496 (supercharged) spark plugs
 

Does anyone know an alternative spark plug to the NGK BR7EFS (1094)? I have a Whippled 496 that has them in it now but I can't find them locally and no one has been able to cross them propperly. All the crosses I have looked at appear to be hotter plugs.

there is a chart on line just google spark plug chart, and you do not want a hotter plug with the blower, most say 1 colder, Rob

Thats the problem, I have looked at the plugs that cross and there insulators all stick out past the threads, the BR7EFS's do not. So they appear to be hotter plugs. I guess I will just have to order them.

What do they cross to in an AC ??????

An AC R41T is a pretty cool plug and is not an extended tip. Its the stock plug for the older merc blower engines.

Plane,

BR7EF S
Thread….14mm
Hex……0.8125
Reach….0.7500
Seat type…..Gasket
Electrode….Std Nickel
Projected tip…..Yes


The following are a direct cross for the above plug. I would recommend you do examine these side by side to verify dimensions.
AC…..R44LT
Champion….RS9YC
Bosch…….HR7DC/HR6DC
Denso….T20EPR-U
Motorcraft…..AGSF22C/AGSF2


Bob

Thanks a lot Bob!

Try www.sparkplugs.com

You can try a NGK TR7IX, iridium fine wire.

Thanks,
Dustin