spark plugs

[87-TURBO-T]

can somebody recomend a good spark plug for the combo in my sig? thanks

 

[The Darkside]

NGK UR-5's (#2771)gapped @ .032 ...

 

[WhiteTType]

AC Delco R42T

With the iron heads and stock ignition, we had the best luck with AC Delco R42T spark plugs clip gapped at 0.032".

The R42T is actually a marine plug that has a very wide side electrode.

 

[pajo]

plugs

I've always liked AC -CR43TS plugs which are commercial heavy duty and the electrode is double the width of regular spark plus gapped at 0.32-they run just a tad cooler then regular AC43ts -give them a try ,they might do you good ..

 

[Turbo Indian]

ask 10 people & get 10 answers. when I ran iron heads, it was CR43TS for the street gapped @ 30-32., & race was CR42TS gapped @ 28. yes 28 for race because @ higher boost levels you will blow out the spark with a large gap. the R plugs will work fine, but the CR plug are a better plug.

 

[turbojd]

All the plugs listed above work great, it's your choice as was said.

 

[Boost231]

i liked the ac cr42ts for years till i found out about the ngk ur5's. get ngk UR5 and gap at .032