Nitromethane as a power adder?

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Dec 21, 2006 | 08:28 AM

#61

Adrenaline_Z

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From: K-W, Ontario

Quote:

The S.C.R of top fuel engines is ~7.0:1

But...they also push about 60 PSI of boost which is an incredible amount
of pre-spark cylinder pressure.

Dec 21, 2006 | 09:08 AM

#62

Big-DEN

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We know alot of thee motors will how 180-210PSI on the compression teter when turning the motor via the starter motor? What that 200RPM MAYBE?

How many PSI in a running cyllinder at 7000RPM?

What about what is greatest PSI on combustion?

Dec 21, 2006 | 09:41 AM

#63

Adrenaline_Z

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From: K-W, Ontario

Quote:

We know alot of thee motors will how 180-210PSI on the compression teter when turning the motor via the starter motor? What that 200RPM MAYBE?

Depending on the valve timing and SCR, that's about common for the average
street motor. That really doesn't tell us much other than the uniformity across
all cylinders. Compression tests do not indicate the cylinder pressures once
fuel, heat and RPM come into the equation.

Quote:

How many PSI in a running cyllinder at 7000RPM?

Pre spark? No idea, but you would surely have to know the VE numbers to get
a clue. Even use a dyno graph and work from the values to calculate the unknown.
That would not be an option for a top fuel motor however. As far as I'm aware,
there isn't a dyno on earth that can handle that sort of power.

Quote:

What about what is greatest PSI on combustion?

The average street motor on pump gasoline N/A is approximately 1100 PSI
upon combustion near TDC. This will fluctuate as VE changes.

Last edited by Adrenaline_Z; Dec 21, 2006 at 03:21 PM.

Dec 21, 2006 | 12:14 PM

#64

Jordan S.

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I know a guy that runs it with his gas in his chevelle. He said he had to do some tuning with it.

On the bottle of the stuff it says "Colder Plug is recommended" "Will resist pre-detonation". Two things that kind of contridict each other.

But as far as carrying its own oxygen that kind of intrests me. I'm not sure if it was NitroPropane or NitroMethane.

Nitromethane is what I think is run in R/C cars, that ****'s about like desiel fuel how it will burn, atleast from my expereince. It literally burns cold.

Dec 21, 2006 | 01:48 PM

#65

Big-DEN

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Wait, Im laughing hard...

You said, that guy is running nitromethane in his car with race gas AND NITROUS?

ANd all it says on the bottle is "Colder Plug is recommended" "Will resist pre-detonation". ?

Dec 24, 2006 | 12:36 PM

#66

squealingtires

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From: Dayton, Ohio

Quote:

Originally Posted by Adrenaline_Z

That would not be an option for a top fuel motor however. As far as I'm aware,
there isn't a dyno on earth that can handle that sort of power.

I'm sure there is something that could be rigged. Think about a large power plant -->Huge shaft driven generators

http://www.solar.coppe.ufrj.br/itaipu.html

Conversion reference.
715 megawatt = 958,830.796 horsepower [international]

Now it wouldn't make any sense for someone to build a chasis roller dyno for this application if that's what you were getting at

Dec 27, 2006 | 04:45 PM

#67

Wnts2Go10O

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From: Rockville, MD

Quote:

Originally Posted by squealingtires

Now it wouldn't make any sense for someone to build a chasis roller dyno for this application if that's what you were getting at

so, you would just use a generator setup and measure the amount of power yu generate and use the formula to translate into hp. interesting...go build one