Hmmm....this makes me think....with EFILive's 2-step/valet capability, I wonder if there is a way to enable the secondary rev limiter if the pump quits working....

The only potential problem I see is that the rev limiter cuts fuel, not spark, so if the alky pump failed at 6000 RPM and the PCM cut the injectors too....what would happen?

 

So... it seems that meth is a good substitute for fuel if you can do it safely in case the pump fails or meth goes empty.

I wonder what options will safe guard using method....

 

i was thinking...on my Dynojet Wideband controller, make it so at a particular rpm/TPS if you go lean it would cause a resistor go inline with your IAT sensor telling the vcm your IAT is like -40 or +284, whatever makes you warm and fuzzy, and have it add back to the pe table (PE Fuel Adder vs IAT) due to the temp being reached. I would also use the IAT Spark Advance table the same way, pulling all of my timing as well.

So for example, you are WOT (whatever tps you set for a trigger), +3500RPM(or whatever), and you go lean (lean=whatever you set)...then the circuit would close and the IAT would go to 284 and the pe fuel adder vs IAT table would add your designated add of fuel, and your Spark Advance table would pull whatever timing you told it to.

same theory as using the same tune for no n2o and n2o. turn on n20 and the iat gets raised and your timing goes down to whatever you specified.

 

Nothing, it would be like turning the key off, the motor would stop running. Less fuel = lean burn, but no fuel, as in rev cut off = no burn.

 

Might be worth looking into then

Those of you running meth....you running 50/50 mix or 100% meth?

 

Makes sense. Nothing for the spark to ignite. Detonation is when the fuel gets too hot and ignites prior to the spark due to compression, right? So, no meth-no fuel, = no boom boom GI.

 

Actually, that is preignition, which isn't that common. Detonation is when combustion pressure are so high from the a/f being ignited to soon (or too low octane fuel), it explodes instead of burning cause extreme pressure (knock) and breaks ring lands. This is were higher octane fuel comes in, it burns slower so you don't get detonation with more spark advance.

 

So the meth is more of an octane booster and not actually intended to cool the cylinder/air charge. But, that is a bonus biproduct of the octane increase?

 

Yep, double bonus More octane, lower IAT

I only run it for the increase in octane when I'm in boost,(when I need it) I already have really low IAT's with the intercooler.