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Old 07-30-2010, 11:46 PM   #1
93Bus
Scooby Newbie
 
Member#: 253530
Join Date: Jul 2010
Chapter/Region: RMIC
Location: Arvada, Colorado
Vehicle:
1993 Impreza
Aqua Frost

Default Which Cold Air Intake is the best for a 1.8L?

So i'm trying to milk as much power as i can out of the little 1.8 in my 93 impreza wagon. I know adding a CAI doesn't exactly mean that i'm gonna have instant power but my questions are ; will it add gas mileage and how much power will it add if any?
OR!
Is it just better to do an engine swap to a 2.2?
Thanks!
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Old 07-31-2010, 10:11 AM   #2
cmiovino
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Member#: 134005
Join Date: Dec 2006
Chapter/Region: MAIC
Location: Pittsburgh, PA
Vehicle:
2004 WRX Premium
PSM

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Better to swap the engine to a 2.2... but if you're going to do that, why not just go with the 2.5

Anywhoooo, the CAI is probably not best. You're really not going to any power down low, but up higher in the RPM range, you'll have a little more. Considering the 1.8 isn't powerful in the first place, I'd hate for you to loose power down low.

I mean, you could always just try it, but I wouldn't spend any $300 or something on a new Injen CAI. That would be a waste of money.
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Old 07-31-2010, 10:46 AM   #3
Jessekrs123
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Join Date: Jan 2010
Chapter/Region: NESIC
Location: Oakville CT
Vehicle:
2015 BRZ, 93 Legacy,
1984 BRAT

Default

You could remove the stock airbox, cut the MAF and fit a cone to it. $30, if you don't like it, get a coupler to refit the MAF to the box and put the stock box back on. You will not see a increase in gas mileage with a CAI, you might see less gas mileage because with the car getting more air, it needs more fuel to compensate. With the added air, you will see a noticeable increase in throttle response and your engine will sound a lot louder. Give it a try.
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Old 07-31-2010, 01:02 PM   #4
LetItSnow
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Join Date: Jun 2003
Chapter/Region: Tri-State
Location: Cicero, NY
Vehicle:
'10 &'12 Foresters
another Miata convert

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Any modifications to a 1.8L engine will be a waste of money. Don't do any bolt-ons.
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