Hey guys I bought some NGK Iridiums today Heat range 7 for my Turbo ES and was wondering how much to gap them? I was told .029 is this true? Suggestions and awnsers to my questions are greatly appreciated

 

I suggest u take them back and get some heat range 5 or 6 I have 5 in my turbo es this is essential for Tue o cars

 

Heres the stats, a 7 heat range is perfect for a turbo lancer, an evo runs a 9 heat range, and the stock NA lancer runs a 5. Id say a 7 is a good compromise for low boost. 5s and 6s will cook your gaskets. Trust me on this. And Im not too sure what the gaps are supposed to be at. I think like .040 IIRC.

 

Oops thanks lancerman dunno what I was thinking I reversed it lol my bad

 

I know, they are confusing. Its all bassackwards. Youd think the higher the number, the hotter the plug would be lol. BTW, if your running a 5, Id reccomend getting a 7 or your going to find things will get VERY hot. I just helped a friend pick out new plugs cause he was cooking the shizz out of his gaskets and they were hard as a rock when he replaced them and just cracked all apart. And things coulda been alot worse if we hadnt caught it in time.

 

lancerman beat me to it but yea im running 7 now and i have a 30 something gap 40 was stock wasnt it

 

depends how much you're boosting. If you buy oem spark plugs which is reccomended, they come pre-gapped

 

This isnt an evo. This is a lancer, and oem plugs would be a 5 heat range which is waaaay hot for a turbo BASE MODEL LANCER.

 

Ya I reversed everything I had 5 now I have 7s running 10psi currently and running exactly 30 for gap.

 

Ok sweet. Now why the .030 for gap instead of the stock .040? Whats the benefit? I cant remember the difference between less of a gap and more of a gap.

 

Well I do know a little something as far as the heat range japanese spark plugs like Ngk or denso heat range that is higher it's colder american made plugs is the higher the hotter it's weird I know. But I should gap them to a .030?

 

Ya, i had it explained to me, the smaller gap will eliminate misfiring at higher rpms under boost. .040 is stock and .030 is great for turbo.

 

Ok sweet thanks guys that's what u wanted to know merry Christmas to you guys

 

Yea when I had my plugs gapped at .040 I couldn't go over 4k without massive misfires.

 

Good to know, i learn something everyday lol.