Go Back  Offshoreonly.com > Technical > General Q & A
Spark Plug Preference >

Spark Plug Preference

Like Tree0Likes

Spark Plug Preference

Reply

Old 08-08-2018, 10:15 AM
  #1
Registered
Thread Starter
 
Join Date: Aug 2018
Posts: 7
Default Spark Plug Preference

Curious what heat range you all are liking on N/A BBC? I have 735HP 572's with Edelbrock 355CNC heads....NGK? Champ? Others?? Thanks, Tim
FormulaTim is offline  
Reply With Quote
Old 08-08-2018, 11:14 AM
  #2
SORE MEMBER
Platinum Member
 
Wobble's Avatar
 
Join Date: Apr 2004
Location: 2950'49.74"N 95 5'17.55"W.......TEXAS
My Boat: SeaDoo RXP & RXP-X, Stryker Equalizer 28, Eliminator Daytona Jet
Posts: 6,999
Default

Have had excellent luck with ngk v power over the last 20 years 11-1,10.5-1 and 9.5-1 compression BBC's, also run them in my supercharged seadoos and canam atv's

i run 7's mostly unless the plug reads hot or fouls

Last edited by Wobble; 08-08-2018 at 11:17 AM.
Wobble is offline  
Reply With Quote
Old 08-08-2018, 11:33 AM
  #3
Registered
Thread Starter
 
Join Date: Aug 2018
Posts: 7
Default

We ran NGK - 11 in my Blown Alky motors (very cold) so 7 must be "hot"??
FormulaTim is offline  
Reply With Quote
Old 08-08-2018, 01:05 PM
  #4
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha
My Boat: .......32............. ............Active Thunder....
Posts: 17,094
Default

An NGK 6 is equivalent to and AC 43 which is stock for Merc NA engines.
An NGK 8 is equivalent to an AC 41 which is stock on older Merc SC'd engines.
Griff is offline  
Reply With Quote

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 On
Pingbacks are On
Refbacks are On


OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser