Zl1 1le dyno question

Tabester · 06-01-2019, 03:57 PM

What’s going on guys just took me 2018 zl1 1le with 1600 miles to the dyno. Cars stock with the exception of a air box mod with a k&N drop in. Car ran fine on the dyno however the torque numbers were extremely low, by looking at the graph the torque didn’t seem to go up at all just stayed flat throughout the pull. Anyone know why this could’ve occurred? Wheel spin? Strapped to tight? My error? Tech error? Dyno error? Anyone’s input would be awesome thanks.

SJFGTO · 06-01-2019, 05:11 PM

A torque curve should be mostly flat, that is optimal. But your torque numbers are unusually low. They do not appear to uniformly cross the HP curve at 5250 rpms as would be expected. Finally, the disparity between HP numbers between the three dyno runs is significantly off to me. Something was not right. What does the shop say?

Gunkk · 06-01-2019, 05:14 PM

The chart is in mph not rpm, and the Red line was definitely in a different, taller gear than the blue and green.

They should know better.

Tabester · 06-01-2019, 06:59 PM

Yes I pulled in 4th then he told me to pull it in 5th. They said their dyno is accurate and that’s what I was making, also they said it was hot. I told them there’s no way cars stock should’ve atleast broke 500, no way heat would take away 150 rwtq and the torque curve looked very flat to me. don’t care about numbers just put it on there cause it was free. Not worried about it just was curious for my own future knowledge as to why the torque curve didn’t look straight and continue to climb.

Junkyardspecial · 06-01-2019, 07:27 PM

Something is wrong with their dyno and it seems like they were using the wrong gears. I just recently dynoed mine in South Florida and while we didnt read the torque, I didnt do a pull anywhere close to 160mph.

Tabester · 06-01-2019, 11:10 PM

Quote:

Originally Posted by Junkyardspecial

Something is wrong with their dyno and it seems like they were using the wrong gears. I just recently dynoed mine in South Florida and while we didnt read the torque, I didnt do a pull anywhere close to 160mph.

Yea I know it was Defiently strange to me that’s why I ask to put it on here to get some answers. There’s another forum member who put my old lt4 blower on his fbo 17 1le and his first pull was 435rwhp and his last was 480 his graph did look good. Mine however looked very off. Still don’t understand how the hp curve looked good but the torque curve or should I say line looked very off. Thanks
To everyone who responded I really appreciate your input guys.

speedraider · 06-01-2019, 11:22 PM

If I was still in Florida, I would take it to Redline in Pompano and talk to Howard.

06-01-2019, 03:57 PM	#1
Tabester Drives: 18 Camaro Zl1 1LE 06 Pontiac GTO Join Date: Mar 2018 Location: Miami Posts: 40	Zl1 1le dyno question What’s going on guys just took me 2018 zl1 1le with 1600 miles to the dyno. Cars stock with the exception of a air box mod with a k&N drop in. Car ran fine on the dyno however the torque numbers were extremely low, by looking at the graph the torque didn’t seem to go up at all just stayed flat throughout the pull. Anyone know why this could’ve occurred? Wheel spin? Strapped to tight? My error? Tech error? Dyno error? Anyone’s input would be awesome thanks. Attached Images __________________ 2018 SS 1LE TOTALED @E60 629rwhp 644rwtq sae. 2018 ZL1 1LE 571rwhp 554rwtq sae g

06-01-2019, 05:11 PM	#2
SJFGTO Oh Oh it's Friday Night! Drives: 2018 ZL1 1LE Nightfall Gray Join Date: Jan 2018 Location: Walton Woods Posts: 1,073	A torque curve should be mostly flat, that is optimal. But your torque numbers are unusually low. They do not appear to uniformly cross the HP curve at 5250 rpms as would be expected. Finally, the disparity between HP numbers between the three dyno runs is significantly off to me. Something was not right. What does the shop say? __________________ 2018 Camaro ZL1 1LE NFG; ARH 2” headers, catless mids, ARH full exhaust, Lingenfelter 18% lower pulley, ATI Harmonic Balancer, Roto-fab CAI, EE-catch can, TM ported TB, NX Lid, BMR strut tower brace. Aeroforce dual pod interceptor gauges. Tuned by Vengeance Racing!!! 644 HP @ 6250 rpm / 689 trq @ 3660 rpm Four that wanna own me Two that wanna stone me One says she's a friend of mine...

06-01-2019, 06:59 PM	#4
Tabester Drives: 18 Camaro Zl1 1LE 06 Pontiac GTO Join Date: Mar 2018 Location: Miami Posts: 40	Yes I pulled in 4th then he told me to pull it in 5th. They said their dyno is accurate and that’s what I was making, also they said it was hot. I told them there’s no way cars stock should’ve atleast broke 500, no way heat would take away 150 rwtq and the torque curve looked very flat to me. don’t care about numbers just put it on there cause it was free. Not worried about it just was curious for my own future knowledge as to why the torque curve didn’t look straight and continue to climb. __________________ 2018 SS 1LE TOTALED @E60 629rwhp 644rwtq sae. 2018 ZL1 1LE 571rwhp 554rwtq sae g

06-01-2019, 05:14 PM	#3
Gunkk Thank you Al Oppenheiser! Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017 Location: Sarasota, FL Posts: 5,156 View My Garage	The chart is in mph not rpm, and the Red line was definitely in a different, taller gear than the blue and green. They should know better.

06-01-2019, 07:27 PM	#5
Junkyardspecial Drives: 2018 ZL1 1LE Join Date: May 2019 Location: South Florida Posts: 438	Something is wrong with their dyno and it seems like they were using the wrong gears. I just recently dynoed mine in South Florida and while we didnt read the torque, I didnt do a pull anywhere close to 160mph.

06-01-2019, 11:22 PM	#7
speedraider Drives: 2016 Z06, 2017 ZL1 Join Date: Feb 2012 Location: Las Vegas Posts: 305	If I was still in Florida, I would take it to Redline in Pompano and talk to Howard.

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