Well, I'm having a problem with blowing out my spark... I think. I went to the track yesterday (I won the SWFD 1st place trophy!!! ) and I was having troubles.

What would happen: I was boosting smoothly. The car made 524whp @ 22psi. I turned it up to 25psi and the car would buck badly... and the boost gauge would be all over the place. I changed the plugs and got one more good pass out of it at this boost level. The next pass: bucking again. The datalog of the engine load confirmed this... its was quickly going in and out of boost, and it was bucking like mad.

I eventually fixed it by turning down the boost a few psi (23-24 or so) and tightening the plug gap down to 16 thousandths from 18 thousandths. Running NGK 8 heat range plugs. This plug gap seems tight to me in the first place, but its what my car likes for some reason. I'm running a MSD SCI with a blaster 2 coil. Would a better coil help me out?

What kind of ignition system would you suggest for a ~600WHP car? I'm planning on getting to 650-700 whp as an end goal, so I'd like something that will support me to that point. I would consider some sort of distributorless system if that would help out (I'm currently running the AEM EMS)... I've heard that some of those distributorless systems have let a lot people open up their plug gaps significantly.

 

16 seems kinda low, i do fine with 18 thou boosting 26. On your datalogging, what was your a/f at peak boost? what's your timing maps set at? and also what size injectors are you using? how is the injector duty cycle on your datalog at peak boost?

 

I would use the 9 series injectors personally.

 

Well, I'm running 1000cc injectors with a wlbro 2545hp intank and an old dragIII inline. Timing is at 17.8 degrees... and the a/f is around 11:1. Not sure on duty cycle... I'll have to look, but I don't think they are maxed out... I'm making ~524 corrected whp at ~6000feet elevation with 1000cc injectors at a base fuel pressure of 43psi

 

I would try out the R5671A-9 plugs Stock # 5238, before you try anything else.

Tony1 reccomended these to a setup that was blowing out the spark at high boost and they solved the problem. All he was running was a blaster coil.

I would just try those out before changing anything.

 

exactly, that is what i use.