ZDZ & RCS Support Direct support from Mike Dooley of RC Showcase for all your ZDZ and RCS Engine questions.

ZDZ ignition

Reply
Old 08-09-2009, 02:19 AM
  #1
helifant
Thread Starter
 
Join Date: Jul 2004
Location: St HelensLancs, UNITED KINGDOM
Posts: 16
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default ZDZ ignition

Hi
Am I right in assuming the ZDZ ignition ADVANCES the spark once running. As set up by the instructions the static timing before starting is only a degree or two before top dead center. All my three other ignition units are set initialy to 34 degrees before top dead center static and then RETARD the ignition according to RPM up to this maximum.
helifant is offline  
Reply With Quote
Old 08-09-2009, 10:57 AM
  #2
k_caller
 
k_caller's Avatar
 
Join Date: Feb 2003
Location: Leonberg, GERMANY
Posts: 108
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ ignition

no, start by placing the ignition point at about a max of 3mm BTDC. You can even make it closer to virtually almost 0.02 BTDC if it remains hard to start.
34° is way too much.
k_caller is offline  
Reply With Quote
Old 08-09-2009, 03:35 PM
  #3
helifant
Thread Starter
 
Join Date: Jul 2004
Location: St HelensLancs, UNITED KINGDOM
Posts: 16
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ ignition

No you misunderstand my OTHER 3 engines are set at 34 degrees and start and run perfectly which means the ignition units are retarding the ignition according to engine speed.
The ZDZ ignition on my engine if set from the instructions ie. 6mm from center if sensor to center of magnet fires the plug a degree or two BTDC. which means that if the ignition unit is like my others it CANNOT advance more than this. Only retard. This is why I think the ZDZ ignition ADVANCES.
If I set the timing to 3mm of Piston Stroke BTDC as sugested on some website it gives 33 degrees BTDC.
I have also seen 0.3 mm sugested on other websites which is the same as setting the timing as shown in the manual ie 2 degrees BTDC.
helifant is offline  
Reply With Quote
Old 08-23-2009, 01:16 PM
  #4
helifant
Thread Starter
 
Join Date: Jul 2004
Location: St HelensLancs, UNITED KINGDOM
Posts: 16
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: ZDZ ignition

Hi
I was right about the ZDZ ignition it does ADVANCE the timing.
confirmation by Mike at troybuilt models.
helifant is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 08:42 PM.