LS1TECH - Camaro and Firebird Forum Discussion

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Shorty spark plugs

Thread Tools
 
Search this Thread
 
Old Feb 21, 2026 | 10:29 AM
Share
  #1  
Bob70's Avatar
Bob70
Thread Starter
Teching In
 
Joined: Feb 2023
Posts: 13
Likes: 3
Default Shorty spark plugs
I have rams horn exhaust on an otherwise stock 1995 LT1 350. Can anyone recommend a shorty spark plug for this engine so I can get more clearance for spark plug boot? The commonly recommended Accel shorty plugs have a shorter reach as well as shorter length from seat to top terminal than the stock plugs. Does that make a difference?
Reply
0
Old Feb 22, 2026 | 12:17 PM
Share
  #2  
leadfoot4's Avatar
leadfoot4
TECH Veteran
20 Year Member
iTrader: (1)
 
Joined: Sep 2005
Posts: 4,621
Likes: 11
From: Webster, NY
Default
When you say, "ram's horn manifolds", do you mean C-2/C-3 Corvette style manifolds, or stock 4th generation Camaro/Firebird manifolds?
Reply
0
Old Feb 22, 2026 | 12:32 PM
Share
  #3  
Bob70's Avatar
Bob70
Thread Starter
Teching In
 
Joined: Feb 2023
Posts: 13
Likes: 3
Default
I meant an aftermarket version similar to the older Corvette manifolds.
Reply
0
Old Feb 22, 2026 | 12:40 PM
Share
  #4  
Bob70's Avatar
Bob70
Thread Starter
Teching In
 
Joined: Feb 2023
Posts: 13
Likes: 3
Default
In reading my original post again, perhaps I wasn't clear about my concern. I'm wondering if the shorter reach of the plugs into the combustion chamber is a problem (18 mm stock vs 12 mm shorty).
Reply
0
Old Feb 22, 2026 | 03:17 PM
Share
  #5  
wannafbody's Avatar
wannafbody
TECH Senior Member
20 Year Member
Community Builder
Liked
Loved
iTrader: (3)
 
Joined: Apr 2006
Posts: 5,603
Likes: 1,149
From: Pittsburgh
Default
I think the short plugs are short on the plug wire side. How far they stick into the head should be the same depth as stock.
Reply
0
Old Feb 22, 2026 | 03:42 PM
Share
  #6  
Bob70's Avatar
Bob70
Thread Starter
Teching In
 
Joined: Feb 2023
Posts: 13
Likes: 3
Default
The only short plug I could find with reach inside the combustion chamber same as stock was an Accel plug that sells for around $35 EACH. Way out of my budget. Others with a shorter reach are more reasonable in cost. That's why I was asking if the reach makes a difference, which I assume would be the case, but I thought someone might have actual experience with it.
Reply
0
Old Feb 22, 2026 | 03:59 PM
Share
  #7  
Doug G's Avatar
Doug G
10 Second Club
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
Default
Reach ? as in threads or projected Vs non-projected tips ? I was running BR7 non-projected tip for some planed use of a little spray, which I never did.....yet.

Last edited by Doug G; Feb 22, 2026 at 04:11 PM.
Reply
0

Trending Topics

Old Feb 22, 2026 | 04:32 PM
Share
  #8  
Bob70's Avatar
Bob70
Thread Starter
Teching In
 
Joined: Feb 2023
Posts: 13
Likes: 3
Default
The following is copied from NGK's website: "A spark plugs reach is calculated by the length of the threads. It is measured from the seat of the plug to the end of the threads; it does not include the electrodes, or an extended metal shell. When custom-selecting a spark plug, the electrode length and projection should be included in the calculation when taking into consideration the clearance in the combustion chamber."

This what I'm asking about.
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Feb 22, 2026 | 04:40 PM
Share
  #9  
Kevin Blown 95 TA's Avatar
Kevin Blown 95 TA
On The Tree
20 Year Member
 
Joined: Mar 2006
Posts: 123
Likes: 10
Default
No you shouldn't do that. You need the same length threads as the stock plugs.
Reply
0
Old Feb 22, 2026 | 05:12 PM
Share
  #10  
wannafbody's Avatar
wannafbody
TECH Senior Member
20 Year Member
Community Builder
Liked
Loved
iTrader: (3)
 
Joined: Apr 2006
Posts: 5,603
Likes: 1,149
From: Pittsburgh
Default
I looked at Jegs and the Accel short plugs come in sets of 4 or 8 for between $38-$53 depending on what plug you need.
Reply
0
Old Feb 22, 2026 | 05:46 PM
Share
  #11  
Bob70's Avatar
Bob70
Thread Starter
Teching In
 
Joined: Feb 2023
Posts: 13
Likes: 3
Default
Thanks to all for responding. I think I'll have to find another solution besides the short plugs. There's always a way. May go with ceramic boot wires.
Reply
1
Old Feb 23, 2026 | 03:53 PM
Share
  #12  
Doug G's Avatar
Doug G
10 Second Club
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
Default
Originally Posted by Bob70
Thanks to all for responding. I think I'll have to find another solution besides the short plugs. There's always a way. May go with ceramic boot wires.
I'm using these, but there may be other/better out there ?

Design Engineering DEI 10552 DEI Protect-A-Boots | Summit Racing
Reply
0
Old Feb 23, 2026 | 03:59 PM
Share
  #13  
Bob70's Avatar
Bob70
Thread Starter
Teching In
 
Joined: Feb 2023
Posts: 13
Likes: 3
Default
How close are those boots to the exhaust, Doug? Touching? I assume you're happy with them.
Reply
0
Old Feb 23, 2026 | 05:37 PM
Share
  #14  
wannafbody's Avatar
wannafbody
TECH Senior Member
20 Year Member
Community Builder
Liked
Loved
iTrader: (3)
 
Joined: Apr 2006
Posts: 5,603
Likes: 1,149
From: Pittsburgh
Default
I've used those boots and they work fine. Last I checked there were no burn marks on my wires.
Reply
0
Old Feb 23, 2026 | 05:47 PM
Share
  #15  
Doug G's Avatar
Doug G
10 Second Club
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2010
Posts: 4,465
Likes: 192
From: Harford Co. Maryland
Default
Originally Posted by Bob70
How close are those boots to the exhaust, Doug? Touching? I assume you're happy with them.
While I do have headers, and they're ceramic coated (DynaTech), it was only extra precaution. The boot covers do touch on a few, and look fine.
Reply
0
Back to Subforum
LT1-LT4 Modifications
View Next Unread
Transmission Coolers?




Advanced Search

All times are GMT -5. The time now is 02:57 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE