DZ Spark Plugs?

[DarrenX33]

NGK appears to have a million different indentifiers for their plugs. How the heck did you decode UR5 for your L78. My car decodes to B6S for an R44. With the middle number being the heat range 5-6-7. 6 being middle. replacement.

[JoeG]

Rob had mentioned these... web page

[Salvatore]

Are NGK that much better than the Autolites? Whats the # for the 69 Z's? Thanks, Sam

[JoeG]

Sam --Rob did performance comparison tests on the dyno and he said he saw the difference with the NGK's performance.I've got an electronic ignition so I can open the gap or file back the ground rod a bit and my unit will fire pretty hot.----- I've got no complains with AC, BUT dynos don't lie, Rob said it performed super. I did however find that the AC 44 or 45 did keep a "STREET TUNE" longer than the NGK IN MY CASE-- also AC 43 is a little too cold if your not gonna blow out the carbon now and again....----------I would guess Rob would be able to give you a number for your Z............

[Salvatore]

Thanks Joe. I am thinking about using some of my NOS AC 44's for the street. (AC's look better) I have been using Autolites with good results. Maybe the NGK's are even better??!! Need to get the right heat range for the NGK. Thanks!

[Chevy454]

Here is what NGK shows for the '69 Z28: CLICK HERE

I'm personally not up on the small block NGK plugs, but our dyno guy should be...

[Salvatore]

Thanks Rob! Sam

[Schonyenko2]

NGK

[JoeG]

Yeah they do look better--guess it's a sentimental thing........