Which Plug for Supercharged LT-1?
Safety Car
Joined: Mar 2001
Posts: 4,383
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From: Kentucky
Re: Which Plug for Supercharged LT-1? (EricVonHa)
I expect a LOT of people will disagree with my next statement. I have found the Split Fire plugs to work well with my L98 Ati Intercooled blown L98.
I am still using the stock chip and MAF and tend to run rich. I run the car rich because rich tends to be safe. I blow motors all the time. :rolleyes: And it gets rather expensive and time consuming. :cry
I am still using the stock chip and MAF and tend to run rich. I run the car rich because rich tends to be safe. I blow motors all the time. :rolleyes: And it gets rather expensive and time consuming. :cry
Le Mans Master
Joined: Oct 1999
Posts: 9,713
Likes: 3
From: Sachse Texas
Cruise-In I Veteran
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Re: Which Plug for Supercharged LT-1? (EricVonHa)
Definately stay away from the Platinum plugs for any power added car. Personally, I use Autolites. I would recommend them or the NGK V-power plugs.
Thread Starter
Melting Slicks
Joined: Aug 2001
Posts: 2,047
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Re: Which Plug for Supercharged LT-1? (EricVonHa)
Guys, thanks for the replies on the plug deal... I shoulda worded it a little more clearly from the get go... what heat range of plug should be used. More heat, higher combustion temps... means?
Pro
Joined: Nov 1999
Posts: 623
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From: Toronto, ON, Canada
Re: Which Plug for Supercharged LT-1? (EricVonHa)
I use to run NGK Tr55 (stock heat range) and the Vette ran good.
This year I tried going to NGK TR6 (one range colder). The Vette runs good after about 1200 rpm but occasionally I can feel a slight miss at idle. Don't know if it's the plugs or something else.
I would suggest you go with NGK TR55's in copper form (not platinum). These are the stock recommended range of plugs. If you are going to run serious boost, i.e. 9 psi or more than go to one colder step.
This year I tried going to NGK TR6 (one range colder). The Vette runs good after about 1200 rpm but occasionally I can feel a slight miss at idle. Don't know if it's the plugs or something else.
I would suggest you go with NGK TR55's in copper form (not platinum). These are the stock recommended range of plugs. If you are going to run serious boost, i.e. 9 psi or more than go to one colder step.
Le Mans Master
Joined: Oct 1999
Posts: 9,713
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From: Sachse Texas
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Re: Which Plug for Supercharged LT-1? (XTwinTurbo)
Stock range in the Autolite is a #106. I use a #103 for my Nitrous setup which I would recommend similar for a blower installation. Gap them at .035.
