#230 a Bat out of Hell?

[Doc]

So how much does one of your 21's weigh? I KNOW you don't think it's a factor but a lot of people here sympathize with you're situation and are trying to help you sort it out. If those wheels are only 9 lbs heavier that has the same effect as adding 180 lbs of sprung weight. That compounded with whatever the computer thinks it's doing with acceleration can be adding up to your power problems.

[PQ]

Originally Posted by Doc

So how much does one of your 21's weigh? I KNOW you don't think it's a factor but a lot of people here sympathize with you're situation and are trying to help you sort it out. If those wheels are only 9 lbs heavier that has the same effect as adding 180 lbs of sprung weight. That compounded with whatever the computer thinks it's doing with acceleration can be adding up to your power problems.

I'm giving it .2 seconds of loss. That's it.

Scott doesn't have the 21s on his and we're running about the same. And I'm sure the 21s do have an effect. Not enough to get me 7.8 seconds on some runs.

If my worst 0-60 was still in the lower to mid 6s then I'd be more willing to hear some of the 'factors' involved here. But I've had a number of times in the 7 second range. So maybe that should be my question.

Would it be normal to have 0-60 runs in the 7+ second range occasionaly. And I mean without the tires spinning. Tires hooking up, pushing the pedal, and get a 7.5 second 0-60? If it's normal to have that happen about every 4th or 5th time, then maybe you can factor in the Weather, and 21" wheels and I'm losing 1.5 seconds. So maybe .5 seconds because of the wheels and 1 full second for the weather? Street condition has nothing to do with it when your wheels can't spin. No traction control. And then if it's normal for the car to lose 3 seconds on occasion then I'm good. No complaints. I'm confident that when they look into this and fix it, we'll ALL be happier for it.

All I can say is I KNOW if some of you guys drove this car, you'd agree with me. The 'feeling' is as if you're towing something for the first 360 feet and then gradually gets stronger. Hard to explain.

I've been told by a reliable source that it's being worked on and I suppose I should just let it be until they get to it.

I will still have it done in Atlanta on Sept. 19th if they haven't figured it out by then. At that point if they fix it later, I'll just have egg on my face and I should have waited but that weekend will be the perfect time to do it if I needed to. BTW, I'm not coming from a slow car into this one so I know what a fast car should do.

And all you guys who have been saying it must be this and/or that. I'm not criticising you, I know you're just trying to help. My frustration is with the car and NOT you guys. I'll just wait for the 'word'.

Oh, ya, I decided to just keep my stock 20s and use them later so I may put them on and run some times. I will say this. My Dyno had me running at about the same HP and torque as most of the other L99s stock. So not much loss there WITH the 21" wheels.

[redjewel]

I hope your source is right and they come out with it before you have egg on your face. Well that and I am anxious for them to get rid of whatever it is I am towing also from takeoff until higher up there.

Scott what's the word from GM this week?

[Scott@Bjorn3D]

Have an conference call with engineering on Monday. Then we go from there on if they come here or she goes back to Detroit.

[1camaro70]

while you're talking..........ask what kind of DAMAGE the poorly tuned stock L99's are causing, are the engines actually hurting themselves by being too rich, poor air fuel ratio? what happens to the Cat. with all the extra unburned gas? what about emissions? I would think a car with proper control of air fuel ratio and proper timing is cleaner, less damage to internal components, less damage to the air, so if it's TUNED properly it's better.

[rpepka]

Originally Posted by Scott@Bjorn3D

Have an conference call with engineering on Monday. Then we go from there on if they come here or she goes back to Detroit.

I am very pleased to see that they have admitted that there is a problem and that they are actually doing something about it! I only wish I had recieved the same treatment and did not have to go through all the effort of trying to get mine fixed 3 times and then having to sell it.

[Scott@Bjorn3D]

Guys.

Here is my advice to all with slow L99's. Go to your dealer and have them open a TAC case on it. By reading here GM see's something is wrong and not an issue they had with CTF or press cars. GM needs to see all the people with slow cars opening cases so they can see how big the issue is.

Now your dealers may say nothing is wrong because the computer has thrown no codes. But make sure they open the TAC case and report the issue.

GM is going to go all over my car and fix it. And when they find what is wrong that will lead them to be able to come out for a fix for others. At this time the just do not have a car on hand with the issue. Mine will be in there hands and I have been assured it will be fixed.

Now I know I have gotten upset with this car but I also and you also must know we have a first year car. GM wants us to be happy with the our cars. They have been striped down on man power but they are going to find the problem, fix it and make us all dang happy to have a L99.

[Supermans]

Originally Posted by Scott@Bjorn3D

Guys.

Here is my advice to all with slow L99's. Go to your dealer and have them open a TAC case on it. By reading here GM see's something is wrong and not an issue they had with CTF or press cars. GM needs to see all the people with slow cars opening cases so they can see how big the issue is.

Now your dealers may say nothing is wrong because the computer has thrown no codes. But make sure they open the TAC case and report the issue.

GM is going to go all over my car and fix it. And when they find what is wrong that will lead them to be able to come out for a fix for others. At this time the just do not have a car on hand with the issue. Mine will be in there hands and I have been assured it will be fixed.

Now I know I have gotten upset with this car but I also and you also must know we have a first year car. GM wants us to be happy with the our cars. They have been striped down on man power but they are going to find the problem, fix it and make us all dang happy to have a L99.

I'm glad you are keeping yours and it will be fixed.

[SGOS252382]

Originally Posted by redjewel

I hope your source is right and they come out with it before you have egg on your face. Well that and I am anxious for them to get rid of whatever it is I am towing also from takeoff until higher up there.

Scott what's the word from GM this week?

I wouldn't say anyone would have egg on their face with they mod their car. GM will not be able to offer a tune that will provide the performance increase you'd get from a good dyno tune from a skilled LSX tuner.

Here's actually what everyone with an L99 needs to do.

Quote from Fasst1:
Just to confirm the claims, I just had my L99 tuned and on the Dyno. I got an increase of 58 hp and 82 ftlb of torque with ARH headers and cats (stock muffler) and New Era CAI. Gotta love that increase in torque!

Headers, high flow cats, intake, and a tune = 58 hp, 82 ft lbs. I know what I'm going to do to my L99.

I wonder if GM will off this as a "packaged tune."

[redjewel]

Wether they offer something like that or not it is simple. GM needs to fix our cars to run as advertised and we will be happy without mods.

[SGOS252382]

Originally Posted by redjewel

Wether they offer something like that or not it is simple. GM needs to fix our cars to run as advertised and we will be happy without mods.

Not to dismiss the guys with more serious problems,

I think for a lot of people the first real cold front of the season will provide the "fix" they've been looking for. When the air temperature is 50 degrees outside, everyone will be amazed by how much faster their L99 runs.

You can't expect to run the advertised 4.7 sec , 0-60mph and 13.0 sec in the 1/4 mile in 90 degree heat with 60% humidity.


And as mentioned, I'm not talking about the "real slow" cars that are running
7.0+, 0-60mph. Because that shouldn't happen even when its 105 degrees outside.

[Scott@Bjorn3D]

Yeah I mean even hot outside it should run like 5.25 0-60. Not 6.2, 7.26, or 7.68 which it runs. The 6.2 was with the GM computer software hooked to the car tracking the time.

And remember this car was beat by a 2LT with 500+ pounds of passenger wieght. It had 50 miles on it I had 2200 miles on mine. Both auto's.

[SGOS252382]

Originally Posted by Scott@Bjorn3D

Yeah I mean even hot outside it should run like 5.25 0-60. Not 6.2, 7.26, or 7.68 which it runs. The 6.2 was with the GM computer software hooked to the car tracking the time.

And remember this car was beat by a 2LT with 500+ pounds of passenger wieght. It had 50 miles on it I had 2200 miles on mine. Both auto's.

I sure hope GM provides a fix before winter comes. Because with colder temperatures, it will be hard to make an apples to apples comparison. Because LSX cars are known for running much faster in cooler air.

I want to see how fast your car will run with the "fix" in 90 degree heat and humidity.

[1camaro70]

if GM is offering headers and exhaust and a CAI what are they expecting? do they expect HP and torque GAINS? if so whether you have a L99 that is at 305/300 or 325/327 (prior to a tune) they both will have GAINS, so what GAINS do not void the warrenty? if the gains on a healthy L99 are 40/40 we have 365/367 so that's still under warrenty. So now you take your sick L99 and have a TUNE only and have 327/342 and that is not covered under warrenty?