Keying your spark plugs - Mustang Evolution

Go Back   Mustang Evolution > Ford Mustang | Wrenching, Care and General Topics > Mustang DIY and Technical



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 09-03-2015, 12:14 PM   #1
Registered Member
Regular
 
Diehard's Avatar
 
Join Date: Mar 2014
Location: North Reading
Region: Massachusetts
Posts: 2,112
Keying your spark plugs

Ever hear of this?
Keying your spark plugs.docx
__________________
____________________________________________________
14 V6 auto, MCA, PP, BBK Shorties, MMD Hood Struts, Borla Touring A/B's, MAC ProChamber, aFe drop-in Filter
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lets not forget, an opinion is a judgment, viewpoint, or statement about matters commonly considered to be subjective.
Diehard is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-03-2015, 12:24 PM   #2
Registered Member
Regular
 
fenixignition's Avatar
 
Join Date: Nov 2014
Location: Clearwater, fl
Region: Florida
Posts: 1,050
sounds like someones "theory" that doesnt make any difference in combustion. I'd be pretty surprised if it makes any difference.
__________________
2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
fenixignition is offline   Reply With Quote
Old 09-03-2015, 12:30 PM   #3
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 7,419
"Keying" or "Indexing" spark plugs has been around for almost as long as spark plugs!
"Side gapping" is another method of unshrouding the spark to the AF mixture without going through the trouble of having to index each spark plug to every cylinder.
http://m.instructables.com/id/Save-G...ide-Gapping-S/

Sent from my SAMSUNG-SGH-I747 using Mustang Evolution mobile app
straybullitt is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-03-2015, 12:37 PM   #4
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 7,419
Quote:
Originally Posted by fenixignition View Post
sounds like someones "theory" that doesnt make any difference in combustion. I'd be pretty surprised if it makes any difference.
There can be small gains if this is done correctly. It does, of course, depend on the combustion chamber design, as to how much of a small gain that you will see.
straybullitt is offline   Reply With Quote
Old 09-03-2015, 04:25 PM   #5
Registered Member
Regular
 
Join Date: Feb 2014
Location: salem
Region: Wisconsin
Posts: 384
Mainly used in drag racing where you hunt for even the most infinitesimal gain in HP. On the street you'll NEVER notice any difference.
bodon is offline   Reply With Quote
Old 09-03-2015, 04:41 PM   #6
Registered Member
Regular
 
fenixignition's Avatar
 
Join Date: Nov 2014
Location: Clearwater, fl
Region: Florida
Posts: 1,050
Quote:
Originally Posted by bodon View Post
Mainly used in drag racing where you hunt for even the most infinitesimal gain in HP. On the street you'll NEVER notice any difference.
Makes sense. Kinda what I meant to say. I just didn't know if it was actually used in racing even.

Sent from my SM-G920V using Mustang Evolution mobile app
__________________
2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
fenixignition is offline   Reply With Quote
Old 09-04-2015, 03:46 PM   #7
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,712
I've been indexing plugs since before a lot of you were born.
Most race plugs are side gap and to get it right you usually use crush sleeves made of copper to index and get direct the flame throw right.
When we broke my 408 in on the engine dyno we used a set of break-in plugs and then put a fresh set of plugs in....gained 2HP at maximum torque...I always used to index plugs on the racecar....and carried 5/6 sets of different heat ranges whenever I went racing...............as someone said I doubt you would ever know the difference on the street plug you need to know where to point the electrode.
olerodder is offline   Reply With Quote
Old 09-10-2015, 08:55 AM   #8
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: JB MDL
Region: New Jersey
Posts: 16,612
Not sure if I should feel old because ppl have never heard of this. This is something my father taught me about that he did in the 60s all the time lol.
__________________
2000 Mustang GT Steeda #0048

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 09-10-2015, 10:29 AM   #9
Registered Member

Regular
 
olerodder's Avatar
 
Join Date: Oct 2014
Location: Corvallis
Region: Oregon
Posts: 2,712
The word "Keying" kind of threw me at first..........no one I ever new called indexing plugs keying plugs.............kind of like indexing a crankshaft....I can't imagine someone saying I just keyed my crank. Of course I'm 70 years young and only racing for 50....so maybe it was before my time.
olerodder is offline   Reply With Quote
Old 10-27-2015, 04:55 PM   #10
Registered Member
Regular
 
thelastsumurai's Avatar
 
Join Date: Oct 2011
Region: Florida
Posts: 374
I posted the art of indexing on allford... Couple years ago. It wasn't received very well, those kids had no clue. I been wondering for years if it would be more effective because of the four valves... I had a 69 Nova 396 I used to run... That's when I thought 10's were fast.
Don't look for it all my
__________________
'16 Eco-Boost Premium, White, Performance Pkg, 6R80 (again), Pwr Ebony Lthr with Nether Region Cooling, Adaptive Cruise Control, Enhanced Security Pkg., Reverse Park Assist., Big Worm OTT Graphix.

2014 GT Premium 200A, Black on black , leather , 6R80, Nav, Security. Pro Cal, HT catback exhaust 12.54@112
thelastsumurai is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > Ford Mustang | Wrenching, Care and General Topics > Mustang DIY and Technical

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Have You Personally Ever Changed Your Spark Plugs On Your 07? SCCofSV General Mustang Discussion 3 11-13-2012 11:45 PM
No spark in the spark plugs 94GTpony 1979-1995 Mustang GT 7 10-30-2012 02:20 PM
Careless People–Keying, Opening their Door, etc into the Stang tgmeyer The Bar 50 09-17-2012 02:30 PM
E3 Spark Plugs Diamond Fire - Spark Plug gonzo56 2005-2010 V6 Mustang 6 09-28-2011 10:45 AM
Problem with gt40p spark plugs want some good spark plugs but most wont fit?? Justbust1n 1979-1995 Mustang GT 6 03-01-2011 04:20 PM

» Like Us On Facebook



05:13 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.