Z

Mark,

A lot of factors were left out, and pretty much all of them would reduce that maximum potential horsepower from nitrous alone even further. If you really believe that 2,000hp with nitrous alone on any stock 928 engine, even if it held together, is possible, you understand even less about this then Brett.

It's pretty clear that any chance of explaining it to you guys is pointless. It just cracks me up when people who don't even understand the basic physics and what's involved start talking about making more than three or four times or more horsepower than the most that their 928 ever has.

Will Brett hit 220mph? Maybe. Will the engine stay in one piece? I doubt it, but kind of hope it does. Will it make 1,350hp? Without question, no.

Just do me a favor and get lots of video when you guys make that 1350-2000 horsepower. Well, at least get one really short video when you try it anyway.

atb

Brett, better bring your sunglasses dude.

john gill

Drive it like you stole it , when it breaks fix it ,

I for one will be interested in what breaks & lets go , & at what !!

John Speake

Hi Brett
Are you going to do any dyno work before your max speed run ?

Mike Simard

Wouldn't that involve obeying traffic laws and being inconspicuous so as not to attract attention?

marton

Interesting discussion

I had a look around the net to try & find some more detailed technical information about NOS systems. I found the following, see link, which gave a good intro for me (not intended for the experts who know this stuff & more)

http://www.holley.com/data/TechServi...ech%20Info.pdf

Marton

heinrich

...

Brett928S2

Hi John

Good question. but probably no, I dont think they can hold it down well enough to be honest...

The last time I dynoed with just over 500 hp in total they used every strap in the place and it nearly launched, so I hate to think what would happen with over 1300 hp

Also most Uk dynos wont go that high

All the best Brett

hacker-pschorr

You need to find a better dyno, it's pretty routine to see 1000+ rwhp on the dyno we use.

Daymon66

does anyone remember the "macgyver show"??

Candleman

Yeah man! MacGyver could do it! One bicycle tire pump in drivers floor board w/ tube to intake manifold, a box of Chinese Thunderstick firework rockets and some duct tape.. 1300Hp easy. Or just find a used "Turbo Boost" button from an old NightRider car. That will actually make you catch some serious air Dude.

bcdavis

For those of you who haven't read any of Brett's earlier posts, one thing you need to realize, is that he is not intending to just suddenly dump 1000 horsepower all at once into the drivetrain. He's planning on a progressive controller, so it will slowly ramp up the horsepower. I'm not saying it won't be a strain on the internal components. But there is a big difference between suddenly unleashing 1000 extra horsepower all at once, and slowly adding it 100 horsepower at a time, over the length of the run. It's similar to slowly pressing on the accelerator, versus dumping the clutch and mashing the gas, which is what some of you seem to think he is planning on doing. If you dump the clutch, and jam the gas, you will break things even on a stock engine. But will you break things if you gently accelerate? Not usually. That's because you are gently increasing the power. Which will also help with the wheel slip, etc.

V2Rocket

water doesnt compress

Vlocity

I was putting Nitros on Snowmobile engines 10 years ago......the problem wasn't getting the nitros it was getting enough fuel. We were making 185 CHP out of a .670 liter Rotax motor. We had to add an additional fuel pump and a spare fuel tank with premix in it since the motor was direct oil injected in order to get enough fuel.

At 7000 RPM if you had the Nitrous bottle off and just hit the switch (which would then dump only fuel and no nitrous) it was so much additional fuel that it would kill the motor dead.

I'm a non-believer until I see how this is set up. I can't invision a setup that would flow enough fuel to support this kind of HP, again adding the Nitrous is the easy part. The key is not turning the inside of the cylinder into a small "cutting torch".

Ken

ShawnSmith

Regarding the physics-debate on how much air or nitrous one can put in a given displacement:

Assuming the motor remains normally aspirated and the intake runs at room temperature, the upper limit on how much nitrous you can put in there is relatively modest.

The two obvious ways around that problem would be to either chill the intake charge or arrange some kind of plumbing that allowed for nitrous forced-induction. At that point, with low enough temps or high enough pressures, the limit on how much gas can be put in is very high.

Cold intake seems quite do-able.

High pressure nitrous force-feeding seems a little less clear, unless the thing will run pure nitrous and thus allow the normal air intake path to be sealed for the force-feeding...

$0.02