Is it worth getting one step colder plugs with stock engine?
10-14-2010, 03:08 AM
#1
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Is it worth getting one step colder plugs with stock engine?
Can I run the NGK LFR7AIX 2309 with no mods. If not which plugs should I be using on stock engine?
10-14-2010, 06:57 AM
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10-14-2010, 11:02 PM
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10-14-2010, 11:58 PM
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Sorry for the silly question, but I do not know the answer. Why would you want to run colder spark plugs when you increase the hp of your engine? I always hear to do that but what are the benefits of a colder plug?
10-15-2010, 05:11 AM
#7
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Colder plugs prevent any hot spots on the plug preveneting detonation. May not be happening but its a decent precaution.
That said the Sparkplug heat is dissapated into the head more easily with a cold plug - so you will have a cooler plug but a hotter head (albeit marginally) and with no pointed hot spots.
That said the Sparkplug heat is dissapated into the head more easily with a cold plug - so you will have a cooler plug but a hotter head (albeit marginally) and with no pointed hot spots.
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10-15-2010, 12:35 PM
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Whatever we're tuning!
Colder plugs prevent any hot spots on the plug preveneting detonation. May not be happening but its a decent precaution.
That said the Sparkplug heat is dissapated into the head more easily with a cold plug - so you will have a cooler plug but a hotter head (albeit marginally) and with no pointed hot spots.
That said the Sparkplug heat is dissapated into the head more easily with a cold plug - so you will have a cooler plug but a hotter head (albeit marginally) and with no pointed hot spots.
A colder plug can reduce EGT's by 100+ degrees too which is the primary reason for using them!
I am a big fan of Denso Iridiums. Which brand are you thinking of ordering Jack?
10-15-2010, 12:44 PM
#9
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2004 MERCEDES-BENZ E55 AMG 5.5L (V8) PK16R11 Double Platinum
2004 MERCEDES-BENZ E55 AMG 5.5L (V8) PK16TT Platinum TT
2004 MERCEDES-BENZ E55 AMG 5.5L (V8) SK16R11 Iridium Long Life
I was thinking about the NGK LFR7AIX Iridium IX
10-15-2010, 05:52 PM
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Whatever we're tuning!
Look at Denso IK22 or IKH22 for a plug comparable to the NGK with a heat range of 7 which will be 2 steps colder than stock.
IK20 or IKH20 are just 1 step colder plugs than stock.
For reference only:
~75-100chp 1 step colder
~125-150+chp 2 steps colder
10-15-2010, 07:24 PM
#11
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A comparable plug for the NGK #7 heat range is a #22 in Denso.
Look at Denso IK22 or IKH22 for a plug comparable to the NGK with a heat range of 7 which will be 2 steps colder than stock.
IK20 or IKH20 are just 1 step colder plugs than stock.
For reference only:
~75-100chp 1 step colder
~125-150+chp 2 steps colder
Look at Denso IK22 or IKH22 for a plug comparable to the NGK with a heat range of 7 which will be 2 steps colder than stock.
IK20 or IKH20 are just 1 step colder plugs than stock.
For reference only:
~75-100chp 1 step colder
~125-150+chp 2 steps colder
10-15-2010, 07:53 PM
#12
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Whatever we're tuning!
Hammer asked about a colder plug and he referenced the NGK plug with a heat range of 7 and I referenced what Denso recommends compared to other manufacturers heat indexes.
I would try a Denso 20 which is considered a comparable plug to what NGK offers in a 6 heat index.
The amount of misinformation on spark plugs is
. I try and reference multiple sources before deciding on what should be considered reliable information/recommendations.
10-16-2010, 12:08 AM
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10-16-2010, 12:14 AM
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