Hot vs Cold Dyno Pulls - Stock ZL1 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

jlpearl · 09-07-2015, 07:26 AM

Hey all, I've started working with a buddy who owns a dyno shop in central NH. He has worked on many types of vehicles but is a real genius with Mustangs.

Anyways, I purchased a 2013 ZL1 M6 in June and will be performing some mods and tuning. I'll do my best to pull some interesting data to share here. First round of data is a quick shot comparing a dyno run hot from the street and then after sitting for 45+ minutes with fans blowing to cool it down. 29whp and 22wtq differential for a hot motor versus a cooled motor.

Def need to keep temp, especially IAT2, in mind when comparing dyno pulls or before making runs at the track!

newagemuscle · 09-07-2015, 07:53 AM

That makes me feel better about what my tuner told me the last time I was in for a re-tune. I came in hot off the street and was on the dyno for 2 hours with very minimal cool down. In the and he told me due to heat soak probably off by about 15 horsepower. Based on what you are showing me I believe it.

DrkPhx · 09-07-2015, 02:51 PM

I saw the same thing when I dyno'd my car bone stock. Not only does it pull timing when hot, but Cat Over Temp usually kicks in and drops the commanded AFR to 10.45.

09-07-2015, 07:26 AM	#1
jlpearl Performance-Dyno.com Drives: 2013 Camaro ZL1 Join Date: Mar 2010 Location: Loudon, NH Posts: 57	Hot vs Cold Dyno Pulls - Stock ZL1 Hey all, I've started working with a buddy who owns a dyno shop in central NH. He has worked on many types of vehicles but is a real genius with Mustangs. Anyways, I purchased a 2013 ZL1 M6 in June and will be performing some mods and tuning. I'll do my best to pull some interesting data to share here. First round of data is a quick shot comparing a dyno run hot from the street and then after sitting for 45+ minutes with fans blowing to cool it down. 29whp and 22wtq differential for a hot motor versus a cooled motor. Def need to keep temp, especially IAT2, in mind when comparing dyno pulls or before making runs at the track! __________________ 2013 Camaro ZL1 - 10% pulley, roto-fab, tune 575 rwhp street temps, 604rwhp glory pull tuned by me at Performance-Dyno.com

09-07-2015, 07:53 AM	#2
newagemuscle Philippians 4:13 Drives: SLP Supercharged LS3 Join Date: Aug 2009 Location: The Motor City - Michigan Posts: 2,902 View My Garage	That makes me feel better about what my tuner told me the last time I was in for a re-tune. I came in hot off the street and was on the dyno for 2 hours with very minimal cool down. In the and he told me due to heat soak probably off by about 15 horsepower. Based on what you are showing me I believe it. __________________

09-07-2015, 02:51 PM	#3
DrkPhx Drives: 2013 Triple Black ZL1 / 2006 TB SS Join Date: Feb 2011 Location: MN Posts: 2,250	I saw the same thing when I dyno'd my car bone stock. Not only does it pull timing when hot, but Cat Over Temp usually kicks in and drops the commanded AFR to 10.45.