IAT sensor is combined with pressure sensor before throttle body assembly on the Y pipe.

 

I've seen some independent tests that at 35ºC ambient temp, the AIT with the engine at operational temperatures stays around 55ºC and with W/M drops to 15ºC.

If you want to keep it safe then the 50/50 mix is the way to go: 50% destilled water is the best solution to drop AIT's; 50% pure methanol is to prevent the engine run too lean due the water. Mix it by weight and not by volume. I normally mix 2kg meth (~2,5 liter) with 2kg of water (~2 liter). This mixture also helps to raise a bit the fuel octane.

100% meth besides being extremely inflammable and dangerous, it will wear precocious the engine in the long run. The meth don't substitute race fuel, because althought it can achive similar levels, it doesn't worth the risk.

 

It would be great if anyone can provide any real life evidence of straight methanol causing any kind of damage to an engine.
I run straight methanol for almost two years now, I have run over 500litre and no problems at all.
Yes methanol is dangerous and needs to be handled carefully but I don't think it causes damages to the engine. If straight methanol does then 50/50 will also do.
I have just finished installation of braided Teflon hose and stainless steel fittings, this will minimise risk of leak compared to the stupid nylon hose supplied with all kits on the Market.

Have in mind that 50/50 is also very very flammable,

 

Someone please correct me if I'm wrong but I think the issue is that pure methanol is very flammable but not combustible. If you end up with unburnt methanol in the combustion chamber, it can have the similar effect of a hydrolock. I was always told that's why you had to use a mixture with water.

 

some more explanetion on this Tom please

 

Like I said, I'm no expert at all. This was all explained to me by someone else a long time ago, and since we don't really use meth injection on our kits, I don't know for sure.

But I know that water vapor is what provides the cooling effect during water/meth injection. I'm not sure if meth alone could do it.

 

Methanol is flammable and combustible (means same thing really). If you really want to make great power run a straight methanol set-up. Water has about twice the capacity to cool over methanol. I don't think spraying methanol will have any negative long term impact unless it starts leaking or some other failure different than its intended purpose. Proper maintenence is the key.

 

Dave...does it vaporize like water? I think that's what he meant (he being my friend that sort of educated me on this stuff a while back).

 

Hi Tom, It vaporizes much easier than water but does not have the same cooling capacity of water. Meaning water can absorb more energy before its temperature rises or conversly it takes more energy to raise the temperature of water (say 1 degree) than it does methanol. I should add when you mix two different solutions together like methanol and water and generate a mixture, you get what's called an azeoptrope. The mixture will boil somewhere in between water and methanol. The nice thing about a 50:50 mix is that I don't believe it is flammable so it will minimize the fire risk. As for which is better for power, I dunno. I think it all depends.

 

it's your race car or everyday car?

just spray water on the core of the cooler and accept the resoult.
make your life easier....

 

50%meth.+ 50%water +100octane fuel is the best way for 997tt

 

Do you mean performance wise? Any results of VTG based car ?

 

yes mostly for vtg car's
kercar done 100-200 in 4,7 sec with vtg

 

Yes but I think those were the 68mm VTGs.

 

K24F! May I suggest try to dump some ice cube into intake air duct above IC and log your car to see what happen? However this may sound silly or ridiculous. But it is inexpensive and no harm to test it.