Hey all,

I volunteered my '99 ES to have a prototype Injen Racing Division Cold Air Intake installed and tested on my car. I also got to keep the intake and they provided a rental car! Thanks Injen!!

They put the car on a dyno and the results are quite different than the one's posted for the AEM intake.

Horsepower at the wheels (stock): 102.8
Horsepower at the wheels (Injen): 107.8

Torque at the wheels (stock): 105.0
Torque at the wheels (Injen): 111.2

I was very impressed with the results. The power increases are all throughout the rpm range, not criss-crossing like some intakes. There is quite a noticeable difference behind the wheel. Yes, there is a bit more pull from the engine, but throttle response is instant now. The engine seems so much happier now. It pulls hard right up to redline and I have to adjust my shifting sooner before redline because it hits the limiter quicker now.

I have also noticed a decent gain in fuel mileage (it was a couple hours drive to the shop). Also, during idle and cruise, engine noise and drone is practically nonexistant. Driving at 80mph is no longer agony.

The sound from this intake is amazing. A low, powerful whoosh under mid to hard acceleration. It has already turned heads from other modded cars on the road. The system looks terrific- polished with bright red connectors.

Even though I didn't pay for the system, I think it's a great deal. Sure, the power increase isn't huge, but the increased response, better mileage, quieter cruise, and terrific sound is an added bonus.

Here are the results, and pics of the old stock intake and new intake installed.






Can you believe the air had to pass through all that!!

-Jerry

 

People with 2 liter engine who have dynoed their cars have 98-102 hp at the wheels. Wouldnt it make sense that the 1.8 liter which has a smaller displacement and is the older engine have less hp? Am I missing something?

 

right on... thanks for posting the dyno charts. i'm glad someone from the board was able to get in on that testing for the prototype. :] good job on gettin in there and helpin em make another product for the protege's, and good score on the free intake

 

I don't know. I considered upgrading to the 2.0L. But, when I test drove the car, I found sluggish compared to my 1.8L. I know that 2001+ Protege sedans are heavier, but they also have more power. The '99s posted the best 0-60 times I've seen in the magazines (8.4 seconds, November 1998 Car and Driver). Typically, I see 8.9 seconds 0-60 for the 2.0L.

Maybe there's something we're all missing. Perhaps the larger wheels and brakes on the 2.0L's? I was surprised when I saw the results, but they match my experience with the cars (I sold Mazda's up until a year ago). However, Injen said a 15% reduction in power from the crank to wheels is typical for a 5-spd manual FWD tranny. Take away 15% from the 120hp crank rating of the 1.8L and you get 102hp. Almost spot on...

BTW, they told me that the Subaru WRX's AWD drivetrain is highly inefficient. They only produce 170hp at the wheels... that's a 57 hp decrease (25%)!

-Jerry

 

Can't see the pics. All it says is "Your are trying tot access an image outside of imagestation.com."

No pics...

 

Thanks...Looks nice.

I'm kind of confused though, didn't Injen already have an intake for this car, or did they just want to dyno it??

 

Injen did not have an intake for the 1.8L yet. This is the test bench one. Looks nice btw.

Raptor

 

Hey Raptor,
This is kind of on topic/off topic...
I noticed in your signature that you've got an AEM short ram intake. I was curious how much you paid (if you don't mind my asking)? I just checked at a local place here and they want $343 for the AEM short ram!

Jerry,
I am totally jealous! Enjoy your CAI!! Did they say how much the Injen 1.8 L CAI would cost retail?

 

actually, 25% isn't bad. most AWD drivetrains lose 25-29%


congrats on the injen intake. nice gains.

 

Does the Injen intake use a foam filter, paper filter or a washable K&N-type cotton gauze filter?

Nice gains, but I don't trust foam filters and I love washable, reusable filters. Also, how much will the Injen intake cost?

 

Nice post.

I would also be interested in some retail prices for the Injeg CAI.

 

it uses a washable K&N type cone filter.

 

The Injen CAI for the 1.8L is almost exactly the same CAI for the 2.0L motors. I guess the price will be the same at $320 (ouch!). They are debating whether to put a different model number, or the same. They did say they had to mount the coolant resevoir and a wiring/vacuum hose bracket in different places compared to the 2.0L.

I am not sure what the filter is made from (it is hidden in the bumper/wheel well area). Looking from the pics on Injen's website, it appears to be a cotton gauze (or like material) sandwiched between steel mesh. According in Injen, their filters outperform every other filter out there and they back it up with a test performed by Jackson Racing.

I have to check Injen's brochure for more information. I may have one in the car, but I definitely have one on my desk at home. I'll run down and check in a bit and I'll post anything I find.

Here's a cutaway pic of the filter:



-Jerry

 

I believe I saw some articles in SCC saying that the WRX drive train was even more inneficient than 25%. They dynoed it at like 155-160HP. That is terrible, but you got a lot more drivetrain bits there.

 

I had an Injen brochure in the car. It wasn't really much help. It says they are cotton and utilize a four-ply design. They are designed and engineered by Injen though. The velocity stack they talk about is just a lip in the urethane rubber molding which fits over the edge of the tubing to increase airflow. They use urethane rubber because it distorts less than other rubbers.

Does anyone know a decent graphic hosting website out there? I was just linking pictures from my Yahoo! Protege Club photo folder, but they seem to change the addresses every couple of days. I moved to Sony's Imagestation last night and it worked last night. However, now it seems it doesn't. Anyone?

Here's a link to my album on imagestation. It has pics of my car, the dyno results, and the old and new intakes. I hope this works...

http://www.imagestation.com/album/?id=4291814421

-Jerry