What affect will run one step colder plug have
Thread Starter
On The Tree
Joined: Jan 2004
Posts: 120
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What affect will running a one step colder plug have What affect will running a plug one step colder on my 01 Z28 have? Currently I have 60,000 mile on it and I'm getting ready to change the plugs. The engine is essential stock (MTI airlid with k&N, 160 thermo) but the gears have been changed to 4.11 and the suspesnion has been redone with spohn parts. I was looking at the Irdium IT20 because I believe that is one step colder than the IT16 stock heat range. Currently like all LS1 I do have a slight ping under hard accelration that nothing seems to get rid of. I thought the colder plugs might help a little with that. What are your thoughts? Thanks in advance for your help.
Last edited by AZ28DRIVER1; Jan 13, 2004 at 01:53 PM.
If anything, one step colder will help you. I am running a "colder" plug in mine, and it does just fine N/A without the worry of pinging. Stock heat range for an LS1 is an NGK TR-55, I am running TR-6's with no ill effects gapped @ .045.
Josh
Josh
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
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From: Troy, AL
They won't hurt you. I've been running TR-6s NA for years with no problems. I like that they push the ragged edge of detonation up a smidge. That way I can run a little leaner (and leaner is meaner!) with a little more timing advance. 
