with $150 thousand, you can do anything!

[denn454]

whats expensive as a house and makes 29# of boost from the factory (yes 29#)? porsche 911 gt2. i'm not much into these super high dollar exotics, i'll never own one, even if i had the money for one its kind of a waste, but I was readins gomething about it and 29# of boost really caught my eye. i know thoes are VERY well designed and well built engines, but even with that how is it possible to get 29# on pump gas? not only that how is it possible to just make that kind of boost from a turbo that doesn't have the lag of a thrust only powered jet engine?

 

[TurboRegal84]

The Porshe GT2 is a VERY nice 'exotic' but the sight lines for driving on the street are very poor. Im not sure on the boost, but you feel all 400+ HP in EVERY gear car feels super solid at 80+mph.....and best of all it can put the power to the ground.


The Porshe is nice, but have you ever seen or driven a BMW M5? The M5 is hands down an excellent street car! Load of power in every gear from a standstill to 70+ MPH on the freeway! Sight lines are great, and it handles its weight very well in the corners. Compared to the GT2 the BMW is pocket change starting at around $78K!

 

[Justin Terry]

My friends dad who is rich has one and it ran like a low 8 in the 1/8th. Are you sure they have that much boost. Plus I dont think this guy could drive. I tried to race him in my buick but he said naw.

 

[azgn]

no way in hell do they run 29 lbs of boost!

more like 15 psi or 2 bar (max) That would be one atmosphere (@14) plus another........

 

[peterkin]

2 bar is 14.7 psi * 2 = 29.4 psi total!! am i right?

 

[UNGN]

Originally posted by peterkin
2 bar is 14.7 psi * 2 = 29.4 psi total!! am i right?

No. Bar is absolute. Boost starts at 14.7.

The Porsche has about 15 psi of boost.

At 29 psi of boost it would make 600-700 HP If it could handle it.

 

[Weazel]

Originally posted by UNGN
No. Bar is absolute. Boost starts at 14.7.

The Porsche has about 15 psi of boost.

Yep, UNGN is right on. The krazy krauts (haha) like to use absolute pressure in BARs. My friend and I saw 1.8 bar on his stock Audi 200 Quattro Turbo's boost gauge, and just about soiled ourselves. Then after reading up, that's atmospheric plus 0.8 bars (11-12 psi). Respectable, but not exactly 25 pounds of boost in factory trim

If it were 29 psi of actualy boost (over atmospheric) on pump gas the thing would have to be like 4:1 compression.

 

[peterkin]

you learn something new everyday! thanks

 

[TurbolessRegal]

All about absolute vs gage pressure...

absolute pressure= atmospheric (14.7psi)+gage pressure (what you measure). Damn, don't I remember that all from doing calculations in fluid mechanics

 

[denn454]

I don't remember where i saw that, some magazine, don't remember where or which one. they also said the 911 turbo makes 22# so i don't know how accurate they are. how could you really put 400hp to the ground, the gt2 is only 2wd, i don't know why they did away with the 4wd for it, they said it only took off 200 lbs, which when you concider the loss of traction doesn't make sence, unless its designed to be a top end only car, then traction doesnt' really matter much.

 

[UNGN]

Originally posted by denn454
I don't remember where i saw that, some magazine, don't remember where or which one. they also said the 911 turbo makes 22# so i don't know how accurate they are. how could you really put 400hp to the ground, the gt2 is only 2wd, i don't know why they did away with the 4wd for it, they said it only took off 200 lbs, which when you concider the loss of traction doesn't make sence, unless its designed to be a top end only car, then traction doesnt' really matter much.

The porsche can put 400 (or even 600) Hp to the ground because 60% of the cars weight is on the back tires.

GN's manage with only 43%