Ignition on engines with two plugs per cylinder

Free and Open Source Engine Management discussions excluding more specific things on this board.
GrowlingandBiffo
QFP80 - Contributor
Posts: 56
Joined: Sat Apr 26, 2008 7:42 am

Re: Ignition on engines with two plugs per cylinder

Post by GrowlingandBiffo »

This explains the benefit for Classic Racers (Bikes) most Norton's have an offset spark plug, so putting one on the other side balancing things up a treat.

http://www.mez.co.uk/mezporting/page2.h ... conversion

We are convert a Commando shortly, so will see what improvements we can measure...yards/horsepower ect
deviousKA
QFP80 - Contributor
Posts: 43
Joined: Tue Apr 01, 2008 10:36 pm
Location: Id, USA
Contact:

Re: Ignition on engines with two plugs per cylinder

Post by deviousKA »

Nissan/datsun NAP-Z engines (twin plug) fire both coils simultaneously up until heavy acceleration or engine loads.

NAP stands for National Air Pollution something or other, and these started coming out in the mid 80's.
User avatar
johu
QFP80 - Contributor
Posts: 57
Joined: Sat Aug 16, 2008 4:39 pm
Location: Se oli ainakin näiiiiiin iso!

Re: Ignition on engines with two plugs per cylinder

Post by johu »

http://www.honda.co.nz/technology/engine/idsi/

Some info from Honda about their i-DSI dual plug setup. There's also animation on right hand side of page, click play and wait for a while to see it in action.
Post Reply