Hello fellas, Need to know what kind of spark plugs to use with NOS. I've been using the Autolite 605's because they are cheap and I like to play it safe by changing them every other month.
Used them until one of them completely blew up!
I've seen on the site were alot of you guys are using NGK plugs, which ones do I get for NOS since I think I need a colder firing plug, RIGHT???????????
I've got NGK TR55 in at the moment, seems like I remember a few of you on here speak of them.
Thanks guys and keep surprising them sport cars!

 

You will want the NGK TR6. It is a colder burning plug and safe for nitrous or blown applications. Gap it between 35 and 40.

 

yup thats right.

 

What jetting are you using?

Eating a plug under nitrous use is not a good thing...how many cylinders did this effect? What did the "remaider" of the plug look like? What was missing?

I am currently on TR55's and have used TR6's. I have also run Autolite 104's during a few dyno passes. I tend to like the TR55 for drivability vs the TR6 with my current HP setting but TR6's may be more applicable in yours? I don't have enough info to say which would be true. I have been in search of a better plug than the NGKs for heavy/ier nitrous use. Something with a non-lean burn protruded electrode and a shorter wider ground strap.

Richard

 

Yea Oxidizer, scared the crap out of me on my last pass down the track. I wasn't too worried because I didn't hear any pops or bangs but the truck did start to pull to the right halfway down the track. I had a bad feeling about the way it was running so I went with some and got some NGK TR55 cause I've seen were alot of guys on here are running them. That is when I discovered the blown up plug. I feel like the Luckiest man alive right now that it wasn't much worst.
I'm running 150 shot of NOS. Which plug do you guys recommend?
Heck can't really bust on Autolites, it blew to hell but some how still made some type of spark!
The only cylinder affected as the right rear cylinder, is that number 8?
Can't wait to spray again so help me get the most reliable plug in for a 150 shot of NOS!

 

Need some suggestions on some colder firing plugs for use with NOS for my 5.3 liter.
THANX!

 

You said 150 HP but what size nitrous and fuel jets are you using (orafice size)? I can make a better suggestion based upon your jetting rather than HP approximates.

Richard

 

would the orafice size really matter? they have ls1s running tr6 plugs on everything from a 50-250+ shot.

 

My point would be why loose the NA power running a tight gapped colder than needed plug when you don't need to. TR6's have shown a notable (5-8 rwhp) loss when used in an incorrect application. The plug you use should not be colder/hotter than needed to survive the combustion chamber environment. Any less may be safer but at the sacrifice of power. Any more and you burn up parts.

I still use NGK TR55's which work OK at best but really are not that well suited to heavy nitrous use. The TR6's will show more misfires espcially when not on the nitrous...I really like the 55's over the 6's but they will not withstand .067 (150 HP) jetting or higher that well.

Richard

 

well see, if you turn your jets to 1.2psi, and run the dual calibration module to the nawwws setting, then you would have approximately a 15 shot of nawws per cylinder, therefore resulting in uneven wear on the alternator, therefore increasing combustion on the exhuast chamber which in turn would result in the formula of 1.2x15x8+alternator-exhaust chamber = lots of technical bullshit talk!!

love,
oxidizr <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />