LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Nitrous plugs

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Old Jun 20, 2005 | 01:08 PM
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Default Nitrous plugs

what's everybody with LT1's running for spark plugs with spray?

Thanks
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Old Jun 20, 2005 | 02:17 PM
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i have ngk-tr6
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Old Jun 20, 2005 | 08:36 PM
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you can run autolite 104's also
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Old Jun 20, 2005 | 09:07 PM
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I have used both auto lite 104 and NGK TR6.
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Old Jun 21, 2005 | 08:30 AM
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autolite 104 or ngk tr6-- used both but prefer ngks
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Old Jun 21, 2005 | 12:43 PM
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I ran TR6s with my blower and was very happy with them.
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Old Jun 21, 2005 | 12:50 PM
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i might add that i have 12.5-1 compression as well and drive on the street with the tr6 plugs, nitrous is assisted with race fuel though
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Old Jun 21, 2005 | 12:53 PM
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I ran NGK TR6's in my '94 but rarely sprayed. The few times I did they worked great. I have TR55's in there now as I want to sell the motor and will not spray it again.
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Old Jun 21, 2005 | 09:05 PM
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autolite 104's great plug and cheap..... especially when you have to change them every other bottle!!!!!
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Old Jun 21, 2005 | 10:25 PM
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I would have thought the 103s are better for Nitrous. The 104 IIRC is more or less for the stock heat range? But maybe that's on a b-body only.
Matt
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Old Jun 21, 2005 | 10:28 PM
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on an f body lt1 the 104 is 2 stages colder than stock

i believe
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Old Jun 22, 2005 | 09:59 AM
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hands down the best plug for an lt1 with nitrous is an AC delco R42LTS....tr6's foul out too easy
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Old Jun 22, 2005 | 11:03 AM
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ACD R42LTS...cheap and can get them anywhere
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Old Jun 22, 2005 | 12:34 PM
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what heat range are the r42lts is it the same heat range as the 104'
im lookin for a different plug i dont spray but i run a colder plug cause i have around 11.3:1 cr i may change to 105 or something im not sure yet just lookin at some options and i like the delco plugs
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Old Jun 23, 2005 | 12:46 AM
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Id say since youre running that much compression too that you should get two steps colder which would be a tr7(ngk) or a autolite 103.. Ive run both and found that the ngks foul easier but thats just me
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Old Jun 23, 2005 | 08:49 AM
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I run 11.5-1 comp and a 200 shot on top of it and run the r42lts plugs. They do not foul and work well on the bottle.
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Old Jun 23, 2005 | 09:31 PM
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Originally Posted by monster7
on an f body lt1 the 104 is 2 stages colder than stock

i believe
I'm pretty sure the 104 is one step colder than stock. 106's are stock heat range.
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