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Whats a good plug gap for a 10.7 CR 350

   
Old Aug 10, 2002 | 04:50 PM
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Low C1500's Avatar
Low C1500
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From: Red Deer, Canada
Car: 89 Shortbox
Engine: 350 Vortec
Transmission: 700r4
Whats a good plug gap for a 10.7 CR 350
I have .045 right now, but I know thats too much, would something around .030 be good?
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Old Aug 10, 2002 | 05:03 PM
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Odyssey
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From: under the hood
Hell no ! That's way too tight. It all depends on your ignition system though. With a stock system .045 is good. I'd go as much as .050 with an aftermarket box like and MSD.
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Old Aug 10, 2002 | 05:12 PM
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Low C1500
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From: Red Deer, Canada
Car: 89 Shortbox
Engine: 350 Vortec
Transmission: 700r4
I do have a stock system, but I thought you had to decrease the gap with higher compression? The stock gap for vortec heads is .045 @ 9 to 1.
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Old Aug 10, 2002 | 05:14 PM
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From: Surrey, BC
The amount of gap increase is more dependent on the ignition's output. A better coil, aftermarket box, etc. will allow you to have more gap in your plugs and make more power.
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Old Aug 10, 2002 | 05:38 PM
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Low C1500
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From: Red Deer, Canada
Car: 89 Shortbox
Engine: 350 Vortec
Transmission: 700r4
I think its time to upgrade that 12 year old coil of mine!
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Old Aug 10, 2002 | 05:39 PM
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Odyssey
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Great idea!
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Old Aug 10, 2002 | 05:47 PM
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about .42 is what I run mine at. I have tried .35 and .50 and neither seemed that great. So I figured I would try in between and .42 works great. I know .42 is a weird number, but so what. WORKS for me.
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Old Aug 10, 2002 | 06:06 PM
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Low C1500
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From: Red Deer, Canada
Car: 89 Shortbox
Engine: 350 Vortec
Transmission: 700r4
Holy ****, I just assumed that the plugs I bought were .045, but I took one out and its .065. I'm cutting it down to .040.
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