step one: get an EGT

step two: see if you have an EGT problem

step three: post here again with results.

 

As I understand it, the meth is really good at lowering the intake charge temp, the water is really good at reducing ping, the combo lowers EGT's.

+1 on the EGT gage.

 

EGT gauge is in the works, but I'm fairly certain I have an EGT problem since the manifold is warped.

I just want to drive this car and its starting to depress me.

 

Maybe if you reduce EGT's you'll end the loosening nuts problem? Is that where you're headed w/ this idea?

 

no, I want to make sure the motor stays together for a long time.

 

water reduces EGTs because it reduces burn temperatures. Water only in an injection system will not affect your AF ratio, it will only affect your EGTs. Water doesn't burn it only becomes a gas, when it becomes a gas it expands alot, and the change from liquid(mist) to gas takes alot of energy, so you get expansion without more fuel. Meth for the pipes, water for the engine. At 25% meth my pipes aren't cool, but at 50% they are cool to the touch.

 

While I'm not debating that injecting meth upstream of the TB will have a cooling effect on the pipes (and thus a nontrivial anti-detonant effect on the engine) the most significant benefit to WI in a FI application is due not to evaporative cooling, but rather due to the direct knock-suppressing qualities of water within the chamber during the combustion event. Methanol is not a significant contributor to this quality.

And yes, water alone will measurably decrease EGT for a given power level, more so assuming that it permits an advance in ignition timing.

 

I would agree with you, which is why I am at 25%. more meth means more tuning.