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Old 06-09-2012, 10:11 AM   #1
6bangr

 
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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.

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Old 06-09-2012, 12:09 PM   #2
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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
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Old 06-09-2012, 05:49 PM   #3
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Why didn't it come with the correct plugs? You need plugs that are 1 heat range colder than stock.
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Old 06-09-2012, 08:44 PM   #4
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Autolite. As Moose said, 1 heat range colder than stock.
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Old 06-10-2012, 11:43 AM   #5
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Yeah, Autolite HTOs.
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Old 06-12-2012, 10:15 AM   #6
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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.
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Old 06-12-2012, 11:24 PM   #7
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It's a pain to get at the rear driver side plugs with the blower in place, but it is possible.
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Old 06-13-2012, 06:43 AM   #8
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Didnt think the autolite's came in the 12mm thread...
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Old 06-13-2012, 02:12 PM   #9
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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
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Powertrain:
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- Aeroforce Interceptor / Mechanical Boost Gauge
- Moroso Catch Can
Handling:
- GT500 LCA - Mickey Thompson Street Comps
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Old 06-13-2012, 05:57 PM   #10
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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.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

Pumpkin jacking addict
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Old 06-13-2012, 05:57 PM
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