09 Cobalt XFE
What can be said about my numbers?
you can see this is run#2, run 1 was 138hp, and run 3 was 125hp. WTF?

 

138WHP is rather high.....

 

how is it high when it's supposed to have 155hp @ crank

 

sounds about right are you a 5 speed or auto

 

5 speed!

 

its because your license plate is upside down

 

You were getting heatsoaked after the first run...not exactly new news

 

Sounds about right.

 

normally you lose about 10-15% if your manual and 15-20% if your automatic i think im not 100% sure but a baseline L61 rated at 145hp crank 5 speed normaly dynos 133hp

 

check your fuses!your HP fuse must be blown

 

time to remove it then

already did, no luck couldnt find it
i figured, going to have to do something about better cooling.

 

was going to see if that cool additive for radiator helped.
and i was going to do the intake baffle removal.

 

ive tried Redline's water wetter in my car and after a whole bottle it only dropped a degree or 2 of highway driving its more effective on people running straight water in there cooling system

 

but running straight water and WW dont give you any antifreeze protection

 

no you would only do it in a race car or only run it in the summer then switch back before it gets cold

 

good point, but i'd hate bleeding the air out everytime

 

Some new numbers
Last #'s were @ 5k miles
These are @ 23k miles.
Only changes since then are tint, battery, oil change.
run 1 on the graph is from original dyno.
**Time for tune** as you can see my AFRs are going crazy rich for N/A past 4.5k rpm
compared to last time & it being OEM tune.

 

IS that dip in the AFR due to PE Delay?

A tune is gonna net you a lot of horsepower throughout the RPM range.

 

whats PE?

 

Power Enrichment. Look at the AFR.

When the car is at full throttle for more then a few seconds, it adds more fuel to try and increase the power and help protect the engine.

It also saves gas by not using so much for the first few seconds.

When you get tuned most will turn off PE delay so that you will have richer AFR every time you go full throttle.

 

I dont know, wont until my tuner hooks up to the ECU to tune it.

Just from his exp b4, he said it was probably doing it b/c the ECU went into closed loop mode

 

PE delay is always present in a stock Cobalt.

What you have going on is exactly normal.

 

it thats normal then its stupid. going 10:1 afr on an N/A engine!

and if you look at 1st post the afr curve is a bit different and that didnt dip under 12:1 afr

 

numbers seem fine.

 

It looks lke its only going to 11:1 to me, but that aside, this is perfectly normal. Its a failsafe, its so you dont grenade the engine running lean at high load/high rpm