ORIGINAL: DarZeelon
ORIGINAL: Konrad
The OS plugs are too short! OS did not respect the industry standards for long and short reach glow plugs. Therefore they don't fit most other engine makes that do respect the standard for a long reach glow plug.
We engine designers have spent a lot of energy fitting the glow element to the combustion chamber. It does yield very favorable results to have a properly fitted glow plug (element).
Konrad,
OS 'mid-length' glow-plugs don't even fit properly into engines made by.... OS!
OS engines .32 and larger, have heads that are designed for 'Long' glow-plugs.
The depth of the threads is full length; and the OS #8 remains recessed in the combustion chamber, when installed into them.
OS does respect the industry standard for long-reach and short-reach plugs... It is only their glow-plug division that does not.
Thanks, This confirms what I have said for a long time about OS's engineering. In this case their parts don't even fit within their own product line.
In the real world of high performance the OS plug ( for the most part) is a weak sister, both for performance and durability. One of the best 1/4 x 32 glow plugs I used was the OPS 300. Now that glow plug fit and could withstand the rigors of a 20K+ rpm ducted fan engine