drop997stop

Here we go again, read through many old forums but didn't really find the resolution on what new plugs peeps are using that are working.

My stock plugs held up for a bit but getting more and more cels,

Beside Renntech and weistec. Can somebody chime in and provide brand name and model numbers

B27IL

Hmmm
Any cheaper option than renntech plugs ?
I believe renntech using the NGK,
But, which type ?
Please share...

hyperion667

what?? we have spark plugs??

Faris63

I went over 3 sets of OE plugs and 1 HKS plugs

Since I went Weistec I got there spark plugs and never had issue with plugs since June 2013. The good thing about Weistec spark plugs have bigger tip so it doesn't break and hold the power this engine make

Weistec plugs are cheaper than Renntech plugs + tool LOL

I have no idea what Renntech using but Weistec use brisk spark plugs made exclusively for Weistec

B27IL

How about the brisk silver ? I saw online, "brisk silver, 1 step colder spark plugs for m157 engine"
And just for about USD 145 for 8 pcs

Btw thanks for the info that weistec are using Brisk
And why do we need the special tools to change the spark plugs on this m157 engine ?
Would you please take picture of that tools (i am a diy newbie) LOL

Heisenberg

http://mesablackworks.com/Brisk-Spark-Plugs-colder-M157

I remember reading the OEM plugs are aligned in a certain manner and not sure if that is easy to do when replacing with aftermarket ones. Whether it makes any difference I am not sure but presumably there is some reason why AMG does it.

Faris63

I'm not sure about these spark plugs. I don't have the tool

Nanook

Here are the 157 plugs from Renntech.. NGK I R SIZKBR8A 8HS

B27IL

Thank you for sharing
We can get those plugs way cheaper

Just under USD 150, for those 8 pcs ,
Instead of USD 350 (renntech price) LOL

http://www.treadstoneperformance.com...g+SIZKBR8A-8HS

Ali_E55

These are BMW plugs

I remember some members having some issues with them.

B27IL

Wow
Which one is correct ?
Why renntech use those ?
Confused

drop997stop

Did you break your hks plugs? I ended ordering these but have not received them yet. Did you notice any difference

hyperion667

I only count 8 of them

Ali_E55

M157 takes only 8 spark plugs

hyperion667

what about the three for the arch laybeator?

B27IL

Correct me if i am wrong..

I come from evo and supra world,
And i feel a little bit different here..

it is so hard, just to figure out
What spark plugs is working well with our engine
Without paying the "extra cash"
AMG is premium brand, seems that we have to pay more

people who has the knowledge (tuners) seems doesnt share for free
They tend to keep the secret, rebrand the plugs, sell it for more $

It was so easy to find the correct spark plugs for Evo, LOL
We just pay, for the plugs, thats all, no "premium tax"

B27IL

Please share how they do it ?
I never heard that plugs can be aligned, just gapped properly

shardul

iTrader: (1)

it is called indexing the spark plugs

B27IL

Aah i see
Indexing the spark plugs, its just for racer only
I am too lazy to do it, and the result is not significant
Less than 1% horsepower gain
My butt dyno, cannot feel the 1% , LOL

I never do it, even on my 1000 whp 2JZ

But i dont know, if this M157, can yield more from the right indexing
I am having no experience with this engine yet

And i ever read that tri, the MB technician ever mentioned that, the m157 doesnt need
To be indexed, only m256, with fuel stratified injection, need that

AMG E Power

best screen name on mbworld hands down I'am the danger !

Ryan1

My understanding is that you need a special tool because the stock AMG spark plug is a 14mm plug. This can easily be removed with a 12 point 14mm deep socket. The Brisk plugs (and probably the NGK's too) are 16mm so they barely fit into the block. You have to have a special thin-walled 16mm socket to get the new ones in and out.

B27IL

Thank you for sharing ryan

Nanook

Apparently can be done with appropriate standard tool..special socket not necessarily needed. Not difficult but time consuming..extension and knuckle needed also

vdubpower

not sure id want something that barely fits in the block, seems like a recipe for something not good happening

JAN8OR

Renntech uses an NGK plug and it is a 14mm, just like the stock plug.