OK, before you use an OS plug you need to find out if it's long enough.
Right now you probably look something like this: [sm=confused.gif][sm=confused.gif][sm=confused.gif]

The A5 (and OS#8 for example) is shorter than a McCoy#8 or #9 by around 1 thread. This means the spiral is not reaching far enough and the compression ratio of the engine will be way off. The engine WILL NOT run good.

I am not sure if the Force engines are supposed to use the short plugs or not (I think not) but you need to check this first, otherwise you will be posting +100 plus threads here asking why it's not running good.


edited for speeling.