I was there Saturday morning from 9:30 am until 2:30. They let me keep the car in the garage until it stopped raining.

 

isn't a stock 996 GT3 around 380 crank HP? with a 15% driveline loss, that's around 323 rwhp.

at 360 to the wheels and a 15% driveline loss, that translates to 424 crank HP.

here is an article from C&D discussing the GT3 and 2 HP #'s:

http://www.caranddriver.com/previews...e-911-gt3.html

and a snippet:

With a spring arrival of the 2004 Porsche 911 GT3—and the introduction of the outrageous Carrera GT supercar later this year (see page 68)—Porsche is reasserting its position as a premier sports-car builder. Could this year's offerings be penance for its Cayenne sport-ute?
Maybe not, but the GT3 is a 911 to brag about, a naturally aspirated, 375-hp version of the $183,765 twin-turbocharged, 456-hp Porsche 911 GT2. It will sell for about $84,000 less than the GT2—figure an even $100,000—and will fill the rather wide performance and price gap that existed between the $82,565 911 Carrera 4S and the $118,265 911 Turbo. Now there's a vast array of 911 models, from the base $69,365 Carrera to the extravagant GT2.


The GT2 was and is Porsche's response to those who suggest that the 911 Turbo is a soulless high-speed appliance. On Porsche's scales the GT2 weighs about 220 pounds less than the Turbo because it doesn't have the Turbo's four-wheel-drive system. It also makes more horsepower (456 versus 415).

sounds like the dyno up at TPC might be a bit optimistic

 

I think the drive train loss for a Porsche is more like 10 to 12 percent. Hey, that's not me saying it, argue with Mike at TPC. I tend to believe a guy that races them for a living. I can say that I've seen a stock Gt3 run 345 to the ground. He has seen higher, but not all of them ran 355 to 360. It is what it is, if you believe it. If you don't, then at least I took the time and posted a dyno for consideration and speculation. As far as I know, I don't know anyone else that has run a stock Gt2 for dyno results. If a Gt3 is slightly underrated, and perhaps the true number is 405 to 410 crank horsepower and it loses 10 to 12 horse to the wheels, then we are right at the number. Worst case scenerio 340 best case 360. BTW, that same dyno tested a stock c5 Z06 claiming a factory 405 hp at the crank, it dynoed at 335 RWHP. So is the TPC dyno Porsche prejudice?

 

i don't think you're lying, i just think their dyno reads a little high. here's a dyno chart for a stock K24 factory setup from evo's site (under the GT2/X50/TTS section) for comparison. it also shows their ECU, ECU with headers, and ECU with headers and intake. the most power they make is 446, and that's with the upgrades.

the only numbers that are important are the before and afters. just make sure you use the same dyno when you get your ecu back. don't pay too much attention to your baseline.

 

DD dog,
Most stock GT3's dyno closer to 400hp crank. Porsche always under promises and over deliver with the Gt cars.

 

post a dyno up of your car.

 

I don't need to dyno it. I know what it has and I know what all other dynoed stock 996 GT3's (like mine) do.

 

it's $50. go run it.

do you have any charts for a stock GT3? i don't think i've ever seen one.

 

Dyno's don't really mean **** to me though. What is more important is what it can do on the track. My car is stock. I might take it to the 1/4 next month. Now that it is properly dialed in, I can post up my trap speed. That will give a better understanding of what the car has/can do that a dyno IMO.

 

hey, if you don't have the $50 for the dyno, just say so. you don't have to give me the long windy explanation about drag racing a stock GT3

besides, according to your logic, what's the point? couldn't you just look and see what every other stock GT3 did in the 1/4?

 

You are right. I don't have the $50. My long winded expination was to explain to you that Dyno's are not the best way to accurately measure a cars HP. You should take your car to the Drag Strip and see what it traps at. I think you will be surprised. Its only $20.

 

It's more than 50 bucks bro. Is that EVO dyno a stock TT with 415 hp? It doesn't indicate that it's a x50 on the dyno. Was it an AWD run? You definitley lose alot when you put her on an AWD Mustang dyno. You're right, I just wanted a baseline run to have as a measuring stick after I put on the mods. You didn't answer my question though. TPC has dynoed other cars and they have shown 20 percent drivetrain loss, (c5 Z06 dynoed at 335 RWHP) does the machine just prefer Porsches? I did 7 runs over the course of 3 hours and she always put down between 434 and 443 RWHP. I believe a guy on the other forum posted his Gt3 run and it pulled 335 to the wheels. As I stated earlier, it's as accurate of a number absent a trap speed, which is forthcoming. Maybe then the numbers will speak for themselves. BTW, you believe EVO over me? I'm insulted.

 

argghhh, my spell check wents nuts and ruined my reply to your last post so i had to delete it. i have to remember to turn it off before i hit reply as it moves the text all over the place if you submit it with the spell checker on. i'm too tired and far too lazy to retype it, but you can read it in the email autoreply.

without going into all my math again, did you buy your car new? if it was used, maybe somebody already put a software package in it. that would explain the significant numbers over what a stock car should be.

 

Dyno numbers can be manipulated ... I know first hand... seen it many times at the shop.
However, I'm not disagreeing with 9elevens' figures... if thats the case its alot....
I raced a friends x50 with my evo8 on low boost( 393 awhp on a mustand 4 wheel dyno).... and I had about a car on him.... thats it...
markski

 

These aren't significant over what stock should be. It is common knowledge that Porsche under-rate their cars. Thay always have.

I wish my car had a torque curve like that