Yep, thats right. Made ~1hp, lost ~8lbs torque. Wierd huh?

Below is a dyno graph of my current dyno, and the dyno I did back in april.

Todays parts that were different from last dyno (everything else was the same):
m2b4 transmission
ESP Header

Last Dynos parts:
Skunk 2 manifold
walbro 255
chrome tuning
stock header
m2a4 transmission

Blue = previous dyno
red = current

Thoughts?

 

did you tune it again?

your AFR's are all over the place

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TylerC161 &raquo;</TD></TR><TR><TD CLASS="quote">Yep, thats right. Made ~1hp, lost ~8lbs torque. Wierd huh?

Below is a dyno graph of my current dyno, and the dyno I did back in april.

Todays parts that were different from last dyno (everything else was the same):
m2b4 transmission
ESP Header

Last Dynos parts:
Skunk 2 manifold
walbro 255
chrome tuning
stock header
m2a4 transmission

Blue = previous dyno
red = current

Thoughts?
</TD></TR></TABLE>

Besides they suck?! What happened to the 20whp they picked up from their test car?! Your previous TQ number seemed very high anyway. 160+ with No cams? Not realistic.
I'd be pissed if I were you.......One day people will take my advice and just buy a VIBRANT for ~$500. I have proven it twice.....it makes power!
That dyno is horseshit now....The peak isn't even the worst of it.....Keep us posted!
Vibrant
Camp1320
ESP

 

The header was free to me, so it makes no difference in my wallet. Though had I bought it, yes, I would of been upset though.

ALTHOUGH, for what its worth, I heard today from somone else in the shop the dyno was reading low lately. Apparently a bunch of Cobalt SS guys came up and were making lower amounts then expected numbers. Its likely the dyno needs recalibration one of the dudes said.

And for the LAST time, 163tq is what I made, believe it or not

 

Do you have the old header?

 

Do a back to back comparo and then we'll be sure....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">Do a back to back comparo and then we'll be sure....</TD></TR></TABLE>

and compare air fuel ratios. 7 months between dynos one with the wideband one without with several different variables at the same time is not very scientific.

Different oil can make you lose power.
Different wheels/tires/air pressure can make you lose power.
Different tension of the dyno's tethers can make you lose power.
7 months of driving on an uncleaned air filter can make you lose power.
Different transaxle fluid temperatures make you lose power.
Different engine oil temperatures can make you lose power.
Differences in engine oil viscosity (higher mileage than before) can make you lose power.
Different engine coolant temperatures can make you lose power.
Different degrees of heat soak in the engine bay can make you lose power.
et cetera

You need to try to account for as many variables as you can. That's why back-to-back dynos are prefered.

 

...

 

why is the AFR chart so inconsistent with your previous dyno?

regardless of the 7 months, it looks like you gained a good bit of power at the vtec crossover and your peak power goes a bit further into the RPM

tell your tuner to shoot for 13.3-13.6 afr, unless of for some reason your motor likes to run on the richer side...

 

wow. looked like a sucky tuning job

are the new ones new or used?

 

I'll be going S300 here in a while, I'll have it tuned more then. We were slightly pressed for time today on the dyno, so its a quick mock up tune from our baseline which made like 160hp and 140tq

 

interesting

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TylerC161 &raquo;</TD></TR><TR><TD CLASS="quote">I'll be going S300 here in a while, I'll have it tuned more then. We were slightly pressed for time today on the dyno, so its a quick mock up tune from our baseline which made like 160hp and 140tq</TD></TR></TABLE>

well i hope the AFR looks better than the previous dyno. It honestly looks like a basemap.