Upgrade spark plugs for tune Mercedes
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From: Alberta, Canada
'18 GLE63S AMG /'19 PORSCHE TURBO S / '09 CORVETTE ZR1 /'14 LEXUS RX350/'16 RAV4 Ltd
My first plug(s) seems to be going south so I ordered a new set today...I think I have about 30k kms..got a cel cylinder 5 misfire but seems to be running fine for the most part..for now anyways..I might pull that plug or just wait for the new set to arrive and change the works
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From: Toronto
CLS63 PP
The big thing for high boost motors is closing up the gap, or you get spark blow out. Figure on gaping between .022-.026. Anything equivalent to a NGK 7 or 8 heat range should be good. So what I can gather is we need a 12mm x 26ish mm reach resistor spark plug. should be able to find options near that without breaking the bank.
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E63
The big thing for high boost motors is closing up the gap, or you get spark blow out. Figure on gaping between .022-.026. Anything equivalent to a NGK 7 or 8 heat range should be good. So what I can gather is we need a 12mm x 26ish mm reach resistor spark plug. should be able to find options near that without breaking the bank.
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ECS Supercharged C6 Corvette& 2012 E550 Coupe
what is the gap for the stock plugs?
anyone have the part number for the stock plugs are they the same for the m278 as they are for the m157? Do i have to buy oem ones or does bosch make them for mb?
anyone have the part number for the stock plugs are they the same for the m278 as they are for the m157? Do i have to buy oem ones or does bosch make them for mb?
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From: SoCal
2016 AMG S65, AMG GL63, 2012 AMG E63 With AMS Alpha 9 Package, Renntech 200 Catted Downpipes.
I may be wrong, but all the misfires seems to come from tune AMGs. I had mine Renntech/NGK plugs installed when I first had my Renntech ECU tune.
Now with AMS Alpha 9 or the prior tune, never had a misfire.
Now with AMS Alpha 9 or the prior tune, never had a misfire.
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From: Toronto
CLS63 PP
Misfires are 100% due to spark blow out. Closing up gap on even stock plugs will help prevent that. Oem gap is typically on the wider side to ensure more complete burn and prevent fouling. As the electode errodes, the gap becomes wider and begins to blow out during high cylinder pressure transitions
As for heat range, 7 to 8 should have sufficient cooling properties to reduce plug tip heat and prevent detonation for anything under 1000whp.
From a performance perspective you want electrode material that delivers the most spark energy. Typically coppers or silver are best, but errode quickly and cold heat range copper plugs tend fout more on cold start conditions. Iridium are used due to low erosion properties but because of the thin electrode doesn't carry same spark energy.
Last thing is projected tip or not. Typically FI motors are better with non projected tips as they run cooler, but idle quality may suffer.
All this to say nobody should be spending 350 on ****ing spark plugs. Do homework and find what works
As for heat range, 7 to 8 should have sufficient cooling properties to reduce plug tip heat and prevent detonation for anything under 1000whp.
From a performance perspective you want electrode material that delivers the most spark energy. Typically coppers or silver are best, but errode quickly and cold heat range copper plugs tend fout more on cold start conditions. Iridium are used due to low erosion properties but because of the thin electrode doesn't carry same spark energy.
Last thing is projected tip or not. Typically FI motors are better with non projected tips as they run cooler, but idle quality may suffer.
All this to say nobody should be spending 350 on ****ing spark plugs. Do homework and find what works
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From: Alberta, Canada
'18 GLE63S AMG /'19 PORSCHE TURBO S / '09 CORVETTE ZR1 /'14 LEXUS RX350/'16 RAV4 Ltd
I just received this back from my contact at Renntech...interesting and unfortunate as I just purchased a new set from Ebay
"We no longer sell the plugs we strongly recommend a fresh set of OEM
(they improved on them) and if you drive hard most likely best is 20-25 k miles
(we change them on ours with OEM’s every 15 k ! DI and fuel enemy nr 1"
"We no longer sell the plugs we strongly recommend a fresh set of OEM
(they improved on them) and if you drive hard most likely best is 20-25 k miles
(we change them on ours with OEM’s every 15 k ! DI and fuel enemy nr 1"
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From: New York, NY
2019 E63 S
Originally Posted by Nanook
I just received this back from my contact at Renntech...interesting and unfortunate as I just purchased a new set from Ebay
"We no longer sell the plugs we strongly recommend a fresh set of OEM
(they improved on them) and if you drive hard most likely best is 20-25 k miles
(we change them on ours with OEM’s every 15 k ! DI and fuel enemy nr 1"
"We no longer sell the plugs we strongly recommend a fresh set of OEM
(they improved on them) and if you drive hard most likely best is 20-25 k miles
(we change them on ours with OEM’s every 15 k ! DI and fuel enemy nr 1"
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Thread Starter
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Joined: May 2014
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From: SoCal
2016 AMG S65, AMG GL63, 2012 AMG E63 With AMS Alpha 9 Package, Renntech 200 Catted Downpipes.
The question I want to ask members here is, anyone with tune E63 and upgraded plugs throw a code/misfire?
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From: Toronto
CLS63 PP
It's not about the plugs of any one kind or manufacturer, its about the right gap and spark energy to keep them from blowing out under high cylinder pressure load. All plug types erode the electrodes after time, and that gap erosion combined with reduced conductivity of the plug as carbon builds leads to blowout.
A colder heat range helps prevent pre-ignition at high engine speeds, but that is not material to the cause of these misfires. Basically colder heat ranges are cheap insurance to add another layer of protection against detonation, but colder plugs tend to foul easier and need more frequent changing. The only way to ensure the engine runs at its peak is to change plugs frequently, and ensure a tighter gap. Stockers are fine ( not sure of the cost vs say a brisk QR12LS @15 bucks a plug, but thats what I would recommend since I can't seem to find any NGK or Denso 12mm x 26 mm reach plugs cheaper than that any how.)
A colder heat range helps prevent pre-ignition at high engine speeds, but that is not material to the cause of these misfires. Basically colder heat ranges are cheap insurance to add another layer of protection against detonation, but colder plugs tend to foul easier and need more frequent changing. The only way to ensure the engine runs at its peak is to change plugs frequently, and ensure a tighter gap. Stockers are fine ( not sure of the cost vs say a brisk QR12LS @15 bucks a plug, but thats what I would recommend since I can't seem to find any NGK or Denso 12mm x 26 mm reach plugs cheaper than that any how.)
Thread Starter
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From: SoCal
2016 AMG S65, AMG GL63, 2012 AMG E63 With AMS Alpha 9 Package, Renntech 200 Catted Downpipes.
The RENNtech performance spark plug upgrade utilizes high quality NGK spark plugs in a cooler heat range than the OEM Bosch plugs. With the increased performance and boost pressure generated from performance tuning comes increased combustion temperatures. With OEM plugs, this additional cylinder pressure can cause pre-ignition and premature spark plug fouling. RENNtech performance spark plug package uses a "colder" heat range plug which allows spark plugs to fully ignite the mixture and allow the engine to maintain higher boost levels across an extended RPM range. This plug upgrade also improves idle quality and is the perfect replacement for vehicles experiencing spark plug or rough idle issues.
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From: Toronto
CLS63 PP
FWIW I found and NGK iridium option in a 7 heat range that should work:
https://www.ngk.com/product.aspx?zpid=10231
Interestingly seems to be the same plug for ford GT's and mod motor mustangs so should be other options there too
https://www.ngk.com/product.aspx?zpid=10231
Interestingly seems to be the same plug for ford GT's and mod motor mustangs so should be other options there too
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Joined: Jun 2009
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From: Chicago, IL
AMG GT S & E63 S AMG
Recently had a set of the Weistec branded Bosch silver core plugs installed in my AMS tuned car. I was also getting the Weistec valve body and TCU upgrade, so I figured I should order the spark plugs and air filter as well. My car has about 8K miles on the tune, and if the 10-15K plug change recommendation is true, I was getting pretty close to it. Cost of the plugs, air filter, labor and taxes was $750. The car idles smoothly like before.
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e63 p30 estate
that's the SECOND time on the board today where "proactively" was changed to "prophylactically". Is this some kinda weird android/iOS autocorrect issue? Cuz it's hilarious.
Sorry, no real comment on the plugs cept to say $350 on plugs is gdamn insanity.
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From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
i pulled the plug and electrode had come loose, so i bought a new plug and changed it and misfire/stumble went away and cleared code... all is good
renntech also told me to use OEM plugs and that they dont do cooler plugs anymore as they said the new oem plugs are improved over the original ones from the 12-13 build m157's
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From: Folsom, CA
2005 E55 AMG
MBWorld Fanatic!
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From: Toronto
CLS63 PP
MBWorld Fanatic!
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E63
FWIW I found and NGK iridium option in a 7 heat range that should work:
https://www.ngk.com/product.aspx?zpid=10231
Interestingly seems to be the same plug for ford GT's and mod motor mustangs so should be other options there too
https://www.ngk.com/product.aspx?zpid=10231
Interestingly seems to be the same plug for ford GT's and mod motor mustangs so should be other options there too
And being on a MB forum, you nailed it on the head by comparing it to parts in a $150+k car. You know how we love to pay the luxury tax on here
MBWorld Fanatic!
Joined: Dec 2013
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E63
FWIW I found and NGK iridium option in a 7 heat range that should work:
https://www.ngk.com/product.aspx?zpid=10231
Interestingly seems to be the same plug for ford GT's and mod motor mustangs so should be other options there too
https://www.ngk.com/product.aspx?zpid=10231
Interestingly seems to be the same plug for ford GT's and mod motor mustangs so should be other options there too
