Anyone running NGK R5671A-9 plugs on higher boost applications?
NGK Racing Plug

I'm told, and NGK states, that a protruding electrode plug like the TR6 is not suitable.

 

I had been running the ngk 9's the whole time I was on 20+psi. No problems here.

I was running the b9efs plug though.

 

You guys have part numbers for them? The coldest I have found local is TR7 and they don't have a protruding electrode.

 

The above mentioned racing plugs are available in various heat ranges. Just change the -9 to whatever heat range you are looking for. The racing 9's also go by stock number 5238.

For standard style plugs like the B9EFS, replace the 9 with the heat range you want.

More plug info here: https://ls1tech.com/forums/8499298-post7.html

 

Here's a couple of pics of how the TR6's sit.

 

I would have thought you'd be running a 7 heat range in there. A TR6 is way too hot of a plug for the boost level you're running if you're doing it on pump gas. Anything higher than a 7 if I recall is only made in a non resistor form and can cause RF problems with the stock ecu's.

 

I run TR6 .032ish 8lbs boost on pump not a problem...most guys on the LS1 site run the TR6 or BR7EF..i am seeing either one work...

 

I have TR-6 in my setup, but I am only at the 14PSI mark. These were recommended to me by numerous reputable tuners. FWIW I have had no issues in the last 8 months with them.

 

I have NEVER seen non-resistor plugs cause RF problems with our PCMs.

 

Yes, I have run the -8 version but currently run AR94s in the Camaro for higher boost.