LT4...best plugs to use
Thread Starter
Instructor
Joined: Jul 2002
Posts: 104
Likes: 0
From: Somerset NJ
LT4...best plugs to use
sorry, im sure this has been asked a million times before, but i want to replace mine pronto...
i have bosch platinums in there now..they were alright..any other suggestions? thanks
[Modified by AVTekk, 4:40 PM 7/29/2002]
[Modified by AVTekk, 6:09 PM 7/29/2002]
i have bosch platinums in there now..they were alright..any other suggestions? thanks
[Modified by AVTekk, 4:40 PM 7/29/2002]
[Modified by AVTekk, 6:09 PM 7/29/2002]
Safety Car
Joined: Jun 1999
Posts: 3,570
Likes: 3
From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Re: LT4...best plugs to use (AVTekk)
Just a warning about the Bosch +4s.
My son put them in his 1993 Probe and the engine missed and would not rev over 4000 rpm. Ended up putting in the stock $2 plugs. A mechanic said do not use the +4s in the Probes as the engines don't run right with them.
I know a Probe is not a Corvette, but do your homework on whatever plugs you decide to buy.
In my LT4, I put in the stock AC Delco with the platium tip plugs. Some people say the platium tips fall off, but they seem to run fine in my engine. I don't see any reason to experiment with different spark plugs.
[Modified by Mez, 10:17 AM 7/31/2002]
My son put them in his 1993 Probe and the engine missed and would not rev over 4000 rpm. Ended up putting in the stock $2 plugs. A mechanic said do not use the +4s in the Probes as the engines don't run right with them.
I know a Probe is not a Corvette, but do your homework on whatever plugs you decide to buy.
In my LT4, I put in the stock AC Delco with the platium tip plugs. Some people say the platium tips fall off, but they seem to run fine in my engine. I don't see any reason to experiment with different spark plugs.
[Modified by Mez, 10:17 AM 7/31/2002]
Thread Starter
Instructor
Joined: Jul 2002
Posts: 104
Likes: 0
From: Somerset NJ
Re: LT4...best plugs to use (Mez)
no no, didnt say +4s, just bosch platinum..i know better than to use those +4 pieces of garbage..i dont even know what engines they do run in, cuz everyone i talked to say they suck...
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
Re: LT4...best plugs to use (AVTekk)
Sorry I don't have the part number. Mine is an L98 which I'm pretty sure takes different plugs then yours. I know NGK is carried by NAPA, so you might be able to call them and get the number.
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Safety Car
Joined: Feb 2000
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From: VA
Cruise-In II Veteran
Re: LT4...best plugs to use (AVTekk)
I'd run the stock plugs again. MY plugs were fine at 75 miles tips fully intact. Replaced it with stock. Had no problem running 12.9 ET @109mph. :D
:yesnod: 
Melting Slicks
Joined: Apr 2002
Posts: 3,019
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From: down that one road next to that big tree
Re: LT4...best plugs to use (AVTekk)
the bosch plugs are fine & hold up great to resisting fouling. any plug misfires if you drop it on concrete, honestly this is the first i've heard of the +4 misfiring. there's really not a whole lot of ways to make a spark plug guys, the good ones all run pretty similar.
