Plug gap
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Joined: Apr 2002
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From: Armpit state
Car: 71 Nova
Engine: Superramed 383, Topline heads
Transmission: 700r4
Axle/Gears: 8.2 posi 3.08
Plug gap
Im running a 383 stroker motor with tpi. What would be a good plug gap for my setup? I think stock is .35, but not sure if this would be fine.
Last edited by shaggy56; Aug 7, 2003 at 04:04 PM.
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From: CLIMAX, GA. USA
Car: 1972 LT1 Corvette
Engine: 350 HO
Transmission: M22 Heavy Duty 4 Spd
Axle/Gears: 336
Will need to know the year model of your engine and whether you have cast iron or aluminum heads. This will determine your plug gap and plug heat range. I have Platinum +4 in my Vette. No worry about gap.
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Supreme Member
Joined: Apr 2002
Posts: 1,119
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From: Armpit state
Car: 71 Nova
Engine: Superramed 383, Topline heads
Transmission: 700r4
Axle/Gears: 8.2 posi 3.08
Well the engine is a 4 bolt main from a light duty truck thats all i know. The heads are iron 76 cc with 1.92 1.5 valves
Thread Starter
Supreme Member
Joined: Apr 2002
Posts: 1,119
Likes: 1
From: Armpit state
Car: 71 Nova
Engine: Superramed 383, Topline heads
Transmission: 700r4
Axle/Gears: 8.2 posi 3.08
Well the engine is a 4 bolt main from a 1980 light duty truck thats all i know. The heads are iron 76 cc with 1.92 1.5 valves. Im running 9.5 : 1 comp if that helps. Im also running comp cams 12-268-4 cam
Last edited by shaggy56; Aug 7, 2003 at 10:43 PM.
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.035-.040" to start, check performance and increase .005-.010" until performance suffers, then put it back to the previous gap (before performance was lost) and maybe close it another .005".
Originally posted by shaggy56
Well the engine is a 4 bolt main from a 1980 light duty truck thats all i know. The heads are iron 76 cc with 1.92 1.5 valves. Im running 9.5 : 1 comp if that helps. Im also running comp cams 12-268-4 cam
Well the engine is a 4 bolt main from a 1980 light duty truck thats all i know. The heads are iron 76 cc with 1.92 1.5 valves. Im running 9.5 : 1 comp if that helps. Im also running comp cams 12-268-4 cam
Thread Starter
Supreme Member
Joined: Apr 2002
Posts: 1,119
Likes: 1
From: Armpit state
Car: 71 Nova
Engine: Superramed 383, Topline heads
Transmission: 700r4
Axle/Gears: 8.2 posi 3.08
Thanks for the info. I read the more comp and modified an engine is that you need a tighter gap.
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Originally posted by shaggy56
Thanks for the info. I read the more comp and modified an engine is that you need a tighter gap.
Thanks for the info. I read the more comp and modified an engine is that you need a tighter gap.
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Thread Starter
Supreme Member
Joined: Apr 2002
Posts: 1,119
Likes: 1
From: Armpit state
Car: 71 Nova
Engine: Superramed 383, Topline heads
Transmission: 700r4
Axle/Gears: 8.2 posi 3.08
Yeah, but 9.5:1 is the "stock" compression on a TPI engine so start at stock gap and go from there, no one can tell you the "magic" number for the gap, it is something you'll have to play with and find what works best for your combo.
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