C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Plug gapping??????

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Old Apr 16, 2002 | 01:41 AM
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Default Plug gapping??????

My plugs are gapped to about .045, what should they be at, and how do I get them gapped right?
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Old Apr 16, 2002 | 02:22 AM
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Default Re: Plug gapping?????? (BAdAzZV8)

I run my cut-back AC Delcos at .048".
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Old Apr 16, 2002 | 08:46 AM
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Default Re: Plug gapping?????? (65Z01)

any mods that might have changed your gap requirements? or is that for a out of the box type 350? In rereading your signature, I am guessing its not stock...


[Modified by MinnesotaRagtop, 6:47 AM 4/16/2002]
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Old Apr 16, 2002 | 08:53 AM
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Default Re: Plug gapping?????? (MinnesotaRagtop)

The HyperTech coil puts out 53kV compared to 38kV from the stock unit. Combined with the lower resistance TPIS wires, this allows me to run with a .045"-.048" gap.

With a stock ignition I suggest the stock gap, i believe .035". I would still run with cut-back ground electrodes for a more efficient burn though.
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Old Apr 16, 2002 | 01:21 PM
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Default Re: Plug gapping?????? (BAdAzZV8)

What is the stock plug gap for a 92 LT1? I thought it was .050.
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Old Apr 16, 2002 | 02:04 PM
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Default Re: Plug gapping?????? (emoshn)

LT-1 stock plug gap is .050

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Old Apr 16, 2002 | 03:04 PM
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Default Re: Plug gapping?????? (Springer's 95)

Stock is .050 on the LT1. I run .035 on my bosch plugs and my car seems to really like it there!

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Old Apr 16, 2002 | 03:04 PM
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The plugs on my L98 are at 0.035 right now.
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Old Apr 16, 2002 | 04:40 PM
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Default Re: (scorp508)

I gap mine at .035 for the Nitrous. LT1 stock gapping is .050 as stated above.
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Old Apr 16, 2002 | 07:26 PM
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Default Re: (Vette92)

But if I cut the electrodes it would be even a bigger gap, like going from a .045 to .060

What exactly do you guys do exactly to the plugs?
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Old Apr 16, 2002 | 07:31 PM
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Default Re: (BAdAzZV8)

All you do is bend the tip. Get a plug gap tool, usually just a round disk with an inclined edge. Check the gap with the tool, use the tool to open the gap by prying up on it.

I hope that is what you are asking.
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Old Apr 16, 2002 | 07:37 PM
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Default Re: (Vette92)

Yeah, that is what I was asking. I wasn't sure if I could bend the tip or not, and I have the gap tool.

Thanks,
Anthony
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Old Apr 16, 2002 | 07:38 PM
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Default Re: (BAdAzZV8)

OK, so now I'm looking at getting a good gap. Some are saying .035, but you say that you did that for your nitrous setup, would it be good to do that if not running nitrous?
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Old Apr 16, 2002 | 07:53 PM
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Default Re: (BAdAzZV8)

Again this maybe something you fine tune for your car but .035 is where mine runs best, judging by mph.
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Old Apr 17, 2002 | 11:45 AM
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Default Re: (BAdAzZV8)

I would set it to stock plug gap of .050" for a N/A setup.
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