Spark plugs for ls2, z51

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Jul 21, 2024 | 04:08 PM

candipogo

Thread Starter

Racer

Joined: Feb 2016

Posts: 306

Likes: 55

From: Hernando, ms.38632

Spark plugs for ls2, z51

For ls2 lightly modded. What number ac delco Spark plugs? And recommend gap?
thanks to all.

Jul 21, 2024 | 10:39 PM

PMPerformance

Melting Slicks

Joined: Oct 2022

Posts: 3,341

Likes: 1,935

From: Ulta Vista, AZ

Stock/stock

Jul 22, 2024 | 06:28 AM

Spaceme1117

Safety Car

Joined: May 2016

Posts: 4,676

Likes: 1,856

From: Erlanger, Kentucky

Quote:

Originally Posted by candipogo

For ls2 lightly modded. What number ac delco Spark plugs? And recommend gap?
thanks to all.

Another option is NGK 7397 TR5IX. It is the exact same as the OEM plug. Stock gap of 0.40.

Jul 22, 2024 | 04:00 PM

Dave S

Retired & lovin' it!

Joined: Mar 2005

Posts: 4,475

Likes: 549

From: Jackson NJ

Quote:

Originally Posted by candipogo

For ls2 lightly modded. What number ac delco Spark plugs? And recommend gap?
thanks to all.

Your profile is saying Callaway Supercharged but your posting says lightly modded....which is it? If it's a Callaway, best check with them for proper sparkplug. If stock, ACDelco Iridium #41-162; gap 0.040"....

Jul 22, 2024 | 09:36 PM

candipogo

Thread Starter

Racer

Joined: Feb 2016

Posts: 306

Likes: 55

From: Hernando, ms.38632

Spark plugs

Quote:

Originally Posted by Dave S

Callaway advices using stock plug and gap.
Thanks for the help.

Jul 25, 2024 | 03:40 PM

NoMerlot

Advanced

Joined: May 2024

Posts: 77

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From: Sharpsburg, GA

AC Delco 41-162. Gap is 0.04

These Guys

Jul 25, 2024 | 04:20 PM

PMPerformance

Melting Slicks

Joined: Oct 2022

Posts: 3,341

Likes: 1,935

From: Ulta Vista, AZ

Quote:

Originally Posted by candipogo

Callaway advices using stock plug and gap.
Thanks for the help.

I can’t imagine those things make any steam then?
Typically a cooler plug and tighter gap is advised and sometimes necessary with boost to avoid spark blowout or melting plugs.
I never ran baby boost though, so if they recommend that, it’s likely a baby boost setup.

Jul 25, 2024 | 04:36 PM

old motorhead

Le Mans Master

Joined: Dec 2005

Posts: 7,002

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From: Southeast TX

Quote:

Originally Posted by PMPerformance

I don't think Calloway does any ***** to the wall builds. Their stuff isn't what you want if you need big numbers to impress anyone. It holds together though. I think they warranty everything they do. So, doing anything, spark plug wise, other than what they recommend, isn't the smart play.

Change for change's sake? Nope. Change your blinker fluid to the internet approved HD stuff if you absolutely need to change something.