I want to know from all you guys running bigger turbos...GT30r, GT35r, FP3065, True 20g, 50 trim AND TUNERS

How do you tune your cars with Methanol it?

What psi do you start adding Methanol injection?

What rate assuming you're using a progressize MAP controller do you begin and end at?

Thanks..your help would be GREAT

Methanol tuning is a different animal then high octane tuning. On a GT series turbo you'll want to start the meth kicking early (this depends on the kit's switching mechanisms, location to the pump, etc. ), maybe 6-8psi of boost because of the rapid boost onset of these turbos. The affect of meth is to substantially lean out the fuel, so you'll want to put AFRs back to around where you would run it on say 93 octane pump. The timing is about the same. This of course is a general rule of thumb, all cars differ, that's why we sell tuning not rather than base maps.

If you're local we have tons of experience tuning meth / alki injection, our tuning rate is $199/hour.

Cheers,

Gary
Gruppe-S

I live in Jamaica 'MON' ... I got my JDM 9 bumper from you guys though!! Thanks for the input..Respec

No problem man, shoot me an e-mail if you need some help, I'll get Mike (our tuner) to help you out when he's not at the track racing (tuning Grand Am GT car right now).

Just wanted to clarify the timing you'd run about the same as 100 octane gas. It's the AFR's you want to keep a bit richer than 100. Also meth onset totally depends on the turbo, just keep it early because we see a lot of variation with delivery times depending on the kits!

Good luck!

Gary
Gruppe-S

Great thanks Gary...I'll shoot you an email if I have questions.

Respec J

When meth injection is applied, the AFR will suddenly be richer, not leaner. The object is to remove enough gasoline to lean the AFR until it's back into familiar territory.

Just a bit of clarification.

I'm kinda confused, alky makes AFR's leaner or richer
Thanks.

Injecting alcohol on top of a tuned gasoline map makes the AFR richer, not leaner. Tuning for alcohol injection involves leaning the fuel map to bring the AFR back into familiar territory.

Funny, I feel like I'm repeating myself . . .

Sorry I keep thinking something and typing something else. I'ts been one of those days...

1. Meth will richen your AFR
2. You should bring you AFR's no leaner that ~93 octane AFR.
3. This would differentiate from race gas where you are leaning out your AFR's substantially over pump gas.

Cheers,

Gary
Gruppe-S

ive always thought that if you use meth injection, you are fairly safe to lean out your AFRs into the 12s since you are using the cooler burn to help your cylinders from getting dangerously hott at leaner a/f mixtures

I have mine set up to come on at 20 psi, and ramp up to "full blast" by 26 psi. But I have it wired in to my AEM EMS, so that the EMS only leans out the fuel and bumps up the timing after it recieves a signal from the pump pressure switch telling it that the methonol is spraying.

If you don't have the AEM EMS I agree with Grupp-s 100% You want to be positive that you have alcohol flow befor the ECU changes timing or fuel, so without something running off the pump pressure switch you are better off spraying alcohol when you don't need it rather than needing it and not spraying it.... sort of like concealed carry

On the A/F ratio side of things, I am running mid to low 11:1 A/F ratios and would be comfortable running leaner but I am on the stock long block and see no reason to push the limits. If you do not have some kind of safety system to adjust your A/F ratios, boost pressure, and timing if the alcohol system fails then the richer you run the A/F ratio without fouling the plugs, the safer you are in case of an alcohol injection system failure..... still not safe, but it may help a bit.

Keith

Thanks 'Fourdoor'

Fourdoor - Do you think I could wire my alky system into my Autronic EMS? How did you do it? Thanks again.

That's definitely teh smart way to do things Where do you have your pump pressure switch located?

For those of us that wouldn't touch an AEM EMS with a 10' pole, Xede has a lean-run protect. Should the alcohol fail, or, should any other fuel system component fail and result in a lean mixture, you're protected.