09' Whipple - which spark plugs? - MustangForums.com



4.6L V8 Technical Discussions Any questions about engine, transmission, or gearing can be asked here!
Sponsored by:
Sponsored by:

Reply
 
 
 
Thread Tools Search this Thread
Old 06-09-2012, 10:11 AM   #1
6bangr
1st Gear Member
Thread Starter
 
6bangr's Avatar
 
Join Date: Mar 2009
Location: Alberta, Canada
Posts: 56
Default 09' Whipple - which spark plugs?

Just recieved my whipple HO kit for my 09' GT. The kit came with the M-12405-3VO (05-08) 16mm spark plugs which won't work with the 09's and up. Can I use the stock plugs or should I be getting the 12mm FRPP spark plugs (M-12405-3V12mm)?

Would anyone recommend any other brands? I've heard mixed reviews about the brisk plugs and the ngk Iridiums. Not sure which route to go and I'm having a hard time finding someone with the FRPP ones in stock locally.

Thanks again,
6bangr is offline   Reply With Quote
Old 06-09-2012, 12:09 PM   #2
hammeron
6th Gear Member
 
hammeron's Avatar
 
Join Date: May 2006
Location: Nicely done
Posts: 11,777
Default

Quote:
Originally Posted by 6bangr View Post
Can I use the stock plugs or should I be getting the 12mm FRPP spark plugs (M-12405-3V12mm)?
you do not want to use the stock plugs with the HO kit, so yes
go with the FRPP M-12405-3V12mm
hammeron is offline   Reply With Quote
Old 06-09-2012, 05:49 PM   #3
moosestang
6th Gear Member
 
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
Default

Why didn't it come with the correct plugs? You need plugs that are 1 heat range colder than stock.
moosestang is offline   Reply With Quote
Old 06-09-2012, 08:44 PM   #4
Diabolical!
5th Gear Member
 
Diabolical!'s Avatar
 
Join Date: Jul 2006
Location: New Orleans
Posts: 4,495
Default

Autolite. As Moose said, 1 heat range colder than stock.
Diabolical! is offline   Reply With Quote
Old 06-10-2012, 11:43 AM   #5
Simon1
5th Gear Member
 
Join Date: Dec 2006
Location: Redding, CA
Posts: 4,549
Default

Yeah, Autolite HTOs.
Simon1 is offline   Reply With Quote
Old 06-12-2012, 10:15 AM   #6
6bangr
1st Gear Member
Thread Starter
 
6bangr's Avatar
 
Join Date: Mar 2009
Location: Alberta, Canada
Posts: 56
Default

An oversight on my behalf - all the whipple vendors indicate that the M-12405-3VO 16mm plugs are included with the kit. I never followed up on the disclaimer "Spark Plugs M-12405-3V12MM recommended for cars equiped with 12mm spark plugs, sold separately." I'm glad I have the 12mm spark plugs but it would have been nice if frpp/whipple had a spark plug option when ordering as opposed to sending out the 16mm plugs with every 08/09 kit.
Oh well, the right plugs are on the way. I've already installed the fuel pump and would like to get going on the blower while waiting for the new spark plugs to arrive. If I loosen the stock plugs before starting on the manifold how difficult is it to change the spark plugs with the compressor already mounted? It looks like the throttle body mounting flange may get in the way.
6bangr is offline   Reply With Quote
Old 06-12-2012, 11:24 PM   #7
Diabolical!
5th Gear Member
 
Diabolical!'s Avatar
 
Join Date: Jul 2006
Location: New Orleans
Posts: 4,495
Default

It's a pain to get at the rear driver side plugs with the blower in place, but it is possible.
Diabolical! is offline   Reply With Quote
Old 06-13-2012, 06:43 AM   #8
S197GT07
5th Gear Member
 
S197GT07's Avatar
 
Join Date: Jan 2009
Location: Mass
Posts: 2,662
Default

Didnt think the autolite's came in the 12mm thread...
S197GT07 is offline   Reply With Quote
Old 06-13-2012, 02:12 PM   #9
6bangr
1st Gear Member
Thread Starter
 
6bangr's Avatar
 
Join Date: Mar 2009
Location: Alberta, Canada
Posts: 56
Default

I can confirm that you cannot get Autolites in the 12mm thread. The only ones I've seen that would fit the build are made by NGK, Brisk, and FRPP (aka NGK from what I've heard). I think I'll leave the compressor off until the plugs are in - it does look like it would be a PIA
6bangr is offline   Reply With Quote
Old 06-13-2012, 05:57 PM   #10
moosestang
6th Gear Member
 
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
Default

It's easier to remove the #8 spark plug, than it is to remove the little screw for the coil on plug, but both can be removed and installed without even taking off the intake tube. I just disconnect the vacuum lines just behind the throttle body and use a long wobble extension. A long piece of fuel line makes removing and installing plugs a snap.
moosestang is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Terminated Whipple GT battles '13 GT500 on E85 Bokeo Street/Strip 6 10-10-2015 08:28 PM
Bad cylinder? Dathan V6 (1994-2004) Mustangs 4 10-05-2015 05:52 AM
04 Mach 460 system, Installed Aftermarket HU, No Highs/Tweeters breaking Audio/Visual Electronics 5 10-02-2015 01:27 PM
Clear codes on '94 sn95 BOB ROME 5.0L (1979-1995) Mustang 2 09-28-2015 11:10 AM
Slight surge at 1500ish rpm lmurf60 4.6L (1996-2004 Modular) Mustang 1 09-24-2015 10:07 PM


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 Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 03:36 AM.