will a F6dc4 work,turbo guys?Uping my NOS to 175 shot,can't slow timing HFM engine.Holley recominds 2 degree retard and two step colder plugs to control spark knock.I'm running with a 125 shot stock plugs and timing,want to increase flow by another 50hp.So my thinking would be to step down plugs,or water injection.But plugs are cheaper.

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt