end cap with disc
Reg,
what i found with the open end cap and scavenge disc,is that the predators pull harder at 4000 + to 6500. just the open end cap gives best all around performance. closed end cap with 12 scavenge disc seems to be good for touring/mileage. why all this is so,i'm not sure.i do know is,if you put your hand on the back, off the open cap,you feel warm air popping.then,put your hand along side the scavenge discs,the air is much cooler...... i don't know why,it just is. that's how i found out it's 'working'. strange thermo-dynamics to me.i would have thought the air being 'scavenged' would be warmer from the side. it's actually rather cool. try it and see what you think,then post. i'm curious to know...
greg