Just got new plugs for my 2.2 liter type 4. New plugs on the left. WR7cc+. The old plugs WR7dc+, have a longer electrode that sticks into the combustion chamber further. Can anyone tell me if the shorter electrode will have any effect on the engine? The old plugs were made in Brazil and the new ones in Russia.

Can't tell you until I see if the heat range of the plug is different. It's to late tonight to go looking for a heat range chart.

Initially, the only effect is to lessen the chances of the piston hitting the plug, but you didn't have that problem anyway. Perhaps the longer electrode provided for better ignition of the fuel/air mix in the combustion chamber.

Maybe the Russians are just shorter by nature so they make things shorter.

Really you should pull a head and see how the plug indexes into the combustion chamber.

Both 7's as far as heat range goes.

CC is 1mm and DC is 2mm electrode.

CC is correct for a T4

Bosch are crap these days...India, Russia, China, Thailand. Crap pure crap. NGK or nothing.

plus 1 on the ngk.

Looks like your running very rich and that plug was not tight.

The plug was tight. The valve guide wasn't.

CC is correct for 914s (as well as 911s), extended tips (DC) aren't.

The Cap'n