1000 HP system fitted next Monday...
Burning Brakes
Joined: Sep 2006
Posts: 1,203
Likes: 0
From: Myrtle Beach, South Carolina
Back when my friends and I were young, 10 feet tall and bullet proof growing up in west Texas we did some crazy stuff with all sorts of dangerous toys from home made canons, cases of dynamite, to airplanes flying way too low... to shooting at each other with 12 gauge shotguns "from a safe distance"...
So in the spirit and vernacular of my youth I raise a cold Dos Equis to Brett and say "YEEEHaaaaW! Go get some Dude!!
Anything you can walk away from is a victory!!!
So in the spirit and vernacular of my youth I raise a cold Dos Equis to Brett and say "YEEEHaaaaW! Go get some Dude!!
Anything you can walk away from is a victory!!!
Thread Starter
Three Wheelin'
Joined: Jun 2005
Posts: 1,741
Likes: 1
From: Bournemouth, Dorset, UK.
Hi
Thats ok lol...
138,000 but I have taken the plenum off once (well actually in my early Nitrous days it sort of popped off when my son hit a Nitrous switch while I was working on the engine
But I did put it back on again
AND its had a new cambelt/water pump so its all fine now
AND I change the plugs every 2 or 3 months (Nitrous eats plugs)
So almost brand new
All the best Brett
Rennlist Member
Joined: Dec 2002
Posts: 1,051
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Doesn't matter. The point was that the displacement is the same before and after the nitrous.
I know exactly how it works, and have since even before I started using it in automotive applications 25 years ago.
Mostly nitrogen, but it really doesn't matter since it doesn't contribute to the oxidation of the fuel, which is what makes power.
You can change the composition of what fills the glass. From a substance containing 21% oxygen, to one containing 36% oxygen. You can't get more than 12oz of 36% oxygen in there normally aspirated using nitrous though. Run liquid oxygen in your nitrous system instead of nitrous and you'll be close.
I know exactly how it works, and have since even before I started using it in automotive applications 25 years ago.
You can change the composition of what fills the glass. From a substance containing 21% oxygen, to one containing 36% oxygen. You can't get more than 12oz of 36% oxygen in there normally aspirated using nitrous though. Run liquid oxygen in your nitrous system instead of nitrous and you'll be close.
Thread Starter
Three Wheelin'
Joined: Jun 2005
Posts: 1,741
Likes: 1
From: Bournemouth, Dorset, UK.
Doesn't matter. The point was that the displacement is the same before and after the nitrous.
I know exactly how it works, and have since even before I started using it in automotive applications 25 years ago.
Mostly nitrogen, but it really doesn't matter since it doesn't contribute to the oxidation of the fuel, which is what makes power.
You can change the composition of what fills the glass. From a substance containing 21% oxygen, to one containing 36% oxygen. You can't get more than 12oz of 36% oxygen in there normally aspirated using nitrous though. Run liquid oxygen in your nitrous system instead of nitrous and you'll be close.
I know exactly how it works, and have since even before I started using it in automotive applications 25 years ago.
Mostly nitrogen, but it really doesn't matter since it doesn't contribute to the oxidation of the fuel, which is what makes power.
You can change the composition of what fills the glass. From a substance containing 21% oxygen, to one containing 36% oxygen. You can't get more than 12oz of 36% oxygen in there normally aspirated using nitrous though. Run liquid oxygen in your nitrous system instead of nitrous and you'll be close.
Not going to give a lecture on Nitrous, although people in the UK seem to like mine....
But I will give you a hint....then I am off to bed as its 3 am here
Nitrous runs at 950 psi....now what would that do to your 12 oz "theory"
Oh by the way, I did consider liquid oxygen as I have worked with it before but its a little too unstable for me
Much too risky ...I do so like to be sensible
All the best Brett and goodnight all
Race Car
Joined: Dec 2003
Posts: 4,477
Likes: 5
From: Atlanta, GA
Hi
Ah..lolllll
We call them a BOX here as in "cricket box" to protect your family jewels when a REALLY hard cricket ball is coming at you at high speed lol
Hopefully ,I wont have to do it more than once or twice (hit the 1000 hp switch) as my aim is to be "The fastest Porsche in the UK"
The new Carrera GT has a top speed of 206 and a RUF 911 has touched just under 211, so thats all I have to beat.....
I am aiming for around 220..hopefully
All the best Brett
Ah..lolllll
We call them a BOX here as in "cricket box" to protect your family jewels when a REALLY hard cricket ball is coming at you at high speed lol
Hopefully ,I wont have to do it more than once or twice (hit the 1000 hp switch) as my aim is to be "The fastest Porsche in the UK"
The new Carrera GT has a top speed of 206 and a RUF 911 has touched just under 211, so thats all I have to beat.....
I am aiming for around 220..hopefully
All the best Brett
http://videos.streetfire.net/video/C...6D0090EEE3.htm
Also, I think it would be much safer if you swapped in a 5-speed transmission with a 2.2 rear end. You would be at ~215mph at stock redline with stock tire size. Increase tire size a little and you wouldn't even need to mess with the rev limiter.
Dan
'86 928S 5-spd w/LSD
Instructor
Joined: Nov 2006
Posts: 241
Likes: 0
From: Federal Way, WA
Come on guys. Even if it didn't blow up, and I think it would, it's physically impossible to take a stock, normally aspirated, 5 liter 928 engine to 1350hp with nitrous alone. Think about it and some of the physics involved.
Here are some hints:
5 liters of displacement
normally aspirated engine
310hp when the engine is taking in air, which is right around 21% oxygen
nitrous is 36% oxygen.
What would happen if you tried to put more than 12oz of water in a 12oz glass? Would you be able to put in more than 12oz of water if you used a firehose instead of the kitchen faucet?
Here are some hints:
5 liters of displacement
normally aspirated engine
310hp when the engine is taking in air, which is right around 21% oxygen
nitrous is 36% oxygen.
What would happen if you tried to put more than 12oz of water in a 12oz glass? Would you be able to put in more than 12oz of water if you used a firehose instead of the kitchen faucet?
Amen. It's the law disimished returns reguardless of how much N2O is added.
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Michael S. Palmer
Rennlist Member
Joined: Feb 2003
Posts: 29,828
Likes: 218
From: saratoga, ca
the greatest torque will be in 1st gear, so in 5th gear, the forces are pretty mild in the tire, wheel, and CV joint department
mk
mk
Rennlist Member
Joined: Feb 2003
Posts: 29,828
Likes: 218
From: saratoga, ca
I cant even begin to count the number of factors that were left out in this proposed limitation.
for one, nascar gets near 800hp with that same 21% oxygen out of only 5 liters, plus the pesky .7liters extra.
second, what about the density! remember its cold, really cold.
If we look at the air flow, we are looking at near 500cfm at near redline.
does that 500cfm have 500cfm of 70 degree air or is it something less.
With NOS that 500cfm can made up with air density quite a bit higher. Ill have to check the charts, but i think there is no reason an engine couldnt make 2000hp if it could stay together.
mk
for one, nascar gets near 800hp with that same 21% oxygen out of only 5 liters, plus the pesky .7liters extra.
second, what about the density! remember its cold, really cold.
If we look at the air flow, we are looking at near 500cfm at near redline.
does that 500cfm have 500cfm of 70 degree air or is it something less.
With NOS that 500cfm can made up with air density quite a bit higher. Ill have to check the charts, but i think there is no reason an engine couldnt make 2000hp if it could stay together.
mk
Rennlist Member
Joined: Dec 2002
Posts: 1,051
Likes: 0
He could put a 10,000hp nitrous system on there and it wouldn't make any more power. At some point, well before 1,350hp, the maximum possible amount of nitrous will be ingested by the engine, and any more will just come blowing out of the intake tubes above the radiator. He may as well say that he's going to make 1,350hp by just putting on a 15" diameter throttle body.
Rennlist Member
Joined: Feb 2003
Posts: 29,828
Likes: 218
From: saratoga, ca
a bottle of NOS is only a couple cubic feet, yet it holds 10lbs of "air". or, 14 x 14 second shots of 50hp. OR, 14 x 7seconds of 100hp, 7 x 7 seconds of 200hp, or 7 x 1 second of 1400hp. What this means is that the entire bottle could empty in the volume available in our 5 liter engines. After all at 500cfm, is 8 cubic feet per second. If a bottle is only 1cfm, you could see that it could dump 8 times this rate if it had to. (minus the fuel that is only a 1/12th the mass of the air or NOS). Of course there is some variables there with the NOS hitting the atomosphere and turning to vapor, albeit, very cold vapor!
I think this is what Brent is illuding to.
I think at worst case, if an engine is at 100% volumetric efficiency, and its 5 liters, just using the nascar standard, we could be looking at 700hp. (minus other factors such as compression ratio, etc) But, just use this for the concept.
all we would then need to do would be to inject air that was 2x as dense as normal air. NOS, being as cold as it is as a vapor, would have no issues meeting that level of density.
simple use of gas law could give you an idea of what you would have as far as mass flow. After all thats what it is all about
Mk
I think this is what Brent is illuding to.
I think at worst case, if an engine is at 100% volumetric efficiency, and its 5 liters, just using the nascar standard, we could be looking at 700hp. (minus other factors such as compression ratio, etc) But, just use this for the concept.
all we would then need to do would be to inject air that was 2x as dense as normal air. NOS, being as cold as it is as a vapor, would have no issues meeting that level of density.
simple use of gas law could give you an idea of what you would have as far as mass flow. After all thats what it is all about
Mk
Doesn't matter. The point was that the displacement is the same before and after the nitrous.
I know exactly how it works, and have since even before I started using it in automotive applications 25 years ago.
Mostly nitrogen, but it really doesn't matter since it doesn't contribute to the oxidation of the fuel, which is what makes power.
You can change the composition of what fills the glass. From a substance containing 21% oxygen, to one containing 36% oxygen. You can't get more than 12oz of 36% oxygen in there normally aspirated using nitrous though. Run liquid oxygen in your nitrous system instead of nitrous and you'll be close.
I know exactly how it works, and have since even before I started using it in automotive applications 25 years ago.
Mostly nitrogen, but it really doesn't matter since it doesn't contribute to the oxidation of the fuel, which is what makes power.
You can change the composition of what fills the glass. From a substance containing 21% oxygen, to one containing 36% oxygen. You can't get more than 12oz of 36% oxygen in there normally aspirated using nitrous though. Run liquid oxygen in your nitrous system instead of nitrous and you'll be close.
