Side Gapping Plugs & getting more power out of your car!

[destrukshn]

mine started misfiring at 220kw.
was fine at 200kw.
standard ignition system, besides ngk leads, which were quite new anwyays, with heat range 7 plugs gapped at 0.9mm

currently using (suggested by slaz, and not looking back haha) motec CDI, external, crane coil, magnrecore custom leads, and heat range 8 plugs gapped at 0.7mm.
currently pushing 250kw and no problems or misfires, what so ever.
also using a s300 ecu.

[CRXer]

how was the health of the original oem parts?
wiring,rotor,cap,coil,icm?

[Limbo]

yeah didn't get the CDI

I've got a cranes coil, vision cap & vision leads, NGK platinium plugs gapped at 1.1mm i believe with a 6 rating

Previous setup was 162kwatw, this time prob abit more....

[beeza]

My set up is:

MSD box,Cranes coil,Modified Oem dizzy cap,Oem leads,NGK Iridium plugs - high heat range with a 1.3mm gap (misfires at 1.5mm).

And I am pumping out 69kws! LOL!!

[CRXer]

sell the ignitor & coil beez,put the money on red or black a few times & ur chances of better results will improve dramatically.

[fatboyz39]

Stock ignition system is more then enough. We run standard ignition on our mild built b20with E85.

[Limbo]

hmm i wonder how big a gap i can run

Breeza - which cranes coil u got? i got the LX91

[Slaz]

Stock ignition system is more then enough. We run standard ignition on our mild built b20with E85.

Your not looking at 200+KW or the cylinder pressures that turbo engines produce that literally blow out the spark, 150KW/12-13.0:1 would'nt present a problem for the stock ignition system.

In saying that, people both n/a and boosted produce big power on stock systems, but they will pop,fart,carry if every component isnt near new and then rev's play a factor as it is often raised considerably with most of the engines producing big power.

[beeza]

hmm i wonder how big a gap i can run

Breeza - which cranes coil u got? i got the LX91

Sorry Limbo,missed the post.

Yes the LX91 also,dsp26 recommended it to me.It's great,definately a great coil.

Where is dsp26 these days,haven't seen him for ages...

[TODA AU]

hmm i wonder how big a gap i can run

So everyone knows...
The gap ended up at 0.8mm (10psi - 11.8:1 AFR)
There was a nissue with 1 plug lead also that needed to be recrimped.
So the miss fire in the top end could have been either the plugs at 1.1mm (likley)
Or the spark lead that fell apart when checking the plugs (less likley)

[JohnL]

Yor the cylinder pressures that turbo engines produce that literally blow out the spark,

When a power stroke misfires the spark doesn't get "blown out", it fails to eventuate. When cylinder pressure is increased it takes more voltage to jump the plug gap with a spark.

This is why you can get a plug that sparks fine when not installed in the cylinder (i.e. at atmospheric pressure), yet fails to fire the cylinder when it is installed. This is also why such high voltages are required in the HT side of the ignition system (if it weren't for cylinder pressures then much lower voltages would work fine), and why some OE coils (typically older designs, pre 'electronic' ignition) need to be replaced with higher output units when CR is raised or the engine is supercharged.

[fatboyz39]

Your not looking at 200+KW or the cylinder pressures that turbo engines produce that literally blow out the spark, 150KW/12-13.0:1 would'nt present a problem for the stock ignition system.

In saying that, people both n/a and boosted produce big power on stock systems, but they will pop,fart,carry if every component isnt near new and then rev's play a factor as it is often raised considerably with most of the engines producing big power.

Oh... hmm if i add a blower to the end of the motor it might hit 200kw? meh ....

stock ignition ftw

You turbo lads stop fiddling around with tiny stuff and start racing.