Back to Back Comparison: NGKs vs ZR1 Plugs

[AngelSpeedFreak]

Do these ZR1 plugs come pre-gapped?

[2SS45th]

They were a little tight, I gapped them to .040, but most of them were very close to that.

[dan0617]

Originally Posted by JANNETTYRACING

The only way to tell is READ YOUR PLUGS and Adjust your tune up accordingly.

Ted.

Yeah, that's what I'm doing. NGKBR7's misfired at cruise. Brisk 12's (8 heat range) are too cold. No signs of heat and are not staying clean. I think I'll go with the Denso IT22's, then if they are too cold by readings Ill try the ZR1's. hate to buy so many plugs but I'd rather sneak up from it on the cold side than go too hot and detonate.

[H-E]

Originally Posted by dan0617

Yeah, that's what I'm doing. NGKBR7's misfired at cruise. Brisk 12's (8 heat range) are too cold. No signs of heat and are not staying clean. I think I'll go with the Denso IT22's, then if they are too cold by readings Ill try the ZR1's. hate to buy so many plugs but I'd rather sneak up from it on the cold side than go too hot and detonate.

Smart move,the denzos will work great

[Supercharged SS]

Originally Posted by 2SS45th

They were a little tight, I gapped them to .040, but most of them were very close to that.

To big of a gap with a blower and nitrous. We tightened up the gap after Ted learned some stuff on the dyno.

[2SS45th]

Yeah well I'm off the bottle right now... Just graduated to a sippy cup

[dan0617]

Originally Posted by Supercharged SS

To big of a gap with a blower and nitrous. We tightened up the gap after Ted learned some stuff on the dyno.

What gap are you running? Im guessing around .032. I know the sbc engines on the spray liked no more than .028 but then that gets harder to light off the mix at light throttle cruise.

[Supercharged SS]

Originally Posted by dan0617

What gap are you running? Im guessing around .032. I know the sbc engines on the spray liked no more than .028 but then others harder to light off the mix at light throttle cruise.

.032.

[ryan's camaro]

NGKs and Densos are best suited for Japanese makes, since they are Japanese spark plug brands.

[Ryne @ CMS]

Originally Posted by ryan's camaro

NGKs and Densos are best suited for Japanese makes, since they are Japanese spark plug brands.

Good logic..... Even though zr1 plugs are made by denso.....

[2SS45th]

That's like saying snap on tools won't work on Toyota

[Blk-Ice]

interesting read!

[2SS45th]

Also, I'm about 100 miles from updating the info with the ZR1 plugs. I'll try to get out and drive it if the weather shapes up a bit.

[ryan's camaro]

Not necessarily. Tools don't go into the functioning or operation of the mechanism itself. It is as the name implies, a tool used to achieve a greater goal (assembling parts together. You don't use a hand wrench in place of a piston, now do you?).

I watched EricTheCarGuy on YouTube and his explanation of spark plugs. Subaru (a Japanese make) will not run with non-Japanese spark plugs, like Autolite. Therefore, it only makes sense (generally) that the location of make of the engine and spark plugs match for best performance.

Originally Posted by 2SS45th

That's like saying snap on tools won't work on Toyota