Ok, i tried serching but could not find the original thread.

How does replacing the traling spark-plug with a metal plug eliminate the risk of detonation?

Does anyone have any insight to how it works?

Results, data, testing?

Does eliminating the traling spark-plug create any power loss, bad fuel consumption?

 

Where is BATMAN when you need him? No, seriously. I'd like to find out what the general concensous was on those bolt-things. Something tells me they are completely unnecessary, but I might as well stick around for some more opinions.

 

Jason has already installed it.

I think we are waiting for the dyno tuning results.

Scroll down and look at the similar threads and u might find some useful info.

 

https://www.rx7club.com/rotary-car-performance-77/found-out-what-anti-det-device-313396/

 

May be common knowledge around here, but according to Kenichi Yamamoto's Rotary Engine book, the reason is two-fold. First and usually the case, the combustion chambers early exposure with the pre-heated insulator of the trailing spark plug can cause pre-ignition and second, it can also happen at the trailing plug since the trailing part of the rotor is still compressing gasses along the rotor housing after the leading has fired, but before the trailing has fired ceating multiple flame frame fronts.

 

yeah but isnt the point of having two plugs that the combustion chamber is long and one plug will not burn all the fuel.

 

Yeah, but the FD also has another leading spark 180 degrees later in its 'cycle' that helps to burn a little more of the air/fuel mixture than trailing alone. You can call it 'Late Leading' if you want. FCs have it too (as do 1st gens and older rotaries with direct fire conversions).

 

how about making a housing with a late leading plug that fire a few like 15-20 degrees after the leading plug?

 

You mean below the normal leading plug? I'd be affraid of excessive blowby.

 

yep

 

Again, I'd be affraid of excesive blowby if there were a spark plug hole any lower than the stock leading hole. Flaking chrome has a similar effect.