Viggen, pen your TracerSmokeEmitter.ini included in WW2 Effects pack, and change line:
[EmitterType001]
Name=TracerSmokeEmitter
EmissionType=POINT_EMITTER
UpdateType=NON_MOVING
MaxVisibleDistance=1000.000000
EmissionRate=0.0035 -the higher values the lower tracer data and higher framerate
ParticleUpdateType=RANDOM_MOVING
ParticleRenderType=SPRITE
ParticleLifeTime=1.00000
ParticleLifeTimeDeviation=0.500000
ParticleWeight=0.00000
ParticleRandomness=0.0
ParticleWindFactor=1.0
ParticleColorTableType=LINEAR
ParticleColorStart=0.6000000,0.600000,0.8000000,0.400000
ParticleColorEnd=1.000000,1.00000,1.000000,0.1000000
ParticleSizeTableType=LINEAR
ParticleSizeStart=0.200000
ParticleSizeEnd=0.40000
BaseSizeDeviation=0.2
TextureMaterial=TracerSmokeMaterial
I suggest changing "EmissionRate=" from 0.0035 to 0.005 or 0.007
@Brain32 : eager to see it!