thanks
Bosch Spark Plugs
Team Owner
Joined: Oct 2000
Posts: 96,443
Likes: 9
From: Fort Knox, KY
Cruise-In IV Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
Cruise-In VIII Veteran
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.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years
Joe Kucinski
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!
Michael S. Palmer
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
Racer
Joined: Jul 2004
Posts: 285
Likes: 0
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.
Safety Car
Joined: Oct 2002
Posts: 3,991
Likes: 0
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. 
Team Owner
Joined: Oct 2000
Posts: 96,443
Likes: 9
From: Fort Knox, KY
Cruise-In IV Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
Cruise-In VIII Veteran
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?
Thread Starter
Pro
Joined: Feb 2006
Posts: 688
Likes: 0
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
Posts: 23
Likes: 0
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.
Team Owner
Joined: Oct 2000
Posts: 96,443
Likes: 9
From: Fort Knox, KY
Cruise-In IV Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
Cruise-In VIII Veteran
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
Likes: 0
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
Likes: 9
From: Fort Knox, KY
Cruise-In IV Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
Cruise-In VIII Veteran
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