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Discussion Starter #1
I have a silver 05 GTO Auto .. after 500 miles i started to get on it.
I"m surprised how hard it's to beat some of the cars I had raced

Turbo Diesel Truck, the one that runs 14.40 .. gets me off the line and i didn't pass him till 50 mph

Another Turbo Diesel Truck, we both punch at 45, he hangs with me till 70..sheesh

Z28 1991 245 HP 5.7L .. well he sucker punched me ... and got a 4 or 5 car head start, but i couldn't catch him at all too 100 mph .. he was stock also...

Just a little dissapointed, thought the car would be faster ...

I life in Florida, and wonder if it's a heat problem... temp gauge is always on the 1/3rd way mark or just touching it from under...
is that normal ?

What can I do for an 05 Auto to get 12.8s on the street ? I was reading the forums, but nothing really promising. Mostly 04 mods...
 

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i dont think its so much the heat issue, i live in florida as well, and heat will hurt you, not that much. wait until you break your engine in all the way. i have right about 3000 miles on mine, and it pulls real hard, everytime. good luck.
 

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when the preditor comes out you can change the shift firmness in the trany that will help because it speeds up the shift. You should have been a little faster against the truck but its no suprise that he took you off the line. 500+ in torque, allison transmission and 265 or 285 tires, my parents have a F250 King Ranch and the thing is bad ass, not to mention that if you take a preditor to it you can increase it over 130 HP and TQ with the thing still sounding stock.
 

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Braman'sGTO said:
when the preditor comes out you can change the shift firmness in the trany that will help because it speeds up the shift. You should have been a little faster against the truck but its no suprise that he took you off the line. 500+ in torque, allison transmission and 265 or 285 tires, my parents have a F250 King Ranch and the thing is bad ass, not to mention that if you take a preditor to it you can increase it over 130 HP and TQ with the thing still sounding stock.
Once the TM is off, it will be an all new ball game. But the 'stock' 91 shouldn't have been a problem.
 

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Nightshifter said:
I have a silver 05 GTO Auto .. after 500 miles i started to get on it.
I"m surprised how hard it's to beat some of the cars I had raced

Turbo Diesel Truck, the one that runs 14.40 .. gets me off the line and i didn't pass him till 50 mph

Another Turbo Diesel Truck, we both punch at 45, he hangs with me till 70..sheesh

Z28 1991 245 HP 5.7L .. well he sucker punched me ... and got a 4 or 5 car head start, but i couldn't catch him at all too 100 mph .. he was stock also...

Just a little dissapointed, thought the car would be faster ...

I life in Florida, and wonder if it's a heat problem... temp gauge is always on the 1/3rd way mark or just touching it from under...
is that normal ?

What can I do for an 05 Auto to get 12.8s on the street ? I was reading the forums, but nothing really promising. Mostly 04 mods...
What Diesel Truck is this? I have the M6 and have yet to be beaten by anything with 4 wheels, and I have embarrassed 2 guys on thier Harley Davidsons with thier "women" on the back after they started talking smack at a red light and a guy on a Harley "ape-hanger". WRX, 05 Mustang GT, 3.5 TL, Mercedes C500, 350Z, S2000, Camero SS just to name the ones off the top of my head. I assume you are using Premium unleaded and are turning off the T/C by default when you buckle your seatbelt. I dont even think I would waste the gas to run against some 5000lb diesel pickup truck. If you are trying to run these guys when its 93F, you have your AC on and have been sitting in traffic, forget it. My wife's minivan has more pull in that situation but in the morning or evening its shouldnt even be a contest.
 

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Discussion Starter #7
JMVorbeck said:
What Diesel Truck is this? I have the M6 and have yet to be beaten by anything with 4 wheels, and I have embarrassed 2 guys on thier Harley Davidsons with thier "women" on the back after they started talking smack at a red light and a guy on a Harley "ape-hanger". WRX, 05 Mustang GT, 3.5 TL, Mercedes C500, 350Z, S2000, Camero SS just to name the ones off the top of my head. I assume you are using Premium unleaded and are turning off the T/C by default when you buckle your seatbelt. I dont even think I would waste the gas to run against some 5000lb diesel pickup truck. If you are trying to run these guys when its 93F, you have your AC on and have been sitting in traffic, forget it. My wife's minivan has more pull in that situation but in the morning or evening its shouldnt even be a contest.
I have the T/C.. does that make much of a difference from a roll ?
Maybe from a launch ? I just let the automatic shift, or is it optimal to manually shift it ? Those Ford Powerstroker Diesel trucks.. i see them stock run 14.4s at the track.

No AC is on, windows are down. But it's 90 out and very humid.
 

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If my T/C senses any wheelspin in instantly dumps the throttle. After that it starts putting on the rear binders. MASSIVE performace loss. I cuss myself everytime I forget and leave it on, and try pulling into traffic quickly. The silly thing then only gradually starts adding the throttle back on (though in the rain, its my friend). Turn off the T/C and when its not blazing hot and in traffic you will SMOKE a diesel truck, guaranteed. I dont know about the auto, but in the GTO at WOT I would have to imagine the shift point are near perfect (they claim its faster than the M6).
 

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JMVorbeck said:
If my T/C senses any wheelspin in instantly dumps the throttle. After that it starts putting on the rear binders. MASSIVE performace loss. I cuss myself everytime I forget and leave it on, and try pulling into traffic quickly. The silly thing then only gradually starts adding the throttle back on (though in the rain, its my friend). Turn off the T/C and when its not blazing hot and in traffic you will SMOKE a diesel truck, guaranteed. I dont know about the auto, but in the GTO at WOT I would have to imagine the shift point are near perfect (they claim its faster than the M6).
:agree
I think that when TC kicks in there is an indicator that comes up on the DIC. Usualy I'm too occupied driving the car that I don't get a good look at it when it happens. But when I turned off the TC for the first time I immediately noticed a big difference in acceleration, and I wasn't slipping the clutch at 4K RPM, just jumping on it hard once I'm rolling. I think the TC either senses more wheelspin than I can, or it is protecting me more than I need it to!
 

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JMVorbeck said:
What Diesel Truck is this? I have the M6 and have yet to be beaten by anything with 4 wheels, and I have embarrassed 2 guys on thier Harley Davidsons with thier "women" on the back after they started talking smack at a red light and a guy on a Harley "ape-hanger". WRX, 05 Mustang GT, 3.5 TL, Mercedes C500, 350Z, S2000, Camero SS just to name the ones off the top of my head. I assume you are using Premium unleaded and are turning off the T/C by default when you buckle your seatbelt. I dont even think I would waste the gas to run against some 5000lb diesel pickup truck. If you are trying to run these guys when its 93F, you have your AC on and have been sitting in traffic, forget it. My wife's minivan has more pull in that situation but in the morning or evening its shouldnt even be a contest.
There are some things I notice also down here in Florida, my car does not respond as well after sitting in traffic on a 95 degree day. Makes me sad somtimes, I even tried taking the the rubber hood plugs out to let the engine breathe. JM is right though when it is cool, like in the morning, it is a monster.
You can't say to some one out the window "I'll race you.....tomarrow morning...." When a tuner comes out for the 05 will this make things better??
 

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I dont think a tuner will fix that. The compression ratio in this engine is very high. When its sucking in really hot air, the computer is retarding the timing pretty good to eliminate detonation and it kills the power. Its a protective action that you would not want to defeat. The answer is to get the engine cooler air and a CAI is the way to do that. The only problem I have found with these is that a lot of them are simply a cone filter inside the engine compartment, which for a CAI is really like an oximoron. There was one on a CAI thread on here that was boxed and sealed and used the factory intake grille. I am looking for one to use the scoops in the hood which makes the most sense. There is a thread on here that has pix of a new dual runner intake setup for the GTO and its CAI has a big shroud and 2 cone filters that from the pix looks like it sits directly under the scoops. Someone should design something like this for the stock intake. IMHO.
 

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You may have a bad running (from the factory) 05 LS2 GTO. I had one. My car was running real slow compared to how it should run. When they first put it on the dyno it only made 320.8 rwhp (m6) The car even felt sluggish to drive and even worse when it got hot.

I got some Kook's headers, high flow cats, x pipe and had my car dyno tuned with LS2 edit.
With a conservative tune I made 358 rwhp. It was also 97 degrees in the shop when my car was dynoed.

My car now drives and feels like a completely different car. It rediculous how much faster it feels. I made around 40 rwhp with just headers and a tune.

I ran a C5 Vette on the highway and walked him at xxx speeds. My car is fast as Shxt now. Huge difference.

So I would bet your car is out of tune (running very rich).
 

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What would be the best way to go about getting it tuned? Dealer, performance shop any feed back would be greatly appreciated.
 

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Discussion Starter #14
Anyone else living in Southern Florida ? What should I expect in the 1/4 on a summer night in Florida at the track ? it's usually +80% (usually 90 or more) humidity and above 83 around 9:00pm...

I timed the car 0 - 60 with a vector and got a 5.10 so far.. .first one.

4.6 sec is what is advertised, but maybe when it's 60 degrees out and the humidity is half of what it's here in Florida during the summer.

Is that about right ? It was 92 degrees out and humid.

What about those hood plugs, better to remove them ?
 

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JMVorbeck said:
What Diesel Truck is this? I have the M6 and have yet to be beaten by anything with 4 wheels, and I have embarrassed 2 guys on thier Harley Davidsons with thier "women" on the back after they started talking smack at a red light and a guy on a Harley "ape-hanger". WRX, 05 Mustang GT, 3.5 TL, Mercedes C500, 350Z, S2000, Camero SS just to name the ones off the top of my head. I assume you are using Premium unleaded and are turning off the T/C by default when you buckle your seatbelt. I dont even think I would waste the gas to run against some 5000lb diesel pickup truck. If you are trying to run these guys when its 93F, you have your AC on and have been sitting in traffic, forget it. My wife's minivan has more pull in that situation but in the morning or evening its shouldnt even be a contest.
Don't underestimate the diesels. With propane injection, larger Banks turbos and computer programming, these trucks haul ass. I have a video of an extra cab F-350 running 11.42 in the quarter at Las Vegas drag strip.

I tried to attach the video to this post but the file size is larger than 2.0 MB.
 

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6QTS11OZ said:
Don't underestimate the diesels. With propane injection, larger Banks turbos and computer programming, these trucks haul ass. I have a video of an extra cab F-350 running 11.42 in the quarter at Las Vegas drag strip.

I tried to attach the video to this post but the file size is larger than 2.0 MB.
Yeah, I have seen those trucks too. Like alot of vehicles out there if you have enough money you can make them go real fast. I was referring to the mainstream Diesel trucks that you are likely to encounter on the street. Most of these guys will likely only have a "Bully Dog" type unit and even more rarely a propane kit. Those typical mods will make your pickup really move around the street but I seriously doubt it would pose a threat to a stock GTO. The performance specifications as given by Dodge on the RAM SRT-10 dont compare to the GTO, those trucks have a huge weight disadvantage that you have to throw massive amounts of power at. 8.3 Litre Viper V-10 500Hp/525Tq and 5.2 seconds 0~60. Now thats fast! Just not fast enough. GTO 4.6 seconds 0~60
 

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JMVorbeck said:
Yeah, I have seen those trucks too. Like alot of vehicles out there if you have enough money you can make them go real fast. I was referring to the mainstream Diesel trucks that you are likely to encounter on the street. Most of these guys will likely only have a "Bully Dog" type unit and even more rarely a propane kit. Those typical mods will make your pickup really move around the street but I seriously doubt it would pose a threat to a stock GTO. The performance specifications as given by Dodge on the RAM SRT-10 dont compare to the GTO, those trucks have a huge weight disadvantage that you have to throw massive amounts of power at. 8.3 Litre Viper V-10 500Hp/525Tq and 5.2 seconds 0~60. Now thats fast! Just not fast enough. GTO 4.6 seconds 0~60
The original post wasn't referring to a modded or stock diesel truck. Nightshifter was just surprised that a diesel truck was able to hang with him for a quick second or two. All I was saying is that any vehicle can catch you off guard if you don't know what's under the hood. And that's what happened to Nightshifter.
 

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vmax said:
I think the TC either senses more wheelspin than I can, or it is protecting me more than I need it to!
The T/C is way too sensitive under hard acceleration, I have an 04 and if I leave T/C on, sometimes it will even kick off when shifting into 4th (granted it's during perfect shift points...I highly doubt it chirped the tires in 4th). Never the less, traction control is way too sensitive...but in bad weather that's a nice thing ;)

As far as the auto's being faster, I still believe that's only for a 0-whatever run. On road races, I feel an auto loses to the M6 hands down.
 

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Nightshifter said:
Anyone else living in Southern Florida ? What should I expect in the 1/4 on a summer night in Florida at the track ? it's usually +80% (usually 90 or more) humidity and above 83 around 9:00pm...

I timed the car 0 - 60 with a vector and got a 5.10 so far.. .first one.

4.6 sec is what is advertised, but maybe when it's 60 degrees out and the humidity is half of what it's here in Florida during the summer.

Is that about right ? It was 92 degrees out and humid.

What about those hood plugs, better to remove them ?
I have removed my hood plugs, I'm just not sure that it helps alot.

As far as times are concerned, I'm running at Gainesville and Orlando Speedworld. In the early spring on a low 60 degree day with low humidity and good air I ran a 12.895 at 109. Low 70's and decent air I ran 13.1-13.3. Mid 80's with 90 plus humidity and not the greatest air I ran 13.6 as a best after removing the fuel rail covers. Before removing the fuel rail covers I was at 13.9- 14.2. I'm thinking a car running 13.7-13.8 would equal your 5.1 time based off of the times in mags.
My car is not modded except to have an extra hole cut into the front of the intake box behind the headlight. Mileage for these runs has been between 1300 and 3500 miles, so it is not all the way broken in yet. This was on street tires with the air set at 25-27. I get 2.0x 60 ft times, with almost no wheelspin and in 40 plus passes only 1 run with wheel hop.
I have tried 3 passes without and 3 passes with the traction control on. I don't know if my computer is set-up different or something, but there is only 1-2 tenths difference. 1 better and 2 worse with the traction control on. My second best pass a 13.05 was with the traction control on. Mine tends to allow enough wheelspin that I start to back out before it cuts in. The only time I notice it is in real wet situation and when i do something stupid.
 
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