If I wanted to use methanol what jetting would I use?
What is the "octaine" rating of Methanol?
What would I have to do different from sparying awith gasoline, that I might not see coming?
I could get a fuel pump and tank no problem.
Extra safty stuff would be easy to install too, fuel pressuer safty and fuel purge.
I think the octaine was equal to about 118, if I rember right.
Guys that run alcohol carbs I here they jet about twice the size compaired to gas.
Would I do that with the nitrous fuel jets, 2X the size?
I want to run methnol because it is cheap compaired to race gas all the time.
I could up the comperssion and still run pump gas when sparying.
Stupid ricers will here nitrous and methanol and think its nitro methane.
It would help me have a secert system, with hiden purge and other stuff below.
Alcohol wouldn't make black smoke that easly, so they wouldn't be tiped off that there being spared at least the first or second time.
This would all be for the 150hp to 175hp 3 stage nitrous for the Z28.
And maybe use methanol for the 50hp or so shot I want to put on the V6 after the turbos go on.
I realy want propane and nitrous for the V6 for the Cooling + Cooling effect of sparying gas and gas. I'll have to wait and see on the propane and nitrous.
*** I don't want to run methanol in the fuel system ( no methanol in the carb only gasoline), just methanol to the nirtous system fuel jets ***

 

octane is not the concern jetting is. you will need jets much and a pump that is much bigger.

 

you might actually need a bigger fuel 'noid....


also, you would have to be sure that its methanol compatible...

 

Yeah about 2X.
For what your concerns are though I'd look at using propane instead of methanol. It'll still up your octane rating (propane is 112-115), and you just use nitrous solenoid instead of fuel. Lot of the Viper and Vette guys are running this kind of system. Also propane's way cheap. One of the little 5 pound bottles you can buy at walmart will last you through several bottles of nitrous. Whereas you'll have to have a fairly large fuel cell for the methanol, as well as a dedicated fuel system.

 

I figured it would burn about 2lb's ( a quart) of Methanol per 150 shot 1/4 mile run.
so, I have to move a quart of fuel under 14-15psi in about 10 seconds.
I would have to have a propane fuel system, it just wouldn't have a pump.
I don't rember if the standard fuel noids are alcohol compatable, I could have 2 of them put in side by side flowing the fuel.
I don't think pressuerized fuel tanks (propane or fuel + some other gas to pressureize it) are allowed at a lot tracks / some events.

 

It doesn't work real good. You need to run to much fuel volume and it makes the charge believe it or not to cold. You also need to run a top end lube as it is corrosive. NOS makes special Solenoids for this. I used to run it the other way which works great. Run the engine on alky and use gas for the nitrous. a regular 100 HP jetting worked out to 175. Using double amount of alky is a myth. You will use more but at full throttle closer to 1.5.
On the propane thing you will need a heated regulater as that is to cold also and freezes the nozzles up.

 

WHY? What are you gaining by running methanol? The N2O is already cooling the inlet tract and any detonation that you'll get will be the result of running lean or melting something, methanol's high octane number won't help at all.

It will also end up causing problems with fuel atomization and the stuff is very corrosive, you better make sure that everything it touches is stainless or flush the whole system before you put it away. You can add some of the commercial lubricants or some Marvel Mystery Oil to counter this some… BTW, don't get the stuff on your skin.

To correct some facts in this thread:
- Stoichometric for gas is 14.7:1, Methanol 6.4:1 by mass. You need to run MORE then 2x the amount of methanol to run the same rich/lean then you do gas. FWIW, most commercial N2O setups are jetted around 6:1, so real world you could get away with using the OEM jets, but you'd be at the ragged edge, I'd like a mixture closer to what the N2O manufacturer intended unless you're SURE that all your stuff is happy and perfect.
- You need roughly 2x the jet AREA to get 2x the volume through the jet. A .070" jet flows roughly 4x what a .035 jet.
- You'll need to adjust your jetted volume for the differences in specific gravity. Gas is about .64-.68, where methanol is in the .79 range (depends on what is added to it, methanol sold as a race fuel has assorted good stuff added "to make it burn cleaner"). Figure you'll need to adjust your volume flow 20-24% in the other direction to make up for the difference in specific gravity
- Propane typically has an octane of around 108.

I'm sure that there was something else but I can't remember it right now.