SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: challenger on February 18, 2010, 06:21:06 PM

Title: spark plugs
Post by: challenger on February 18, 2010, 06:21:06 PM

what is the best spark plugs for a 460  and gap i did a search but it did not get me to far  ???  all msd  6al box

Title: Re: spark plugs
Post by: challenger on February 19, 2010, 04:56:49 PM

heads C9VE A 
 come on  :(all you ford guys

Title: Re: spark plugs
Post by: patha on February 19, 2010, 05:14:40 PM

search for a topic by me and a couple guys posted what plugs to use

Title: Re: spark plugs
Post by: Ralph Brunt on February 19, 2010, 05:33:57 PM

ar33's
autolite 45's

not sure as i dont have the same heads as you  so i went looking around and this is what i came up with.

Title: Re: spark plugs
Post by: challenger on February 19, 2010, 05:48:24 PM

Quote from: Ralph Brunt on February 19, 2010, 05:33:57 PM

ar33's
autolite 45's

not sure as i dont have the same heads as you  so i went looking around and this is what i came up with.

im sorry Ralph i dont know shit about this im just learning it  so is that one  # ar33 autolite 45,s or two #s ... my auto store sucks i tried and they say i need a vehicle year thanks for the help guys

Title: Re: spark plugs
Post by: crewchief22 on February 19, 2010, 07:25:01 PM

The AR33 is an Autolite Racing plug

The 45 is an Autolite production plug

If you can't go into your local parts store with a part number and have them pull it off the shelf, you need to go somewhere else.  :banghead:

Title: Re: spark plugs
Post by: challenger on April 25, 2010, 11:31:43 AM

 autolite  ap 45     gap is 45   

Title: Re: spark plugs
Post by: GT Jets on April 25, 2010, 12:58:31 PM

Quote from: challenger on April 25, 2010, 11:31:43 AM

autolite  ap 45     gap is 45  

Just FWIW, the gap depends on several things...

Compression ratio.

Ignition type.

Plug reach and type.

.045" would be for <10.5:1 (=/- 10%) with high voltage ignition (HEI, MSD, Or other electronically switched deal) and about .035 for a standard points deal...

The higher the C/R the less gap...

GT