help me out here.... now i read the other threads like this and it really turned into different things...my question is here:

-i heard the use of propane can lead to gaskets drying up and eventually leading to leaks?? is this true...?? i want to use it to raise octane so i can crank up the boost... i heard that propane is better then alcohol....help me clear the myths and rumors!!!
thanks!!

 

Last I heard they use propane on desiels to add power not anti detination engines

 

do a search on propane injection on the forum, some members have done it...and it actually works....take a look....im just tryin to shed light if there is a actual fact that propane leads to gasket failure

 

bump because i said so

 

Methanol is rated at 130-160 octane (i see different ratings, but the average seems to be about 123-130).... you can do methanol injection which is what I will be using. I got a pretty badass setup that i'll be using and it runs about $575 for the whole kit. I plan to spray at 12+ psi. This will allow me to boost 22psi on pump without any detonation problems.

Methanol runs anywhere from $3.50-$4.00 per gallon, and you can premix it with water if you just want to add a few psi. If you run straight methanol you'll need to use a lot of it compared to denatured alcohol.

Denatured Alcohol has an average rating of 130-140 octane. Someone can correct me if I am wrong, but I am not sure on the exacts, but those should be in the ballpark.

You can also add them to your fuel without an injection setup.

Methanol as an additive limited to 10 percent will give an Octane increase of about 5 points. For example 98 Octane can be increased to 103, or looking at it another way, cheap fuel of say 91 Octane can, by the use of 10 percent Methanol, or approximately three quarters of a pint per gallon, will produce fuel of 96 Octane.

Denatured alcohol will cost you an average of $8 a gallon, but you don't have to use as much of it as methanol. I figure methanol is the cheaper way to go.

The use of fuels with alcohols such as methanol can confuse the engine management system as they generate more hydrogen which can fool the oxygen sensor. This is what if you do an injection setup on any straight of highly mixed fluid.. you need to tune for it. If you are using it as a fail-safe device for say a boost spike or something... then it's really not needed. If you plan on doing it to run a constant boost, then tune for it.

My setup will be 0-12psi WITHOUT methanol, using a boost controller restricting my boost below 12psi.

Boost setting 2 will allow me to do > 12psi up to 22psi with spray.

As far as PROPANE is concerned, I believe it's octane rating is ~104 or in that ballpark which is far less than alcohol or methanol. But it is cleaner and a lot more effective in certain areas.

Referenced from http://www.mipga.org/Vehicle.htm is the following:

Propane's 104 pump octane rating and low carbon and oil contamination characteristics can result in documented engine life of 529 to three times that of gasoline. This is one of the prime reasons for propane's popularity in delivery fleets, taxis, buses, and industrial engines.

Propane emissions have 93% lower carbon monoxide, 73% lower hydrocarbons, and 57% lower nitrogen oxides than the federal Clean Air Act standards.

Propane provides more vehicle operating range per gallon than any other alternative fuel. It costs approximately 30% less than conventional gasoline and yields only slightly lower mileage.

Propane is a premium unleaded fuel with a high pump octane rating of 104, without additives. The higher the octane the higher the fuel's antiknock properties, and the better the engine performance.

As per http://www.rvlifemag.com/file295/rvtip295.html

Although propane has lower BTU energy than gasoline, it has an octane rating of 104 without needing additives like gasoline. The higher the octane rating of a fuel, the more slowly the fuel burns as the piston moves down the cylinder - therefore there is less chance of pre-ignition and damaging detonation of the fuel slamming into the top of the piston (knock). The octane rating of Esso regular gasoline is 87, Esso Supreme is 92. The rating of US gasoline is often as low as 82.

You can find information on wether gaskets or o-rings will be compatible or resistive to Propane (or any other chemical) here:

http://www.efunda.com/designstandard...C=Propanol#mat

As per VP Racing:

M-1 Racing Methanol has a 99.95% minimum purity - the highest purity available in the U.S. With M-1, engines run cooler and are less subject to corrosion.

As per http://sneakypetespullers.com/technical%20Articles.htm

Methanol burns much slower than the highest octane gasoline. (It has about 135 octane rating.) Therefore, the ignition timing must be advanced more than for gas when burning methanol. If the timing isn't advanced enough, some of the methanol will go unburned and little will be gained

**

Hope that helps you =)
-Darren-

 

intresting info... i like it... i want to know about just straight methanol.. can i use that..help me out here... good help so far

 

you have to use a lot of methanol if you're going to use it pure. You'll need to compensate your tune for it.. and few tuners know how to do this well. Steve Kan has experience with it, and Trevor of nopistons.com (he's in AZ) - but there are others. Depends on how heavy your foot it, but I recommend using a large enough tank so you don't have to worry (at least a 1 gallon tank).

Water has excellent cooling properties but doesn't combust.. it's good for cooling the intake charge but that's about it. Methanol will burn and cool down the intake charge, but it won't cool it down as well as water... the upside is.. it creates a cooler burn.

 

nice, i sent u a pm again about the gt42r

 

3000 gt vr4s/stealths, supras and grand nationals have use propane for years. i knew a supra that used it on his car with a large single and a bone stock fuel system. it ran an 11.00 with over 20psi. that of course would have thrown every rod in the motor without it. but i hear its tuff to tune it or get it perfect.

 

hmmm, thinkin of going alc injection dhahlen and i had a good chat online today bout it.. and he convinced me