0.8mm to 1.1mm depending on plug and application. If they are iridium's or platinum's best not to regap them, you can damage them easily.
The gap is 1.1mm If you mean the GAP, then you are looking at the following plug types at the bottom:
E.O.I. for a Z related, technical job? Surely between the 3 of us a new business venture would be full of beer, shennanigans, and wacky engine transplants (v8's and otherwise). EDIT: why does E.O.I. without the full stops get edited as *** when the thread is submitted? that's weird... Anyone else have that problem?
Thanks guys, these plugs are 4.4mm.... might tap them down a bit. We are all talking about this right? Just to be sure??? ALSO: Thats 20 thousandths of an inch for you oldies. (I only had old tools )
I'm pretty sure it has to do with the heat the plugs produce and a bigger/smaller spark. I'm really not sure ether, and dont expect a straight answer on the first go
all of the fuel mixture burns as good as it possibly can giving you an engine that works as best as it can.
Correct Spark plug gap is needed for both performance and preventing mechanical engine damage (such as colision between the plug, valves and / or piston. Larger gap can make the spark blow out by excessive boost or supercharging. The ideal gap is determined by the compression ratio, and other factors such as how resilient the coil pack is at 'recharging' after an ignition event. With the z32, this is not really an issue, moreso in dizzie'd V8s with a single coil. In simple terms, the plug ignites the fuel, and initiates the flame front, which starts as a 'kernel' and spreads outwards from the propegation point. The reach of plug allows the flame front to propegate deeper into the combustion chamber, but as mentiond before, can be exposed to too much turbulence or impact from the rotating assembly. The flame front propegates at a relatively set speed, this is why spark advance increases with RPM.
