Spark Plug Cap Assembly Procedure
#1
Thread Starter
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Spark Plug Cap Assembly Procedure
I did some searches but I did not come up with what I need about the spark plug caps we use. I need an assembly procedure that includes dimensions and photographs that show the assembly procedure of the caps. Are there any out there? Dan
#3
RE: Spark Plug Cap Assembly Procedure
Try here http://www.dlenginesaustralia.com/do...apAssembly.pdf Capt,n
I just typed the question into Google search....works evertime!!!!!!!!!!!!!!!!
I just typed the question into Google search....works evertime!!!!!!!!!!!!!!!!
#6
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RE: Spark Plug Cap Assembly Procedure
Here's another 1/4-32 type assembly. If you look closely there is a spring inside the insulator that the resistor lead slides into
http://www.rcexl.com/news/Accessories/6.html
http://www.rcexl.com/news/Accessories/6.html
#8
#13
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RE: Spark Plug Cap Assembly Procedure
ORIGINAL: jedijody
It is the latter, quite a few thousand units out there happily sparking away without producing any EMI issues.
It is the latter, quite a few thousand units out there happily sparking away without producing any EMI issues.
I'm sure the EI unit wouldn't care. My concern is what the radio receiver thinks. As I have explained in other posts, we are dealing with a variable noise floor. Even in the best of conditions it can be forced quite high by extraneous RF sources. The higher the noise floor, the smaller amount of clear signal there is for the receiver to work with - even with spread spectrum technology being employed.
I would feel better if there was a way to solder the two together. One would then need a two piece nylon containment device instead of the one piece device currently used in the photos.
Ed Cregger
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warbird72 (01-20-2021)
#15
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RE: Spark Plug Cap Assembly Procedure
NM2K,
The wire can be inserted into the spring and be captured by it. That method is used in another type of ignition, similar in design, with no problems. Using that method you must be assured the urethane cap has no breaks that would permit the charge to arc over the inner boot to the outer cap.
The wire can be inserted into the spring and be captured by it. That method is used in another type of ignition, similar in design, with no problems. Using that method you must be assured the urethane cap has no breaks that would permit the charge to arc over the inner boot to the outer cap.
#16
RE: Spark Plug Cap Assembly Procedure
Some time ago Bosch did make a very goo metal shielded spark plug boots. I remember seeing them on small engines years ago! Capt,n
#17
RE: Spark Plug Cap Assembly Procedure
ORIGINAL: captinjohn
Try here http://www.dlenginesaustralia.com/do...apAssembly.pdf Capt,n
I just typed the question into Google search....works evertime!!!!!!!!!!!!!!!!
Try here http://www.dlenginesaustralia.com/do...apAssembly.pdf Capt,n
I just typed the question into Google search....works evertime!!!!!!!!!!!!!!!!
thats neat ... i always thought it was more difficult
#18
Senior Member
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RE: Spark Plug Cap Assembly Procedure
ORIGINAL: NM2K
I'm sure the EI unit wouldn't care. My concern is what the radio receiver thinks. As I have explained in other posts, we are dealing with a variable noise floor. Even in the best of conditions it can be forced quite high by extraneous RF sources. The higher the noise floor, the smaller amount of clear signal there is for the receiver to work with - even with spread spectrum technology being employed.
I would feel better if there was a way to solder the two together. One would then need a two piece nylon containment device instead of the one piece device currently used in the photos.
Ed Cregger
ORIGINAL: jedijody
It is the latter, quite a few thousand units out there happily sparking away without producing any EMI issues.
It is the latter, quite a few thousand units out there happily sparking away without producing any EMI issues.
I'm sure the EI unit wouldn't care. My concern is what the radio receiver thinks. As I have explained in other posts, we are dealing with a variable noise floor. Even in the best of conditions it can be forced quite high by extraneous RF sources. The higher the noise floor, the smaller amount of clear signal there is for the receiver to work with - even with spread spectrum technology being employed.
I would feel better if there was a way to solder the two together. One would then need a two piece nylon containment device instead of the one piece device currently used in the photos.
Ed Cregger
#19
Thread Starter
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RE: Spark Plug Cap Assembly Procedure
These are all great inputs and just what I was looking for. I am amazed that there was no soldering required. Jody's description from a previous post says it all and his last image, a "cutaway" is perfect. Jody, not to change the subject, but will the RCexel ignitions run with the pick up on the Brisons or do they have to be changed? Dan.
#25
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RE: Spark Plug Cap Assembly Procedure
ORIGINAL: Tired Old Man
NM2K,
The wire can be inserted into the spring and be captured by it. That method is used in another type of ignition, similar in design, with no problems. Using that method you must be assured the urethane cap has no breaks that would permit the charge to arc over the inner boot to the outer cap.
NM2K,
The wire can be inserted into the spring and be captured by it. That method is used in another type of ignition, similar in design, with no problems. Using that method you must be assured the urethane cap has no breaks that would permit the charge to arc over the inner boot to the outer cap.
Yes, which would make a two-piece (split lengthwise) nylon containment boot very difficult, if not impossible, to employ.
T.O.M. Roger on capturing the wire withiin the spring. So what do we home assemblers do? Just live with the arcing that will occur with a simple push fit being employed?
Yes, Jim, there is some merit to your argument that this system has been working successfully for most folks. But it makes me wonder how many planes have been lost when a larger than normal gap occurs by someone pulling the boot end while holding the cable? That solder job is going to allow for some movement. It wouldn't take much to cause a problem. The metal cover will shield the spark somewhat. I'm worried that the gap of the plug combined with the gap in the nylon holding fixture could make the spark to the engine somewhat more unreliable than normal.
I'm an RF tech by trade. I don't like unsoldered, welded or non friction clamped connections.
Ed Cregger