Originally posted by Rob Larner:
When I built my 250 last year, detonation was a terrible problem under boost. I ended up putting an MSD Boost Timing Master onto the car and it cleared up the knock wonderfully. The car ran great, and it only cost about $250.00 CA. So it should be quite resonable in the US. Just my 2 cents.
If a engine is knocking badly when under boost, is the correct fix to keep retarding timing until it stops? Why is it knocking badly to begin with? too much boost? too high intake temp? too lean mixture? etc. I'm thinking retarding the timing is fixing the symptom and not the cause. I'd want the ignition retard as safety, like when going up a long hill, etc.
Anyone else?
