Odd dyno results

Eric10905 · 02-05-2021, 01:13 PM

Hi guys,

Dyno sheet attached doesn't show baseline, which looked typical and normal to others I've seen here.

The short is, I decided to have some dyno pulls to see the difference from stock to the current mods. Before I start the next round of mods. Just curiosity...

Same place, same dyno as stock baseline (but not same day - several months apart). Very different looking plot. Seems like it just flat lined after 4500. I regret that I wasn't thinking, and didn't have my computer or mpvi2 with me... so no log. First two pulls in sport, last in track.

I have a remote tune that pulls like crazy on the street. So, I don't think anything is wrong with the tune or performance. ?

Maybe the TB partially closed at that ~4500, but why? If operator didn't turn off TC or stabilitrac, could this result when car isn't actually moving?

Wondering if anyone every seen anything like this?

Thanks, be safe

*Joshinator99* · 02-05-2021, 05:53 PM

Need to datalog it and see if timing is being retarded and/or throttle closure. Torque management and Virtual Torque tables should be checked.

KingLT1 · 02-05-2021, 08:12 PM

^Agree

Eric10905 · 02-06-2021, 11:31 AM

Thanks guys, I might go run it again but with computer and mpvi2 this time just to do that. And share with tuner. :-)

*Joshinator99* · 02-06-2021, 04:26 PM

Quote:

Originally Posted by Eric10905

Thanks guys, I might go run it again but with computer and mpvi2 this time just to do that. And share with tuner. :-)

Definitely datalog your dyno and drag runs. I learn something every time (after KingLT1 schools me lol). That will give you an idea if Torque Management, spark knock, etc are pulling your power back on you.

Eric10905 · 02-08-2021, 01:42 PM

Quote:

Originally Posted by Joshinator99

Definitely datalog your dyno and drag runs. I learn something every time (after KingLT1 schools me lol). That will give you an idea if Torque Management, spark knock, etc are pulling your power back on you.

Yep, lesson learned here.

Maybe not a question y'all can answer.... like a dope i accidentally broke a connector on my wideband o2 sensor when i went to reinstall it this weekend. If i go run the dyno again, I wonder if the data log would be of same use if i don't have that in it? Or wait until I can get a new one?

02-05-2021, 01:13 PM	#1
Eric10905 Geezer_loves_Camaros Drives: 2018 2SS, Black, A8 Join Date: Dec 2018 Location: Austin Posts: 241	Odd dyno results Hi guys, Dyno sheet attached doesn't show baseline, which looked typical and normal to others I've seen here. The short is, I decided to have some dyno pulls to see the difference from stock to the current mods. Before I start the next round of mods. Just curiosity... Same place, same dyno as stock baseline (but not same day - several months apart). Very different looking plot. Seems like it just flat lined after 4500. I regret that I wasn't thinking, and didn't have my computer or mpvi2 with me... so no log. First two pulls in sport, last in track. I have a remote tune that pulls like crazy on the street. So, I don't think anything is wrong with the tune or performance. ? Maybe the TB partially closed at that ~4500, but why? If operator didn't turn off TC or stabilitrac, could this result when car isn't actually moving? Wondering if anyone every seen anything like this? Thanks, be safe Attached Images

02-05-2021, 05:53 PM	#2
Joshinator99 Moderator Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: New Ipswich NH Posts: 6,276	Need to datalog it and see if timing is being retarded and/or throttle closure. Torque management and Virtual Torque tables should be checked. __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)

02-05-2021, 08:12 PM	#3
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,583	^Agree __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

02-06-2021, 11:31 AM	#4
Eric10905 Geezer_loves_Camaros Drives: 2018 2SS, Black, A8 Join Date: Dec 2018 Location: Austin Posts: 241	Thanks guys, I might go run it again but with computer and mpvi2 this time just to do that. And share with tuner. :-)

User Name		Remember Me?
Password