genolan

When you tune a car with Meth would the extra Horsepower gain come from a more aggressive tune knowing you have the safety factor of Meth or is the Meth Fuel itself giving the extra HP. What parameters are made more aggressive if the tune adds the HP

schpenxel

Timing is added. Fuel can be leaned out as meth will replace some of it (or can just let it be rich, tons of ways to do it)

C6 Curtis

If you have a good kit that's reliable you can lean it out to get the maximum power from the kit. I hear stock manifolds suck *** with distribution but if you do direct port it's the way to go. Not to mention some good kits have fail safe that pulls timing. You can buy something like this and tie into your kit. I'm sure the vendors on here sell it.

mourat

My setup I have it lean out fuel & add timing ONLY when meth pressurizes. If Meth pressure is gone the tune reverts back to NO METH fueling and timing Had that for years works like a charm.

C6 Curtis

What kit did you go with?

-Curtis

schpenxel

Curious how you're changing fueling? Stock ECM or no?

Or were you the one that used the DSX box to change timing/fueling when the meth light goes green?

I have done something similar on mine, though it ramps in instead of being all at once

neverstop

also would like to hear more.


there is data/threads on here about fuel distribution and Vengeance as well as ECS I believe, who build some of the fastest cars in the country, both recommended when I spoke to them to stick with only dual M10 tips at the max because they were seeing huge EGT differences between cylinders, but they're also talking about race cars that see WOT for extended times

Unreal

He uses the DSX flex time box so it runs the flex fuel maps when meth is on. Awesome setup that just about everyone should be doing, but sadly most people don't even know it exist.

schpenxel

Gotcha. Yeah that's the way to do it for sure. It works great on mine.

neverstop

that is fascinating, i did not even know that is possible

Dude_man

Should have made kits like I said

mourat

Yup and but running it for years!

The other day I went to the dyno I forgot to turn meth on and ran got huge numbers and was impressed until I saw meth was on LOL.

Essentially when Dave first came out with his FLEX module I thought why not use his big brain device with meth? So of course I did not care much for meth back then until I saw what Dave created and ordered up a kit. Installed it all, wired up Dave's flex module to the Alky Control like this:

Meth = ON means nothing
Meth = ON + Pressure established (green light on Alky control is on) = Flex module commands 100% ethanol to the PCM. Then the PCM adds timing and backs out fuel.

The minute METH = No pressure (pump failure etc..) then the Flex module shows (0% ethanol) and the PCM goes to default timing and default fuel.

Keep in mind that the module works so fast that it's back to stock timing and fuel before the motor sees the last drop of methanol. In the event meth is working just not well enough to establish proper pressure, the flex kit will still default to stock fueling to prevent undesirable results

The Meth = ON + Pressure established only adds timing and removes fuel where you want to, so if you press the "test" button on the alky kit that does nothing to normal driving. Only after about 3k RPM and 3 psi boost where we run into real power.

I have done a write up on this board many years ago if you search on how to get this done. Dave should be praised for creating this thing and everyone should be using it if they want their engines safe while not leaving power behind.


There is other ways of doing this but it's more complicating and harder with more boost that I've done on a few older LS1 cars but same idea. The flex module is 10x easier and proper. I am sure Dave can still make some I don't know if he still does.

schpenxel

Still may. Got two people trying them out now to see how they do

You gotta give me a price on the wiring harnesses you sent me!

Dude_man

Text me quantities, and ill see what I can do

BigV

Can anyone recommend a performance shop that have experience with installation and tuning of alky control? I am most interested using 100% Meth configuration. I have A&A Si supercharger installed on a C6 Z06.

Looking for highly experienced shops located in the Midwest area.

EvanZR1

I'd be interested in a kit if someone made it. Quick question on the setup, if you pulled the fuse for the Alky pump, I'm assuming it would just run on the normal tables? This would be really nice for going on long trips where you don't want to take meth along.

schpenxel

The amount of timing added/fuel pulled would be totally dependent on methanol system pressure. You can set it up so at 0psi it's at say 10* of timing @ WOT, and when it's at 100psi methanol line pressure it goes to 15* of timing or whatever you want it to be. 50psi it would be 12.5* (you can adjust it so this isn't totally linear but there are limits to how precise you can make it)

Same for fuel.. you can change either the stoich value for fuel to make it run rich @ 0psi and say 7% leaner @ 100psi or you can leave it rich all the time.. totally adjustable.

Obviously you have to have HP Tuners and know what you're doing tune wise to make it work.

neverstop

whoever sells a good kit for this will make a bundle, lot of cars starting to run the various methanol kits out there and IAT sensors just don't react fast enough for worst case and tuning for meth is still not as precise as it could be from what i can tell,. works fine but more control would be valuable

Dude_man

That's what I've been telling him. He's like the rain man of meth and Hptuners.

DSteck

I can do a large run if people want them.