Theorhetical Top Speed in the 04 and 05

A quick question for any of you math types out there.

What is the theorhetical top end of the 04 and 05 GTO both automatics and manuals. I've been too chicken to hit the limiter in my 04 yet. So with the limiter removed what would be our top end speed given a flat surface, decent temperature, and no headwind? I'll assume the M6 will be a little higher than the A4 due to gearing.

And on that note, with the 05 getting 400 hp and basically the same weight. What will the theorhetical top end be for it?

I'm guessing somewhere south of the 05 Vettes 186 mph as reported by Chevy.

Your thoughts? :)

Well simply factor in weight, gaer and the areodynamic diferences..... :drevil:

The HSV GTO (vz series coupe) with a 403HP 6.0 Litre V8 will top out at 176.5mph according to HSV.. or 284kph.... it has the same gearing as Pontiac GTO (3.43:1)

So that makes it about 2.942 miles per minute....

The cop sitting at the side of the road would choke on his donut :)...

James

I got my GTO up to 155.

Then I chickened out and took my foot off the gas.

The HSV GTO (vz series coupe) with a 403HP 6.0 Litre V8 will top out at 176.5mph according to HSV.. or 284kph.... it has the same gearing as Pontiac GTO (3.43:1)


Thanks for that bit of info. I'll take it that it was the M6?

I'd love to here any of our braver members who have removed the limiter (via reprogramming) who have been on the other side of 160. On a nice track or closed race course for certain. ;)

In the Top Gear review of the Monaro, JC hinted that the unlimited top speed of a stock '04 was between 160-170. I believe him ;-)

Originally posted by jbernie@Oct 8 2004, 12:56 AM
The HSV GTO (vz series coupe) with a 403HP 6.0 Litre V8 will top out at 176.5mph according to HSV.. or 284kph.... it has the same gearing as Pontiac GTO (3.43:1)
I thought the GTO has a 3.46 rear?

It does....maybe thats the holden GTO

I thought the GTO has a 3.46 rear?

It does, i mistyped :)

James

Originally posted by Orbit Orange@Oct 8 2004, 11:46 PM
I'd love to here any of our braver members
Braver members,what the hell is that suppose to mean? :angry:

Lol, you said youself you chickened out.

Yeah, I know.

I'm just play'n. :D

Originally posted by DrachenGTO@Oct 10 2004, 12:10 AM
In the Top Gear review of the Monaro, JC hinted that the unlimited top speed of a stock '04 was between 160-170. I believe him ;-)
This Top Gear test claims 178mph for their Vauxhall Monaro VXR, which is basically a rebadged 382hp LS1 HSV GTO. The 330hp model does 168mph

Link (http://www.topgear.com/jsp/individualRoadTest.jsp?carType=used&mCode=E7&rCode=AA&mDesc=Vauxhall&rDesc=Monaro&roadTestNumber=01_01.html)

A few years ago a reputable AU magazine maxed a stock 315hp CV8 Monaro M6 at Avalon airfield to 172mph. CSV's Monaro-based variant does 180 with 409hp, there's also a 536hp version

Well from my calculations, the theorhetical top speed, not including drag, would be 232 miles an hour :o . That is as fast as you could get the wheels to spin at 6000 rpm. If anybody thinks I am wrong about this I might be but I am using a formula that I got out of a car mag.

true but drag is a major factor over 100MPH

The aerodynamic drag force increases like the velocity squared, and the power required increases like the velocity cubed. For example, if the velocity doubles, the drag force is 4 times higher and the power required is 8 times higher.

I ran some quick numbers to illustrate this. (Sorry if I'm getting too technical.)

If the aerodynamic drag coefficient is 0.3 (typical for a fairly aerodynamic car) and the frontal area is 27 sq ft, then at 60 MPH, the aerodynamic drag force is about 73 pounds, and the power required to overcome this force (neglecting rolling resistance, friction, etc.) is about 12 HP. At 100 MPH, the drag force is about 202 lb and the power required is 54 HP. No big deal, right? Well, at 155 MPH, drag = 486 lb, power = 201 HP, at 170 MPH, drag = 584 lb, power = 265 HP, and at 232 MPH, drag = 1088 lb, power = 673 HP!

It piles up fast, and these are probably conservative numbers. These are just an example, I don't know the exact drag coefficient and frontal area for the GTO.

Thanks for the math numbers. :D

I guess I'll have to find out myself what top end is if I ever have my limiter removed.

I'll have to get brave or stupid or both. :lol:

Remember when you are at the track :rolleyes: pushing the top speed. Our tires are only W rated (168mph).

I thought the A4 and M6 had the a same final drive ratio so they would have the same top speed. I dont doubt even the A4 could do 170-175.

Originally posted by YellowGoatNick@Nov 5 2004, 09:19 PM
I thought the A4 and M6 had the a same final drive ratio so they would have the same top speed. I dont doubt even the A4 could do 170-175.
They do, but the A4 has 4 gears to the M6's 6, thus the transmission gears are different.

Originally posted by Nocturn+Nov 5 2004, 09:49 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Nocturn @ Nov 5 2004, 09:49 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-YellowGoatNick@Nov 5 2004, 09:19 PM
I thought the A4 and M6 had the a same final drive ratio so they would have the same top speed. I dont doubt even the A4 could do 170-175.
They do, but the A4 has 4 gears to the M6's 6, thus the transmission gears are different. [/b][/quote]
I know that but (excuse my ignorance with transmissions and gearing) if the final drive ratios are the same dosnt that mean they have the same top speed?

Well for simplicity sake
Auto - Manual
3.5-4.0
2.5-3.0
1.5-2.5
0.5-2.0
XX-1.5
XX-0.5

Assuming those are the transmission gears (they arn't but for demostration it will work) The Auto has to use smaller gears to maintain driveabiltiy, where in the standard can use bigger gears and still retain driveability due to its having 6 total gears.

To achieve the top speed, you would need to calcualte the engine redline, the transmission gear, the rear end gear, and the tire diameter.

Since engine redline, tires, and rear end are all the same. In this case the auto has a .70 top gear, to the standards .57 (lower the number the longer it takes for the engine to go through an entire gear) So on that simply factor alone the standard will have a higher top speed, but it won't achieve that speed due to the areodynamics and such as its 200+ mph I believe.

Iv been 151 mph in my 04 running behind a z06 staying about 3 car links behind him , had to slow down cause we ran into some slow moving traffic lol ,u believe that ?, we got off the same exit and pulled up next to each other and rolled windows down and i asked him how fast he was going and he said he seen 156 mph said thats the fastest he had the car .... real kool guy

151 that's over a mile every 30 seconds right. :unsure:

Lets see @ 60 mph you will do a mile a minute so @ 120 you get a mile in 30 seconds.

That's a bunch of road :woot:

Originally posted by ronhall512@Nov 28 2004, 10:25 PM
151 that's over a mile every 30 seconds right. :unsure:

Lets see @ 60 mph you will do a mile a minute so @ 120 you get a mile in 30 seconds.

That's a bunch of road :woot:
151 MPH, is 2.51 miles a minute.

Originally posted by TheJizzer@Nov 5 2004, 06:32 PM
Remember when you are at the track :rolleyes: pushing the top speed. Our tires are only W rated (168mph).
My car came equipped with Z-rated BFGs

Originally posted by silver04GTO@Nov 19 2004, 11:40 PM
Iv been 151 mph in my 04 running behind a z06 staying about 3 car links behind him , had to slow down cause we ran into some slow moving traffic lol ,u believe that ?, we got off the same exit and pulled up next to each other and rolled windows down and i asked him how fast he was going and he said he seen 156 mph said thats the fastest he had the car .... real kool guy
How was the engine temp after that run?????


Slower Traffic?!?!?!?!? (Slow pokes...) LOL.

0.31 coefficient of drag as I recall from somewhere on the '04. '05 might be a bit higher with hood scoops.

At another GTO website there is a top speed calculator based on engine rpms and transmission / gear ratios.
At 6500 rpms in 6th gear it calculated 251 mph for the GTO 6 speed
At 6500 rmps in 4th gear it calculated 205 mph for the GTO A4 Automatic

This is of course if the car had enough hp to push it to these speeds.

251 MPH seems a bit much, since the Bugatti Veyron's top speed is 252 (and it is the fastest production car on the US market).
What is the top speed that the limiter allows on the GTO, and how hard (or expensive) is it to have it removed?

Originally posted by coolcyclist@Feb 27 2005, 09:20 AM
251 MPH seems a bit much,* since the Bugatti Veyron's top speed is 252 (and it is the fastest production car on the US market).
What is the top speed that the limiter allows on the GTO, and how hard (or expensive) is it to have it removed?
Speed limiter is 158 mph (which the 6 speed can do easily in 5th gear) . As soon as engine programming becomes availble it can be removed. They ususlly cost a few hundred dollars.

Hypertech, Superchips, Fastchips are some of these type programmers. I used a Hypertech programmer on my 99z28 to raise its top speed.

and about the 251 mph top speed. Thats if the GTO had enough hp to push it to that speed (which it doesn't). Friction/drag doesn't allow it to reach those speeds with only 400hp.

Here's a link to the top speed calculator.
http://ultimategto.com/art29.htm?engine=65...peed+Calculator (http://ultimategto.com/art29.htm?engine=6500&trans=2.97+2.07+1.43+1.00+0.84+0.57+2.90&axle=3.46&tire=245+45+17&B1=Load+Driveline+Data+into+Top+Speed+Calculator)

I think I read somewhere that the limiter is between 155 and 164, but I think that they actually have to reprogram the computer don't they to remove it? :unsure:

emm thanks for the clarification about how the GTO can't reach 251 MPH. In that case what is the top speed, or is that infromation Pontiac feels it best they not release, since it might encourage drivers to attempt those speeds? So if anyone either knows the actual top speed, or just the fastest they have pushed their GTO please post... I'm intrested... not like i would ever speed in my GTO (once/ if I get it) javascript:emoticon(':unsure:')
smilie

155, It can reach the computer pre set speed limit.

Originally posted by Orbit Orange@Oct 7 2004, 04:16 PM
A quick question for any of you math types out there.

What is the theorhetical top end of the 04 and 05 GTO both automatics and manuals. I've been too chicken to hit the limiter in my 04 yet. So with the limiter removed what would be our top end speed given a flat surface, decent temperature, and no headwind? I'll assume the M6 will be a little higher than the A4 due to gearing.

And on that note, with the 05 getting 400 hp and basically the same weight. What will the theorhetical top end be for it?

I'm guessing somewhere south of the 05 Vettes 186 mph as reported by Chevy.

Your thoughts? :)
I got 2 tickets in the last couple months so I am going to be keeping mine under the speed limit for a while til these blow over, I had my 97 vette at 168 once before and that was a smooth ride but pretty scary, especially being loaded and on a highway, my friend had a 2001 ws6 and that car was scary to get over 130, do you find that the GTO handles better at high speeds?

I don't know about ya'll. But I got my 05 goat w/ m6 to 160 before the computer cut the ignition out till I droped down below 158. B)

hey fastgoat i was in Kingsland Mondayand I think I seen your car. I have had mine to 146 and ran out of road.

Originally posted by 1bdgoat@Mar 16 2005, 07:24 PM
hey fastgoat i was in Kingsland Mondayand I think I seen your car. I have had mine to 146 and ran out of road.
Well if you saw a black 05 it was me. I am the only one in the area. I found out mine on one of the roads over by the Folkston land fill. B) One of these days when I get a helmet I am going down to Jax Speedway.

must have been you then, I liked the black one the dealer had, but he had traded it to another dealer and I couldn't get it so I bought the red one. I think some friends and i are gonna get together and go to the track in Adel

Originally posted by 1bdgoat@Mar 16 2005, 10:43 PM
must have been you then, I liked the black one the dealer had, but he had traded it to another dealer and I couldn't get it so I bought the red one. I think some friends and i are gonna get together and go to the track in Adel
What was the name of the Dealer that you were looking at? Was the interior black? Where is that track you are talking about. If it isn't to hard to get too we might get together. :friday:

the dealer was Anderson Pontiac in Douglas,and it was a blk/blk m6 It's a 1/4 mile track right out of Valdosta Dragstrip (http://www.sgmpracing.com/) I have never been to it, but my cousin has a 2000 Z28 and we are going to get together and go, soon cause he's talking too much :bs: If it's not too far we'll go and he can get outrun by 2 goats ;)

So how do you like the red one? Depending on the time we'll have to get together and do that.

I like it . I clayed, polished and waxed it last sunday and I swear, I pulled it out into the sun and needed sun glasses to look at it. Then it rains wed, thur, fri and it looks like **** again.
I looked up the distance from Kingsland to Adel and it like 120 miles one way, so Jax Speedway might be a better choice, because it about the same distance for me to both

Hey, Getting to the top speed thing. 160 before rev limiter kicks in but i was in fifth, was goona try to push it to sixth, but the exit was a mile away so i started slowing down. Theoretically (SP) speaking with the correct gearing im guessing 175 possibly, sixth gear sucks for speed because its overdrive, gear er right she'll go fast. P.s. The Goat feels like your goin 45 at 160, doesnt shake at all, gotta love the suspension handles like a dream. Is there really an electric govenor or is it just rev limiter?

There is supposed to be a limiter, but it could only remember to kick in at around 158....

i might be alittle late on this post but i had my 05 goat up to 161 in 5th at about 5,500 or so and it was still pulling pretty good but i had to let off cause a turn was coming up pretty quick and that car is prety whicked goin that fast! :o

the limiter is set for around 156 so it can go a bit over, so just expect not go go much faster than what you were at before it would have kicked in.