Spark plug suggestions

[Rich]

Well I know some of you have swapped the spark plugs in your Speeds for something different. I'm considering doing the same, mainly due to the stutter I get between 2nd and 3rd in WOT. I need some suggestions on a brand, hotter or colder spark, gap, etc. Links would be very appreciated Thanks!

[Gmoney]

<div class='quotetop'>QUOTE (Rich @ Aug 13 2008, 10:20 AM) [url=index.php?act=findpost&pid=60066]<{POST_SNAPBACK}>[/url]</div>

Well I know some of you have swapped the spark plugs in your Speeds for something different. I'm considering doing the same, mainly due to the stutter I get between 2nd and 3rd in WOT. I need some suggestions on a brand, hotter or colder spark, gap, etc. Links would be very appreciated Thanks![/b]

I asked this awhile back and hoping this time there will be some responses.......Come on all don't keep it a secret. I have read some speeds going a step colder with success, but would like to hear from others about there experiences. I will keep my eye on this.....

[firestoned]

I have had good success with the NGK one step colder plugs in my speed, part #LTR7IX-11. I also stretched the coil springs during install, and it helped for quite a while. The stuttering didnt fully go away though until I upgraded the fuel pump.

Something I came across which makes me think the stuttering issue has something to do with the intake or MAF;
last week I installed my cai again, rather than the sri, because I was getting really hot temp readings from the intake. I finished my reinstall, and the stuttering all of a sudden came back again, along with a much bigger turbo lag. Granted, I had temps about 25 degrees cooler at the intake, but it ran much worse. So, its back to sri. No stutter, no lag, faster, and hotter!!!

[Rich]

I've ordered the NGK LTR7IX-11 from http://www.clubplug.net. I'm gonna gap at .034 and do the coil spring stretch while I'm at it. Maybe with winter coming up I'll go SRI around September (if I'm still here )

[firestoned]

Be careful when you gap them, as iridiums aren't meant to be gapped. You can break the tip very easy

[Rich]

I'm aware. They're very fragile, but .044 is too far out of spec, especially for a DISI setup.

[firestoned]

<div class='quotetop'>QUOTE (Rich @ Aug 13 2008, 03:29 PM) [url=index.php?act=findpost&pid=60121]<{POST_SNAPBACK}>[/url]</div>

I'm aware. They're very fragile, but .044 is too far out of spec, especially for a DISI setup.[/b]

agreed, mine are at .034

[Rich]

I ordered one extra just in case. Not a bad price on clubplug.net.....about $3 cheaper per plug than SU.

[SpeedRacer]

Forget it Rich if your upping boost and everything else get the Denzo plugs Streetunit sells they are 2 steps colder where the NGK's are only 1. Mine should be here this week hopefully...