Author Topic: Spark Plugs....Please Advise (Read 28520 times)

tazz · « **Reply #25 on:** April 17, 2012, 07:50:04 PM »

Yeah Mine.
I have the original 103's installed and gapped down to .032 and I'm fine and I have my boost dialed to about 24psi and at the moment running an E47 tune.
Since every situation is a bit different and if .030 works for you LEAVE IT just as Bob said DO NOT MESS WITH IT.
You cannot get the 103's anymore that I know of so you would need to go to a compareable NGK or Denso plug to the 103's. ITV20's for the Denso plugs would be about the same as the 103's and you would need to gap them down which is a PITA because of the thin center electrode. Takes me about 5min a plug to set them correctly since you have to make delicate adjustments to get them right.

snaponbob · « **Reply #26 on:** April 17, 2012, 08:19:15 PM »

Quote from: tazz on April 17, 2012, 05:15:34 PM

Bob
You must mean GM moved to a HOTTER plug.
The original plugs GM used were a Colder plug that caused starting and idling issues so Gm moved to the AC 108's a hotter plug because of carbon fouling issues.
If your saying that he has the hotter plug since they changed them to the AC 108's then you are correct. Ac 103's COLDER plug Ac 108's HOTTER plug.

OOPS. Yup. Been busy destroying my deck and starting to rebuild it. MASSIVE brain fade.

snaponbob · « **Reply #27 on:** April 17, 2012, 08:24:10 PM »

Quote from: tazz on April 17, 2012, 07:50:04 PM

Yeah Mine.
I have the original 103's installed and gapped down to .032 and I'm fine and I have my boost dialed to about 24psi and at the moment running an E47 tune.
Since every situation is a bit different and if .030 works for you LEAVE IT just as Bob said DO NOT MESS WITH IT.
You cannot get the 103's anymore that I know of so you would need to go to a compareable NGK or Denso plug to the 103's. ITV20's for the Denso plugs would be about the same as the 103's and you would need to gap them down which is a PITA because of the thin center electrode. Takes me about 5min a plug to set them correctly since you have to make delicate adjustments to get them right.

HEY !!!!!!!!!!!!!!! Get a bigger hammer [attach=1]

tazz · « **Reply #28 on:** April 17, 2012, 10:13:10 PM »

Damn
My Hammer would fit nicely in her Tool Shed.

snaponbob · « **Reply #29 on:** April 17, 2012, 10:57:02 PM »

Quote from: tazz on April 17, 2012, 10:13:10 PM

Damn
My Hammer would fit nicely in her Tool Shed.

Ummm ............. WAIT !!!!!!!

WHAT ?!?!?!?!?!

Sol Asylum · « **Reply #30 on:** April 18, 2012, 12:26:35 AM »

If you have to ask you'll never know!

Gentleman Jack · « **Reply #31 on:** April 18, 2012, 12:53:14 AM »

Quote from: Sol Asylum on April 18, 2012, 12:26:35 AM

If you have to ask you'll never know!

Never know what?

Critterman · « **Reply #32 on:** April 18, 2012, 07:37:22 AM »

What you asked about!

tomahmmwv · « **Reply #33 on:** April 18, 2012, 10:33:49 AM »

I don't usually need that big of a hammer to gap spark plugs.

LatinVenom · « **Reply #34 on:** April 18, 2012, 04:16:24 PM »

The plugs are actually AC 41-102 and NOT 103

tazz · « **Reply #35 on:** April 18, 2012, 05:39:48 PM »

Good CATCH I thought I types 102's but I guess I didn't.
Though I do believe some Balts had the 103's.

redlinedude · « **Reply #36 on:** April 29, 2012, 07:42:09 PM »

I noticed after a couple of weeks that the performance of my car has declined due to the nanny controls that the BSR Tune does not overcome. I returned the car back to the stock setting and then re-install the BSR tune. I have no idea why but detonation has reared its ugly head again????? So I decided today that I was going to try the NGK 6509 plug because it is a 1 step cooler plug. I checked all the auto parts stores in my area and nobody had them in stock....until I called Summit Racing !!! I purchased the plugs and (after gapping them to 0.32) installed the plugs in to my car. I drove the car with the stock settings, and then installed the BSR Tune. So far it runs great with no audible detonation!! Keepin' my fingers crossed !!

elff · « **Reply #37 on:** April 30, 2012, 12:32:53 AM »

Amazon sells the ngks as well. No one has them locally

Kelu · « **Reply #38 on:** April 30, 2012, 03:48:30 PM »

Sweet, hopes this fixes your issues.

HAMMER DOWN · « **Reply #39 on:** May 01, 2012, 10:34:37 AM »

FYI, the AC 41-102 cross reference to Autolite XP5263. The only difference is the Autolite as .6mm tip, instead of the .4mm tip on the AC. I bought them at Auto Zone.

The Autolite XP5263 is not plug & play. Gap out of the box is .048. I gap then down to .035.

Another Plug thread; http://www.kappaperformance.com/forum/index.php/topic,648.0.html

Mike

Critterman · « **Reply #40 on:** May 01, 2012, 11:49:07 AM »

Let me know how those autolites hold up for you.

HAMMER DOWN · « **Reply #41 on:** May 01, 2012, 11:57:43 AM »

Ok, I have only 10k on then know. so fare no issues.

Mike

redlinedude · « **Reply #42 on:** May 01, 2012, 07:33:08 PM »

Quote from: HAMMER DOWN on May 01, 2012, 10:34:37 AM

The Autolite XP5263 is not plug & play. Gap out of the box is .048. I gap then down to .035. Mike

The NGK 6509 plugs I installed were also at .048-.050 before I gapped them to .032.

fershy · « **Reply #43 on:** November 09, 2012, 03:12:14 PM »

Anyone have the original TSB service number or know how to track it down? Just had the Redline into the dealer because of a fouled plug situation and they are looking for $410 for switching out four plugs.
Thanks,
fertshy

DeepBlueGXP · « **Reply #44 on:** November 09, 2012, 03:17:47 PM »

Quote from: HAMMER DOWN on May 01, 2012, 10:34:37 AM

FYI, the AC 41-102 cross reference to Autolite XP5263. The only difference is the Autolite as .6mm tip, instead of the .4mm tip on the AC. I bought them at Auto Zone.

The Autolite XP5263 is not plug & play. Gap out of the box is .048. I gap then down to .035.

Another Plug thread; http://www.kappaperformance.com/forum/index.php/topic,648.0.html

Mike

Don't use autolites. Speedracer69 destroyed his motor because of sparkplugs. Yes, that is right. Autolite ceramic around the electrode came loose and collapsed on the gap, causing first fuel charge not to burn and as a second one entered the piston and did ignite, it was too large of fuel charge, the extra fuel burn expanded with such force that it bent the rod on the #1 piston which in turn cracked the block.

Ames Performance Tuning · « **Reply #45 on:** November 09, 2012, 03:35:33 PM »

I would change yourself. You should be able buy stock AC plugs at an Parts store. They are usually pregapped. Takes about 15 minutes.

elff · « **Reply #46 on:** November 09, 2012, 03:43:49 PM »

With our cars, never trust the gap is correct. Kappas are pretty finicky with too large of a gap on stock or GMPP tunes.

It takes no time to verify before installing.
AC Delco 41-108s for stock and GMPP tune should be .028.
You can get these at Napa, Pep Boys, Amazon.com etc.

Joe,
You just reminded me, I never called speed racer. Is he having to cover the cost of the repairs due to the plugs not being AC Delco?
The F-ING SUCKS!!!!!!

HAMMER DOWN · « **Reply #47 on:** November 09, 2012, 05:50:31 PM »

Quote from: DeepBlueGXP on November 09, 2012, 03:17:47 PM

Don't use autolites. Speedracer69 destroyed his motor because of sparkplugs. Yes, that is right. Autolite ceramic around the electrode came loose and collapsed on the gap, causing first fuel charge not to burn and as a second one entered the piston and did ignite, it was too large of fuel charge, the extra fuel burn expanded with such force that it bent the rod on the #1 piston which in turn cracked the block.

I have over 22k on these spark plugs (Autolite XP5263), with no issues. If I have time this weekend, I'll pull them & take a look. Thanks for the heads-up Joe

.

Mike

tazz · « **Reply #48 on:** November 09, 2012, 09:21:05 PM »

Not meaning any disrespect to the BOSS since I do not know the details but really the only two things that I can think of that could cause an issue with the ceramic on any plug is defective from the get go or Detonation caused the issue. So to say don't use Autolites may not be the correct thing to say in my opinion.
Unless going to a larger diameter center electrode caused the detonation or improper heat range of plug or too agressive of a tune I can not see any reason other than defective ceramic that would cause the issue with blowing up the engine. Ive had a plug on another vehicle of mine shatter the ceramic but it was due to the wrong heat range plug and too aggressive of a tune as far a timing. The above issue caused detonation to occur and shatter the ceramic and luckily did not hurt the valves or piston I was lucky thou.
Thoughts answers?

Sol Asylum · « **Reply #49 on:** November 09, 2012, 09:35:02 PM »

I'm kind of wondering how the fuel charge stayed in the cylinder after the first no fire. The exhaust valve should have opened and the piston moving to TDC of exhaust should have cleared most of it out. Or when the exhaust valve opened the hot exhaust gas in the manifold should have ignited it and you would have gotten and after fire. Either way something doesn't seem right.

Possible the plug wasn't the cause but rather a victim as well?

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Author Topic: Spark Plugs....Please Advise (Read 28520 times)