Just want a little feedback on my dyno pull - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Ret Grunt21 · 07-28-2018, 01:22 AM

So I finished my LS3 swap after my L99 blew. So I went with a true LS3, swapped in a Comp 296hr cam, Comp 26918 springs and chromoly pushrods, cold air intake, long tube headers, ZL1 mid with no cats and Corsa mufflers. Got the dyno tune done by Ivan at Southwest Speed. Total power was 400 hp and 391 lbs ft of torque through the 6 spd auto at the wheels. The goal was great low end torque and 400hp. Ran the 1/4 today at Albuquerque Dragway and ran 13.34 at 106 mph with a 2.0 60ft on Nitto Invos at 33 psi. Keep in mind that’s at 5600 ft in elevation and DA was at 7200 ft. With at 20 mph headwind. I was pretty happy with that. Your thoughts?

zr1chris · 07-28-2018, 08:48 AM

Seems a bit slow even for stock but like you said you do have a couple things working against you with the heavy head wind and elevation. The power number looks a bit low too though. I would have expected that with your mods minus the cam.

christianchevell · 07-28-2018, 09:21 AM

If you cut the 60 better came down to sea level and put a converter in it you should be low 12s IMO, your torques up on the dyno and that's more important than the HP. I would expect a little better dyno numbers but the specs on your cam the tune everything matters so much....especially the weather station.

A good thing to look into would be the converter to get it down to the ground earlier, many races are made in the first 60' and some nice trailing arms and toes to help avoid wheel hop and better transfer..... Just a couple thoughts. Lord knows any dyno is just a tuning comparison machine, its adjustments can be dead on to match up to a load bearing mustang dyno or close or not at all. And tuning matters so much from there I would wonder where's the AFR? as screen shots aren't as complete as a person would like and thus print outs, wonder if its tuned right not pulling timing and maximizing the torque curve which looks pretty good compared to stock and that's what moves you.

Headwinds suck, altitude sucks..less power to the engine due to lean air conditions, so your doing good IMO but everything is usually always a work in progress for a old hotrodder..LOL

Ret Grunt21 · 07-28-2018, 09:43 AM

So just to clairify this dyno pull.... A/F was spot on and timing was perfect throughout the entire pull. Again elevation hurts out here and it was 102 degrees in the shop when we did the tuning. I’m also pushing through an automatic as well. So there goes quite a bit of HP as well. This car really isn’t for drag racing. I road course race more than anything. So the torque matters more to me coming off the apex.

InFiD3ViL · 07-28-2018, 02:14 PM

Just curious why you wouldn't stay L99 with VVT if management of the torque curve was so important to you.

07-28-2018, 01:22 AM	#1
Ret Grunt21 Drives: 2014 Camaro SS Join Date: Jun 2017 Location: Albuquerque NM Posts: 12	Just want a little feedback on my dyno pull So I finished my LS3 swap after my L99 blew. So I went with a true LS3, swapped in a Comp 296hr cam, Comp 26918 springs and chromoly pushrods, cold air intake, long tube headers, ZL1 mid with no cats and Corsa mufflers. Got the dyno tune done by Ivan at Southwest Speed. Total power was 400 hp and 391 lbs ft of torque through the 6 spd auto at the wheels. The goal was great low end torque and 400hp. Ran the 1/4 today at Albuquerque Dragway and ran 13.34 at 106 mph with a 2.0 60ft on Nitto Invos at 33 psi. Keep in mind that’s at 5600 ft in elevation and DA was at 7200 ft. With at 20 mph headwind. I was pretty happy with that. Your thoughts? Attached Images __________________ 2014 Camaro SS- Full L99 to LS3 swap with auto trans. Comp 296 HR cam, Comp springs and retainers and Comp chromoly pushrods. CAI, DNA Motorsport Longtube Headers, cat delete, ZL1 mid pipe, Corsa Mufflers, All L99 VVT and DoD deleted. Dyno tuned at Southwest Speed Rio Rancho NM. 400hp and 391 lbs ft of torque.

07-28-2018, 09:21 AM	#3
christianchevell old school chevy rodder Drives: 2021 zl1 a-10 WildCherry Join Date: Jul 2012 Location: Oregon Posts: 5,622 View My Garage	If you cut the 60 better came down to sea level and put a converter in it you should be low 12s IMO, your torques up on the dyno and that's more important than the HP. I would expect a little better dyno numbers but the specs on your cam the tune everything matters so much....especially the weather station. A good thing to look into would be the converter to get it down to the ground earlier, many races are made in the first 60' and some nice trailing arms and toes to help avoid wheel hop and better transfer..... Just a couple thoughts. Lord knows any dyno is just a tuning comparison machine, its adjustments can be dead on to match up to a load bearing mustang dyno or close or not at all. And tuning matters so much from there I would wonder where's the AFR? as screen shots aren't as complete as a person would like and thus print outs, wonder if its tuned right not pulling timing and maximizing the torque curve which looks pretty good compared to stock and that's what moves you. Headwinds suck, altitude sucks..less power to the engine due to lean air conditions, so your doing good IMO but everything is usually always a work in progress for a old hotrodder..LOL __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data,Red Carbon Interior, Nav, RotoFab Big Gulp , Elite x2ultra, Borla ATAK, Driveshaft shop, BMR susp, Speed covers, intercoolers, ATI , 2650 MAG, DSX lid, 103 NW, TSP Longtubes & cats, LPE, 1le mods, ,LME cover, Katech pump and chain, Trunnions, BTR stage 2, LPE boostapump, Gforce, Speed eng , Granetteli, etc etc

07-28-2018, 09:43 AM	#4
Ret Grunt21 Drives: 2014 Camaro SS Join Date: Jun 2017 Location: Albuquerque NM Posts: 12	So just to clairify this dyno pull.... A/F was spot on and timing was perfect throughout the entire pull. Again elevation hurts out here and it was 102 degrees in the shop when we did the tuning. I’m also pushing through an automatic as well. So there goes quite a bit of HP as well. This car really isn’t for drag racing. I road course race more than anything. So the torque matters more to me coming off the apex. __________________ 2014 Camaro SS- Full L99 to LS3 swap with auto trans. Comp 296 HR cam, Comp springs and retainers and Comp chromoly pushrods. CAI, DNA Motorsport Longtube Headers, cat delete, ZL1 mid pipe, Corsa Mufflers, All L99 VVT and DoD deleted. Dyno tuned at Southwest Speed Rio Rancho NM. 400hp and 391 lbs ft of torque.

07-28-2018, 02:14 PM	#5
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,735	Just curious why you wouldn't stay L99 with VVT if management of the torque curve was so important to you. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

07-28-2018, 08:48 AM	#2
zr1chris Drives: 2018 Camaro 1SS/1LE Join Date: Feb 2015 Location: Port Saint Lucie FL Posts: 1,224	Seems a bit slow even for stock but like you said you do have a couple things working against you with the heavy head wind and elevation. The power number looks a bit low too though. I would have expected that with your mods minus the cam.