1sicsol

Anyone running methonal injection? Whats the positives and negatives of running this? How much boost can you run? And is it reliable?

I want to run up to 20psi on methonal injection with 94 octane. I want 500whp with out using race gas. With of course all supporting mods.

Input? knowlege? experence?

Thanks,
--Mike.

RageRace

Call DavinciMotorworks.com
They sell a fully adj/regulated Meoh/alky/h2o kit for pretty cheap

IAN

iTrader: (3)

Wow dude. Sounds like you will have some serious mods by next summer. Hopefully my turbo woe's will be fixed and we can cruise to the ottawa meet or meet up again at tauton!

Dam. Must resists more mods! Going back to dual exhaust probable to.

1sicsol

Yea hopefully. I've never been to the ottawa meet but I'm sure we'll go when it happens.

Hopefully I can figure somting out in the mean time about using methanol or race gas.

GOTBANNED?

hopefully i will be out with a new rex..and out for more cruises

MFilippello

iTrader: (2)

This is what I am shooting for. 500rwhp @20psi on pump gas. I plan on using a 50/50 mix of meth and water. Should be good for 20psi easy. I am running 15 on pump now. once tuned correctly and working 100% you can actually run an afr of 12.5 to1. This will net even more power. Any fuel over 12.5 to 1 is only aiding in cooling the cumbustion chamber. with meth/water this does the cooling so we can lean it out for max power. Problem is if you have a failure with the water, you are in trouble. This is why you need safety backups.

as for systems, alkycontrol has a system that is variable based on boost. It uses a voltage controller to adjust voltage to the pump for different delivery rates. For the ultimate in programibility, you need a system that has a prorammable injetor driver which can be setup in a 3d mode. aquamist has some but they are pricy. Companies like split secound make injector drivers that will work. The trick is to find the injector capable of handling water. Let me know what Divinci has.

MIke

1sicsol

Here is a home made kit the GN guys are using.

http://members.***.net/stevemonroe/AlcoholInjMod.html

at the bottom of the page there is links to some more info for this stuff. Looks like these guys are using a nos jet to spray a mix of alcohol and water and its working well.

This page http://www.alkycontrol.com has a progressive controler that uses a few sensors to ajust the spray according to your boost levels.

the_glass_man

iTrader: (2)

I wouldn't tune that lean on a rotary, it's just asking for trouble. Especially with the amount of boost you want to run on pump gas.

ZeroBanger

For your application its better not to run 100 pct methanol. 50/50 will be a better mix. I would recommend a dual stage style system, the advantage is having 2 different size nozzles at differet locations in your intake track. Combined with a 100 psi pump and different set points your car will see some nice gains and have detonation protection.

1sicsol

"the advantage is having 2 different size nozzles at differet locations in your intake track"

Can you explain this more in detail? Whats the advantage?

Thanks,
--Mike.

rob20rx7

iTrader: (1)

check out this thread. this is with an alcohol injection setup.

https://www.rx7club.com/time-slips-dyno-121/proof-paper-373372/

rob20rx7

iTrader: (1)

..

1sicsol

Rob, how come you dont run a 50/50 mix?

rob20rx7

iTrader: (1)

i run straight denatured alcohol and a pump lubricant. when u say 50/50 do u mean meth and water? if so i figure the meth has high octane but is harsh on the pump so u have to make it acceptable by mixing with water. alcohol already has water and its working fine and i dont have to mix.

ronbros3

the torque and HP cross over at 6250 rpm? most all the sheets seen cross oer at 5250 RPM whats that about RON in daytona

ZeroBanger

Alcohol burns, water cools. When you run 100 pct alcohol its not as effective as running 100 pct water or 50/50. Since it burns you create heat and are more likely to detonate than if you run 100 pct water.

Also, methanol has 118 octain and is far superior to denatured alcohol.

RICE RACING

If you want mega power, highest boost, best cooling then nothing beats pure water

Look at the latent heat values far superior to methanol/alcohol you need a race derived ignition system but once you have this and with a suitable water to fuel ratio the sky is the limit, literaly !

I sell proven water injection systems, if you need em PM me

bill Shurvinton

Well how about this for a thought. Just flipping through my copy of heywood and it shows the delta T (in F) between a stoich mix of air and petrol and a stoich mix of air and methanol. The methanol cools the inlet charge by 300F by the time it is fully vapourised in the compression stroke. Intriguingly this is enough to be counterproductive, as it will not have totally vapourised when ignition occurs, so you will lose some power from the combustion.

Rice favours pure water. I prefer a mix of at least 2 if not 3 miscibles for the injection.

Jim Swantko

My Meth system will be going in soon. I went with a system from www.smcenterprises.com - it's controlled progressively from boost reference.

I will be running 100% meth with lube added.

rob20rx7

iTrader: (1)

thats the one i used jim and it works fine. im running at 23lb boost doing just under 500 RWHP on pump gas. No problem. Been told that on Pure water i can go a little higher, but really havnt seen any reason to mess with it for now. ill wait till that special Viper GTR shows up then i may have to make some changes. LOL

Jim Swantko

The pump that comes with the kit seems to be corroded by water - if you get the upgraded pump you can run a water mix - but the 118 octane as well as the cooling effect of the Meth should be plenty.

I know someone who runs 30 psi daily on 93 octane with no problems with this setup on 100% meth. It's all about listening to the knock sensors and watching timing.

Steve is a great guy BTW - I'm glad to give him my businesss.

surfpac

I heard some guys using windshield washer fluid. It has methanol (not sure what %) and some lubricants. Works pretty good and is cheap.