Does anyone that has switched to the Injen Intake feel as if there car is now slower than it was stock. I am kinda getting this feeling that the car has detuned itself to compensate for the increased airflow. Thanks for your help!

<P ID="edit"><FONT class="small"><EM>Edited by GIlovemycar on 05/23/03 10:32 AM.</EM></FONT></P>

 

Check this out from another post:

Re: Injen Technology - Infiniti G35 [re: TooFast4U]

TooFast4U (enthusiast )
05/19/03 08:20 AM

Thought people might be interested in an update. Injen finished testing my car last Wed/Thurs/Friday. They have fixed the stalling out at speed (80 mph +) when shifted into neutral. Also - they found that the system was actually making LESS power on the 6MT than the stock system - due to a volume issue with the pipe from the throttle body to the MAF. They have redesigned that pipe for increased volume and essentially tuned the entire system specifically for the 6MT. It should make as much or more power now than the automatic version. Because they ran out of time - they did not get to make a production version of the new system to install on my car and it will probably be late this week or next week before they can make one and install it. After that - they will test the car one more time to make sure everything is okay.

 

Read thru this guys thread bro. It's interesting and shed's some light on this issue.
READ THIS

<font color=green>GSM</font color=green>

 

Did you catch 'fatebender's' post in another thread bro? :
<blockquote><font class="small">In reply to:</font><hr>

The following is what Injen says if you contact them. Does the right hand know what the left hand does there? This is very sad.

"There are no changes to be made at this time. And we still find the G35 intake system to work fine with no problems. The problem which has been spread throughout the internet seems to be isolated. But there is a fix should you experience anything. The stock panels in the front bumper where the airfilter is located should not be removed. It can be modified slightly to fit the airfilter but do not remove it completely. This helps detour the incoming air from being forced into the intake stream causing any kind of turbulence. Installing this intake system should be fine, and should you experience any problems we stand behind our product and will offer any help or support to fix the issue asap.

Thank you for choosing Injen!"

Phillip
Injen Technology

<hr></blockquote>

<font color=green>GSM</font color=green>

 

I have read all of those post, the one problem that I am having is that mine is a automatic. Anyone have any other ideas?

 

Did you unplug the battery so that the ECU resets and knows you have a new modification?


It's still a G thang!!

 

I have reset it twice, and I also called injen and they really didn't have anything to say that was helpful. But I am going to remove it this weekend and put the stock one back on and go from there.

 

The problem is that the ECU senses the increased airflow and adjusts accordingly thus negating any benefit.(From what I've read on the previous threads). The ECU needs to be reprogramed to allow for increases in air flow and other performance tweaks. This is what 'chebosto' explained in his posts.

<font color=green>GSM</font color=green>

 

Wow, this is very different from what I would expect. You would think that the ECU would increase the fuel flow to maintain the correct mixture from idle up to redline. How does the ECU detect the increased air flow above the stock value and negate this higher airflow? Does this have to do with the electronic throttle feature (no throttle cable)?

Perhaps the ECU limits the butterfly opening to limit the air flow to the engine to a preset maximum. This would allow the engine to develop full power as the air filter became clogged, i.e. as the filter clogs, the butterfly opens more. Maybe this is a source for more power. Convert the electronic throttle to cable actuated and adjust the butterfly to be fully open when the throttle pedal is floored. Then the ECU might increase the fuel flow to maintain the correct mixture up to redline.

<font color=blue>Dan</font color=blue>

 

Wow, this is very different from what I would expect. You would think that the ECU would increase the fuel flow to maintain the correct mixture from idle up to redline irregardless of the airflow rate. How does the ECU detect the increased air flow above the stock value and negate this higher airflow? Does this have to do with the electronic throttle feature (no throttle cable)?

Perhaps the ECU limits the butterfly opening to limit the air flow to the engine to a preset maximum. This would allow the engine to develop full power as the air filter became clogged, i.e. as the filter clogs, the butterfly opens more. Maybe this is a source for more power. Convert the electronic throttle to cable actuated and adjust the butterfly to be fully open when the throttle pedal is floored. Then the ECU might increase the fuel flow to maintain the correct mixture up to redline.

<font color=blue>Dan</font color=blue>

 

They probably wanted to get the first G35 owners to buy their CAI.