want to get a GTO this year - 04 or 05, differences?
05-03-2006, 07:57 PM
#22
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yeah thats nice stuff.....i think im going with the 6 speed though i never did like the auto's....yeah some of the stuff you did might be feasible in the near future....then i'll just save up and go through the bottom end and run boost when she's paid off
05-03-2006, 08:31 PM
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Problem with thw 6 speed is the axle hop.. The autos for the most part dont get it. the 6spd gets lots of it..But if your not big into drag racing then the 6 spd is defiantely quicker.
05-03-2006, 08:38 PM
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yeah i love the watch the hell out of drag racing at the local strip but im not gonna really bring my ride to the track except to post a time or two for the fun of it....yeah she'll be a daily driver
05-11-2006, 12:12 AM
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Please allow this message to serve as a factual discussion of the pro and cons for the 04v05 GTO. The main issue to understand is that there is very little difference in the engines. The 18 CIs in the Ls2 motor are of little consequence. If you add headers for instance to the 04, you will gain about 30-40 hp and about 25-35 foot pounds of torque. The same mod to an 05 will yield about 15 HP and 12 foot pounds of torque. This is true since alot of the standard mods are already installed on the 05 at the factory. The Ls2's additional 18 inches are not, repeat, are not the reason for the LS2's additional 50 HP.
Futhermore, if you check the torque comparison between the Ls1 and the Ls2 you will find the Ls1 produces a mere 15 lbs less than the Ls2. This is true despite the LS2's greater displacement. There is also another less obvious, but important problem in that the heads are different for the Ls2. When using a high lift Ls1 cam in an Ls2 motor the push rods may scuff the cylinder heads. That's correct. The heads are different.
There are many more reasons to use the Ls1, instead of the Ls2. Suffice it to say that in addition to the above, The Ls1 has been in production since 1997, and is still the basic truck engine for GM. Therefore, there are plenty of Ls1s on the street and in the yard for us to use. There is no difference between Ls1 performance and that of the Ls2, except for the above. The Ls2 engine was intended by General Motors to be a transition to the future, to wit: the Ls7 and beyond.
So please try to understand this before you make a purchase. Also, a bolt on the rear brake calipers of the 05 juts out just far enough to interfere with the fitment of after market rims such as Bogarts and other performance wheel manufactures who produce lightweight 17 in wheels instead overwight 19s designed for show use.
If you combine the above facts with the additonal fact that an 04 is cheaper than an 05, the only conclusion you can draw is to purchase the 04. And finally from a nonperformane view point, the 04 looks like a sleeper and usually fools a guy who thinks he is racing a ricer, ( as in, " I really like your red car... is that an Acura..."). Which is the usual comment until you put the
pedal to the medal and the only thing they see is your tailpipe.
Futhermore, if you check the torque comparison between the Ls1 and the Ls2 you will find the Ls1 produces a mere 15 lbs less than the Ls2. This is true despite the LS2's greater displacement. There is also another less obvious, but important problem in that the heads are different for the Ls2. When using a high lift Ls1 cam in an Ls2 motor the push rods may scuff the cylinder heads. That's correct. The heads are different.
There are many more reasons to use the Ls1, instead of the Ls2. Suffice it to say that in addition to the above, The Ls1 has been in production since 1997, and is still the basic truck engine for GM. Therefore, there are plenty of Ls1s on the street and in the yard for us to use. There is no difference between Ls1 performance and that of the Ls2, except for the above. The Ls2 engine was intended by General Motors to be a transition to the future, to wit: the Ls7 and beyond.
So please try to understand this before you make a purchase. Also, a bolt on the rear brake calipers of the 05 juts out just far enough to interfere with the fitment of after market rims such as Bogarts and other performance wheel manufactures who produce lightweight 17 in wheels instead overwight 19s designed for show use.
If you combine the above facts with the additonal fact that an 04 is cheaper than an 05, the only conclusion you can draw is to purchase the 04. And finally from a nonperformane view point, the 04 looks like a sleeper and usually fools a guy who thinks he is racing a ricer, ( as in, " I really like your red car... is that an Acura..."). Which is the usual comment until you put the
pedal to the medal and the only thing they see is your tailpipe.
05-11-2006, 12:50 PM
#31
something that has yet to be mentioned about the 05/06s over the 04s are the brakes. ive drove an auto and a stick 04, and eventually bought an auto 05. but i have to say i really like the brakes on the 05s. they are a bigger rotor and dual pistion PBRs up front, and vented disks in the rear (yes, i know the rears dont do much). for a nearly 4K lbs car, this thing stops pretty damn quick. you might not need the added braking power, but it sure is nice to have out here in phoenix with all the stupid drivers
05-14-2006, 11:01 PM
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This is a response to staging lane's correct observation about the 2005 and later brakes. They are bigger but not necessarily better. Please be advised that the 05 front caliper is identical to the caliper used on the C5. The 05 rears are the same calipers as on the 04. The C5 rear caliper is different.
This means that C5 front pads will fit on the 05. In addition the C6 front caliper is the as the C5's. So... C5 or C6 front pads will fit the 05 and have a larger pad for a greater brake swept area even though the pad back plates are the same size. This gets better. The pad back plates for the 04 and the 05 are the same!! So it obviously means that the C5-C6 pads while fit on the 04, thereby giving the same brake swept area as a 'vette. I use a set of C5 Hawk HPS pads and have enjoyed reduced stopping distances over the standard 04 Gto Hawk pads. The C5 pads are larger than the stock 05s also.
The only advantage you will gain by going to the larger 05 caliper is a slight reduction in caliper flex thereby giving you a higher and slightly stiffer pedal.
You can increase pedal stiffness on your 04, or 05, or for another matter, your C5 or C6 by changing the flexible rubber brake lines to braided stainless.
The upgrade to stainless lines is the greatest improvement you can make to a stock brake system to increase pedal firmness without going to offstreet racing equipment.
The larger 05 rotor weighs about 27#s compared to the stock 04 which weighs about 22#s. The bigger C5 pads are completely used and fully touch the smaller 04 rotor. Thus, the only thing you will gain by going to the 05 calipers are 5#s of extra unsprung weight...a definite no no !!!
Finally, I also use powerslot rotors which are slotted and not drilled to prevent warping and which also weigh 2-3 pounds less than stock. That is in addition to their greater stopping power over stock rotors. Accordingly, the numbers indicate if anything a conversion from the 05 brake setup to the 04.
So do yourself a favor and put C5 pads on both the 04 and the 05. Powerslots and both too although I do not think they make them for the 05.
The rear brakes are the same for each year and do not get Z06 pads since they only fit the larger Z06 caliper.
This means that C5 front pads will fit on the 05. In addition the C6 front caliper is the as the C5's. So... C5 or C6 front pads will fit the 05 and have a larger pad for a greater brake swept area even though the pad back plates are the same size. This gets better. The pad back plates for the 04 and the 05 are the same!! So it obviously means that the C5-C6 pads while fit on the 04, thereby giving the same brake swept area as a 'vette. I use a set of C5 Hawk HPS pads and have enjoyed reduced stopping distances over the standard 04 Gto Hawk pads. The C5 pads are larger than the stock 05s also.
The only advantage you will gain by going to the larger 05 caliper is a slight reduction in caliper flex thereby giving you a higher and slightly stiffer pedal.
You can increase pedal stiffness on your 04, or 05, or for another matter, your C5 or C6 by changing the flexible rubber brake lines to braided stainless.
The upgrade to stainless lines is the greatest improvement you can make to a stock brake system to increase pedal firmness without going to offstreet racing equipment.
The larger 05 rotor weighs about 27#s compared to the stock 04 which weighs about 22#s. The bigger C5 pads are completely used and fully touch the smaller 04 rotor. Thus, the only thing you will gain by going to the 05 calipers are 5#s of extra unsprung weight...a definite no no !!!
Finally, I also use powerslot rotors which are slotted and not drilled to prevent warping and which also weigh 2-3 pounds less than stock. That is in addition to their greater stopping power over stock rotors. Accordingly, the numbers indicate if anything a conversion from the 05 brake setup to the 04.
So do yourself a favor and put C5 pads on both the 04 and the 05. Powerslots and both too although I do not think they make them for the 05.
The rear brakes are the same for each year and do not get Z06 pads since they only fit the larger Z06 caliper.
