I felt with my K&N CAI that it was more resposive, but have no proof or backup to substatiate my claim. Some say that they lost performance, but in my case there seemed to be quite a bit more throttle response. CAI= ~$210.00.

 

Very happy with my new GTO ('06 with Auto) and don't feel any need to drastically increase the horsepower, but I would like to know if there is a reasonably economical way to give it just a hair more instantaneous throttle response. It reacts almost instantly when accelerating at highway speeds (55->65) but I detect just a hair of delay when leaving from a standing start.

Does anyone have any recommendations?

Thanks in advance for the help.

It's just my guess, but that slight delay is prob the electronic throttle control..just my .02.

 

Turn off the Traction control

 

It's just my guess, but that slight delay is prob the electronic throttle control..just my .02.

That would be my guess also. My old car (Cobalt SS/SC) was drive by wire, and it did the same thing, but the delay seemed longer than the goats.

 

Very happy with my new GTO ('06 with Auto) and don't feel any need to drastically increase the horsepower, but I would like to know if there is a reasonably economical way to give it just a hair more instantaneous throttle response. It reacts almost instantly when accelerating at highway speeds (55->65) but I detect just a hair of delay when leaving from a standing start.

Does anyone have any recommendations?

Thanks in advance for the help.

Welcome to the Forum and have fun in your New Goat.

I would suggest two items to gain throttle response on a stock LS2 A4. The first would be Noltec motor mounts and the second would be a custom tune which will allow the torque management to be disabled and adjust the air/fuel ratios and the timing (run rich from the factory). But before spending money on anything I would try turning off traction control, but be careful until you get/learn the feel for the difference when you punch it...

 

It's quite amusing how quick some of you are to lay blame on the electronic throttle mechanism with nothing more than unsubstantiated SotP evidence. =p

It shouldn't surprise most of you that F1 cars have drive-by-wire throttle systems. Ofcourse lets not forget that BMWs and Ferraris to name a few exclusively build all of their new cars with drive by wire throttles, even cars like the M3/M5/M6.

Guessing completely off the cuff, I'd guess the reason you believe there's a slight "delay" launching from a standing start is the split second it takes for the suspension to compress and the wheels to grab at the road.

 

Cam!!

 

You can get better throttle response by porting your TB

 

Put 3.91 gears in the differential and you'll get instant throttle response.

 

It's quite amusing how quick some of you are to lay blame on the electronic throttle mechanism with nothing more than unsubstantiated SotP evidence. =p

It shouldn't surprise most of you that F1 cars have drive-by-wire throttle systems. Ofcourse lets not forget that BMWs and Ferraris to name a few exclusively build all of their new cars with drive by wire throttles, even cars like the M3/M5/M6.

Guessing completely off the cuff, I'd guess the reason you believe there's a slight "delay" launching from a standing start is the split second it takes for the suspension to compress and the wheels to grab at the road.

i am amused too but then i'm always amused. i think it may partly be the electronic throttle control. F1 cars don't have torque managment . the VCM is probably palying witht he throttle to keep torque under it's predefined level. i think a tune will sharpen it up.

 

swap out the LS2 for the LS1. :fawkdance lol

but seriously my GF's car has the same thing and it has throttle lag as well.

 

a little over 1k in mods improved the throttle response on my GTO.

 

I don't know about the 05/06 but the removal of torque managment built in to the ECM on my 04 was a big factor. It was a night and day difference.:turbonaug

 

Getting a tune or tuning the car yourself is the answer. The drive by wire throttle curve (and TM) is robbing you of the throttle response you desire. When you push down your foot 25% you are not getting 25% at the throttle blade as the electronic throttle is not a linear curve like a cable system often is.

This is done to make the car easier for people to drive in the rain/snow and prevent sudden throttle jerks or surges when you are slowly rolling through a parking lot in 1st gear. The same issues are found on most Caddys, Corvettes, and even on my Silverado SS with the ETC (Electronic Throttle Control). For some odd reason to me it feels like the GTOs have the worst (slowest) throttle curve I have driven when you step on the throttle just off idle. I'm sure glad my Camaro SS doesn't have that problem.

I use EFILive to tune our vehicles and there is an ETC table you can adjust which will greatly improve the throttle curve making it much more linear and responsive. My Silverado SS now has a very sensitive (punchy feeling) throttle with just a retune of the PCM. I may have gone too far as it can be tricky to drive smoothly through a bumpy intersection but the throttle response is CRISP to say the least! :turbonaug I may have to reduce it just a little this winter for driving in the snow but I am loving it now.

The TM is reducing the timing right off of idle (it actually goes negative for a second in the GM trucks) to the point that the initial take off feels sluggish as you have commented on. Reducing the TM or removing it all together will definately help but the throttle curve reprogramming will help the most with around-town throttle response.

Hope that helps!

Greg atriot:

 

Man this list runs the gambit. He asked throttle response. If you want the biggest bang for your buck to make the car fast???? 3.91's hand down the best go fast mod.

 

It's quite amusing how quick some of you are to lay blame on the electronic throttle mechanism with nothing more than unsubstantiated SotP evidence. =p

It shouldn't surprise most of you that F1 cars have drive-by-wire throttle systems. Ofcourse lets not forget that BMWs and Ferraris to name a few exclusively build all of their new cars with drive by wire throttles, even cars like the M3/M5/M6.

Guessing completely off the cuff, I'd guess the reason you believe there's a slight "delay" launching from a standing start is the split second it takes for the suspension to compress and the wheels to grab at the road.

I driven lots of cars, trucks with the ETC and there is a slight delay between pushing the pettle down and the cars reaction. There is a differance between a ETC car and a cable car. I know this because I have owned, worked on, and driven a few cable TB cars. And know people that says the same thing between the two. I'm guessing becuse this is a free(somewhat) f'n country, and I can't feel what the guy feels when he's driving his car, so with that said it can be the ETC delay or TM. And for you to guess that it takes a spilt second for his tires to grab the road what you mean to tell me his car is floating now?? His tires is allready touching the road. Maybe driveline slack will be a better guess.

 

Man this list runs the gambit. He asked throttle response. If you want the biggest bang for your buck to make the car fast???? 3.91's hand down the best go fast mod.

Gears will not have any effect what so ever on throttle response!!!!!

It will make it seem like the car responds quicker, but in actually it is treating the symptom and NOT the problem. It is just allowing the engine to get that little bit higher in the rpm band sooner.

Like has been said, a tune that adjusts your ETC table and TM will actually fix the problem that is being discussed.

 

And for you to guess that it takes a spilt second for his tires to grab the road what you mean to tell me his car is floating now?? His tires is allready touching the road. Maybe driveline slack will be a better guess.

Ever noticed how the autos will squat when you apply the gas?

That is what he is talking about. Energy is being used by the suspension loading up instead of actually moving the car forward.

 

Ever noticed how the autos will squat when you apply the gas?

That is what he is talking about. Energy is being used by the suspension loading up instead of actually moving the car forward.

Maybe we are talking about two different things here. My idea of the delay is the pushing of the pettle and the car responding. I find that ETC cars have alittle "slack" in the pettle when pushed a hair compared to a cable car when pushed a hair it is more "touchy".

After I re-read the above I sorry if I miss-understood.

 

I think I've noticed some throttle response delay in any automatic I've owned. Even with a big-ass stall convertor you get it. Floor it, motor revs up and then takes off like a beast, especially with a little molecular help...

Its hard to tell what a person is used to, but he mentioned problems from a standing start, it takes a while to to get an a4 in it's power band. A stall convertor will help this greatly.

 

Perhaps the instantaneous response you are feeling at highway speeds is related to the converter being locked up (>40mph in 4th).

 

A little tech info for you, on ls2 no ETC table like on the trucks, brake torque limit table is what control opening rate on autos.

Tables inside Hptuners for LS2:
ETC TPS Max vs. RPM vs. %Max Available Torque = is for TC when enabled, to let it pull throttle when traction is limited

Brake Torque Limit vs. Vacuum vs. TPS = is about throttle opening rate. so when you stab the throttle, its controls rate at which it gets to WOT. which makes sense that this on manual cars this is all set to 6064. would not want to have a throttle controlled bog at every gear change.

Also it will seem like motor lugging coming out of the hole since the stock converter is tight.

 

Just because HP Tuners does not have a LS2 ETC table in their tuning software does not mean that it does not exist in the PCM. As you most likely know many tables were not available to tune with early revisions of both HP Tuners and EFILive (Edit too) that were added later. Maybe HP will have it on a future software revision.

 

Car in neutral, rev it...any delay? Not suspension or drivetrain related.

Tom.

 

yep there a delay from no throttle to WOT.

called "tire smoke" is the only delay I get.