Jump to content

Archived

This topic is now archived and is closed to further replies.

Which plugs do you run?  

371 members have voted

  1. 1. Which plugs do you run?

    • 1. AC Delco
      146
    • 2. NGK
      46
    • 3. Bosch
      22
    • 4. Autolite
      6
    • 5. Champion
      5
    • 6. Denso
      6


Recommended Posts

I changed my plugs today. Of course Advance Auto said that I couldnt put Rapid Fires in my 8.1 because their computer called for irridium plugs. The irridium plugs they wanted me to get were $15.99 per plug. I promptly told the guy to get bent and went to the Chevy dealership. There they hooked me up with AC Delco Premium Performance Platinums. They were out of Rapid fires, but my parts manager said that these were just as good. So I went home and took my oldies out(very easy on my 8.1). I noticed that there was a s**teload of white, hard carbon deposits on them. All of them. Some even looked as if the porcelin had melted a little. No biggie, put the new ones in and she pulls like a champ now. I also noticed that AC Delco were not the factory plugs. Denso is now the factory plug due to the performance of IRRIDIUM. Dang it. The dealer didnt even tell me that Denso was an option. After researching it online I find all of this. I would have surely picked Denso had this been explained to me. But oh well. Any of you have problems with carbon build up, and how do you lessen it?

 

:cheers:

Share this post


Link to post
Share on other sites

Supercop,There is not a Rapidfire plug listed for the 8100 engine,This is why nobody had them (They only list Rapidfires for the 4.3-V6)

The AC-Delco plugs you got (Which should have been GM part#12578277 or AC-Delco part#41-983) are Iridium plugs,They are the only sparkplugs GM lists in the parts catalog for the 8100 engine. :cheers:

Share this post


Link to post
Share on other sites

Yes sir, I found that out after checking here. But I was given platinum AC Delco plugs, not irridium. Will it make that much of a difference?

 

:cheers:

Share this post


Link to post
Share on other sites

No,If your using AC-Delco plugs,You'll be OK!

I'm a little confused though,Heres what it says in our GM parts catalog:

 

PART# USAGE: DESCRIPTION: YEAR USAGE:

 

12578277- CK2,3 8.1G (L18)- SPARK PLUG (AC-Delco#41-983)(IRIDIUM)- 01-06

 

 

But like you said,When I grabbed a box of them here it says right on the box "Platinum Spark Plugs"

Share this post


Link to post
Share on other sites

I had 95,000 on a '99 ecsb that when I changed the plugs. The plugs looked just like the new ones I was putting in, but they had that light tan residue on them. The electrodes were not even worn, and I drive pretty hard too, not too much pussyfootin'.

 

With lasting power like that, I'll always use Delcos on my trucks.

Share this post


Link to post
Share on other sites

O.K. I need to replace my plugs, but what do I use? Parts store has the AC Delco OE factory plug for $6 each, sparkplugs.com has Denso for $12 or NGK for $7. Is there that much of a difference in performance? Please Help!

Share this post


Link to post
Share on other sites

2002 2500hd,6.0L. i changed to the ac-delco #41-983, at .040" gap. i am seeing a 2 mpg drop in my milage. any body else? this plug is at .040" gap, when the oem plugs were at .060" gap.

thanks.

Share this post


Link to post
Share on other sites

Rebop,

what does the sticker under the hood call for plug gap? Use that. (my guess is they should be .060) Remember, you have to gap ALL plugs, especially when new.

Share this post


Link to post
Share on other sites
Rebop,

what does the sticker under the hood call for plug gap? Use that. (my guess is they should be .060) Remember, you have to gap ALL plugs, especially when new.

 

 

 

 

 

 

the sticker does say .060" gap. i have a question into ac-delco, asking why they are at a .040" gap. these are all non-gappable plugs. any iridium, or platium plugs should not be re-gapped, due to the fact that the tip might break off.

Share this post


Link to post
Share on other sites

The wider your plug gap is the leaner the fuel mixture can be. I run my Champion Double platinum plugs wider than stock for better milage. Todays ignitions will jump the gaps way beyond reason, I know I do peoples tune ups, so an extra 0.005 isn't a problem if you change plugs every 50K but it sure helps the mileage. Don't try it with a supercharger or NO2 though.

 

Vernon

Share this post


Link to post
Share on other sites
Rebop,

what does the sticker under the hood call for plug gap? Use that. (my guess is they should be .060) Remember, you have to gap ALL plugs, especially when new.

 

 

 

 

 

 

the sticker does say .060" gap. i have a question into ac-delco, asking why they are at a .040" gap. these are all non-gappable plugs. any iridium, or platium plugs should not be re-gapped, due to the fact that the tip might break off.

 

 

 

 

We must be talking different plugs. My platinums are easily gapped, you just bend the side electrode.

Share this post


Link to post
Share on other sites

Just put 8 of the Delco's on my '01 w/ 77K on it. The came gapped at .065 so I easily bent them down to .060. They are platinum, not iridium like the stockers, but were in pretty good shape. $6.46 per plug at Napa. Feels like I knocked at least .008 sec of my 0-60 time...oh yeah!

Share this post


Link to post
Share on other sites

 

 

any iridium, or platium plugs should not be re-gapped, due to the fact that the tip might break off.

 

 

 

 

 

They should be gapped, but you are right, do not use a sliding wedge gap tool to widen the gap. there is a different type of tool that will grab the tip and bend it up without touching the electrode. I got mine at AutoZone.

Share this post


Link to post
Share on other sites

Ac-delco all the way. there's a reason that they last up to 100k miles.

 

solved more troubleshooting issues by replacing wires + plugs with OEM materials than anything else.

Share this post


Link to post
Share on other sites

Supercop, how many miles on your 8.1 when you changed the plugs? Do you use any anti-sieze on the threads so they'll come out easy after the next 100K miles?

Share this post


Link to post
Share on other sites

ADSENSE FOOTER
  • Popular Now

×

Important Information

By using this site, you agree to our Terms of Use.