Coming out of the gym, turning onto 3 lanes going east. After the next light, it narrows to one lane if you want to exit. Ahead is a Scion TC which catches my eye for a second, but I realize that now that I have a GXP, a TC is in the "don't waste my gas" category. The Scion stops in the right lane, I take the middle and...what's that I see coming up behind...yes...a Porsche of some kind. And yes, he moves over to take the left lane. I stop a little short of the line so I can see what kind of Porsche...ah, a Cayman ...with a little "S" on the back. Perfect. He even gives a REV ! Does he know what he's doing ? So it looks like we are all going to be gunning to be first as the road necks down to 1 lane about an 1/8th of a mile ahead.

I toggle the shifter left and right to be in S1, TC on. Green. I just mash the pedal, and in a Rotofab-amplified ROAR I am outta there ! I can feel the TC trying to keep the tires in line, and I can hear Mr. Cay-man trying, but it's too late. I glance in the mirror to see if I can merge into the right (and soon to be only) lane. Mr Scion is distant memory, and Mr. Cayman S. Porsche (at least 3 cars back) looks stunned. He has just experienced "the 6.2 liter shock wave" as the guy on Top Gear put it. Perhaps he under-estimated the lowly Pontiac. If so, he might wanna think before revving on a G8 again. I dig this car.

On a side note, I took some co-workers (all car guys) for a little spin today. They were giddy when we got back. One said "that thing is a BEAST !".

This makes me smile :)

I heart this story!

Way to go !!....Congrats !

gxp and roto-fab eh, figure you puttin down at least 435 crank ?

nice story

gxp and roto-fab eh, figure you puttin down at least 435 crank ?

No intake would add 20HP

I think they are slightly under-rating the GXP hp, so as not to step on Corvette owner toes. If you know weight and trap speed, you can calculate hp and the GXP comes out to about 425. So with a Rotofab... yeah about 435-440.

First I'd like to note "crank numbers" mean nothing...that being said if you were to calculate crank numbers the 2009 gxp is 415 hp...intake only you are not gaining a whole lot...if I had to guess I would say you are at 420-425 now (thats being generous)...mods work in relation to each other...add headers midpipes and a tune and you might see another 5 or 10 hp comin out of that intake....nice kill

I think they are slightly under-rating the GXP hp, so as not to step on Corvette owner toes. If you know weight and trap speed, you can calculate hp and the GXP comes out to about 425. So with a Rotofab... yeah about 435-440.

Several GXPs have already been dynoed and the GXP is not under rated....Its pretty close to where it should be for 415 Crank HP.

nice story, had me glued

Well written, hell yeah get some!

First I'd like to note "crank numbers" mean nothing...that being said if you were to calculate crank numbers the 2009 gxp is 415 hp...intake only you are not gaining a whole lot...if I had to guess I would say you are at 420-425 now (thats being generous)...mods work in relation to each other...add headers midpipes and a tune and you might see another 5 or 10 hp comin out of that intake....nice kill

Kind of a "whatever" for me, but this might be of interest...

http://www.g8board.com/forums/showpost.php?p=204872&postcount=15

I dig this car.

Understatement of the year!!! Great kill.

This makes me smile :)

There is nothing in car-dom better than dusting a high-priced German performance car. Especially if driven by some snotty yuppie-lookin dude. (Who in real life is probably a great guy... but you know what I mean.)

probably my favorite kill yet...that is just sweet...

Porsche kills are fun! They're cars for the curves though, you take them out of their element and they are sitting ducks. If the road was curvy or it was a track(not a drag strip, a TRACK), he would have made the GXP look silly. Those Caymans are absolute monsters in the turns.

Nice story and kill. Finally one for the gxp boys

Poor Porches:whine: being whopped up on by lil'ol GXP's and slightly modded GT's rofl

I thought of buying the GXP, but the $2500 "Gas Guzzler" tax they have in St. Louis kinda turned me off so I am in a lowly GT ;)

Porsche kills are fun! They're cars for the curves though, you take them out of their element and they are sitting ducks. If the road was curvy or it was a track(not a drag strip, a TRACK), he would have made the GXP look silly. Those Caymans are absolute monsters in the turns.

I have quite a bit of track experience. In fact I was going to Firebird West today but just have too much work. I think the GXP will do just fine at the track. I look forward to seeing some Porsches there.

http://www.youtube.com/watch?v=Hro0fUGWEMo

SCCA sanctioned track events are not really racing events. They are mainly just for the drivers to get familier with their vehicles.

At least I am assumeing thats where you were....

OP, nice kill! A little out of your league. Need to go after the 997s!

I doubt a CAI is going to give 20hp. I dyno'd on a 10 degree warmer day after the CAI and got 5rwhp from it.

No only that, a stationary dyno is a bogus way of measuring hp for a device designed for airflow. Hood down from a roll is a decent way of checking.

Several GXPs have already been dynoed and the GXP is not under rated....Its pretty close to where it should be for 415 Crank HP.

I would believe that too. Do you have a source I can look at the dyno results?

Between variances in dynos, outside temps and I'm guessing if your cars are like ours, normal operating temps vs. 160-170 degree coolant temps will show 30rwhp swings in dyno results across the country.

Porsche kills are fun! They're cars for the curves though, you take them out of their element and they are sitting ducks. If the road was curvy or it was a track(not a drag strip, a TRACK), he would have made the GXP look silly. Those Caymans are absolute monsters in the turns.

Both would be SCCA T2 cars so on a higher speed track the GXP will account well for itself.

There is nothing in car-dom better than dusting a high-priced German performance car. Especially if driven by some snotty yuppie-lookin dude. (Who in real life is probably a great guy... but you know what I mean.)

Watch out, the kid in Mustang with some mods would say the same about domestic 4doors.....

Pontiac kills porshe. Good story to start off my fun filled wknd!!!:wink2:

Good kill. Im lookin forward to kickin a couple of these chargers and marauders asses down here in the hood when i get my GXP!!!:pir_flag:

SCCA sanctioned track events are not really racing events. They are mainly just for the drivers to get familier with their vehicles.

At least I am assumeing thats where you were....

Been to different kinds of events, including several Porsche club events (and they ARE nice guys...). Believe me, people are pushing. Numerous spins and off-track excursions testify to that.

OP, nice kill! A little out of your league. Need to go after the 997s!


Watch out, the kid in Mustang with some mods would say the same about domestic 4doors.....

A recent Road and Track showed a Cayman S at low 13s @ 107...not too far out-of-league !

You are right about the kid in the 'stang...you never know...

Nice kill but that was not a fast Porsche, it's only got 300hp. I'm sure you couldn't take a turbo charged 911 Porsche, now that car is fast.

Nice kill but that was not a fast Porsche, it's only got 300hp. I'm sure you couldn't take a turbo charged 911 Porsche, now that car is fast.

Well...I don't know how old it was. It looked pretty new (and they are damn nice looking too). The new ones have 320 hp and Porsche says they do 0-60 in 4.9. And Porsche is usually pretty conservative. That doesn't seem slow to me. It should take a stock G8 GT out.

A turbo ? Oh, yeah.........totally different league ! Although I have passed one on track (in my RSX-S), but just because the driver was a first-timer and was scaring himself silly.

http://www.youtube.com/watch?v=LMjLhrYZQ8k

I am in Saint Louis too Kintan. I couldnt do it either. Picked up my G8 GT Striker Blue for cost at Laura pontiac Buick in Collinsville. In a similar run down broadway on my way to work I smoked a SRT-8 Challenger by 2 lengths. Love these cars, kinda regret not getting the Monster though, I am happy with my GT.

Up to 2008 the Cayman S didn't have a limited slip diff, and it's optional in 2009. More than likely it didn't have an LSD, which makes a world of difference in a race from a dig. The Cayman S runs the quarter in the mid 13's but I'm assuming that's with the LSD. So in reality it's about even with a GT in the QM time. But considering the cost is $60K for one, the G8 is a better value in terms of performance.

Up to 2008 the Cayman S didn't have a limited slip diff, and it's optional in 2009. More than likely it didn't have an LSD, which makes a world of difference in a race from a dig.

Thanks... I didn't know that... it would explain why he went down so easily.

Gotta love all the the boo birds!

The Cayman S is a six cylinder with over 100 hp less, not really a fair race in my eyes. On paper the GXP should beat it, and as you can see it played out exactly by the book. By the way I'm not a boo-bird, I'm a red-bird fan, and they are in first place above those silly Cubs, lol

didn't have an LSD, which makes a world of difference in a race from a dig.

That has absolutely nothing to do with it whatsoever. SRT-8s and 335s are open diff cars and the only thing negatively affecting their launches is traction, torque converter (if applicable) and weight.

The LSD ONLY comes into play when wheelspin on one side exceeds wheelspin on another with "our" cars at stockish power levels.

During a launch, it makes no difference at all as open diff cars will lay down 2 stripes like any other.

Coming out of the gym, turning onto 3 lanes going east. After the next light, it narrows to one lane if you want to exit. Ahead is a Scion TC which catches my eye for a second, but I realize that now that I have a GXP, a TC is in the "don't waste my gas" category. The Scion stops in the right lane, I take the middle and...what's that I see coming up behind...yes...a Porsche of some kind. And yes, he moves over to take the left lane. I stop a little short of the line so I can see what kind of Porsche...ah, a Cayman ...with a little "S" on the back. Perfect. He even gives a REV ! Does he know what he's doing ? So it looks like we are all going to be gunning to be first as the road necks down to 1 lane about an 1/8th of a mile ahead.

I toggle the shifter left and right to be in S1, TC on. Green. I just mash the pedal, and in a Rotofab-amplified ROAR I am outta there ! I can feel the TC trying to keep the tires in line, and I can hear Mr. Cay-man trying, but it's too late. I glance in the mirror to see if I can merge into the right (and soon to be only) lane. Mr Scion is distant memory, and Mr. Cayman S. Porsche (at least 3 cars back) looks stunned. He has just experienced "the 6.2 liter shock wave" as the guy on Top Gear put it. Perhaps he under-estimated the lowly Pontiac. If so, he might wanna think before revving on a G8 again. I dig this car.

On a side note, I took some co-workers (all car guys) for a little spin today. They were giddy when we got back. One said "that thing is a BEAST !".


jbak:

Dude, that was a very good kill story. You probably were like "Freakin' Porsche Cayman S!!!" "Hell yea, he wen down!" :)

Nice work little buddy! :)

Keep the kills comin' :)

I wanna race.....

...

That has absolutely nothing to do with it whatsoever. SRT-8s and 335s are open diff cars and the only thing negatively affecting their launches is traction, torque converter (if applicable) and weight.

The LSD ONLY comes into play when wheelspin on one side exceeds wheelspin on another with "our" cars at stockish power levels.

During a launch, it makes no difference at all as open diff cars will lay down 2 stripes like any other.

Very good point, but the hope is that the wheel spinning less might still have some more traction left to give. Key word being hope.

An LSD will give a car more traction off the line than an open rear end. Why do you think the car companies use an LSD, because it sounds cool? Some of you guys sure don't know much about cars.....

Anyone ever heard of "one wheel peel"?:wink2:

Very good point, but the hope is that the wheel spinning less might still have some more traction left to give. Key word being hope.

If you get "out of the groove" and don't have an LSD AND the other wheel DOES have more traction available, that is when it helps.

An LSD will give a car more traction off the line than an open rear end. Why do you think the car companies use an LSD, because it sounds cool? Some of you guys sure don't know much about cars.....

Because of turns, getting out of the "groove" and uneven surfaces. High horsepower cars as well when traction is an issue from a roll as well.

With a surface like the dragstrip for our street cars, it makes no difference. Other circumstances, water, etc, yes.

Anyone ever heard of "one wheel peel"?:wink2:

It does suck if you get out of the groove.

I thought "one wheel peel" was from the differential being set to favor a certain wheel. And that in a true open differential both wheels should get the same distribution.

I thought "one wheel peel" was from the differential being set to favor a certain wheel. And that in a true open differential both wheels should get the same distribution.

Negative, the open differential keeps the same amount of pressure on the the gears that drive each of the wheels. When one wheel turns faster than the other, like turning a corner, the pressure on it is maintained so more power is applied to the faster turning side. Works great on smooth, dry surfaces and great for handling.

But, in poor traction conditions, such as snow, sand, mud or just too much power for the tread contact patch/surface, this is the worst possible scenario. When one of the wheels has no traction, it spins. Since the pressure is kept the same on both axle shafts, little or no torque is available on the side that is not spinning, even though it's the only wheel with traction.

It does suck if you get out of the groove.

What "groove"? The original poster was talking about stop light to stop light on a city street with questionable surfaces.

If you've ever been to Tucson you'd understand just how questionable. They seem to love patching roads instead of repaving. These patches are everywhere and are hardly ever the same level as the surrounding surface. Then you have the ever present dust and sand blowing around. Makes traction hard to come by.

That makes a LSD as good as gold around here.:)

Negative, the open differential keeps the same amount of pressure on the the gears that drive each of the wheels. When one wheel turns faster than the other, like turning a corner, the pressure on it is maintained so more power is applied to the faster turning side. Works great on smooth, dry surfaces and great for handling.

But, in poor traction conditions, such as snow, sand, mud or just too much power for the tread contact patch/surface, this is the worst possible scenario. When one of the wheels has no traction, it spins. Since the pressure is kept the same on both axle shafts, little or no torque is available on the side that is not spinning, even though it's the only wheel with traction.

OK, let me see if I'm understanding this. For example, the Charger with its open diff.

Under normal circumstances, both wheels get the same pressure applied to their side of the axle, getting the same amount of torque. But if one side of the car is in an oil slick or water or something like that, that wheel will start to spin, and since the same pressure is applied to both sides, to get it to stop spinning you have to send less power to the back (ie releasing the throttle) to get that wheel to stop slipping, thus sending very little power to the wheel that had traction.

In the same situation with the G8's LSD, the clutches would activate and allow that spinning wheel to slip, and more power would go to the wheel with traction. So not only would that wheel get more power, but the slipping wheel would get less until it stops slipping.

Factoring the Charger's electronic LSD thing in, it would apply brakes to that wheel that was slipping only, trying to get it to stop slipping, so you could still apply the same throttle. It could potentially stop that wheel from slipping, but in the end it's also wasting a lot of energy by slowing down the slipping wheel and giving both wheels the same power as opposed to just sending it to the wheel with traction.

So realistically speaking, on a well prepared track with sticky tires and you aren't spinning a tire, they'd both work the same. But if part of the track is less grippy, the LSD helps to negate it.

Is that right, or did I not follow what you were saying correctly?

In a straight line an LSD distibutes power to both wheels and an open rear end distributes power to one wheel. An LSD is also known as a posi-traction read end from the days of early muscle cars.

Pretty much. Although, you were bringing in elements of the traction control system with the brake application to the spinning wheel.

But yeah, close enough.

My old Nova II would leave a single black strip about 50' long from a stop until my friend's father helped me install a posi differential. Then it'd leave two strips about 10' long.:wink2: It never did corner that well so I wasn't losing much there.:rofl:

What "groove"? The original poster was talking about stop light to stop light on a city street with questionable surfaces.
If you've ever been to Tucson you'd understand just how questionable. They seem to love patching roads instead of repaving. These patches are everywhere and are hardly ever the same level as the surrounding surface. Then you have the ever present dust and sand blowing around. Makes traction hard to come by.
That makes a LSD as good as gold around here.:)

I understand your frustration but in those conditions 13 sec cars shouldn't be street racing whenever the surfaces are questionable. At least with the open diff, if it's slippery, you know it. With the LSD, you could catch traction and start fishtailing back and forth.

Trust me, I'd rather have LSD though. Interestingly the SRT Engineers stated that LSD will actually slow the car down ever so slightly as it goes down the strip due to torque being transitioned back and forth between the wheels.

Some of us forget about the Torque advantage the GXP will have over the Cayman too. Torque wins races.

This past Sunday I had a Boxter with a fat old guy line up beside me. He looked like he was pressed up against the Windshield, lol....

He guns it (how Gay that was) and the only reason why I didn't wax him silly was because a tinted Crown Vic was cruising the speed limit just an 1/8 ahead. If the Cop had to choose, trust me, he'd pull over my punk as_ ...

Good kill. The Scion shouldn't even of tried, what a joke...

Some of us forget about the Torque advantage the GXP will have over the Cayman too. Torque wins races.


Wellllllllllllllllll........torque at the WHEELS, yeah. But crank torque is MULTIPLIED by gearing and the Cayman will have an advantage there (since it revs higher). And that's what horsepower really means (why it's torque x revs that is).

Porsche kills are fun! They're cars for the curves though, you take them out of their element and they are sitting ducks. If the road was curvy or it was a track(not a drag strip, a TRACK), he would have made the GXP look silly. Those Caymans are absolute monsters in the turns.


uh... don't keep that sense of kill with you should you have a late model GT2 pull up beside you...:judge:

Caymans and Boxsters are girly-man cars... but if a guy is in one, he deserves to be spanked:slap:

There's definitely some nasty Porsches out there. My uncle had a 959 when I was a young kid. That thing was absurdly sick. It held the fastest production car in the world title for a little bit too if I'm not mistaken.

I actually like the Cayman. It's a very... pure? sort of sports car. I mean to get a similarly powerful midengined car is a lot more expensive. You're talking the next cheapest thing like it is the Audi R8 at 100K+

Caymans and Boxsters are girly-man cars... but if a guy is in one, he deserves to be spanked:slap:

Or congratulated on buying a world-class car with class, pedigree and a great car for the track.

There's definitely some nasty Porsches out there. My uncle had a 959 when I was a young kid.

How old are you and did he ever drive it? You know they were not allowed to be registered/licensed in the US until certified, correct?

Or congratulated on buying a world-class car with class, pedigree and a great car for the track.



How old are you and did he ever drive it? You know they were not allowed to be registered/licensed in the US until certified, correct?

I was pretty sure it was a 959, but it probably wasn't then. I was like... 4 or so, lol, I'm 22 now. I guess it probably wasn't a 959, and was just some sort of turbo 911. I coulda swore it was some sort of special model, but I don't really know. My uncle sorta has a thing for Porsches I guess, he just sold his 911 Turbo - it was the last year of the air cooled ones.