What type of spark plug do I need to run to retard spark timing?
I'm running BKR6EGP platnium spark plugs
I would like to try retarding timing in the rear most cylinder #4

 

what?!?!?!?!?!?!?!? Hyper?

 

The free electron density of the metal used in the spark plug could have an effect on the speed of electrical conduction but probably not significant enough to effectively retard timing?

http://en.wikipedia.org/wiki/Free_electron_model

 

This thread is confusing me. Why?

 

To properly retard timing, you need a retarded plug. Something like a Pulstar. A Bosch+4 would do in a pinch.

 

 

Maybe get a really long plug wire, or tie it in a knot. That should make it slower. Like short bus slower.

 

I was wondering if any of the ones in the following link would be retarded enough?

http://www.gaijinriders.com/showthre...k-Plug-Reading

 

simple! stock type, but you'll need to drill new spark plug holes under the exhaust ports.

 

Because it is retarded.

 

What just happened here I don't even

 

Nope. This is real.

A plug with a tip that extends further into combustion chamber will have advanced timing.

Recessed plug like ngk race plug will burn all the fuel a little later.

 

I guess Faeflora is correct. In this case it might be possible to achieve the same results with standard plugs with a slight modification.

(I am searching for the formula for the relationship of retard vs copper washer count.)

 

yah you're pretty much fukked

remember that the combustion chamber duration is variable depending on RPM. That means that the effective retard is greater at lower RPM and less at higher RPM. that = suck a dik

as for OP.

No. Not gonna happen. Sorry. Tuning your motor like that will lead to fail. It is better to address your fueling and timing and airflow vs. combustion timing. Keep in mind that a big old kleenex box will, in boost, provide pretty darn equal airflow to all cylinders. boner

 

OP, I think I've figured out how to do it.

First, you'll need a capacitor installed inline with your spark plug wire. You'll need a capacitor of the "flux" variety - I'm sure you've heard of them - probably going to be tricky to find, but keep looking.

Once you've got the capacitor installed on your spark plug wire, you're going to have to run a signal wire to the ECU, and run a 2D map at 5v PWM using RPM as your trigger. You'll also need to install a servo at the capacitor to adjust timing. The reason for all this crap is that you'll need to vary the time of the capacitor based on RPM.

When you've got everything hooked up right, here's how it will work: The coil will fire at what the ECU thinks is "correct timing". Spark will travel down the wire where it will meet the capacitor. The capacitor will take the information which it receives from the servo, (remember, servo gets it's information off of 2D map of RPM,) and it will literally send the spark event a few milliseconds into the future. Since the spark won't be "collected and re-discharged", you will still have the full power provided by the coil-pack, it your spark plug will simply see the spark a few milliseconds (or tenths of milliseconds, if you like) later.

Dr. Emmett Brown, eat your heart out.

 

I'm 99.9999% positive the answer lies somewhere with zipties.

 

Seriously, this is only proven to get you 88 mph, and then who knows what will happen

 

Its simple: do a spark plug re-route.

 

i can tell that you bitches hate when i am rightqq

 

After crunching paschen numbers the initial results looked promising. I soon realized that this approach could never be more than a partial retard solution as the threads of the plug would no longer engage with more than 20 washers.


Discouraged but not for long!
This is a brilliant and inspiring solution!

It is now possible to achieve full retard with careful modulation of the 5th injector and spark plug.