For an all-motor car which spark plugs are better to run, a hotter or a colder spark plug? Just curious b/c I heard so many different answers from ppl! Some say hotter, while others say colder!

Give me some feedback and post what type of plugs you use/recommend and why?

 

I've had success running colder in my GSR both with a JRSC at 7 psi and with a different set-up all-motor at near 13:1 compression. Ran BKR7E-11's on both set-ups. Copper electrode, 1 step colder that stock GSR plug. Cheap too

 

yes colder ngk's for everything

 

Thats the plugs I used when I used to spray on my old motor

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22coupe &raquo;</TD></TR><TR><TD CLASS="quote">I've had success running colder in my GSR both with a JRSC at 7 psi and with a different set-up all-motor at near 13:1 compression. Ran BKR7E-11's on both set-ups. Copper electrode, 1 step colder that stock GSR plug. Cheap too </TD></TR></TABLE>

cool i need new plugs too so now i know what to get

 

why is colder better

 

I think cold plugs should only be used for force induction. When I squeeze and use cold plugs the car runs great. When I'm not squeezing and just running all-motor, using the cold plugs the car doesn't seem to be pulling as hard compared to regular plugs. That's just my opinion.

 

high compression n/a, boost, nitrous, all raise cylinder pressures and temperatures just by slightly different means

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Revhard92si &raquo;</TD></TR><TR><TD CLASS="quote">I think cold plugs should only be used for force induction. When I squeeze and use cold plugs the car runs great. When I'm not squeezing and just running all-motor, using the cold plugs the car doesn't seem to be pulling as hard compared to regular plugs. That's just my opinion.</TD></TR></TABLE>

 

The heat range of the plug indicates its ablilty to dissipate heat. If you are running high compression, boost, or nitrous, you want a plug that runs colder to suppress detonation. If you do alot of low speed (RPM) driving and aren't looking for maximum performance, use a hotter plug as it will run hot enough to burn off carbon deposits and prevent fouling. A heat range of 4(hot) - 7(cold) is what you want to stick with.

 

Thanx if the info!