Delco Plugs

I recently bought a set of delco iridium 14-101 plugs. Does anyone know if these are any colder than the stock heat range b4 i put them in? 99 GTP, 3.4 pulley, CAI, TB spacer, DHP pcm. Im running nGK tr6s now and having trouble with them at higher speeds. Maybe a little to cold. Are the delcos that i bought a much better plug? Let me know thanks.

41-101's are stock heat range and 41-932's are 1 colder

thanks big L

41-101's are stock heat range and 41-932's are 1 colder

Going to start calling you TAZ. Nice :bricks1:

big l, do you what plugs to use for my 3800? no supercharger...i have same prob with tr55s. is it too cold? or not cold enough? around 4000rpm, gets a little silly, misses sorta.

The TR55 is recommended for GTs.From your other post,it sounds as if you are having a problem with plug wire's and thats what might be causing your miss at around 4,000 rpm.Just remember that the TR55 plugs are copper core and will require them to be changed more offten then the platnium or Iridium plugs.

~Larry~

thanks big l, i forgot to mention that they are plat tips tr55's. i also jsut got new wires in, the RIGHT ones. taylor 72210's i'll let you know how they work by the end of the week. also, do you think that my ignition module could go out from putting stronger coils on it? i put stock ones back on and it runs ok now.

do you think that my ignition module could go out from putting stronger coils on it? i put stock ones back on and it runs ok now.

Nope,it shouldnt be a problem.

NGK plugs are like this

TR55 copper core
TR55GP Platinum
TR55IX Iridium