GM performance air intake, no tune? Not so fast.....
07-24-2019, 02:03 PM
#21
Safety Car
Thread Starter
Cant see it here but are you logging the closed loop open loop PID?
You are probably in closed loop but often times if you are not above 190* engine coolant temp you wont go closed loop.
The only way to be sure is to log the PID.
Point is if you are using a cooler thermostat you may not go CL when you normally would anticipate.
You are probably in closed loop but often times if you are not above 190* engine coolant temp you wont go closed loop.
The only way to be sure is to log the PID.
Point is if you are using a cooler thermostat you may not go CL when you normally would anticipate.
Last edited by Internets_Ninja; 07-24-2019 at 02:07 PM.
07-24-2019, 02:08 PM
#22
Race Director
Member Since: Mar 2003
Location: Northern Illinois
Posts: 10,789
Received 888 Likes
on
553 Posts
Oldtimer
I had the dealer install the GM CAI on my '16 and ordered it as a factory option on my '19. Personally, I couldn't tell a "seat of the pants" difference on my '16.
07-24-2019, 02:35 PM
#23
Safety Car
Thread Starter
The car is already so fast that its near impossible to feel a small increase in power.
Last edited by Internets_Ninja; 07-24-2019 at 02:35 PM.
07-24-2019, 03:30 PM
#24
Thanks for the before/after. Even at $386 for the GM part, plus install labor by the dealer, it sounds like one of those "5%" deals; as in Z06 stock already has 95% of performance baked-in, that additional 5% is gonna cost you.
More power than i can use already,
Reduced fuel economy from too-rich fuel mixture
dealer won't spot me a dime more for it at trade-
In time.
Thank You!
More power than i can use already,
Reduced fuel economy from too-rich fuel mixture
dealer won't spot me a dime more for it at trade-
In time.
Thank You!
07-24-2019, 03:35 PM
#25
07-24-2019, 04:08 PM
#26
Safety Car
Thread Starter
Closed loop operating temp. The E92(Gen V) uses a time delay based on Engine Coolant temp and does not have a cutoff threshold. It then has an additional table for desired equivalence ratio during the short Open Loop operations but wants to be in closed loop as soon as possible. The only temp limit in place on the E92's is LTFT learning where Coolant Temp has to be above 102F. This strategy is far different than the days of the old Gen 3 ECU's.
07-24-2019, 05:04 PM
#27
Safety Car
All Stats from forum:
An 875 foot DA change = .1/1mph.
Horse Power:
-3.5% per each 1000 ft. above sea level.
-1% per each 10° Fahrenheit above 60°
07-24-2019, 09:23 PM
#28
Closed loop operating temp. The E92(Gen V) uses a time delay based on Engine Coolant temp and does not have a cutoff threshold. It then has an additional table for desired equivalence ratio during the short Open Loop operations but wants to be in closed loop as soon as possible. The only temp limit in place on the E92's is LTFT learning where Coolant Temp has to be above 102F. This strategy is far different than the days of the old Gen 3 ECU's.
In an effort to be helpful I answered from recall as I was without references.
For the record I am very familiar with the E92 as I have been tuning them since 2014.
I have also installed several CAI's (not the GM offering) on C7 Z06's and haven't had any go anywhere near 25% rich at idle.
I looked at few logs and after the CAI they idled with positive LT fuel trims by 3- 5% initially. (indicating slightly lean).
Hence my original suggestion that something else may have been out of order for your set up.
As I don't think it is normal to go 25% rich from the addition of any reputable CAI.
07-25-2019, 09:13 AM
#29
Safety Car
Thread Starter
You are correct I had forgotten GM changed the closed loop trigger in their torque based controllers.
In an effort to be helpful I answered from recall as I was without references.
For the record I am very familiar with the E92 as I have been tuning them since 2014.
I have also installed several CAI's (not the GM offering) on C7 Z06's and haven't had any go anywhere near 25% rich at idle.
I looked at few logs and after the CAI they idled with positive LT fuel trims by 3- 5% initially. (indicating slightly lean).
Hence my original suggestion that something else may have been out of order for your set up.
As I don't think it is normal to go 25% rich from the addition of any reputable CAI.
In an effort to be helpful I answered from recall as I was without references.
For the record I am very familiar with the E92 as I have been tuning them since 2014.
I have also installed several CAI's (not the GM offering) on C7 Z06's and haven't had any go anywhere near 25% rich at idle.
I looked at few logs and after the CAI they idled with positive LT fuel trims by 3- 5% initially. (indicating slightly lean).
Hence my original suggestion that something else may have been out of order for your set up.
As I don't think it is normal to go 25% rich from the addition of any reputable CAI.
Either way I hope that someone else tests out the intake and report their before and after data as well so that we can establish if this is out of the norm or not for the GM Performance Intake.