Injen Intake Installed - question

[Zilli]

hey all,

i installed my injen intake today. Bug thumbs up and thanks to Yonas again. Very impressed with the product, everything you need is included. It sounds absolutely crazy, and i did feel that the car was a lot happier to get movingg, im sure its not a huge increase in power but it did feel really nice even at partial throttle openings

now for the question, it seems to be blowing more unburnt fuel, as the back bumper is covered in soot. I can only presume that this is a resultant of the comptuer over compensating due to the extra air getting pushed in. Am i correct with this?

The reason why i ask is because ive been running the car with no lid to the box for a while so i dont see the difference... or could it be the 5w30 Mobil 1 i put in today, bit thinner maybe?

any ideas?

[aaronng]

hey all,

i installed my injen intake today. Bug thumbs up and thanks to Yonas again. Very impressed with the product, everything you need is included. It sounds absolutely crazy, and i did feel that the car was a lot happier to get movingg, im sure its not a huge increase in power but it did feel really nice even at partial throttle openings

now for the question, it seems to be blowing more unburnt fuel, as the back bumper is covered in soot. I can only presume that this is a resultant of the comptuer over compensating due to the extra air getting pushed in. Am i correct with this?

The reason why i ask is because ive been running the car with no lid to the box for a while so i dont see the difference... or could it be the 5w30 Mobil 1 i put in today, bit thinner maybe?

any ideas?
Did you reset your ECU? I noticed that after resetting my ECU, my exhaust tip gets all sooty. After cleaning the tips and a few hard runs for the ECU to learn, the exhaust is not rich anymore.

[Zilli]

aha

yes i did reset it. Unfortunately i cant really drive much, until next thrusday when i get my license back....

i thought that the idle period of 15 minutes after the reset it would "learn itself"...

[aaronng]

aha

yes i did reset it. Unfortunately i cant really drive much, until next thrusday when i get my license back....

i thought that the idle period of 15 minutes after the reset it would "learn itself"...
That just relearns the idle (which you don't need to do since intake doesn't change the idle RPM).

But resetting the ECU sets it back to factory fuel mappings that are not adjusted yet, so you get it rich. It usually takes about 3-5 hard full throttle runs up to redline to get the fuel maps right. After that, your car should run relatively sootless.

[yourfather]

... i would've thought that you'd need more than full throttle launches to get your A/F ratios right.

Like, half throttle, then wot. but hey, you have 3 dots and I have one.

[aaronng]

... i would've thought that you'd need more than full throttle launches to get your A/F ratios right.

Like, half throttle, then wot. but hey, you have 3 dots and I have one.
When at medium rpm low to medium throttle, the air-fuel ratio is not as rich as when compared to WOT up to redline. That's why you get smoke/soot when you are giving it throttle and very little when you don't.

Anyway, when you are driving normally around, your ECU is already learning for light and medium throttle, even if you are not aware of it. Of course, medium throttle and high RPM would not be optimised yet, but then again, how many of us take it up to redline with light to medium throttle?

[yourfather]

yeah but still, the ECU has to learn af ratios depending on different load points.

you wouldn't want your tuner to completely tune your car for WOT the entire time.

[aaronng]

yeah but still, the ECU has to learn af ratios depending on different load points.

you wouldn't want your tuner to completely tune your car for WOT the entire time.
Zilli was referring to the stock ECU optimising the A/F ratio on its own. The ECU comes with the base maps for ALL throttle position, RPM and load. It then optimises itself on its own. There is nothing that your tuner can tune on a stock ECU unless you are loading a reflash in.

You're right that if you were tuning a piggyback or standalone from scratch, your tuner must tune for all throttle positions and all rpm.

[yourfather]

ok, well I figured that the ECU would take more than 3-5 runs on WOT to tune the entire fuel maps depending on throttle / load

[aaronng]

ok, well I figured that the ECU would take more than 3-5 runs on WOT to tune the entire fuel maps depending on throttle / load
The maps are already there. It's not starting from scratch. It's just fine tuning it. I was only referring to WOT with regards to Zilli's question as that is when there is most unburnt fuel coming out of the exhaust.

[yourfather]

amen to that . good intel then!

[panda[cRx]]

Unfortunately i cant really drive much, until next thrusday when i get my license back....

correction: YOU CAN'T DRIVE AT ALL :wave:

[Zilli]

heheheh

yeh not at all

then on thrusday it goes straight to the mechnic for organic clutch and today flywheel

WOO HOO