spark plug recommendation - Team Camaro Tech
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post #1 of 4 (permalink) Old Mar 27th, 04, 09:09 AM Thread Starter
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Zach
 
Join Date: May 2003
Location: Woolwich Twp, NJ
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getting ready to change the plugs on my 350. the head casting numbers are 333882. the heads did have a port and polish job, and the engine is generously modified. unfortunately i don't have the specs on everything, friend the engine was bought from misplaced the paperwork. i do know the compression is around 10:1 to 10.5:1. honestly, i don't remember which plugs i installed a couple years ago, i just know they were autolites. i've never had a problem with autolites or champion plugs. possibly thinking about bosch platinums? any recommendations on the part numbers?

69 Camaro - LeMans blue w/ black vinyl top - 350/TH350
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post #2 of 4 (permalink) Old Mar 27th, 04, 01:07 PM Thread Starter
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Zach
 
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Location: Woolwich Twp, NJ
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ok, so i did a little research and i decided i want the AC Delco R43T or the equivalent of that plug. anyone know the cross reference of that number for NGK? and just to make sure, R44T to R43T would only mean a change of one heat range colder right?

[ 03-27-2004, 03:28 PM: Message edited by: 69nj350 ]

69 Camaro - LeMans blue w/ black vinyl top - 350/TH350
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post #3 of 4 (permalink) Old Mar 27th, 04, 06:03 PM
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Determine what reach you need. Reach is usually standard to the 1/8". Also determine the thread size. Most are 14mm. Then go to Champion spark plug's website and look through their listings. If you're running stock, then a stock heat range plug should work fine. Do you need a short insulator to clear headers? 5/8" hex is nice because it is a bit smaller and easier to get a tool on.

Dave
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68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #4 of 4 (permalink) Old Mar 27th, 04, 07:09 PM Thread Starter
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Zach
 
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Location: Woolwich Twp, NJ
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i don't know exactly how to find out what reach i need, but the R44T is the stock plug for my engine. NGK has some pretty good info on their site, i believe the heat range info says the rule of thumb is generally one range colder per 75-100hp over stock. i've definitely covered that. so i figured i would be safe with a plug one heat range colder than stock. maybe i should pull a plug and get a reading? a shorter plug would be nice too. the autolites in there now barely clear on a couple of the header tubes, but they do clear enough to not cause problems.

69 Camaro - LeMans blue w/ black vinyl top - 350/TH350
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