clevite bearings needed and NGK plugs

Any one know where I can get clevite hemi main bearings and rod bearings 10 over. I was told they were not available in the main bearings by several people, but one phone call to clevite\mahl and they have CB1512 V rod bearings in std and 10 all in stock. The mains are available in MS 1795V IN STD and 10 over. The 20 over are in stock but in the Ms and are being discontinued. The problem is they will not sell to me, say to order through car quest which are $191.00 for mains only which is un heard of. any suggestions? I have called all the name brand parts stores and tryed RWR motorsports and wizards with no luck. Wizards has a federal mogal brand but I have never used. thanks for any and all help Howard.
PS what about using the NGK 6061-9 instead of a 6061-10 in a blown hemi. The 9s are $3.00 cheaper per plug.

 

PS what about using the NGK 6061-9 instead of a 6061-10 in a blown hemi. The 9s are $3.00 cheaper per plug.[/QUOTE]

I've found the 9's are too hot for me to read, but I'm just a puller....

 

plugs

yeah i'm using the B9ES's with good results.why are the 6061's popular now?availability or a performance gain?should i have removed the gasket rings from my plugs before install as i recently heard.i ran 6 passes with them still on and it all seemed ok...526 kb hemi...thanks......

 

Plugs

How about the R5671a-10? They are supposed to be the same thing as the 6061-10 except for the 5/8 hex. They are about three bucks cheaper.

 

When the porcelain is hotter also is the steel shell around it and therefore it colors more, but once it colors 360° around it thens begins to travel down into the threads.
Would you agree? or?
So if your coloring threads on a 9 wouldn't switching to 10's simply put the coloring back into the top of the plug vs the threads???

 

I have a dart big m with brodix solid heads and a 1471hh.I am running the r5671a-9 ngk plug.I have good luck is this the correct plug for my application?

 

It sure seems to me that the 9's burn the color off of the shell before the 10's do, and I have seen it in some other motors besides mine.. the coloring of the shell is what I've been reading. Doesn't the 10 have more steel mass around poecelein? it looks like the poecelein is shorter in the 10. Maybe there's something else here I don't understand. I'll keep rereading!!

 

Yep, Lucky, the porcelains are different thats what makes the different heat ranges.
I've never had a reason to mess with heat ranges until after this last season, but I thought changing heat ranges would change the reading on the plug.

 

6061 versus r-5671-a

the colder the plug the shorter the porcelein surounding the center electrode allowing the heat to disipate from the tip of the center electrode to the outer body. My understanding is that the 6061 was made with the larger 13/16" outer body so as to allow the heat to transfer at a great enough rate to make the -10 over the -9 a rellevent change. Also the ground electrode is only equal to approximately a -8 before it lights from slow disipation of heat as well. They made the ground electrode shorter and wider on the 6061 plug to increase the disipation rate also. But I have not used either for a while and understand they went back to the narrower groundstrap. As for if the -9 is a safe alternative or not, I believe there are to many factors for someone on this tech forum to be able to safely comment on weather or not you will get away with them or not. In my opinion, use caution and at your own risk!

Mr.bigwrench