Change plug type when raise compression?
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Supreme Member
Joined: Nov 2001
Posts: 1,526
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From: Cleveland, OH
Car: '87 Camaro LT
Engine: 355 L98
Transmission: T56
Change plug type when raise compression?
On my Vette L98 I will be putting the standard thickness head gaskets instead of the thicker Corvette ones boosting the CR from 9.5 to 10:1, do I need to change the plug type (hotter or colder?) or gap I'm using too?
Supreme Member
Joined: Sep 2001
Posts: 6,111
Likes: 53
From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
No you don't need to use a different plug after changing the
cr 1/2 a ratio. If you drive your car hard or race it, you may
want to drop down a few heat ranges from stock if your
plugs appear to be overheating or you are getting mild detonation. Other wise the stock heat range plug will be still fine.
cr 1/2 a ratio. If you drive your car hard or race it, you may
want to drop down a few heat ranges from stock if your
plugs appear to be overheating or you are getting mild detonation. Other wise the stock heat range plug will be still fine.
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