Posted By: 493RT
Plug reading ? - 09/15/14 02:01 AM
Could someone read/decifer my spark plug. Its a Autolite 3924.
Plug reading ?
Posted By: MR_P_BODY
Re: Plug reading ? - 09/15/14 03:09 AM
I can say one thing... you have too much timing
Posted By: 493RT
Re: Plug reading ? - 09/15/14 03:36 AM
Thanks Mr.P , I just switched to a bigger 950 Holley carb, had a thremoquad on it before and it pinged like crazy. I should probably put new plugs in it and it check it then. Is the autolite 3924 a good plug to run . This is on my 493 with edelbrock performer RPM heads ?.I was thinking my timing is at 37 deg. total . Also running 110 octane. Thanks for the feedback 
Posted By: MR_P_BODY
Re: Plug reading ? - 09/15/14 03:54 AM
I'm running that plug in my SB at 10.4:1
Posted By: 493RT
Re: Plug reading ? - 09/15/14 04:12 AM
Ok , thanks. I'll get some new plugs and back the timing down a couple degrees . Thanks again, I'm sure I will be back with some more questions. 
Posted By: MR_P_BODY
Re: Plug reading ? - 09/15/14 04:30 AM
It might take a run or two but look for the color to
be in the middle of the bend on the ground strap
be in the middle of the bend on the ground strap
Posted By: GTX MATT
Re: Plug reading ? - 09/15/14 04:27 PM
Heres a question, I've seen this on plugs in some engines myself and never knew what to make of it; why does it look "fuzzy?"
Posted By: MR_P_BODY
Re: Plug reading ? - 09/15/14 04:30 PM
Quote:
Heres a question, I've seen this on plugs in some engines myself and never knew what to make of it; why does it look "fuzzy?"
Most of what your seeing is the fuel additives
Posted By: GTX MATT
Re: Plug reading ? - 09/15/14 04:32 PM
Quote:Quote:
Heres a question, I've seen this on plugs in some engines myself and never knew what to make of it; why does it look "fuzzy?"
Most of what your seeing is the fuel additives
Figures
Posted By: Thumperdart
Re: Plug reading ? - 09/15/14 05:54 PM
Quote:
Thanks Mr.P , I just switched to a bigger 950 Holley carb, had a thremoquad on it before and it pinged like crazy. I should probably put new plugs in it and it check it then. Is the autolite 3924 a good plug to run . This is on my 493 with edelbrock performer RPM heads ?.I was thinking my timing is at 37 deg. total . Also running 110 octane. Thanks for the feedback
That`s a hot plug for your combo in my opinion...........it`s like a #5 in NGK and the band you see on the ground may move closer to the middle of the ground strap if you go to a # 7............That plug looks hot and nasty. Try a 7, post a pic and see what happens.
Posted By: 493RT
Re: Plug reading ? - 09/15/14 07:13 PM
Quote:Quote:Quote:
Heres a question, I've seen this on plugs in some engines myself and never knew what to make of it; why does it look "fuzzy?"
Most of what your seeing is the fuel additives
Figures
Might be a little bit of anti seize towards the end of the threads...
Posted By: 493RT
Re: Plug reading ? Updated - 09/17/14 02:17 AM
Changed to Autolite 3922 plug. I also left the timing alone. Heres a picture of the 3922 plug
