What spark plugs for turbo?

[Excidium28]

What spark plugs do I need to get for an E36 OBD2 M3 turbo, I believe the rule of thumb is 2 degrees colder. I called a few part stores in my area and half of them cant figure it out.

How many degrees is the stock spark plugs, and which ones would I need (model number?)

[Bav///Man]

see if this helps.

http://forums.bimmerforums.com/forum/showthread.php?t=569120

[Excidium28]

OK so 4091s are like stock but 2 steps colder? Are these bosch or what?

Or these?
NGK 4554 or R5671A-8 plugs

Did I get this right

[ParadigmGuy]

What spark plugs do I need to get for an E36 OBD2 M3 turbo, I believe the rule of thumb is 2 degrees colder. I called a few part stores in my area and half of them cant figure it out.

How many degrees is the stock spark plugs, and which ones would I need (model number?)
I run BKR7E NGK's gapped to .28". They're 1 degree colder.

[Darth Maul]

get the denso ik22, horsepower freaks has them in stock. That's where I bought mine.

[5mall5nail5]

I run BKR7E NGK's gapped to .28". They're 1 degree colder.

Same

[Excidium28]

Just talk to NGK they recommended the 2668 NGK irridium 9c found them at $9.80 a piece, Ill get a set of these and the 4554 $1.89 a piece

[Darth Maul]

is your car running yet???

[dredder]

is your car running yet???
+1

[kennejp]

look at racersmarket.net techno550s website he has plugs in different degrees I think they are NGK

[dredder]

get it locally i got -1 and -2 from mike's auto part. they have them in stock

[GodFather]

look at racersmarket.net techno550s website he has plugs in different degrees I think they are NGK
+1
thats where i bought mine from...a good rule of thumb is 1 step colder for every 100hp over stock...

[Excidium28]

YES! the car is running! took Kuni about an hour to figure it out, the crank sensor was wiered wrong. Replacing spark plugs right now.

[dredder]

YES! the car is running! took Kuni about an hour to figure it out, the crank sensor was wiered wrong. Replacing spark plugs right now.
once it said and done, we need a thread so people dont get in the same situation as you.

[Darth Maul]

crazy! I want to see that bad boy! Let's set up a meet just kick and hang out!

[Bassmaster]

I run BKR7E NGK's gapped to .28". They're 1 degree colder.

Ditto on these plugs... Can be bought at Advance auto for less than 2.00 each...I believe a set cost me 11.00+ change I have yet to have a mis fire after about 4k miles. I will never go back to high dollar irridium plugs. Plus if the electrode breaks on these you wont trash a piston. These are the plugs the supra guys run up to 30psi Mine are gapped at .025. (NGK 6097)

[dredder]

Ditto on these plugs... Can be bought at Advance auto for less than 2.00 each...I believe a set cost me 11.00+ change I have yet to have a mis fire after about 4k miles. I will never go back to high dollar irridium plugs. Plus if the electrode breaks on these you wont trash a piston. These are the plugs the supra guys run up to 30psi Mine are gapped at .025. (NGK 6097)
+1 I have them now. I havent got a misfire. since it was installed

[Robstah]

I run the NGK BKR6Es NA, and do plan on running the BKR7Es when/if I boost.

[95RogueM3]

a good rule of thumb is 1 step colder for every 100hp over stock...
What about these two guys? They are both running well in excess of 100rwhp over stock (both are atleast 200rwhp over stock)...:confused :

I run BKR7E NGK's gapped to .28". They're 1 degree colder.


Ditto on these plugs... Can be bought at Advance auto for less than 2.00 each...I believe a set cost me 11.00+ change I have yet to have a mis fire after about 4k miles. I will never go back to high dollar irridium plugs. Plus if the electrode breaks on these you wont trash a piston. These are the plugs the supra guys run up to 30psi Mine are gapped at .025. (NGK 6097)

[hotshu]

NGK' website has reccomendations for how many degrees colder than stock plug for hp enhanced cars. They say 1 heat range colder for every 75 to 100hp added (at the flywheel I assume). So basically what Godfather said above.

[95RogueM3]

NGK' website has reccomendations for how many degrees colder than stock plug for hp enhanced cars. They say 1 heat range colder for every 75 to 100hp added (at the flywheel I assume). So basically what Godfather said above.
I know that seems to be the rule of thumb, but apparently it doesnt necessarily hold true. (as both Paradigm Guy @ 616whp and Bassmaster @ 400whp+ only run -1 stage plugs from stock)

What is the downside to running plugs that are too cold for your application? (ie running 2 stages colder when you only need plugs that are one stage closer)

[hotshu]

Too cold & they will foul the plugs (electrode is covered in black), then they become harder to spark (needs more Voltage). Worst case is misfires. But in my case I havent had a problem with NGK irridium BKR8EIX, ymmv.

[95RogueM3]

look at racersmarket.net techno550s website he has plugs in different degrees I think they are NGK


+1
thats where i bought mine from...a good rule of thumb is 1 step colder for every 100hp over stock...

How are Techno's plugs, guys?
Link: http://www.racersmarket.net/catalog/product_info.php?cPath=27_28&products_id=74

Your Thoughts?

[wankelnut]

the colder the plug, the smaller the gap, guys... keep the gap around .023 or smaller, you will feel the difference.. the colder plugs prevent detonation, but also foul easier, so close the gap :)

[WCM3]

I run BKR7E NGK's gapped to .28". They're 1 degree colder.

Wait..did you guys mean .028". .28" seems like a lot..

[ParadigmGuy]

Wait..did you guys mean .028". .28" seems like a lot..
.028" :)

.28" is a lot.