Scrming's Injen Intake - Install and Info

[ROD1]

Good that things are looking in favor for the Injen! Scrm da man! BTW better take the Mrs. to a nice outing today. We dont want to lose ya?

[Mankind]

Originally Posted by spoone123

WTF i get 17 avg Mpg city with my airaid. >.> hate you.

WOW!! I have never gotten this bad of milage no matter how i drove it. You must sit in some serious traffic.

[esperman]

wow. still planning to rip this back off to test Airaid?

[scrming]

Originally Posted by esperman

wow. still planning to rip this back off to test Airaid?

Yeah... may be a bit before I get to it... but I think the more info we can get on things the better!

[scrming]

So this thing is in fact a TRUE CAI!

Driving the IAT runs about 5 degrees above the ambient temp on the Radio. I stopped and ran into a store for about 10 minutes. The IAT climbed by 30 degrees. No surprise there! What shocked me was as I started the car the IAT temp dropped by 20 degrees in a matter of seconds! WOW! Behavior way different than stock! Pull out on to the street and drive at 20 MPH for maybe a couple 100 feet and the IAT has now completely recovered!!!! I was simply amazed how quickly recovered... now granted it's only 40 degrees right now... but still was impressed...


More to come... have some other data I need to review..

[calflan]

What's removal of the filter going to be like, when filter cleaning required ?

[mrray13]

Originally Posted by calflan

What's removal of the filter going to be like, when filter cleaning required ?

Not too bad really. Jack the car up, un bolt and remove. worse case, just unbolt the whole CAI.

[TJ91]

Originally Posted by scrming

So this thing is in fact a TRUE CAI!

Driving the IAT runs about 5 degrees above the ambient temp on the Radio. I stopped and ran into a store for about 10 minutes. The IAT climbed by 30 degrees. No surprise there! What shocked me was as I started the car the IAT temp dropped by 20 degrees in a matter of seconds! WOW! Behavior way different than stock! Pull out on to the street and drive at 20 MPH for maybe a couple 100 feet and the IAT has now completely recovered!!!! I was simply amazed how quickly recovered... now granted it's only 40 degrees right now... but still was impressed...


More to come... have some other data I need to review..

This was what i was waiting to hear

[scrming]

Originally Posted by mrray13

I don't have pics yet, but I went ahead and got mine installed tonight as well. It's definitely 90 minutes or more, lol. The filter shouldn't be too bad to get too, with a jack under the car. The filter looks pretty decently protected under there too.

I did go ahead and drill a hole for my IAT. I'll post a pic of it tomorrow. Tube is drilled rather easily with a UniBit. Only trouble I had was the tube sliding into the elbow. That was a pain in the ass, lol!!

I love the sound. Throttle response feels better, although I won't make a comment on any real gains. I'll let the dyno do that. It was wet here too, so no real hard runs done. Hopefully the track won't be rained out tomorrow.

Guess I should clarify... 90 minutes on a hoist with air tools! Could easily be 2 to 3 hours in the driveway...

Also, yes, the elbow was a PITA... Once we got it on found you couldn't easily rotate the tube in the elbow.... put a little bit of grease on the tube... problem solved!

[scrming]

Time for the initial data...

First thing.. Long Term Fuel Trims. Driving around town the LTFTs will fluctuate a bit, but when cruising at a nice steady pace the LTFSs run between 0.0% and -1.6%. This is about what the stock intake was running, so it appears the MAF operating correctly and reporting the correct amount of air.. or at least very reasonably close.

Chart showing the LTFTs at 0.0% and -1.56% (sorry, hard to read... LTFTs are Red - 0.0% and Blue - -1.56%)




Next up.. Air Flow.. I logged the MAF frequency to show the amount of air flowing into the engine. The higher the frequency the more air...

I logged the stock and the Injen:

Stock:




Injen:



Now comparing graphs with the Dashhawk is a big PITA! So i graphed some data points myself... Now looking at things it appears the stock intake and the Injen flow about the same until around 5000 RPM... so I've only graphed the upper RPM range:



Looking at around 5800 or so, it appears that the Injen is flowing about 10% more air... assuming the MAF frequency is linear, which I do no know.

Finally, the O2 output when WOT (Open Loop). Looking at the previous graphs you can see with the Stock Intake the O2 sensors locked in at 905 mvolts and 900 mvolts at 6000 RPM. With the Injen intake both O2 sensors locked in at 900 mvolts. I did notice the O2s flucuated a bit in the lower RPMs around 4700 RPM but nothing I would call way out of line, with one O2 a bit richer at 925 mvolts and one a bit leaner at 895 mvolts..


So the data to me seems to indicate that then Injen is supplying more air while maintaining proper MAF functionality. Now, what I can't answer at this point is the performance. However if you go back and look at Injen's dyno sheet you'll notice that the Injen performs pretty close to stock until about 4800 RPM which lines up pretty well with my data... So the potential for gains seem to be there... just need to see some dyno results!

[wer2foxs]

To help me understand and in lehmans term you would not see a difference of HP until high end? This is probably why others did not see a difference during normal driving conditions?

[spoone123]

so far injen shows some promises. Scrming are you going to do one with Airaid?

[dagolfguy]

This is probably a dumb question.
Why would an engine flow a different mass of air at the same RPM (with a different intake)?
Does anyone know which type of MAF this engine uses? I was thinking that it is probably a hot wire type, but it also could be a coldwire type.
I'm thinking that you'd want to see the MAF read the same volume at the same RPM so that the computer puts the same amount of fuel in. I'm confused now.
(sorry).

[scrming]

Originally Posted by wer2foxs

To help me understand and in lehmans term you would not see a difference of HP until high end? This is probably why others did not see a difference during normal driving conditions?

Hard to really say... but yes, the data seems to suggest that the most benefit comes around 5000 RPM and above or so... That's where the extra HP really seems to pickup according to the Injen dyno...

Now one thing I noticed about the Injen sheet is the improvement in the low end torque.. Now I've only got on the throttle hard a few times, but didn't really feel any noticeable difference.. But after seeing how quickly the IAT now responds to the cold air... well that got me thinking... Look at the low end gains from the Injen:




now look at the gains I got with my IAT relocation:



Looks awfully close to me... So I'm thinking these low end gains in the Injen are due to the improved IAT response, not more air.... And the gains are very similar to my relocated IAT... so I'm thinking that why the perhaps I don't feel that low end improvement others feel... So from my casual observations the stock IAT responds very quickly in the Injen tube! Even though it is metal... And two things about that:

1) The stock MAF/IAT sensor is no longer sitting right over the radiator hose! I need to get a good picture showing the MAF location.

2) Yes, the Injen is a metal tube... but it very thin and I believe aluminum... my thought is it doesn't retain the head once cool air from outside the engine bay goes through... so it cools off very quickly... at least that's my opinion on that...

Also... I have to admit... I was WRONG! I was shocked when i took a good look at the stock MAF sensor... Every MAF sensor I have ever seen the IAT sensor is INSIDE the sensor housing! Well, you guessed it.. The stock IAT sensor is on the OUTSIDE of the dang sensor:



So the question now becomes if the stock IAT does in fact react very quickly (i'll have to get a video! LOL) then why is it so slow to react with the stock intake? Like I said it can take a couple of miles at 70 MPH for the IAT to recover... Couple of thoughts on that:

1) The stock snorkel location simply is not as good as we thought. Perhaps there is not nearly as much fresh air coming in from that location as I thought

2) The stock intake tube and stock air box actually hold in heat once they are heated up... perhaps things just don't cool down very quickly... by relocating my IAT to the far side of the box/tube m IAT wasn't exposed to that heat...

3) Combination of 1 and 2...

So right now I don't plan on redoing my IAT relocation... That may change however once summer gets here...