Nitrus

[Mag7C]

The engine went from a couple thousand rpm below redline, to a couple thousand above redline in less than a second. That was about the time that the motor detonated itself all over the track. There were actually holes in the case that were big enough to put my fist through. Overall, it was quite a spectacular display.

I actually laughed reading this. I feel sorry for the guy... but that would be quite a sight.

[oldnslo]

Izzat anything like nitrous? Very potent stuff, good for short bursts of power, god help you if you leave the bottle on too long.

[flynrider]

I actually laughed reading this. I feel sorry for the guy... but that would be quite a sight.

That's OK. I and many others laughed too (even while feeling sorry for the guy). You see, one of the characteristics of the inline 6 on the CBX was that its numerous small cylinders would allow it to rev to high rpms unusually quickly. In the upper third of the rpm range (on a stock bike) the tach needle moved from the mid 6000s to the 9.5K redline almost as fast as you could shift it. While not a horsepower giant, this characteristic made the bike a very good performer at the dragstrip.

After explaining to our dear misguided pal that installing a nitrous boost on a fast revving, twitchy six cylinder engine might not be such a good idea, he brushed us off and opened his wallet. We weren't that surprised when the engine exploded, but we had expected it to last for at least a few passes before it was trashed, instead of just 20 yards.

[Uncle_Bob]

nAAAAAwwwwwwwZZZZZ makes the car go faster also add lots of vinly stickers for extra 15HP!!!
I belive having NOS hooked up legally or illegaly is a state law and varies but dont quote me on that. It is VERY important to get NOS and fuel mixture right, otherwise you will get melted pistons. I work at a scrap yard, i drilled holes in the intake and shoved Nos in there for care and giggles to see what happnes, and boy oh boy those pistons melt migthy fast the the next thing you hear is the rattling noise of crakshaft spinning with whats left of rods and pistons, well it kinda jams to a stop.

[jmillheiser]

you MUST have more fuel with a Nitrous setup. What the nitrous does is give you more O2 to burn more fuel. Without the extra fuel you just go super lean and start melting pistons.

Those Dry systems you hear about are for fuel injected cars where the FI system is used to provide the extra fuel, this is accomplished by plumbing nitrous bottle pressure into the fuel pressure regulator spiking fuel pressure.

I prefer turbos/superchargers myself. That way you get the extra power every time you step on the gas and usually at a nice low RPM too.

Its actually rare to see a production turbo or SC engine redline much higher than 6500RPM or so, car manufacturers set up their turbos for low end torque which makes for a very street friendly engine.

I only know of one high revving turbocharged production car engine and that is in the Nissan Skyline GTR, that lil beastie revs to 9500rpm and has 2 moderately sized turbos. This is because it is designed like a motorcycle engine, big bore, short stroke, lightweight but strong internals, this engine can produce 700hp from the stock bottom end with only 2600CCs of displacement.

[Ninja Geoff]

you MUST have more fuel with a Nitrous setup. What the nitrous does is give you more O2 to burn more fuel. Without the extra fuel you just go super lean and start melting pistons.

Those Dry systems you hear about are for fuel injected cars where the FI system is used to provide the extra fuel, this is accomplished by plumbing nitrous bottle pressure into the fuel pressure regulator spiking fuel pressure.

I prefer turbos/superchargers myself. That way you get the extra power every time you step on the gas and usually at a nice low RPM too.

Its actually rare to see a production turbo or SC engine redline much higher than 6500RPM or so, car manufacturers set up their turbos for low end torque which makes for a very street friendly engine.

I only know of one high revving turbocharged production car engine and that is in the Nissan Skyline GTR, that lil beastie revs to 9500rpm and has 2 moderately sized turbos. This is because it is designed like a motorcycle engine, big bore, short stroke, lightweight but strong internals, this engine can produce 700hp from the stock bottom end with only 2600CCs of displacement.

Dry systems suck, the chance of the middle cylinders getting more nitrous than the outer ones (ie piston 2 and 3 on a 4 banger) is too great. And that leads to breakage. Go for a wet system at least. Direct port if you can afford it.
PS - The RB26DETT is durable, but i duno about it being THAT durable. And superchargers power throughout the RPM range whereas turbos don't really kick in til a few thousand RPM. Not enough preasure from the exhaust to spool it up until then.

[jmillheiser]

the operating RPM of a turbo depends on the size of the turbo compared to the size of the engine. There are some that are fully spooled by 2000rpm (this is low rpm for most modern performance engines).

The RB can make 700hp on its stock bottom end, just not for long. with piston/crank/conrod upgrade they can make 700hp and be reliable and then become capable of producing 1000+ hp for short periods. Remember most skylines that have been imported to the US are poorly sorted out in the tuning deptartment when built up. US tuners dont know the tricks that the Japanese tuners have used for years (and dont share willingly).

Also remember most Skylines in the US are tuned to run 91 octane not the 98 octane that is standard in Japan. 550hp (200hp/liter) is about the limit on most import 6 cylinders on 91 octane pump gas. Most USCC competitors run C16 race gas and switch to a different much lower power fuel map if they HAVE to run pump gas.

Compare that to the new Yammie R6 which produces OVER 200hp/liter (133bhp is the official power number for the '06 R6) WITHOUT forced induction, and will run on 91 octane pump gas all day long. That specific output in say a chevy 350 small block equals 1150bhp and 1600hp from a 454 big block.

Still doesn't hold a candle to an F1 engine which has a specific output of 300hp/liter (900hp from a 3000cc engine) again without forced induction. Though there were 750hp/liter engines in F1 during the 80s (1000hp from 1500cc) these used very large turbos.

[Ninja Geoff]

the operating RPM of a turbo depends on the size of the turbo compared to the size of the engine. There are some that are fully spooled by 2000rpm (this is low rpm for most modern performance engines).

The RB can make 700hp on its stock bottom end, just not for long. with piston/crank/conrod upgrade they can make 700hp and be reliable and then become capable of producing 1000+ hp for short periods. Remember most skylines that have been imported to the US are poorly sorted out in the tuning deptartment when built up. US tuners dont know the tricks that the Japanese tuners have used for years (and dont share willingly).

Also remember most Skylines in the US are tuned to run 91 octane not the 98 octane that is standard in Japan. 550hp (200hp/liter) is about the limit on most import 6 cylinders on 91 octane pump gas. Most USCC competitors run C16 race gas and switch to a different much lower power fuel map if they HAVE to run pump gas.

Compare that to the new Yammie R6 which produces OVER 200hp/liter (133bhp is the official power number for the '06 R6) WITHOUT forced induction, and will run on 91 octane pump gas all day long. That specific output in say a chevy 350 small block equals 1150bhp and 1600hp from a 454 big block.

Still doesn't hold a candle to an F1 engine which has a specific output of 300hp/liter (900hp from a 3000cc engine) again without forced induction. Though there were 750hp/liter engines in F1 during the 80s (1000hp from 1500cc) these used very large turbos.

Part of the high HP, low displacement thing is high revs and in the case of the F1 cars or a sport bike, high compression. It's truly amazing that they get so much power out of such small engines. Imagine a 454 big block that revs to 9,500 RMP with a 12:1 comp ratio, DOHC, EFI, early/late cams, variable timing, etc. Now supercharge it.... Though to SC it, you'd want to lower the comp ratio.

[pursang]

Anyone here have a bike with nitrus? Seems insane to me. I havent gone faster than 60 and even then i still feel like im going pretty fast and, no way i want to have an uber bike and throw something like nos on it. Do you need a EFI or can you do it on a carded bike? Does it harm your engine? Speakin of speeds how fast have you guys gone?
Just curious

Thanks


JWF

I have NOZ on my 82 XV 750 Chopper, see the Yamaha photo gallery for pics.

[CustomZ]

I say forget the nos and get a turbo. If you want power why not have it there all the time?!? but why do we all always want to go faster? i don't know but i like it! I've gone 248kph(155mph) on my stock 04 gsx-r 600