What are some good colder plugs for me to use in my s/c build. I know OTTP sells some but if I can pick them up t an auto part store and sve shipping I'd rather do that. Any help?

 

Ngk 6509

 

U can also use LNF spark plugs

 

NGK 6509 or 3672. The 6509 is an iridium plug that some people say aren't good for boosted applications. The 3672 is copper/nickel plug that seems to be recommended more for boost. The 6509 is an exact fit and the 3672 has a slightly different reach but works fine.

 

I have 6509 and they seem fine...i need to check them soon

 

I know that if I had run a 2.9 pulley I would have definitely had to make sure that I dropped down a plug heat range. However, Im now going to be running a 3.1 pulley. So do I absolutely have to have the NGK LTR6IX-11 plugs? Autozone will sell them but they are special order. The heat range on them is a 6.

I would assume that the LSJ and L61 have the same plug threads right? Can I just use a plug from the LSJ? I am asking because I found another NGK plug (NGK GP Platinum BKREGP) which also has a heat range of 6 (stock L61 is heat range 5) but is in stock at AZ. Couldnt I just run those? Im sure platinum will wear out faster than iridium plugs, and probably about the same as a copper plug. But I would much rather prefer going with a plug that isnt specialty order every time I need new plugs. I'd rather have something that I can just go down to the part store, tell them the number, and they go pull them off the shelves and bring them to me.

So can I run other plugs or am I stuck with specialty order plugs?

 

LSJ plugs are the same thread but a different reach. People have used them they just aren't what is made to fit our motors.

 

Well yeah, they are almost 1/4" shorter in reach then our stock plugs. What kind of problem would that be using a shorter reach plug?

 

No one has really had issues with them that I know of, but I suppose since they are shorter, you could have issues with not getting proper ignition.

 

Going a step colder isnt going to hurt. Try a different parts store. 6509s arent special order.

 

I gad NGK-BKR7E's, they 1 step colder and are copper don't last as long as the irdiums but are more conducive! which means better performance, I had them on my 07 lsj w/htvs1320

 

Well I finally found 6509s at O'Reillys. They don't stock them but they can get them in within a couple hours. So I just went with those cause they have the proper thread reach and seat type.

 

Correct me if I am wrong but isn't the seat taper different too?

 

from Maven, he who knows all...LSJ Plugs DO NOT WORK in a 2.2/2.4/LNF and the reverse is serious engine damage.
2005-10 2.2/2.4 Stock : ILTR5B11, ILTR5C11, ILTR5E11 All of these plugs are virtually identical and interchangeable, its impossible to tell them apart visually except by part number, the "E" plug is most likely only available as an ACDelco unit from the dealer (LTR5IX-11 is a slightly less expensive but still Iridium stock plug)

One step colder: ILTR6B11 same plug as stock listings, just one step colder, this is the stock plug for almost every 2007-8 GM product with the 3.6 V6, as well as 2007 Ions with 2.2/2.4( a slightly less expensive but still iriduium one step colder plug is the LTR6IX-11)
Two steps colderThe only acceptable NGK iridium in two steps colder is the LTR7IX-11

LNF stock: ILTR5D (same as 2.2/2.4 plug but pregapped at .035" instead of .043") ac delco 41-102 (12590701) superseded to 41-108
LNF 1step colder: ILTR6A-8G This is an expensive plug, but its the only acceptable NGK iridium plug that comes gapped in the proper range for the LNF. In a pinch you could use the same ILTR6B11 or LTR6IX-11 as the 2.2/2.4, but just know that youll have to gap them....something not desirable to do on an expensive IR plug
LNF 2 steps colder: LTR7IX-11 The only 2 step colder NGK IR plug, as above youll need to reduce the gap. Unless youre making stupid power though a #6 at .031" will probably be fine anyway

 

I'm not positive but I think you are right.

 

What could I use if I have a stock LSJ? Other than stock plugs

 

I use the BKR7EIX @.036... but |I am not stock. For stock, you should use the BKR6E it is freely available and not a lot of money. GM spent a lot of time working out the spark plug thing and the stock plugs are pretty darn good.

Maven says

LSJ Stock: IFR6D10 (Iridium upgrade, I like IR plugs ) Stock Platinum PFR6H10/PFR6T-10G (again almost identical afaik, its jus that one is also an ACDelco plug) Cheapy plugs would be the BKR6E, this should be avaialble everywhere as about 19456million different cars from Audi to Aveo to BMW to VW to Aston Martin use these but they come gapped to .031" which is too small for stock.(though they are conventional plugs so gapping isnt an issue)

LSJ 1 step colder: PFR7H-10(platinum, gapped to stock spec of .040")
BKR7EIX-11 is iridium gapped to .043"
BKR7EIX is iridium gapped to .031"
BKR7E(THE LSJ plug it seems, its just a plain old chapy Vpower gapped to .035" again pretty universal)

LSJ 2 step colder: BKR8EIX (Iridium gapped to .031")

 

Thank you so much! I've been trying to find what plugs to use but I keep reading bad things about plugs I like
Would a stock balt have problems if using step cold plugs?

 

no need to use 1 step colder in a stock LSJ; stock NGK plug is brilliant.

 

Stock LSJ plugs are fine in a stock motor. Yall dont really have to go colder unless yall drop down to like a 2.8 or less pulley. Then usually its advised to go a step colder.