951 2.5L Top Speed Records?
08-20-2010, 10:09 AM
#46
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Hmm, even on a runway it's not super easy. My brother's 2.8L 951 with a big turbo and 4" exhaust broke 150 but not 160 at the Texas Mile.
Even on Top Gear those 170mph+ runs are made after turning onto the runway at speed, not generally run from a dead stop.
Getting from 60 or 80 to 150 in a mile is not so hard and that's more what we are used to. If you can hit 100 in 1/4 mile that's cool but after that you will cover the other 3/4 of a mile in 30 seconds or so.
Yes with 390HP and good traction you'd hit a ton-and-a-half in the Mile. I doubt any would with just the stock turbo and chips on gas.
-Joel.
Even on Top Gear those 170mph+ runs are made after turning onto the runway at speed, not generally run from a dead stop.
Getting from 60 or 80 to 150 in a mile is not so hard and that's more what we are used to. If you can hit 100 in 1/4 mile that's cool but after that you will cover the other 3/4 of a mile in 30 seconds or so.
Yes with 390HP and good traction you'd hit a ton-and-a-half in the Mile. I doubt any would with just the stock turbo and chips on gas.
-Joel.
I LOVE this thread!
08-20-2010, 10:57 AM
#48
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In March a Panamera turbo went 169.6 at the Texas Mile driven by a grey haired gent with the windows closed and the air conditioning on!
It was entered in "unlimited race car with turbo" so I have no idea what mods may have been done. It looked stock on the outside (not that that means anything at that event) Stock Panamera turbos make 500 horsepower. Modded ones? Your guess is a as good a mine.
Speeds above the 100 mark are all about power vs aerodynamic drag (which rises as the square of the speed) and I'll bet a Panamera has better aero than our 951's.
With our stock fairing-ed Aprilia RSV we ran out of traction, hitting the "traction=drag" wall at under 200, (175 into a 20 mph headwind) it just spun the (road race compound) tire more after that.
Our hopes for improved results this October rest on improved aero, not more power, we had enough power to go 200 already.
It was entered in "unlimited race car with turbo" so I have no idea what mods may have been done. It looked stock on the outside (not that that means anything at that event) Stock Panamera turbos make 500 horsepower. Modded ones? Your guess is a as good a mine.
Speeds above the 100 mark are all about power vs aerodynamic drag (which rises as the square of the speed) and I'll bet a Panamera has better aero than our 951's.
With our stock fairing-ed Aprilia RSV we ran out of traction, hitting the "traction=drag" wall at under 200, (175 into a 20 mph headwind) it just spun the (road race compound) tire more after that.
Our hopes for improved results this October rest on improved aero, not more power, we had enough power to go 200 already.
08-20-2010, 11:21 AM
#49
Burning Brakes
My first 951 I bought from a guy in TX. It was an 86 with a Vitesse stage 2, lindsey racing stage 1 head, 3 inch exhaust and it ran 156 mph in the Texas Mile. When I got the car, I had it dyno'd and it put down 340 to the rear wheels.
08-20-2010, 12:17 PM
#50
Nordschleife Master
Give it a try, you will be surprised. I can guarantee you anything under and honest 350+ rwhp range and you will not get it done.
If you do have that power, you will have to drive it hard, and get the car to launch decent.
Go do it and see for yourself, can be a very humbling experience!
If you do have that power, you will have to drive it hard, and get the car to launch decent.
Go do it and see for yourself, can be a very humbling experience!
08-20-2010, 03:27 PM
#52
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Without wheel spin maybe.
My recent experience at the Texas Mile suggests that the closer you get to 200 mph the more wheel spin to expect. Our data logging revealed ~30 mph of spin at 175 mph (the logging showed top gear rpm equaling 207 mph, the timing lights saw only 176.4)
These numbers aren't unique to our setup, they're typical.
BTW: the REALLLY FAST cars, (the Ford GT's and Gallardos that knock on 250 mph) are all making 1400~2000 hp at an astounding 50-65 pounds boost, with progressive boost controllers that increase boost as road speed increases to combat wheel spin before the car gets to ""The Big End" of the track.
My recent experience at the Texas Mile suggests that the closer you get to 200 mph the more wheel spin to expect. Our data logging revealed ~30 mph of spin at 175 mph (the logging showed top gear rpm equaling 207 mph, the timing lights saw only 176.4)
These numbers aren't unique to our setup, they're typical.
BTW: the REALLLY FAST cars, (the Ford GT's and Gallardos that knock on 250 mph) are all making 1400~2000 hp at an astounding 50-65 pounds boost, with progressive boost controllers that increase boost as road speed increases to combat wheel spin before the car gets to ""The Big End" of the track.
08-20-2010, 03:29 PM
#53
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Hmm, even on a runway it's not super easy. My brother's 2.8L 951 with a big turbo and 4" exhaust broke 150 but not 160 at the Texas Mile.
Even on Top Gear those 170mph+ runs are made after turning onto the runway at speed, not generally run from a dead stop.
Getting from 60 or 80 to 150 in a mile is not so hard and that's more what we are used to. If you can hit 100 in 1/4 mile that's cool but after that you will cover the other 3/4 of a mile in 30 seconds or so.
Yes with 390HP and good traction you'd hit a ton-and-a-half in the Mile. I doubt any would with just the stock turbo and chips on gas.
-Joel.
Even on Top Gear those 170mph+ runs are made after turning onto the runway at speed, not generally run from a dead stop.
Getting from 60 or 80 to 150 in a mile is not so hard and that's more what we are used to. If you can hit 100 in 1/4 mile that's cool but after that you will cover the other 3/4 of a mile in 30 seconds or so.
Yes with 390HP and good traction you'd hit a ton-and-a-half in the Mile. I doubt any would with just the stock turbo and chips on gas.
-Joel.
Most of the 200MPH + cars if not all are doing more than 150 mph in the 1/4 mile... you would need a 951 with 700 WHP to break 200 MPH in the standing mile ....
08-20-2010, 04:56 PM
#54
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Wheel spin @ 175 ? 20% wheel spin , very unlikely ..........
08-20-2010, 04:58 PM
#55
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Most of the 200MPH + cars if not all are doing more than 150 mph in the 1/4 mile... you would need a 951 with 1700 WHP to break 200 MPH in the standing mile ....
08-20-2010, 06:33 PM
#56
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1700whp is really hard to swallow... Especially when these guys did it with with ~800whp:
vividracing 997tt
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08-20-2010, 06:37 PM
#57
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08-20-2010, 07:01 PM
#58
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1700whp is really hard to swallow... Especially when these guys did it with with ~800whp:
vividracing 997tt
vividracing 997tt
08-20-2010, 08:10 PM
#59
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I only have a 170 mph club shirt, not a 200 mph club shirt.
I hope to achieve that goal in October
It won't be easy.
BTW: Our wheel spin was measured over six passes with digital data logging, not by internet warrior conjecture.
I hope to achieve that goal in October
It won't be easy.
BTW: Our wheel spin was measured over six passes with digital data logging, not by internet warrior conjecture.
08-20-2010, 08:20 PM
#60
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A 997 has much better rear wheel traction due to the engine being in the back (wrong) end of the car. A high powered 951 will launch poorly in comparison, remember it's a one mile drag race.
To go fast in a 951 you're going to have to make all your speed at "the big end" of the track. Maybe 1700hp won't be required to go 200, perhaps it will only take 1200 or so.
Until one of us tries it, we'll never know.
The thing I DO know is that the few cars that knock on 250 mph are making 1400~2000 hp in aerodynamically slippery bodies (Gallardos and GT's)
To go fast in a 951 you're going to have to make all your speed at "the big end" of the track. Maybe 1700hp won't be required to go 200, perhaps it will only take 1200 or so.
Until one of us tries it, we'll never know.
The thing I DO know is that the few cars that knock on 250 mph are making 1400~2000 hp in aerodynamically slippery bodies (Gallardos and GT's)