Spark Plug Recommendations: Please
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,884
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Spark Plug Recommendations: Please
1987/L98/HEI/TPI: have new MSD 8.5 wires, new cap, rotor, but looking for best suggestions for 'Spark Plugs': I was told AC Rapid Fire 5's: but like to hear from the forum on their suggestions... thanks vinnie
Race Director
Joined: May 2001
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Re: Spark Plug Recommendations: Please (vinnies87)
Stay away from Bosch +4's and Delco Platinum plugs. Non platinum delco plugs are alright, but the platinum ones have pucks that like to fall off inside your engine!
I run a normal non platinum AC Delco plug, R44LTS. That's on my LT1 though, might not be the same plug for your L98
I run a normal non platinum AC Delco plug, R44LTS. That's on my LT1 though, might not be the same plug for your L98
Le Mans Master
Joined: Feb 2002
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Re: Spark Plug Recommendations: Please (Nathan Plemons)
Rapidfire's are platinum but don't have pucks. Rapidfire's are great performance plugs for Vettes. I like them better than the more expensive iridium plugs. Proper plug and gap in an AC Rapidfire for an 87 Vette is Rapidfire #5 gapped @ .045. Standard AC plug for 87 Vette is AC 41-629 gapped @ .035. Platinum plug for 87 is AC 41-800 gapped @ .035-- the AC 41-800 has the pucks to which Nathan referrs.
The Rapidfire's have a lower firing voltage requirement (advanced engineering) hence the larger gap recommended by AC Delco. Lower firing voltage = a good thing. i.e. similar benefit to installing a hotter coil...
Forum member submitted review of AC Rapidfire's here:
https://www.corvetteforum.com/review...=461&TopicID=2
[Modified by Lone Ranger, 7:47 AM 9/17/2003]
The Rapidfire's have a lower firing voltage requirement (advanced engineering) hence the larger gap recommended by AC Delco. Lower firing voltage = a good thing. i.e. similar benefit to installing a hotter coil...
Forum member submitted review of AC Rapidfire's here:
https://www.corvetteforum.com/review...=461&TopicID=2
[Modified by Lone Ranger, 7:47 AM 9/17/2003]
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Re: Spark Plug Recommendations: Please (Lone Ranger)
I'm running the AutoLite Platinums with no problems to date. :thumbs:
Burning Brakes
Joined: Apr 2003
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From: Wake Forest, NC
St. Jude Donor '05
Re: Spark Plug Recommendations: Please (onedef92)
Your running Autolite plugs in a Chevy engine? :nono: :jester
Actually, Autolite makes a nice plug. I've had better luck with them then Delco's... But thats just my opinion
Actually, Autolite makes a nice plug. I've had better luck with them then Delco's... But thats just my opinion
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,884
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Re: Spark Plug Recommendations: Please (Lone Ranger)
Which heads: doing some research.. came up Alum or Iron (for 87 TPI/L98): How do you tell,, is there a code and where would i find it... thanks
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From: Fort Knox, KY
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Re: Spark Plug Recommendations: Please (Saisling)
Your running Autolite plugs in a Chevy engine? :nono: :jester
Actually, Autolite makes a nice plug. I've had better luck with them then Delco's... But thats just my opinion
Actually, Autolite makes a nice plug. I've had better luck with them then Delco's... But thats just my opinion
Le Mans Master
Joined: Aug 2000
Posts: 6,227
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From: Corona CA
Re: Spark Plug Recommendations: Please (vinnies87)
Which heads: doing some research.. came up Alum or Iron (for 87 TPI/L98): How do you tell,
Le Mans Master
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Re: Spark Plug Recommendations: Please (rcolling)
Which heads: doing some research.. came up Alum or Iron (for 87 TPI/L98): How do you tell,
Easiest way to tell is if you have the center bolt valve covers you have aluminum heads. If your bolts are on the perimeter you have cast iron heads.
Easiest way to tell is if you have the center bolt valve covers you have aluminum heads. If your bolts are on the perimeter you have cast iron heads.
