someone told me you could put bosch quads in a 13b motor. is this true? does it improve anything? whats the part #s?

 

They will physically fit but DON'T DO IT!!!!! Bosch actually has a bulletin on their website about using those plugs in rotary engines. There is some strange vibration that causes the ceramic element to break off and fall into the engine. I experienced this firsthand in my old n/a engine. A couple of months later I saw the bulletin. When I pulled my engine apart you could tell which one broke and which one didn't by the scratches in the rotor housings. The plugs that work for me are the NGK BP-7ES (6-9 heat range) motorcycle plugs. I cut the strap down to make it side fire and then regap them. This is still only beneficial with the addition of an ignition box. These plugs still have to be changed very often due to ceramic cracking and these are tougher plugs. To be absolutely safe just stick with the stock style plugs or you may find yourself rebuilding an engine soon.

 

Why bother. Even if they remained in tact, what noticable benefit could they really offer?

If you desire some high tech application then rustle up some of dem dare NGK iridium fancies. Waaahooo!