hey everyone ,been having dramas with my a15 and im thinking of ways i can fix it

well i have a fairly worked a15 with twin 40mm carbs 12:1 comp cam and a rebuild aswell as a heap of other stuff

at the moment im running an msd 6al2 ignition box with a bosch mec717 coil and has been awesome and was a noticable different in torque from my old stock coil and points ,plus it has a limiter and launch control

now ,when i am doing (i know it sounds bad ,but its at the drags) a burnout ,it will be fine and easyily hold 3rd gear on the spot with both wheels

1) under load for 20 odd seconds ,starts to ping when slightly past half on gauge
2) 3/4 down the track it will splutter and miss so i get off the throttle ,as i come back to the pits it is running on 3 cylinder(maybe 2! ) and then if i give it a squirt in a straight line after letting it cool down it will clear up and be fine again
3) if i hold a burnout on the spot for about a minute it will start pinging and will only be slightly over half on the gauge


motor never gets hot ,it sits on half on the gauge on the freeway fine and doesnt get hot in traffic

so im thinkiing the plugs are getting too hot and are glowing and causing the missfire ,that cylinder floods then clears up after a big squirt

im running bpr6es plugs and it didnt used to do the misfire when i was running bp4es plugs

i was looking on youtube and am considering water injection as a fix for the pinging as it would lower intake temps and control pinging at the same time as giving it a little more power

anyone know what plugs i should be running and if water/meth is a doable thing with 4 intake tracks???

also i have the timing set at 10 deg static but need to recheck total timing ,if i run water injection i can run timing to make more power but still have the pinging sorted

cheers

http://www.youtube.com/watch?v=Zeervwwj_IQ drags