Alcohol vs. Nitrous vs. Propane vs. Water

[RussianVR-4]

derek's kit has been in use for YEARS. with great results. my friend has had it on his 650rwhp supra for at least 2 yrs now with absolutely no problems.
he offers a solid state relay for the system, when used in conjunction with the AEM, it has a progressive control as you described. ramps up the pressure so it doesn't bog the motor with too much meth.
when running 100% meth i use Uplon lube. most supra guys use their windshiedl washer tank that's ~1.5 gals and that lasts for a LOOOOOOOOONG time. i'm talking ~2 full tanks of gas.
for 350 bucks that's one HELL of a system

[DJ_Duck]

Originally Posted by Trevor

I run two 7 GPH nozzles with the gasoline leaned out to compensate and my low alcohol light comes on after 9-11 full passes down the strip. That's with a 1/2 gallon reservoir and there's still a couple inches of alchy in the bottom when the light comes on.

How do you have your system tuned?? 14 gph is ~ 880 cc/min! Thats a lot of alcohol!!!

[DJ_Duck]

Originally Posted by Jim Floyd

Does the water/alchy mix have the same cleaning effect on carbon that straight water does ?

More or less, best way is to physically clean all that junk out (or use seafoam or one of those cleaners) and then reroute the pcv, disable the egr, unplug the charcoal recirc, and then you don't really need to worry about any more build up

Heres something posted by IPO on another board about the benefits of propane injection:

Originally Posted by imp pwr online

Very High Octane Rating of 110+
Allows You To Run Higher Boost Levels Without Detonation
Very Cost effective. One $2.50 Propane Tank fill up lasts many gas tank fill ups
It's like running Race gas on the street....Except it only costs $3 month to use!

For Gasoline Forced Induction Vehicles:
Higher Octane allows for higher boost pressure
without detonation which is the leading cause
of engine failure in F/I setups

The Gaseous/Vapor state of Propane forces a
better distribution of Air/Fuel charge greatly
reducing "Hot Spots" in the combustion chamber
lowering the chance for detonation

[Type R]

Can we add race gas to these comparisons. It would provide alot of information that I might want to know too.

[Jim Floyd]

Originally Posted by Type R

Can we add race gas to these comparisons. It would provide alot of information that I might want to know too.

You bet - what can you tell us about race gas ?

[DJ_Duck]

Originally Posted by Type R

Can we add race gas to these comparisons. It would provide alot of information that I might want to know too.

Well, race gas is just a higher octane. High octane means it doesn't ignite as easily thus it's a knock deterrent. Higher octane, when you don't change anything else, lowers horsepower because it requires more energy to ignite. So you want as low of an octane as you can get away with.

[Trevor]

Originally Posted by DJ_Duck

How do you have your system tuned?? 14 gph is ~ 880 cc/min! Thats a lot of alcohol!!!

Well...they're rated at 14 GPH but who knows at what pressure. My system runs at over 100 psi. Yes it's tuned right. You do realize that some pure drag motors run pure ethanol right...as in abolutely no gasoline? You can make some serious horsies if you put enough compression/boost/timing into an alcohol motor. The only negative is the amount of alchy you go thru to make that power. The fuel delivery quantity must roughly be DOUBLED to make the switch to 100% alcohol.

[DJ_Duck]

Originally Posted by Trevor

Well...they're rated at 14 GPH but who knows at what pressure. My system runs at over 100 psi. Yes it's tuned right. You do realize that some pure drag motors run pure ethanol right...as in abolutely no gasoline? You can make some serious horsies if you put enough compression/boost/timing into an alcohol motor. The only negative is the amount of alchy you go thru to make that power. The fuel delivery quantity must roughly be DOUBLED to make the switch to 100% alcohol.

Ack, don't get me wrong, not meaning to bash you or anything!
Just most of the people who run an alcohol injection system go through a gallon tank in a couple months, not a half gallon in 2 minutes! Have you tried dynoing with alchy injection and lower IDC, and then with no alchy and just gas? Be interesting to see what kind of gain there is to running that much alchy when boost isn't a factor...

[Trevor]

A gallon tank in a couple months? That's not set up optimally.

If you're running 91-94 octane the more alcohol you can shove in a motor at WOT without it bogging the better. You will make more power if you bring back the fuel and throw more alcohol at it. There are no negatives to adding more alcohol besides the money it costs and even then its still much cheaper than race gas.

Well there is one negative on our cars...you lean out the gasoline too much with a piggyback A/F controller and you'll get excessive timing advance. Of course alcohol likes timing advance but that particular balancing act is one to keep in mind.

[pachieh]

I don't know why you all are so worried about a "flaming bomb of hell" with a propane tank sitting in your car. Police cars have been known to have propane in their vehicles. RVs have propane tanks on the OUTSIDE also. How many RVs have you seen that have been blown up because of the propane? I would imagine not that many. Gasoline is MUCH more flammable and explosive than propane is. Nitrous is more unpredictable than propane is.

Propane and alky/water injection are probably the safest choices. Propane is VERY cheap and you can get it at any gas station you can find. I know I'll be putting propane in. Just check for leaks in the system before you light a cigarette near a leaky propane tank....