looking for cold temp plugs for my turbo ls...if anyone can throw me model numbers of whatever brands that would be great thanks.

and also is it bad to run cold temp plugs for just a reg. engine?

 

The stock LS plug is a 5 range(ZFR5F-11). You can run the stock B Series VTEC plug(BKR6E-11) if you want 1 step colder, or the BKR7E-11 if you want 2 steps colder. The "-11" portion of the part numbers means they come pregapped at 1.1mm. You can drop that portion of the part number if you want plugs that do not come pregapped. Most retailers also track plugs by their stock number instead of their part number, so follow the stock numbers below if that's the case with your local parts store.

BKR6E 6962
BKR6E-11 2576
BKR7E 6097
BKR7E-11 1283

These are all NGK copper resistor type V-power plugs.

 

NGK 3330 - BCPR7E I run these on set-ups to about 500whp

Anything over that I use the 5238. The iridium's also have a resistor type plug if you are wanting a resistor type in the -9 heat range.

 

whats the main difference between the bkr7e and bcpr7e's?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">whats the main difference between the bkr7e and bcpr7e's?</TD></TR></TABLE>
I believe the main difference is that the BKR's are ISO height(50.5mm from the seat to the top of the terminal) while the BCPR's are JIS height(53mm).

 

thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by inspyral &raquo;</TD></TR><TR><TD CLASS="quote">
I believe the main difference is that the BKR's are ISO height(50.5mm from the seat to the top of the terminal) while the BCPR's are JIS height(53mm).</TD></TR></TABLE>
the bcpr's also dont have the v shaped electrode
http://www.ngk.com/results_cro...&y=10

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">
the bcpr's also dont have the v shaped electrode
http://www.ngk.com/results_cro...&y=10</TD></TR></TABLE>
Ah, good to know

 

i wonder why some use the bcp's and some use the bkr's. Ive always used bkr7's without any issues. It sounds like the v-shaped electrode would be better.

 

I know my plug wires are stamped ISO, so I guess it depends on your plug wires, although I can't see a 2.5mm difference in height making that much of a difference. If you use an ISO plug with JIS wires, I can see how there could be a potential problem with the wires not reaching all the way, and if you use a JIS plug with ISO wires, they might sit a little higher than normal when seated on the plug. Again, I can't see such a small difference in height being all that critical, so it probably just boils down to preference.