Need Spark Plug Reccomendation

Reply Subscribe

Thread Tools

Search this Thread

Apr 19, 2007 | 01:12 PM

1QWKT/A

Thread Starter

On The Tree

iTrader: (2)

Joined: May 2005

Posts: 174

Likes: 0

Need Spark Plug Reccomendation

I have a 383, about 11.5:1 cr with the AI 190cc Head Package and a .236 .242 116 lsa cam with all bolt ons. We've had it tuned, but not on a dyno yet, going to get an Edge racing converter. I fouled out my NGK TR55 Iridiums b/c it's running rich. Should I go up a heat range? What kind of plugs have you guys successfully ran on similar setups?

Apr 19, 2007 | 01:52 PM

rbrcka

On The Tree

Joined: Dec 2006

Posts: 140

Likes: 0

From: Iowa

I would recommend a regular copper NGK TR55 with around .045 - .050 gap. I have never been a big fan of the Iridiums since the tip is so small they tend to blow out easier. I would get the tune sorted out though instead of trying to fix it with a hotter plug. Because even if it was rich at idle or part throttle you could burn it up under wot.

Apr 19, 2007 | 06:24 PM

1QWKT/A

Thread Starter

On The Tree

iTrader: (2)

Joined: May 2005

Posts: 174

Likes: 0

Yea, I am def. going to get it retuned before I start it with the new plugs. Those just seemed to foul out easily so I thought I needed a change. Thanks for the help!