dville_gt

iTrader: (5)

I am already using the IAT spark advance correction to pull timing in the event the meth doesn't spray (I just make sure I adjust the table as the ambient increases so it doesn't falsely pull out timing), but I was wondering if I could increase the PE ratio using the PE adder vs. IAT table to increase the PE ratio in the event the meth fails (and presumably the IAT's go past their normal threshold).

Anyone both pulling timing and increasing fueling based on IAT's?

jpracing01

depends on how much meth you are injecting..

35thsscamaro02

I would like to know this also. Im running two 10gph nozzles 75/25 meth to water mix. If my meth fails my a/f is fucked. Motor gone. Makes 668rwhp

ddnspider

iTrader: (26)

That is just a plain terrible idea. You use meth to drop iats and maybe add a couple more degrees of timing in some cases.....using it as a direct crutch for a lack of octane is playing with fire.

35thsscamaro02

I know this. I guess if I run a progressive meth controller with a smaller nozzlw it would prob help.

MUSTANGBRKR02

iTrader: (91)

It is no different than a injector failing or any other part of your build.

Plenty of people use meth the way it was meant to be used and have no problems. I send my pump out once a year to ensure that it is operating at 100%. that is what is recommended by the manufacturer.

02402RAMAIR

iTrader: (8)

We had a Meth pump not activate on a test run a couple weeks ago. IAT's hit 160 and I had the tune pull 10 degrees and add fuel at that temp. Car went to 9.0 and 0 timing and saved the motor. 1000rw car at 24 or so psi. The IAT timing and PE fuel tables are a fail safe for your Meth tune. If your tuner does not use them find a new tuner!

Packy

iTrader: (11)

What he said cannot be stressed enough.

eb02z06

iTrader: (18)

Yep-good common sense info here.

Nitroused383

iTrader: (10)

You can view my comments about a similar topic you recently inquired about https://ls1tech.com/forums/forced-in...fun-stuff.html

Slowhawk

iTrader: (12)

Problem with low boosted cars the inlet temp doesn't get hot enough to pull timing when meth doesn't spray. Expecially on cold days.

Saying that, we still run many cars with it and some tuned heavilly on it. We have had no problems with the kits we use- alky control but have seen many failures by a few other kits, those I will not tune for.

So, tuning IAT can help IF the intake heat gets hot enough.

35thsscamaro02

That was the exact problem we were having with my car. Not running much boost only 12lb at 6600 air temps are so low already. I also dont have a progressive controller so we had to pull a lot of fuel. I'm building a forged ls2 and maxing the d1 out. So I'm pretty comfortable driving with a meth relied tune for a few months. Im pretty much use to watching my wideband from my bottle setup.

Julio

Always test test test and watch everything like a hawk. From fuel pump, fuel pressure regulator, fuel level in tank, meth pump, its tank level, etc.

There is no idiot proof racecar. The best is to keep tabs on everything that is part of teh fuel system. The LS computer allows for this type of safeguard. But doesnt allow for someone racing on an empty gas tank.

Cost of C16 is 95 for a 5 gallon pail. Pump rebuild is 80. Do the math. The math goes against you when you wait "years...." to do what should have been on your spring cleaning worksheet.

slow67

iTrader: (2)

Some meth systems use a flow sensor. If it fails, you can have a 3 port solenoid switch and blow open the wastegate or BOV with CO2 (or similar) to dump boost.