ORIGINAL: Sport_Pilot
ORIGINAL: 1QwkSport2.5r
In the midst of doing battle with my Super Tigre S90K carburetor I had a stockpile of various branded plugs including a Fox Long Car plug (hot) and a Fox Idle Bar (hot) plug. I tried the Idle bar plug in 3 different engines (K&B .65, TT .46, ST S90K) and none of them would stay running with glow disconnected. The Fox car plug however works rather well. I checked rpms on my S90K and noted a 200rpm drop running the fox car plug vs. my regular McCoy mc59 plugs. If the price is right, I'd use the fox non idle bar hot plugs since everyone's charging $8 or more per plug for mc59's. I can handle 200rpm less if the plug costs $6 or less.
The Fox idle bar plug is a medium heat plug, not hot. I think it is slightly cooler than their non idle bar plug.
I think their gold series plug is hotter than both the RC long and idle bar plug, and their #8 is colder.
I dont have the little package it came in handy, but the idle bar plug was labelled as hot. I wouldnt have bought it if it wasnt a hot plug. I dont know the coil's composition but the Idle bar plug has the same size recess for the coil as the fox hot car plug and look identical when lit... Either way, even if it werent as hot a plug as a non idle bar plug, it should still have at least ran without glow power on it.
I'll have to dig up that little sleeve that the I.B plug came in. It had been at the hobby shop for awhile - it was dusty! lol.