Bogs hard when launching on drag radials ... Help - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

fukits1LE · 04-26-2014, 02:12 AM

When I launch the car instantly bogs hard like traction control is still on. I have 480hp to the ground so I should have more than enough power. It must be a tune issue. My tuner said all traction control is off. I don't know is its a knock sensor cutting the timing back or some kind of torque managment. It's A 2014 1LE with cam long tube headers air raid intake and pulled 483 on the dyno. I'm so bummed. I can launch between 3000-4500 with the drag radials at 30psi on an unpreped street and they just spin, once I put VHT down and air down the tires is when it all starts to go down hill. It has stock injectors and the tuner said they flow fine and it's not too lean nor is it running rich. The 1le has the ZL1 pump and an extra fuel pick up. Any ideas please. I'm going to put a 150 shot of nitrous on it after I get this issue resolved.

RobertRS · 04-26-2014, 02:26 AM

My money is on torque management through TCM that creates the dreaded low end throttle delay. It's one way that GM preserves their drivetrains. A good tuner can remove most of it but then you get on GM warranty bad boy list.

fukits1LE · 04-26-2014, 02:37 AM

Does the manual trans have any torque managment

jvoisel · 04-26-2014, 02:39 AM

Needs driver mod.

How are you trying to launch it?

fukits1LE · 04-26-2014, 02:53 AM

Quote:

Originally Posted by jvoisel

Needs driver mod.

How are you trying to launch it?

Wow that was fast, an egotistical response already. This is not my first manual car. It is one of the lowest hp cars I have had. I know how to launch I built (paid for) a 9sec 1968 camaro, 4 FI mustangs (paxton, vortech, kenne bell and a 250 shot nitrous car.

One of my concerns is the guy that tuned my car did all the work on it and I'm getting ready to have him build a twin turbo motor for it. If its a tuner issue I'm not going to have him do this build. I'm looking for ideas as to why the CAR is having an issue so I can give him some ideas or things to look for. The shop is a very good LS shop with many years of experience. Most of the cars he does is for street use and road racing. I don't know if anybody has had this issue but any constructive ideas would be appreciated.

servax · 04-26-2014, 03:01 AM

Are you sure your traction control is off completely (hold traction button for ~5 seconds)? Also try lowering your DRs to 24 PSI, at 30 PSI my traction control activates and the entire car bogs down.

I have Mickey Thompsons 305/35/20, and after a bit of trial and error I realized that these tires do NOT handle well on anything over 36 PSI hot.

fukits1LE · 04-26-2014, 03:06 AM

Quote:

Originally Posted by servax

Are you sure your traction control is off completely (hold traction button for ~5 seconds)? Also try lowering your DRs to 24 PSI, at 30 PSI my traction control activates and the entire car bogs down.

I have Mickey Thompsons 305/35/20, and after a bit of trial and error I realized that these tires do NOT handle well on anything over 36 PSI hot.

Yes I hold the button down to turn traction control off. When I have 30 psi the tires spin. When I air down between 19-24 and hear the tires and it hooks is when I have the problem.

servax · 04-26-2014, 04:20 AM

That's odd, it does sound like an tuning problem with your tune then - it shouldn't be bogging / cutting power if you have traction fully turned off.

fz4k98 · 04-26-2014, 11:36 PM

If it spins the tires with higher air pressure but bogs at lower, it may be too much traction for the power put out at lower rpm. With no tire slip the engine is being brought down to lower rpms and needs to recover.

I watched a guy show up with massive tires on his car and it would die at launch. His issue was the engine needed to stay up on rpm and the tires hooked too well. Some degree of tire spin is better than total hookup.

TxBandit911 · 04-27-2014, 12:17 AM

I used to drop my clutch at 5500-6k, with DR on it, had to or else it just did wanna go...

Tach it up pretty high once and drop it, just to rule out the easy stuff

McRat · 04-27-2014, 10:03 AM

Datalog - Pedal Position, throttle position.

This will tell you if torque management is still active.

Make sure you have turned off all stability control. The car might be applying the brakes.

Dfault · 04-27-2014, 10:25 AM

Here is an off subject question. If I don't upgrade any thing and just slap some 275 ET streets, and launch using launch control. Will I break?

PalmerGA · 04-27-2014, 06:10 PM

Quote:

Originally Posted by RobertRS

My money is on torque management through TCM that creates the dreaded low end throttle delay. It's one way that GM preserves their drivetrains. A good tuner can remove most of it but then you get on GM warranty bad boy list.

I'm thinking he's already on that list.

fukits1LE · 04-28-2014, 05:03 AM

Quote:

Originally Posted by McRat

Datalog - Pedal Position, throttle position.

This will tell you if torque management is still active.

Make sure you have turned off all stability control. The car might be applying the brakes.

What should pedal and throttle position say or be set to?
Thanks

04-26-2014, 02:12 AM	#1
fukits1LE Drives: 2014 SS 1LE Join Date: Dec 2013 Location: So Cal Posts: 10	Bogs hard when launching on drag radials ... Help When I launch the car instantly bogs hard like traction control is still on. I have 480hp to the ground so I should have more than enough power. It must be a tune issue. My tuner said all traction control is off. I don't know is its a knock sensor cutting the timing back or some kind of torque managment. It's A 2014 1LE with cam long tube headers air raid intake and pulled 483 on the dyno. I'm so bummed. I can launch between 3000-4500 with the drag radials at 30psi on an unpreped street and they just spin, once I put VHT down and air down the tires is when it all starts to go down hill. It has stock injectors and the tuner said they flow fine and it's not too lean nor is it running rich. The 1le has the ZL1 pump and an extra fuel pick up. Any ideas please. I'm going to put a 150 shot of nitrous on it after I get this issue resolved.

04-26-2014, 02:39 AM	#4
jvoisel Drives: 2010 2SS/RS M6 Join Date: Aug 2013 Location: New Orleans, La Posts: 436	Needs driver mod. How are you trying to launch it? __________________ 2010 2SS/RS

04-26-2014, 03:01 AM	#6
servax Drives: 11' Camaro 1SS Join Date: Jan 2014 Location: Texas Posts: 35	Are you sure your traction control is off completely (hold traction button for ~5 seconds)? Also try lowering your DRs to 24 PSI, at 30 PSI my traction control activates and the entire car bogs down. I have Mickey Thompsons 305/35/20, and after a bit of trial and error I realized that these tires do NOT handle well on anything over 36 PSI hot. __________________ First ProCharged i-1 L99 Engine in the World! ProCharger Stage II Intercooled Tuner Kit with i-1, Injector Dynamics 1300cc Injectors, Squash E85/Gas Duel Fuel Pumps w/ Hobbs Switch, Kooks LT Headers, MagnaFlow Mufflers, Full 3' FlowMaster American Thunder Exhaust, K&W Variant 3, Jannetty Racing Tuned

04-26-2014, 04:20 AM	#8
servax Drives: 11' Camaro 1SS Join Date: Jan 2014 Location: Texas Posts: 35	That's odd, it does sound like an tuning problem with your tune then - it shouldn't be bogging / cutting power if you have traction fully turned off. __________________ First ProCharged i-1 L99 Engine in the World! ProCharger Stage II Intercooled Tuner Kit with i-1, Injector Dynamics 1300cc Injectors, Squash E85/Gas Duel Fuel Pumps w/ Hobbs Switch, Kooks LT Headers, MagnaFlow Mufflers, Full 3' FlowMaster American Thunder Exhaust, K&W Variant 3, Jannetty Racing Tuned

04-27-2014, 10:03 AM	#11
McRat Drives: 2010 ZR1 "Satan" Join Date: Nov 2013 Location: Norco, CA Posts: 1,183	Datalog - Pedal Position, throttle position. This will tell you if torque management is still active. Make sure you have turned off all stability control. The car might be applying the brakes. __________________ 2002 Z06 "Blue Meanie" 11.36 ET 2003 Z06 in progress 2009 CTS-V "Spooky" 12.36 ET, bone stock at 1600 mi. Rainy day in Sacramento. Sadness. 2010 ZR1 "Satan" no times yet. 2013 Volt SCCA Solo2 #771 HS3. And a bunch of Duramaxes.

04-26-2014, 02:26 AM	#2
RobertRS Drives: 2014 2SS L99 Join Date: Mar 2014 Location: Corpus Christi Texas Posts: 1,320	My money is on torque management through TCM that creates the dreaded low end throttle delay. It's one way that GM preserves their drivetrains. A good tuner can remove most of it but then you get on GM warranty bad boy list.

04-26-2014, 02:37 AM	#3
fukits1LE Drives: 2014 SS 1LE Join Date: Dec 2013 Location: So Cal Posts: 10	Does the manual trans have any torque managment

04-26-2014, 11:36 PM	#9
fz4k98 Drives: 2013 1ss Join Date: Jul 2012 Location: WI. Posts: 569	If it spins the tires with higher air pressure but bogs at lower, it may be too much traction for the power put out at lower rpm. With no tire slip the engine is being brought down to lower rpms and needs to recover. I watched a guy show up with massive tires on his car and it would die at launch. His issue was the engine needed to stay up on rpm and the tires hooked too well. Some degree of tire spin is better than total hookup.

04-27-2014, 12:17 AM	#10
TxBandit911 Call Me"Doc" Drives: 2014 2SS/RS 1LE BLACK Join Date: Apr 2009 Location: Ft Riley, Kansas Posts: 890	I used to drop my clutch at 5500-6k, with DR on it, had to or else it just did wanna go... Tach it up pretty high once and drop it, just to rule out the easy stuff

04-27-2014, 10:25 AM	#12
Dfault Drives: 2014 Camaro SS Join Date: Sep 2013 Location: Waco, TX Posts: 988	Here is an off subject question. If I don't upgrade any thing and just slap some 275 ET streets, and launch using launch control. Will I break?