HI I want to know to some body have or due the swap in 96 cobra to convert the coilpack system in coil on plug and what is the benefits he obtain if gain horsepower and better spark blown ?
What Tabres said, actually there is a reduction in ignition system performance at high boost/rpm since the wasted spark ignition will be telling the coil to fire every compression stroke and exhaust stroke (wasted spark). Now the coils are designed in the 99+ application only fire on the compression stroke and thus have more time to re-energize before being fired again. In our cars with COP conversion the coils don't get as long to re-energize before discharging again which can lead to weak spark and spark blowout. Typically you can just tighten the plug gap and not worry but if you're shooting for big boost it may be a factor.
FYI I've converted to cop and spin my car to 8000rpm, with no issue.
Over 800rwhp here with waste spark COP. Running a pretty tight plug gap at .22, too.
Are you still running TR6's, I am thinking about switching to some iridiums like the tr55ix or tr65ix's. Also are your coils lower mile OEMs, I am thinking of buying some new or really low mile OEM coils to try and help mine out. My plugs are gapped even tighter than yours are and we ran out of steam at 23 lbs of boost. Oddly enough though while playing around with my boost controller to try and help the turbo spool faster I saw boost spikes of 22 or so lbs and never got a hint of spark blowout on the street. Not sure if a loaded dyno can make it more prevalent or not.