Howzhit my braddahs, sistas, aunties, uncles madda's and faddas? Dis stay braddah D from 808! Cheee!
OK. Theres already a few threads about this on HID planet and i stumbled upon a few on some google searches but nonetheless, sometimes they are hard to find and another thread is always helpful right!
Our 370z's have some pretty crappy headlight output as we all know. And you can just be a fool and throw in some higher kelvin bulb and think you are getting higher output. Just like the 350z or any headlight projector, theres always improvement. So hopefully this helps.
I didnt have a photo of the stock headlight output so hopefully someone can post it for reference.
1. Take off the headlight. Theres already threads about this so i wont do this. Such a PITA with the Amuse (i have rep) one piece bumper.
2. Open the headlight. THeres already a huge thread on this.
3. I must mention, there are a great deal of items you should always do anytime you open the headlight. I know some people just paint but dont you want performance? and the flicker effect (cyan, purple, blue) is just sick!
4. Heres what you should have. I realized later that you dont even have to take out the silver piece in the pic that the projector bolts on to. The silver piece is what move when adjusting. This is awesome because you don't have to readjust head light beam after! Take off the projector from the adjuster brcket. 3 bolts i think it was.
5. Take off the the front (lens side) and the back side (projector bowl w/bulb).
6. You see this little black piece above the cut off shield, this is whats contributing to poor cut off.
7. So along with removing this little black piece, we will be changing to STI-R clear lens and Osram CBI bulbs. Top quality stuff. Get it from retrofitsource.com.
8. this shield can be taken off. You remove the two clips pictured on the top and bottom with a flat head. It holds the round cylinder piece that also has a spring. The piece on the left is the bi-xenon solenoid. The motor pulls the shield down for the highbeams. Once you take it apart, you will see how easily its put together.
9. Heres the shield and black piece were removing. Its slightly over the cut off shield which is the problem.
10. Grinded down with cutting wheel you can also bend it down like some other members did but i thought it was easier to cut.
11. Now its not visible over the shield.
12. I didnt go into much depth about the clear lens swapping witht he stock fresnal lens because there is too much too learn. to sum it up, the stock Fresnel lens has lines in it that distort the light, the clear lens from The retrofit source (along with other OEM cars like s2000) projects the beam more crisp and sharp. You have to also use lens spacers (from The retrofit source to make life easy) to find the sweet spot for a razor sharp cutoff. This has to be done while the projector is on and holding the clear lens with spacers to find the perfect amount of spacers needed, then you bolt it down. The tiniest adjustments will change the cut off so hold it steady and bolt the lens holder down and double check output again.
13. As you do adjustments with the lens spacing, you can create this blue line which is commonly knows as flicker effect. This colerful light projects purple, cyan, blue, yellow right on the beam line. You will see this often in your rear view mirror of some cars like TSX, S2000, Acuras, BMW i3, new corollas with led headlight. From factory some of these cars have that flicker cut off but there are many many enthusiasts/hid fanatics that can make these color effects very strong based on cut off shield designs, etc.
Hope this helps in any way.