How much HP do we really Have
#1
Intermediate
Thread Starter
How much HP do we really Have
I thought some of you might be interested in the following link:
www.stealth316.com/2-calc-hp-et-mph.htm
You can pick any of the performance data that's been published for 1/4 mile speed, Et, Weight, Hp and play around with the formulas and see what you end up with for rear wheel HP.
I have seen weights ranging from 3135 to 3153. You would need to add in the weight of driver and a minimum of gas.
I have seen 1/4 mile speeds in the 125/126 range, and ETs in the 11.2s.
There are a lot variables that come into play in an actual car test. Most of these are small as compared to weight and HP. They will produces variances from the prediction however.
Nonetheless these mathematical models of performance suggest we may have significantly more HP than 475.
Remember, This is just for fun.
www.stealth316.com/2-calc-hp-et-mph.htm
You can pick any of the performance data that's been published for 1/4 mile speed, Et, Weight, Hp and play around with the formulas and see what you end up with for rear wheel HP.
I have seen weights ranging from 3135 to 3153. You would need to add in the weight of driver and a minimum of gas.
I have seen 1/4 mile speeds in the 125/126 range, and ETs in the 11.2s.
There are a lot variables that come into play in an actual car test. Most of these are small as compared to weight and HP. They will produces variances from the prediction however.
Nonetheless these mathematical models of performance suggest we may have significantly more HP than 475.
Remember, This is just for fun.
#4
Race Director
I thought some of you might be interested in the following link:
www.stealth316.com/2-calc-hp-et-mph.htm
You can pick any of the performance data that's been published for 1/4 mile speed, Et, Weight, Hp and play around with the formulas and see what you end up with for rear wheel HP.
I have seen weights ranging from 3135 to 3153. You would need to add in the weight of driver and a minimum of gas.
I have seen 1/4 mile speeds in the 125/126 range, and ETs in the 11.2s.
There are a lot variables that come into play in an actual car test. Most of these are small as compared to weight and HP. They will produces variances from the prediction however.
Nonetheless these mathematical models of performance suggest we may have significantly more HP than 475.
Remember, This is just for fun.
www.stealth316.com/2-calc-hp-et-mph.htm
You can pick any of the performance data that's been published for 1/4 mile speed, Et, Weight, Hp and play around with the formulas and see what you end up with for rear wheel HP.
I have seen weights ranging from 3135 to 3153. You would need to add in the weight of driver and a minimum of gas.
I have seen 1/4 mile speeds in the 125/126 range, and ETs in the 11.2s.
There are a lot variables that come into play in an actual car test. Most of these are small as compared to weight and HP. They will produces variances from the prediction however.
Nonetheless these mathematical models of performance suggest we may have significantly more HP than 475.
Remember, This is just for fun.
#5
Rennlist Member
Ive estimated total weight of Sabines car with half tank of gas using specific gravity cals and an estimate of her weight clothed at 3351 lb assuming the car is stock with buckets and no cage.
The only solid facts we have from Sabine video are the 0-400 time of 11.2s. 1/4 mile is 402m
As we can fairly accurately calculate the weight of the vehicle (1520kg) with an assumption on Sabines weight clothed =68kg the Hales calculation is the most conservative at 471 BHP and plating with the others we see anything from 510 bhp upwards (using 122 mph as trap speed).
As the formulas all produce quite different results its hard to tell which is the most accurate (as we are missing data on relative humidity, traction surface and ambient temperature amongst others).
However, I think its safe to say at the very least we have the full 475 bhp. My experience at the track suggests its about right when compared to a colleague running a 997.2 GT3.
The only solid facts we have from Sabine video are the 0-400 time of 11.2s. 1/4 mile is 402m
As we can fairly accurately calculate the weight of the vehicle (1520kg) with an assumption on Sabines weight clothed =68kg the Hales calculation is the most conservative at 471 BHP and plating with the others we see anything from 510 bhp upwards (using 122 mph as trap speed).
As the formulas all produce quite different results its hard to tell which is the most accurate (as we are missing data on relative humidity, traction surface and ambient temperature amongst others).
However, I think its safe to say at the very least we have the full 475 bhp. My experience at the track suggests its about right when compared to a colleague running a 997.2 GT3.
#6
Rennlist Member
Does Porsche know?
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#9
Race Director
^ But keep in mind Porsche has put together a pretty unique package. Meaning, it is how the horsepower is delivered and when. Plus, you have to factor speed of shifts which knock tenths off the equation. So, I do think 475 may be conservative but there are still factors that Porsche did in the 991 that helps it's straight line speed. actually, this car has me a little stumped. There are few cars you can actually compare this to. And I am not talking about the raw performance numbers. It is just how this car gets there which is fascinating.
#12
^ But keep in mind Porsche has put together a pretty unique package. Meaning, it is how the horsepower is delivered and when. Plus, you have to factor speed of shifts which knock tenths off the equation. So, I do think 475 may be conservative but there are still factors that Porsche did in the 991 that helps it's straight line speed. actually, this car has me a little stumped. There are few cars you can actually compare this to. And I am not talking about the raw performance numbers. It is just how this car gets there which is fascinating.
#14
Rennlist Member
It feels like 500.
Remember Car and Driver timed the GT3 0-60 in 3 seconds flat (as in 3.0 seconds), and the quarter mile in 11.2 seconds at 126MPH.
When guys ask me how much HP the car has, I just say 500.
Remember Car and Driver timed the GT3 0-60 in 3 seconds flat (as in 3.0 seconds), and the quarter mile in 11.2 seconds at 126MPH.
When guys ask me how much HP the car has, I just say 500.
Last edited by Drifting; 09-03-2014 at 12:23 AM. Reason: .
#15
Race Director
^ One thing for certain; - How many cars with 475 hp weighing around 3300 lbs can do the quarter mile in 3.0??
I kind of understand what ToyGuyAZ is conveying.
I kind of understand what ToyGuyAZ is conveying.