Another spark plug thread

[Turbo Keith]

So I was in Auto Zone today and was gonna get the R42TS for my GN , running bout 25+lbs of Boost , And the Guy there ask did I want the CR or R and I ask whats the difference ? He replies the CR is made of Iridium and the R is cooper . Thoughts ?

 

[Nick Micale]

My comment is to use a NGK spark plug like the UR5/2771.

 

[Turbo Keith]

My comment is to use a NGK spark plug like the UR5/2771.

At 25 Plus lbs of Boost and at what gape ?

 

[NOKA72]

If you do get the Ac Delco. I can tell you this for some reason I foul out the plugs that are only R. CR I never had an issue.

 

[Nick Micale]

At 25 Plus lbs of Boost and at what gape ?

I would set them at .028" gap with that boost level.

 

[yuh8tng]

I’ve tried CR43 n R43 gapped @35 15lbs. didn’t notice a difference. I also tried the R42 gapped @30 n @35 with 15lbs. Didn’t notice a difference except 1 plug did foul out within less than 6 months. The only difference I noticed is in my setup the 43’s last longer and give me better gas mileage. Prolly cus I don’t past more than 16lbs. if boost

 

[grass doctor]

ngk unless you are being judged at car shows
haha

 

[Turbo Keith]

I may try the NGK sometime but I have had good luck with the AC's

 

[SS/GN]

A/C Delco is not the same as it once was. I stay away from there products. I had a fleet of trucks and used lots of there parts and after 2008 I had nothing but grief. Starter's, alternators, shocks, spark plugs, tie rods and a few other parts, nothing but warranty claims and grief.

 

[Pronto]

NGK all the way.

 

[Turbo Keith]

NGK all the way.

What gap at 25+ lbs of Boost ? 0.028" ?

 

[Pronto]

I run 24

 

[WE4REAL]

Delco R43T's work fine for me.

 

[b4black]

I don't believe CR is iridium, as AutoZone sells then for $2.59. CR vs R is the shape of the electrode.

Internet search:

AC Delco CR43TS has an extended tip and would be better for your engine in my opinion.

The differences in prefix and suffix:
C = commercial
T = tapered seat
TS = tapered seat with extended tip

 

[~JM~]

Every time there is a spark-plug or oil thread, another cute & fuzzy bunny is drowned.

 

[Turbo Keith]

I don't believe CR is iridium, as AutoZone sells then for $2.59. CR vs R is the shape of the electrode.

Internet search:

That's what the guy told me is why I posted this .

 

[Turbo Keith]

I was in AZ today and had them order me the cr42ts and the salesman said yes , they are made of Iridium . He did say that some Iridium plugs can be as much as 15 to 20 bucks .

 

[Pronto]

They are "heavy duty". The electrode is fatter I believe. BTW, never believe the salespeople at auto parts stores. Most have next to nothing for knowledge. You're better off doing your own research on the net on reliable sites.

 

[b4black]

Do you really listen to the salespeople at Autozone????

Even the Autozone website says copper:
https://www.autozone.com/external-engine/spark-plug/acdelco-spark-plug/227604_28620_0

 

[turbo nasty]

You dont want the fat ass ground strap in the CC the projected fat ass CR grade plugs promote detonation