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Discussion Starter #1
So this is one of the plugs that was in my motor for the last few months. Its an Autolite 104 gapped to .060. I drive a 2.3 and was swapping them out for the 103's as they are a colder plug which supposedly the 2.3 needs over the 2.0.

So anyway it looks a bit hot to me don't you think? I don't get any engine noises or anything from idle to WOT and no lost power so I am not trying to correct any problems. Just curious as to how each would perform from a hotter to a colder plug in the 2.3 to see if we ST and 03-04 PZEV owners should be using a colder plug especially when modification is involved.

Mods to the motor are as follows.

-Steeda SRI
-F2 Header (wrapped)
-Trubendz 2.5" Exhaust (no cat)
-Tuned by Focussport for 91 Octane
-BSD

So what do you all think. Here are three pics.







Also going to go to the dyno probably this weekend to determine what the A/F is and see if it needs any correcting so we'll see. Also to see what numbers I am putting down. lol
 

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Gal. 2:20
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hay Justin lemme know when your going I need to go again some time to prolly next weekend. pm me before you go dude. And what is WOT?
 

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Discussion Starter #3
Yeah I am probably going to go this Saturday. It would be awesome to go with ya. Not sure what time though. Probably earlier rather than later. WOT is Wide Open Throttle.
 

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Gal. 2:20
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oh copy that WOT, just member to pm me some time this week. And those mite be a bit to hot but hard to tell from the pics.
 

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Discussion Starter #5
Yeah camera on the phone is convenient but not the best. lol. Intrax right? How much did it cost you the first time?
 

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Looks like its running a little rich, but its hard to tell by the pics. You need to lighten up the picks some.
 

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You cant take a plug that has been run/driven around on and tell what your AF and timing

To check a plug you need to install a new set let it warm to engine temp then go and do a long WOT run somewhere and lift then shut the engine off coasting in , then take it out and check the plug but there is NO WAY to check it with out it in your hands , there is no way a picture will show you what you need to be looking at

When you go to the dyno check your AF when it is right play with the timing 1 to 2 Deg and see what works safest

Tom
 

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Gal. 2:20
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Yeah camera on the phone is convenient but not the best. lol. Intrax right? How much did it cost you the first time?
no I wene to INTEC in kent it was 45 bucks for dyno and an extra 15 to do AFR so out the door like 62 buck for 2 runs but well worth it IMO
 

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Discussion Starter #9
Will do Tom. Although this was to determine a hot or cold running plug and not necessarily the A/F ratio but I suppose the two are somewhat connected anyways.

And Guy I will give you a call later tonight when I know more about my schedule this weekend. Maybe I can follow you down there since you know where it is and we can do some runs together. Would be fun.
 

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Force-Powered Focus
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lookin forward to seein ur numbers justin!
 

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Gal. 2:20
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huh? 155-160.....[pray]..Tom better work some magic on my next tune if were wanna get there.

<-----and ya, thats vanilla ice..pssh..155-160
 

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Gal. 2:20
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dud the guy at the dyno shop was nuts on w/ mine he said 137 flat....and as you can see from the dyno...well enough said. I told him what my mods were and all too. Ill say 158 WHP.
 

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ive also noticed that 2005 ST say to use 103 plugs, but the 2006-up say to use the 104 plugs. anyone notice that?
 

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Force-Powered Focus
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could be the different factory tunes you know? justin, what do you have, ihet, right? no cams yet? yeah, you should be around 156 and 152.
 

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Force-Powered Focus
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oh, and i meant those number as hp and tq, respectively.
 
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