97 Civic Intake DIY

[walleyworld]

I was looking at SRIs for my 97 civic as an inexpensive start to boosting my mileage. however i was wondering why pay 150$+ when the only part that seems to matter is the filter? i can go buy all of the "plumbing" at autozone and as far as im concerned, pipes are pipes. i was wondering if there was anyone that has done this before or knows what all ill need to accomplish this. Btw it's a 97 Civic Lx, all stock so far.

[Daox]

Installing a 'sri' will not increase your mileage. Look up warm air intakes or leave the stock system alone for best mileage.

[tanjulio]

try a cold air intake.

Custom Cold-Air Intake installation for the G1 Integra

[Daox]

A cold air intake may help increase mileage on a diesel engine, but not a gasoline engine.

[California98Civic]

Originally Posted by Daox

A cold air intake may help increase mileage on a diesel engine, but not a gasoline engine.

On a Civic of the age of ours, because of the intake manifold sensor type it uses (MAP not MAF), I agree a WAI will help FE modestly. Here were my test results with my WAI on my 1998 Civic. I totally see the value of just using PVC plumbing pipe. That is how I built mine for just a few bucks. Maybe Daox will correct me, but I thought nobody here had yet ABA tested a CAI to see what it might do. Still, I would agree with him that the CAI will probably not help for the simple reason that a CAI is supposed to add more dense air to the air/fuel mix and therefore get the ECU to increase fuel in the mix, no? If so, you would use more fuel and increase pumping losses, no? Anyway, a WAI is easy to build. Mine is black PVC pipe from the stock filter housing to a spot over the exhaust manifold (HOT air).

Good luck!

[tanjulio]

Originally Posted by California98Civic

On a Civic of the age of ours, because of the intake manifold sensor type it uses (MAP not MAF), I agree a WAI will help FE modestly....... Anyway, a WAI is easy to build. Mine is black PVC pipe from the stock filter housing to a spot over the exhaust manifold (HOT air).

Good luck!

I am Not arguing about Fuel Economy, I just want to warn you that I have read that PVC piping is TOXIC.

You could die from the fumes that the PVC will emit, thus I added the Link to show alternative way to Make an Intake Piping. I am not a Fuel expert; if Cold Air is better than Warm/Hot Air for Fuel economy.

but I do want you to be SAFE

[cbaber]

The stock airbox is very restrictive. A short ram intake will open it up a little bit and also bring in warm air from the engine bay which will increase FE. It also has another purpose if you have lean burn engine. On a lean burn the intake temps need to be around a certain number for it to engage so those drivers want warmer air intake temps.

But why buy the piping or filter in the first place? If all you need is warm air from the engine bay, why not just cut some holes in the current stock airbox? Cut the holes so that the air still has to pass through the filter to get into the intake, and make the holes point toward the engine. Maybe cut slots instead of round holes in order to keep unwanted objects from getting in.

This is what I plan on doing because its free and you keep the stock look and you can still buy oem air filters.

[California98Civic]

Originally Posted by cbaber

But why buy the piping or filter in the first place? If all you need is warm air from the engine bay, why not just cut some holes in the current stock airbox?

Holes in the airbox cannot be reversed, unlike an added tube. Cut into the box and you have permanently maimed the vehicle. And the air at the exhaust manifold is more quite a bit hotter than back by the airbox itself.

[racerc2000]

just thought ide toss this out there into the pool of information.

do research on your specific car before going with a SRI.

I know that with my specific car a SRI intake is out of question due to air turbulence at the MAF it will throw check engine codes.

I know someone will say it so... yes Ive seen chevys and other cars with a filter right on the maf what the diff is as to why it doesnt throw codes I dont know. but for hondas it seems to be an issue.

[drmiller100]

I've never seen a honda with a MAF. They all have MAPs.

for better mileage on a honda, inflate the tires up a bit, advance the timing a few degrees, and learn to drive better.