what is the best location to install water/meth nozzle? I'm asking because of I heard that some people having problems cracking their pistons because not enough meth getting into the cyl#1 and #4, but in the other hand I heard of people running long time without any single problem.Is the problem more related to the nozzle size or the nozzle location? Im planning to install the AEM kit.

 

The best way is to do a Direct port setup by tapping each runner. Its a bit more expensive but the best power and motor saver. If you want look at cooling mist and get the cooling mist CM5 super atomizing Nozzles with a 4 way splitter and a one way valve and tap each intake runner and you would be good. That was my setup just unhooked my meth. and I have the AEM Kit as well just get a 5 gallon tank lol.

 

I have run two jets in my uicp with my aquamist kit for years with no issues.

Whatever you do get a kit which has great atomization and failsafes.

The failures I have seen/heard about have resulted due to a lack of flow due to a clogged nozzle, pump failure, etc. or a tune on the brink of destruction.

I have heard running a direct port will help with inconsistent afrs between cylinders. I am skeptical though and have never seen a test showing individual cylinder afr on an Evo. That would be interesting. Here is why I have my doubts that direct porting would be the fix.

It seems to me that each runner receives different airflow amount due to the oem intake manifold runners causing inconsistent air distribution.

I have always wondered if the cylinders have inconsistent afr due to this. It would seem that the injector as told to fire based off of what they are told due to the maf readings.

The maf doesn't know how much air is making it to each cylinder individually. So I would figure that neither do the injectors. It would cause inconsistent afr from cylinder to cylinder from the factory. This is why the majority of motors whether on pump or other seem to blow a piston do it on cylinders 1 or 4.

 

Thanks ,Im going to go with direct port,250PSI pump and AEM fail safe.Any nozzle size recommendations I'm not looking for big power just little more HP and octane since there is no more 93oct here just 91oct.The car have just bolt ons(injen intake,3'' full exhaust,walbro,intercooler,stock turbo).

 

Generally smaller nozzles are used.

Take how much fuel you plan to flow at 100% idc. Multiple that by 1.1 to add extra for system loses. Multiple the cc amount by 4 (four injectors)
Multiplie this number by 10-15% for water. 15-20% for 50/50. 20-25% for 100% methanol.

That will tell you desired flow for your given setup at its max. The system should be able to add as needed up to that max required operating range.

You will want to divide the desired cc by 4 to account for the four nozzles you plan to use. Over sizing a little is better than under.

Ex. 4 - 780cc injectors.

4 x 780cc : 3120

3120 x 1.1 : 3432

3432 x .25 : 858 max desired cc of 100% methanol at full IDC.

Split that max required flow for the given injectors by number of nozzles desired.

858/4 : 214.5

So each nozzle would have to be able to flow at least 215. Remember that bigger is not always better. The smaller nozzles have better atomization generally. So try to find ones that will flow that amount or just over that but not excessively.

 

Good info , is time to do some math.

 

after doing more research I'm going to buy the Aquamist HFS-3.