Member
WHICH IS THE BEST TO YOU ON THE E31 M70
*Bosch Super Plus Spark Plug - FR8LC+
*Bosch Platinum+4 Spark Plug -FGR8DQP
*Iridium OE Finewire - FR8LII33X
I HAVE THE Bosch Platinum+4 Spark Plug/FGR8DQP IN MY CAR NOW I WANT TO BUY NEW ONES AND WONDERING IF THE Iridium OE Finewire/FR8LII33X ARE THE BETTER PLUGS TO BUY THANK YOU
Member
none of the above-
plain-jane copper core plugs (LOTS of discussion on this here btw...)
Member
Bosch Super Plus Spark Plug - FR8LC+ ARE THE COPPER CORE OEM
AND THE Iridium OE Finewire - FR8LII33X HAS COPPER CORE ALSO SO WHY YOU SAY THESE ARE NOT GOOD AND WHAT ARE THE plain-jane copper core plugs
Member
F8LCR is the plug you want stick with the copper core like was mentioned prior
Member
Search is your friend, I bought the NGK 7558, lots of discussion on this topic as rockytt suggested.
Mad Scientist
upgrade your coils and you might be able to get away with using any of those, don't upgrade coils and you'll find out why everybody is telling you those are all wrong.Originally Posted by RAFFEAL
NONE of those are the same plug as the original F8LCR plugs. Resistance matters... I know, it *shouldn't* but it DOES.
MAX@FINEMOTORING.COM
And, just to beat a dead horse, neither are the NGKs 8^)
How come the middle half of any project always takes the most time?
Member
Dammit! I guess I should've searched deeper.
Member
NKG BKR6EK and/or BK6EQUP will work.
Resistance is 1k ohm.
Member
RAFFEAL , have a talk with Max Lumens about upgrading to 40k volt coils , and
maybe upgrading your ignition wires to Magnecore . Then you should be able to use platinum or iridium plugs .
Member
ngk plugs are awesome.
would run them any day over any bosch crap currently available.
Member
yep!
MAX@FINEMOTORING.COM
Great info, thanks. Been looking for 1Kohm plugs for a while. Did you test them to see if they were within spec?
Those are some funny-sounding plugs. Double and quadruple electrodes?
http://www.ngksparkplugs.com/techinf...tnumberkey.pdf
Last edited by Max Lumens; 05-06-2012 at 11:40 PM.
How come the middle half of any project always takes the most time?
Member
I have heard that these NGK plugs are recommended also by BMW to replace the old F8LCR plugs and they are also the closest matching plugs out there to replace it.
I installed NKG BKR6EK to my M70 and it runs idle smoothly and goes like a charm
Member
Anyone ever used the Autolite Copper ones from Autozone in an M73?
http://www.autozone.com/autozone/par...er=117687_0_0_
1996 BMW 850ci
2012 Duramax
1974 Camaro
Member
Just remember... that although copper core plugs fire better, give you a little smoother idle, and may give you tiny bit more umph, they will not last as long...about 15K. I'm lazy and I don't want to change plugs again so used the oem NGK BKR6BEQUP...and I'm willing to sacrafice that little missing umph.
Last edited by gsjohnson; 05-07-2012 at 06:13 PM.
Member
do not fit autolite plugs to anything, quite possibly some of the worst plugs i have used in any motor.
only fit for garbage domestics...use quality plugs in a car you care about.
Member
OK THANK ALL OF YOU FOR TO HELP OEM BOSCH F8LCR WINS, WHY CAUSE I HEAR SOME OF YOU SAY
'' NKG BKR6EK and/or BK6EQUP will work.
Resistance is 1k ohm.''
ALSO
''Just remember... that although copper core plugs fire better, give you a little smoother idle, and may give you tiny bit more umph, they will not last as long...about 15K. I'm lazy and I don't want to change plugs again so used the oem NGK BKR6BEQUP...and I'm willing to sacrafice that little missing umph.
ONE MORE THING I BUY TWO BOSCH COILS 2011 BUT I HAVE THE Bosch Platinum+4 Spark Plug -FGR8DQP IN MY CAR FROM THEN TOO THIS MEANS WHEN I BUY THE NEW PLUGS I HAVE TO GET TWO NEW COILS ALSO FOR HE SAID
''upgrade your coils and you might be able to get away with using any of those, don't upgrade coils and you'll find out why everybody is telling you those are all wrong.
NONE of those are the same plug as the original F8LCR plugs. Resistance matters... I know, it *shouldn't* but it DOES.''
Last edited by RAFFEAL; 05-07-2012 at 07:45 PM.
Member
bosch platinum +4 plugs are terrible in any car...marketing hype right there.
just fit fresh factory spec plugs or the ngk equivalent and roll with it.
Member
I guess we have to agree to disagree on this part... I use autolites in my 600hp blown camaro
1996 BMW 850ci
2012 Duramax
1974 Camaro
Member
lol, they work well in domestics...just not in imports for whatever reason.
but yes, agree to disagree
Member
I've used autolites before and they did work out in my "domestic" either. For domestics I'm a Champion man. Euro, NGK'sI guess we have to agree to disagree on this part... I use autolites in my 600hp blown camaro
Mad Scientist
OK, just so you fully understand...
Bosch F8LCR plugs were discontinued long ago, what Bosch says is a suitable replacement - is not, as many folks have found out. Some get away with using the higher resistance plugs, most do not - hence the upgraded coil comment. Upgraded coils refer to a higher output coil, NOT the OEM Bosch units... 10Kv vs 40Kv... that makes a difference.
So, if you want to run the stock ignition system with Bosch coils, great... but use some of the 1k resistance plugs mentioned above (that ARE still available) or, if by some magic you find some real F8LCR's... otherwise, with uprated coils, you can run just about anything you want (meaning, any flavor of plug in the correct range and physical dimensions).
Member
To make sure you are utterly confused, I am running Denso equivalent. I prefer them over the NGK mentioned above. I ran NGK for about 1000 miles then switch. The copper plugs are cheap enough for you to try 2 or 3 brands before making a decision...
Member
ok thanks i will sreach for those bosch ones
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