2quick4u

Yeah Chris we were just having fun with the rocket fuels. They are nasty and dangerous stuff and require very specialized handling procedures and equipment for safety.

As far as alternative fuels go, I was thinking about mentioning Nitropropane and Propylene Oxide, but you beat me to it. As you mentioned, Nitromethane does not readily mix with gasoline, it mixes with Methanol. However, you can use an ester like amyl acetate to get the Nitromethane to mix with gas. Nitropropane would be the better choice though since it readily mixes with gasoline. It is also interesting to note that nitro-parrafins, like Nitropropane and Nitromethane, drive down the octane of the resulting mixed fuel blend. They also contain enough of their own oxygen, that in pure forms, they can act as a mono-propellant, thus needing no added oxidizer like air to burn.

[ December 12, 2001: Message edited by: 2quick4u ]</p>

Stu'sWS6

iTrader: (3)

I have tried Propylene Oxide-mixed at about 10 percent I didn't see any gains. Have any of you guys heard of polypropylene oxide??? A friend of mine tried it back in 1998 when he first purchased his ls1-the car picked up quite a bit. I was trying to find the same thing when I purchased the propylene oxide from my VP fuels rep.
new to the board
Travis

cablebandit

iTrader: (37)

I use Xylene as well with a 70/30 mix with 93 octane to give me approx. 100 octane.

LIL SS

iTrader: (9)

I'm new to this part so please ignore my ignorance.

California gas is 91 octane at the pump.. Now I am trying to figure out how to get that up to 100 octane using both Xylene and Toluene. I'm lost on figuring this out.. Please explain how to do the eqaution in terms my simple mind can understand. I'm not a rocket scientist.. Thanks guys..

Crazyquik

Xylene is 116.5 octane (according to installuniversity, which references 2quik4u). For 15 gallons of 100 octane you'd need ~9.5 gallons of 91 octane mixed with ~5.5 gallons of xylene.

The formula is (Gallons of one fuel x Octane)+(Gallons of other fuel x Octane). Then divide the answer by how many total gallons. I started off with 10 gallons of 91 and 5 of 116.5 (Xylene) and ended up over 100 octane, so I went back and moved the numbers around some. Hope this is broken down far enough, I'm not too good of a teacher <img src="gr_sad.gif" border="0">

(9.5 x 91) + (5.5 x 116.5) is the (gallons times octane) + (gallons times xylene)

Divide all that by 15, because 9.5+5.5 is 15 gallons. Or you can divide by whatever amount the gallons add to. That should yeild 100.4 octane.

edit - seems that turbo buick page says xylene is 117 octane, that would mess my numbers up.

J.

[ December 13, 2001: Message edited by: Crazyquik ]</p>

Crazyquik

Ok, Toulene is 114 octane. 9 gallons of 91 and 6 gallons of Toulene would be 15 gallons of 100.2 octane.

Or if toulene only comes in 5 gallon jugs, mix 5 gallons of toulene with 8 gallons of 91 to get 99.8 octane.

J.

LIL SS

iTrader: (9)

With the information provided by others, I have put together an excel spreadsheet for everyone on this. This is how it works.

Tables are set up so you input:
Gas you are using (Octane)
Price you pay per Gallon.
how many gallons of gas to additive

Then it tells you:
Combined octane rating
% of mixture
Cost per Gallon

If someone wants to post it I can e-mail it to them. It might be helpfull to others..

Crazyquik

I think I have enough space to host it.

crazyquik@yahoo.com

LIL SS

iTrader: (9)

I put together a spreadsheet for everyones use. If someone would like to post it, I will e-mail it to them.

User puts in:
Gal of gas
Gal of Xylene/Toluene
Rated pump octane
Cost of Pump gas and cost of Xylene/Toluene

Spreadsheet tells:
Octane level
% of mixture
Total gallons
total cost

ChrisB

email it to chris@slowcar.net and I will host it for you.

Chris

ChrisB

[quote]Originally posted by LIL SS:
<strong>I put together a spreadsheet for everyones use. If someone would like to post it, I will e-mail it to them.

User puts in:
Gal of gas
Gal of Xylene/Toluene
Rated pump octane
Cost of Pump gas and cost of Xylene/Toluene

Spreadsheet tells:
Octane level
% of mixture
Total gallons
total cost</strong><hr></blockquote>


Here ya go
http://www.slowcar.net/shared/octanechart.xls

chris

Crazyquik

Nice work <img src="gr_stretch.gif" border="0">

BTW Chris, do you still have your spreadsheet for rod length up? I thought I had saved it but evidently not. Anyone else have any cool spreadsheets like this to share? I've got the one about LS1 displacement combinations.

J. <img src="graemlins/gr_chug.gif" border="0" alt="[chug]" />

ChrisB

Ask and ye shall recieve

this is one I did - shows you the effect that r/s lengths will have on the piston (instantaneous velocity, acceleration, jerk, etc.). You can just change the first value in each column and it will change the rest.
http://www.slowcar.net/shared/pistonmotion.xls

also found this one floating around awhile ago, and snapped it up.
http://www.slowcar.net/shared/o2_volts.xls

http://www.slowcar.net/shared/jlups/pw_fuel_rate.zip
http://www.slowcar.net/shared/jlups/...fr_wb_calc.zip

These are a couple John Lamb worked up specifically for aid with LT1 Edit tuning.


you can browse most of my misc files at

http://shared.slowcar.net

Crazyquik

Thank you sir <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" /> I was looking for these earlier, but I didn't know about the shared director, I was just looking at slowcar.net

Toxic Texan

Hey ChrisB check out this thread and tell me where your hidden stuff is!!! <img src="gr_grin.gif" border="0"> https://ls1tech.com/ubb/cgi-bin/ulti...&f=16&t=000161

red ws6 99

We use mono methyle hydrazine (mmh) its real fun to work with along with n204. I test rocket engines for nasa, we spend more money on fuels and safety then anything else. Its only a little dangerous, the sign on the tanks have the following warnings:

Dangerous to skin, eyes, heart, kidney, blood,lungs, etc,etc, and cancer causing.

Also mmh will even react with air, it wont flash, but the temeperature in the area of a small leak (couple ounces) will bring the temperature up to 20-30 deg F. Its real good cleaner though, your engine if it survives will be the cleaned you have ever seen.

Now the oxidizer (n204) will destroy any carbon steel quickly, plastics (instantly).

Great stuff to work with, we spend a long time in little blue suits.

Gary

01Z0H6

iTrader: (63)

There is an Exxon station in Van Alstyne Tx that sells 103 octane @ the pump!! <img src="gr_grin.gif" border="0"> It is currently around $3.75 per gallon!! <img src="graemlins/burnout.gif" border="0" alt="[Burnout]" /> Often times i wil do 1/2&1/2!! 93 oct along with the 103!!!
Oh yeah!!!!!

Stab & Steer SS

Is there any chance of this stuff eating the baffles in the gas tank or any plastic / rubber in the fuel system?

Chris

02 SOM WS6

Here is another place to look at xylene & toluene as octane boosters:

Octane boosters

They will eat up some plastics so be careful.

And here is an MSDS (Material Safety Data Sheet) for Para-Xylene, other aromatics will be similar.

MSDS

There are different types of xylene: Para-xylene, ortho-xylene, & meta-xylene. Octane numbers will differ slightly. I think para- is the highest but don't hold me to that one.

Hope some of this helps,
Les

Gearhead

iTrader: (3)

Quote - Is there any chance of this stuff eating the baffles in the gas tank or any plastic / rubber in the fuel system?

I was wondering the same thing. It looks like the TR guys are using a lubricant (WD40, Marvel Mystery Oil, etc...) in addition to the alcohol. Further, they are injecting the mixture from an independent tank/resevoir. We, on the other hand, are putting it in the tank and running it through our entire fuel system, including the injectors. Would this have any detrimental effect on our fuel system?