Spark plug issues and help on EVO 8 - evolutionm.net

Go Back   >
Log In 


Evo Engine / Turbo / Drivetrain Everything from engine management to the best clutch and flywheel.
Sponsored by
Injen Technology

Click Here

Spark plug issues and help on EVO 8

Reply
 
 
 
Thread Tools Search this Thread
Old Nov 23, 2009, 07:51 PM   #1
Evolving Member
Thread Starter
 
Emperor 4g63's Avatar
 
Join Date: Jan 2006
Location: New Jersey
Posts: 158
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 05 RR Evolution GSR

Spark plug issues and help on EVO 8

Ok, I know this may have been beaten to death. But i gotta get it right. I have meth running stock turbo evo 8 pushing around 385whp. I have been running BR8ES spark plugs. Honest have to say these spark plugs only last 1 oil change from my experience and kinda annoying. Im want to try iridium plugs.

My questions : Are iridium just as good as copper in performance but last longer?
Is NGK BPR8EIX the right step colder for my performance?
NGK or Denso?
Iridium: does it need gapping?

Or should I just stick with copper and live with it.
Offline
 
Reply With Quote
Old Nov 23, 2009, 08:32 PM   #2
Evolved Member
iTrader: (14)
 
huevosrancheros's Avatar
 
Join Date: Sep 2007
Location: The Stream Of Carol , IL
Posts: 1,093
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 03 Banana EVO VIII

Stick with the copper.
Offline
 
Reply With Quote
Old Nov 23, 2009, 08:55 PM   #3
Evolved Member
iTrader: (18)
 
Ev0ikon's Avatar
 
Join Date: Jan 2004
Location: 3rd Rock {from = sun}
Posts: 3,626
Thanked 5 Times in 5 Posts

Drives: Evo803Yello

Bpr8es
Offline
 
Reply With Quote
Old Nov 23, 2009, 09:04 PM   #4
Evolving Member
iTrader: (19)
 
ErikB's Avatar
 
Join Date: Oct 2009
Location: Albuquerque, NM
Posts: 193
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2005 AS Evolution VIII

Quote:
Originally Posted by Ev0ikon View Post
Bpr8es
What he said!
Offline
 
Reply With Quote
Old Nov 24, 2009, 12:27 AM   #5
Newbie
 
Join Date: Jul 2008
Location: Malaysia
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evo 8

but whats the correct gap for evo 8? im boostin aroud 21 psi now.
its at 28 currently, im thinkin lowerin it to 24/26.
Offline
 
Reply With Quote
Old Nov 24, 2009, 08:27 AM   #6
Evolved Member
iTrader: (11)
 
cfdfireman1's Avatar
 
Join Date: Oct 2005
Location: Chicago
Posts: 4,164
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: EVO IX

what he said

Quote:
Originally Posted by huevosrancheros View Post
Stick with the copper.
I would just close up the gap some to like .023 and make sure the grounding strap is parallel to the center electrode surface. When you bend the ground electrode over to close the gap it tends to make it an uneven surface that wears faster and opens the gap.
Offline
 
Reply With Quote
Old Nov 24, 2009, 08:47 AM   #7
Evolved Member
iTrader: (2)
 
Join Date: Mar 2004
Location: CA
Posts: 3,499
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2005 EVO VIII

Copper is fine, but there is nothing wrong with the stock Iridiums. I was using my stock plugs with 38,000 miles on them, running 30psi on stock turbo with E-85. I just recently starting to get some misfiring. I replaced the plugs with another set of stock Iridiums and all is well again...boosting 30 psi on E85.

Again, a matter of choice. Pay less for the copper, but change more often. Pay more for the Iridium, but change less often.
Offline
 
Reply With Quote
Old Nov 24, 2009, 09:13 AM   #8
Evolved Member
iTrader: (1)
 
Join Date: Nov 2004
Location: Corona, CA
Posts: 583
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 04 RS

Quote:
Originally Posted by Emperor 4g63 View Post
Are iridium just as good as copper in performance but last longer?
To the best of my knowledge; yes.

Quote:
Originally Posted by Emperor 4g63 View Post
Is NGK BPR8EIX the right step colder for my performance?
The general guideline is one step colder fo every 75-100 hp added. Go for the 9 heat range.

Quote:
Originally Posted by Emperor 4g63 View Post
NGK or Denso?
I have never had a problem with NGK's.

Quote:
Originally Posted by Emperor 4g63 View Post
Iridium: does it need gapping?
Yes, you still need to have the right gap.

Quote:
Originally Posted by Emperor 4g63 View Post
Or should I just stick with copper and live with it.
Your choice.
Offline
 
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
spark plug options? Boston_eagle Outlander Sport 6 Jul 22, 2014 07:09 AM
Best spark plug and wires for Evo 8 My03evo Evo Engine / Turbo / Drivetrain 29 May 6, 2014 07:15 AM
Spark plugs for evo 9 ? Dannievo Evo Engine / Turbo / Drivetrain 6 Feb 3, 2009 09:10 AM
03 EVO 8 spark plugs KtownEVO8 Evo Engine / Turbo / Drivetrain 15 Apr 23, 2008 08:13 PM
NGK Spark Plugs? EvilBlueEvo8 Evo Engine / Turbo / Drivetrain 9 Oct 19, 2004 06:02 AM


Tags
05, 06, 21psi, bpr8es, changing, copper, evo, evolution, gap, gapping, iridium, issues, lancer, mitsubishi, plug, plugs, spark, stock

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



All times are GMT -7. The time now is 04:47 PM.