Forced Induction Superchargers | Turbochargers | Intercoolers

spark plug gap?????????????

Thread Tools
 
Search this Thread
 
Old Jun 17, 2014 | 08:46 PM
  #1  
SPOOLED UP's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Nov 2011
Posts: 275
Likes: 1
From: STL
Default spark plug gap?????????????

lq4 stock long block with tu1 cam and springs
80mm turbo 80lb inj on e85
th400 3.27 gear

what should i gap at and wanting to push 18-22lbs

.025"??
Reply
Old Jun 17, 2014 | 09:14 PM
  #2  
denmah's Avatar
Moderator
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (2)
 
Joined: Aug 2008
Posts: 5,339
Likes: 31
Default

yeah strait to 24 youll be mint
Reply
Old Jun 17, 2014 | 09:14 PM
  #3  
denmah's Avatar
Moderator
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (2)
 
Joined: Aug 2008
Posts: 5,339
Likes: 31
Default

tr6 or br7ef is close to that gap right out of the box lol
Reply
Old Jun 17, 2014 | 09:26 PM
  #4  
SPOOLED UP's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Nov 2011
Posts: 275
Likes: 1
From: STL
Default

Originally Posted by denmah
yeah strait to 24 youll be mint
Is this sarcasm as in blow it up real quick???

Originally Posted by denmah
tr6 or br7ef is close to that gap right out of the box lol
I have the br7ef already and dont want to guess gap.
Reply
Old Jun 17, 2014 | 10:17 PM
  #5  
denmah's Avatar
Moderator
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (2)
 
Joined: Aug 2008
Posts: 5,339
Likes: 31
Default

i always gap right to 24, lots of people want to **** around and do like 38,32,28 etc

if you are gunna run 20lbs save yourself the hassle, gap right to 22-24 and be done

all of my 20-22lb setups run a TR6 at 23~ gap problem free
Reply
Old Jun 17, 2014 | 10:21 PM
  #6  
willizm's Avatar
9 Second Club
iTrader: (10)
 
Joined: Apr 2009
Posts: 1,230
Likes: 3
From: Joliet,IL and Las Vegas 50/50
Default

.025 gap here. No issues at 20+psi on e85. I run b8efs plugs.
Reply
Old Jun 18, 2014 | 02:49 AM
  #7  
Boosted Firehawk's Avatar
TECH Enthusiast
10 Year Member
iTrader: (11)
 
Joined: Apr 2012
Posts: 536
Likes: 0
Default

Originally Posted by willizm
.025 gap here. No issues at 20+psi on e85. I run b8efs plugs.
Hey Will why not br7ef ?
Reply
Old Jun 18, 2014 | 05:33 AM
  #8  
Camaro9969's Avatar
8 Second Club
iTrader: (12)
 
Joined: Feb 2011
Posts: 2,025
Likes: 4
From: Granby, Mass
Default

Just get br7s take them out of the box and throw them in no need to touch the gap have ran 22psi with no problems
Reply
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 Jun 18, 2014 | 07:28 AM
  #9  
willizm's Avatar
9 Second Club
iTrader: (10)
 
Joined: Apr 2009
Posts: 1,230
Likes: 3
From: Joliet,IL and Las Vegas 50/50
Default

Originally Posted by Boosted Firehawk
Hey Will why not br7ef ?
Just wanted to try a colder plug out as my br7efs were breaking up at higher boost. The gap was .028 and after switching and tightening the gap I've had 0 issues.
Reply
Old Jun 18, 2014 | 01:36 PM
  #10  
SPOOLED UP's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Nov 2011
Posts: 275
Likes: 1
From: STL
Default

GOtcha Will.... But do you think if you kept the 7s and tightened up the gap you could possibly have 0 issues?
Reply
Old Jun 18, 2014 | 03:04 PM
  #11  
willizm's Avatar
9 Second Club
iTrader: (10)
 
Joined: Apr 2009
Posts: 1,230
Likes: 3
From: Joliet,IL and Las Vegas 50/50
Default

Originally Posted by SPOOLED UP
GOtcha Will.... But do you think if you kept the 7s and tightened up the gap you could possibly have 0 issues?
Probably wouldn't have a problem with 7's gapped to .023-.024. Changing my plugs with stainless works headers is a PITA so I just went a step colder with a .025. Every cars a little different but you'll find a gap and plug that works. Most seem to have great luck with the 7's in that gap range though so it's a good place to start.

BTW, just saw you are running 80lb injectors. You may need to look at bigger injectors if you're pushing 20+ psi on e85. FWIW I'm running 2000cc injectors and my DC on 22psi is around 71-72% IIRC. You could probably get away with 1300cc or 1600cc injectors and still have some overhead.
Reply
Old Jun 19, 2014 | 02:08 PM
  #12  
Boosted Firehawk's Avatar
TECH Enthusiast
10 Year Member
iTrader: (11)
 
Joined: Apr 2012
Posts: 536
Likes: 0
Default

Originally Posted by willizm
Probably wouldn't have a problem with 7's gapped to .023-.024. Changing my plugs with stainless works headers is a PITA so I just went a step colder with a .025. Every cars a little different but you'll find a gap and plug that works. Most seem to have great luck with the 7's in that gap range though so it's a good place to start.

BTW, just saw you are running 80lb injectors. You may need to look at bigger injectors if you're pushing 20+ psi on e85. FWIW I'm running 2000cc injectors and my DC on 22psi is around 71-72% IIRC. You could probably get away with 1300cc or 1600cc injectors and still have some overhead.
Y not just bump up the line psi instead of running huge injectors?
Twin pumps at say 70psi with 80s
Reply




All times are GMT -5. The time now is 06:44 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