Guys, could you advise me, is it correct to install injector nozzles like this, the car is Evo 8.

 

You would be far better served if you moved the injectors as far upstream from the throttle body as possible and if you separated then as well.

Ideally have one near the exit of the intercooler and the second one about 6" or more downstream from the first. The idea is to give the fluid as much time as possible to vaporize and to keep the nozzles from spraying into each others pattern. When two nozzles are located that close to each other the spray patterns can really start to interfere with each other, hence the separation.

 

important info for a newbie on research

 

Is it important at which angle the nozzle spay the methanol/water ? It is easy to fit at 90" degree angle, but is it necessary to try and fit it at lets say 45 degree angle ?

 

I don't think that the direction that the nozzle is on the pipe itself is important because the nozzle with atomize the fluid into a mist that will be sucked into the engine. Some people have made adapters that are welded on to the pipe to angle the nozzle direction.