On certain applications, the area immediately around the headlights is really tight, and there is no place to put a ballast, and to make it more difficult, the high voltage wire cannot be extended. This means, that you are out of luck if there is no place to put the ballast within reach of the wire. With a separate ignitor, the ignitor is much smaller than the ballast, and there is almost always room to put it withn reach of the high voltage wire. Then, since the ballast to ignitor wires are almost always low voltage, you can extend them to mount the ballasts anywhere where there is room.
Consider the case of the NSX. With the Philips integrated ballast/ignitor, you are pretty much forced by the length of the non-extendable high voltage wire to velcro or tape them to the top of the shock towers. This isn't the optimal solution, because there really isn't any place there to bolt the ballast down, and the high voltage wire is pinched between the hood and headlight bucket.
With a separate ignitor/ballast setup, you can extend and run the low votltage wires through the holes that run from the headlight bucket to the underhood area, and mount the ballast where you like. I have mine on a custom built bracket behind the spare tire. This wouldn't have been possible w/o the separate ballast/ignitor. In the installations I've done, I've piggybacked the ignitor on the sealed cap,
which conveniently let me use the open spots in the factory wiring harness, with the other end coming out on the large connector near the headlight bucket.
I've personally installed over 20 kits on various applications, and the separate ignitor definitely made things a lot easier to do a clean/thourough job.
-Ben
Originally posted by madfast:
Ben,
I actuall think that by having the igniter integrated into the ballasts is much easier for installation. I have 2 cars with the Hella and installation was a breeze. with a separate igniter, especially when installing on a nsx, u have to look for a place to tuck it in and secure it either with cable ties or drilling holes.
[This message has been edited by Ben (edited 30 November 2002).]