thanks
Bosch Spark Plugs
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From: Fort Knox, KY
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I run Bosch plats (standard) in my DD, never tried them in the Vette. Never tried the Plus 4 models, either. Use the NGK TR-55 Platinum instead.
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Racer
Joined: Jul 2004
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From: San Diego CA
Originally Posted by onedef92
I run Bosch plats (standard) in my DD, never tried them in the Vette. Never tried the Plus 4 models, either. Use the NGK TR-55 Platinum instead.
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From: Phoenix AZ
In Lincoln Tech one of my instructors was a Chevy Tech, he said that a lot of cars with the +4's came in and apparently the platnum electrodes fell off, and then tumbled around inside the motor and scuffed up the bores. You couldn't pay me to run those plugs. 
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Joined: Oct 2000
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From: Fort Knox, KY
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Originally Posted by stubbs
In Lincoln Tech one of my instructors was a Chevy Tech, he said that a lot of cars with the +4's came in and apparently the platnum electrodes fell off, and then tumbled around inside the motor and scuffed up the bores. You couldn't pay me to run those plugs.
I wouldn't fool with 'em, either.
oh **** there in my car now from the previous owner. What happens if the bores get scuffed up?
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Pro
Joined: Feb 2006
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From: Concord NC
Oh ok. Guess ill take them out tomorrow. Lucky me. Its a pain to change the plugs on the drivers side even with a swivel wrench 
and im not paying some overcharging mechanic to do it. 
Thanks for the info
and im not paying some overcharging mechanic to do it. Thanks for the info
Heel & Toe
Joined: Jan 2006
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From: Miami Florida
Originally Posted by gslotman
I am with F92 on this. I tried the +4's - and mileage went down (shrouds the flame path from plug).........went with my old stand by TR-55s and mileage went right back up !
there are two diffrent tr55 one platnuim and the other is iranuim
Which would be better? Iranium sounds like it is better but not price wise.
What gaps would you recomend with both options.
I use the bosch platnuims regulars. but they are gaped to .045 instead of .035 When i used the stock gaping my gas milage went down so i gaped up till it ran better.
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From: Fort Knox, KY
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Originally Posted by C4driver99
Oh ok. Guess ill take them out tomorrow. Lucky me. Its a pain to change the plugs on the drivers side even with a swivel wrench and im not paying some overcharging mechanic to do it. Thanks for the info
and im not paying some overcharging mechanic to do it. Thanks for the info
Heel & Toe
Joined: Jan 2006
Posts: 23
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From: Miami Florida
does the year actually matter when choosing plugs? I know ingnition volts and the heads do matter.
I was looking for the TR 55 duoble plat and i was not able to find them for my application.
1989 L98 ,alum head
I did find diffrent NGK's called V-power.
Any advice on these?
http://www.modulardepot.com/product_...bd9be2de695594
I was looking for the TR 55 duoble plat and i was not able to find them for my application.
1989 L98 ,alum head
I did find diffrent NGK's called V-power.
Any advice on these?
http://www.modulardepot.com/product_...bd9be2de695594
Team Owner
Joined: Oct 2000
Posts: 96,443
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From: Fort Knox, KY
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Originally Posted by EekL98
does the year actually matter when choosing plugs? I know ingnition volts and the heads do matter.
I was looking for the TR 55 duoble plat and i was not able to find them for my application.
1989 L98 ,alum head
I did find diffrent NGK's called V-power.
Any advice on these?
http://www.modulardepot.com/product_...bd9be2de695594
I was looking for the TR 55 duoble plat and i was not able to find them for my application.
1989 L98 ,alum head
I did find diffrent NGK's called V-power.
Any advice on these?
http://www.modulardepot.com/product_...bd9be2de695594
Check your service manual, but I think the stock plug gap is .050