RCdude13

My Feedback: (6)

I'm converting my ZDZ80 ignition over to an RCexcel unit (the Falkon unit is pooched). I have to use an adaptor to use the smaller NGK CM-6 spark plug. I noticed that the CM-6 does not extend as deeply into the combustion chamber because of the adaptor. Is this a problem? Will I lose horse power? Will i need more than 28* of spark advance because the spark is further away from the piston? Has anyone done this conversion and noticed a difference?

DemonDean

My Feedback: (4)

Did you buy the new Ignition?
If not, just buy the one to fit the original plug.
I think it would be a BM6RF.

Dean

RCdude13

My Feedback: (6)

I already had the ignition which uses the CM-6 spark plug.

aussiesteve

28 degrees will be fine and you may actually gain a little power due to the ignition change.

You can also change the plug cap over to go to a cap that suits the original plug. They are pretty easy to change. Parts and instructions on how to are available from the RCExcel dealers. (PRC Model is one who is located in Canadia).

MetallicaJunkie

i would go that route, use the plug cap that your engine utilizes to eliminate possible variables in perfomance..... it's a lot easier than it sounds/looks.... i did my first spark plug cap replacement in the office, with only a lighter(heat shrink tubing) some needle nose pliars to crimp and a razor blade to strip the wire insulation..... if you can put together an arf you can easily do a ign cap replacement job

this page helps http://www.rcuniverse.com/forum/m_10...m.htm#10725941
so does this one http://www.rcaer.com/userfiles/file/...Plug%20Cap.pdf

http://www.rcuniverse.com/forum/fb.asp?m=10720634

RCdude13

My Feedback: (6)

I will switch over the cap since I already a replacement cap from RCexel for a BMR6F plug. My only question now is how do I attach the coiled wire which snaps on to the top of the plug to the ignition lead? The ends of this coiled wire bend 90 degrees and then have a sharp point. Do these sharp points stab into the sides of the ignition wire insulation? All the pictures I've seen on converting caps are for CM-6 plugs.

BadAzzMaxx

Yes,
but put the small peace of heat shrink on the wire before you install it and then pull it over the coiled wire(just up to where the coil stops) and shrink it down.

dirtybird

My Feedback: (5)

I took one of those caps apart to replace it with a cm-6 cap. Yes the sharp point is just shoved through the insulation to make contact with the wire within.

RCdude13

My Feedback: (6)

That's what I thought Dirtybird. Thanks. Should I extend the bare ignition wire into the coils of wire? Thanks again for all the advice guys!

dirtybird

My Feedback: (5)

You don't need to, but you can if you want to.