DonHagerDirect Link to This Post
Tried it on my L4 that has a cam, larger throttle body and headers. I gained nothing and went back to stock air box. I stand corrected. I did gain alot of noise (air).
I have 5 speed in mine it pulls until the computer rev limiter kicks in and I am well over 120MPH by then.

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[This message has been edited by DonHager (edited 10-05-2002).]

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AgentD
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Report this Post10-05-2002 04:01 AM Click Here to See the Profile for AgentDSend a Private Message to AgentDDirect Link to This Post
Lets try not to mix apples with oranges hear the v6 has a diffrent air cleaner assembly then the 4banger. for the sake of us idiotic 4banger owners lets keep all data to the 4bangers only. the real reason for this is true its a cold air intake but it also takes from the exhaust on the front(front of car) side of the enigen and air cleaner. i think(havent tryed yet) it would add some air flow if you added straight piping with a less restricive filter. and i am not just talking redesign the "ACA"(Air Cleaner Assembly) im talking for a cold air intake take the hole thing out of the car and install new from the vent straight to the filter to the throttlebody.
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Standard
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Report this Post10-05-2002 05:11 AM Click Here to See the Profile for StandardClick Here to visit Standard's HomePageSend a Private Message to StandardDirect Link to This Post
The only things you will gain is an empty wallet, and more noise. The stock airbox flows more than good enough for the pushrod 2.5.. it's fine until you get into 3.4 TDC territory.

The water trap doesn't restrict at all. That little hole you see at the bottom is actually for water to drain out, the air flows up and over that plate.

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