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Hi All, just wanted to share, tuned on 2+ always running race fuel + meth (420 rwkws) and have been running OEM and NGK iridium plugs prior, have found both to be good prior to trying these HKS plugs.
Got the heads up from BlackBoost after buying some of their gear.
WOW, these HKS plugs kick ***!
Way smoother and butt dyno ^. Went 1 step cooler also. Yes they are X2 the price of the NGK's.
Specs - 50003-M45HL HKS M-Series Super Fire Racing Spark Plug - HL Type Heat range 9.
Have only done a few hundred 100's, hope they feel the same for all for their life.
If you are like me and wanting all you can get from the M177 give them a go.
Enjoy !
Hi All, just wanted to share, tuned on 2+ always running race fuel + meth (420 rwkws) and have been running OEM and NGK iridium plugs prior, have found both to be good prior to trying these HKS plugs.
Got the heads up from BlackBoost after buying some of their gear.
WOW, these HKS plugs kick ***!
Way smoother and butt dyno ^. Went 1 step cooler also. Yes they are X2 the price of the NGK's.
Specs - 50003-M45HL HKS M-Series Super Fire Racing Spark Plug - HL Type Heat range 9.
Have only done a few hundred 100's, hope they feel the same for all for their life.
If you are like me and wanting all you can get from the M177 give them a go.
Enjoy !
was wondering if there is any issue using the HKS as they have a 5K Ohm resistor value as opposed to the NGK's 1K Ohm value... any thoughts on this or if Blackboost are aware and can advise if this is okay?
My tuner just sent me these same plugs , looking forward to installing them . Current plugs feel a bit shot , im running stage 2 with a little burbles .
No thought's on the ohm's.
BlackBoost said they have been using them for a few years and after testing gave the best results. Install on every M177/78 from stage 2 up.
Most of the high powered Nissan GTR's (RB26's) also run these plugs. Same spec as ours.
My tuner said if going bigger turbos would also recommend new coils if a high km car. Spark is a issue when chasing over 400+ rwks. Need fresh coils and plugs.
My feelings are the power bump down low in the rpm is the greatest. The car feels so much more responsive. Butt dyno would say around 10% more and the rest of the rev range about 5%.
There is a youtube vid of a guy with a older Amg on the dyno, car made 372hp with the HKS plugs and less 8hp on OEM. You would think on our platform would be more due to higher hp.
Also motor feels SO smooth. It just wants to rev quicker and a heap easier.
Have to do some logs on the JB4 and review, will post my findings.
Lets us know your thoughts Alec63 after they go in.. and just remember to reduce the plug's gap.
No thought's on the ohm's.
BlackBoost said they have been using them for a few years and after testing gave the best results. Install on every M177/78 from stage 2 up.
Most of the high powered Nissan GTR's (RB26's) also run these plugs. Same spec as ours.
My tuner said if going bigger turbos would also recommend new coils if a high km car. Spark is a issue when chasing over 400+ rwks. Need fresh coils and plugs.
My feelings are the power bump down low in the rpm is the greatest. The car feels so much more responsive. Butt dyno would say around 10% more and the rest of the rev range about 5%.
There is a youtube vid of a guy with a older Amg on the dyno, car made 372hp with the HKS plugs and less 8hp on OEM. You would think on our platform would be more due to higher hp.
Also motor feels SO smooth. It just wants to rev quicker and a heap easier.
Have to do some logs on the JB4 and review, will post my findings.
Lets us know your thoughts Alec63 after they go in.. and just remember to reduce the plug's gap.
can the HKS step colder plugs be ran on a stock c63s? what is the HKS part number for stock heat range plugs, and would it be the same gap for either one?
Was at the super autobacs store in Tokyo a few years ago and there was a Russian guy that literally cleared the shelf of hks spark plugs, must of had atleast 40 of them his shopping basket
Must be pretty good plugs for tuned cars I guess.
Was at the super autobacs store in Tokyo a few years ago and there was a Russian guy that literally cleared the shelf of hks spark plugs, must of had atleast 40 of them his shopping basket
Must be pretty good plugs for tuned cars I guess.
No HKS coils, only HKS plugs with part # above. Let your figures do the walking, I'm in Australia.... so got off local supplier that got them from HKS Japan.
Our coils are made by NGK as OEM, no aftermarket coils as yet. Best supplier is NGK USA, buy direct.
Just a heads up for anyone thinking on buying these and expecting them to be a straight swap.
Our stock plugs use copper washers which allows for indexing of the plugs to the DI injector, the HKS plugs do not. I went through and marked all my stock plugs and checked the indexing , when torqued they all lined up almost exactly. I then marked up the HKS plugs and did the same thing , they where all over the show. It’s going to take a bit of work to get them to index correctly but I wanted everyone to be aware of this if they are thinking of purchasing the plugs.
Excuse my dumb questions. I decided to replace these hks sparks with new ignition coils. I would need only 4 of these ignition coils and not 8 coils, correct? For spark plugs index is that something I need to let the mechanic know?
correct you only need 4 coils.
yes a decent mechanic should be able to index the new plugs with “ spark plug indexing washers” these are copper washers of different thicknesses to make sure the plug has the correct orientation when torqued to 23NM
[QUOTE=koifysh;8378174]Excuse my dumb questions. I decided to replace these hks sparks with new ignition coils. I would need only 4 of these ignition coils and not 8 coils, correct? For spark plugs index is that something I need to let the mechanic know?
Could everyone support me please?
I also bought the HKS spark plugs and I noticed that they are shorter than the original ones for the M177. These are the HKS 50003-M45-HL
The plug size is the same, it's just that the factory plug is more of an extended tip design, which is relative. The HKS is a colder heat range. It has less center electrode protruding from the ceramic insulation and less total protrusion from the plug body which keeps the electrode cooler and wicks heat away to the plug body faster.
The plug size is the same, it's just that the factory plug is more of an extended tip design, which is relative. The HKS is a colder heat range. It has less center electrode protruding from the ceramic insulation and less total protrusion from the plug body which keeps the electrode cooler and wicks heat away to the plug body faster.
Thank you so much for the explanation. Then I can screw them in without worry?
Thank you so much for the explanation. Then I can screw them in without worry?
You're welcome. Many are using these plugs without issue. That being said, if you're not subjecting the engine to higher operational loads due to a tune or upgraded turbos, you may not have any benefit in running these plugs. A range colder that what the engine load necessitates can be problematic as the plug will run cooler and could result in the plug suffering from carbon buildup an ultimately fouling.
You're welcome. Many are using these plugs without issue. That being said, if you're not subjecting the engine to higher operational loads due to a tune or upgraded turbos, you may not have any benefit in running these plugs. A range colder that what the engine load necessitates can be problematic as the plug will run cooler and could result in the plug suffering from carbon buildup an ultimately fouling.
In fact I have a Stage 2 Tune on it with the BlackBoost intake, would it make sense to run a colder one then?
In fact I have a Stage 2 Tune on it with the BlackBoost intake, would it make sense to run a colder one then?
It sounds like the HKS plugs, which are one heat range cooler than stock will work fine. I'm running them with an ECU tune and intake without issue. They might provide some level of detonation mitigation at higher boost levels, so I consider them a safety precaution.
I am running the HKS 50003-M45HL with PTG-1000, gapped to 0.026". Solved misfire issues I was having at WOT immediately after the 3-4 shift . At the time, I also replaced the coil on the cylinder that was misfiring.
I've noticed that there is ANOTHER revision of coil packs (PN# ending in 0202 to 0206) since I replaced the coil last year.
I am about to replace all HKS plugs with fresh ones (~10k miles on HKS plugs) and I think I'll get the latest version of coils to ensure I don't have any detonation issues or bogging down.
Just a heads up for anyone thinking on buying these and expecting them to be a straight swap.
Our stock plugs use copper washers which allows for indexing of the plugs to the DI injector, the HKS plugs do not. I went through and marked all my stock plugs and checked the indexing , when torqued they all lined up almost exactly. I then marked up the HKS plugs and did the same thing , they where all over the show. It’s going to take a bit of work to get them to index correctly but I wanted everyone to be aware of this if they are thinking of purchasing the plugs.
I know this is an old post but can these be indexed without the sealing washers from Mercedes? I know the HKS plugs have washers on them.
Just a heads up for anyone thinking on buying these and expecting them to be a straight swap.
Our stock plugs use copper washers which allows for indexing of the plugs to the DI injector, the HKS plugs do not. I went through and marked all my stock plugs and checked the indexing , when torqued they all lined up almost exactly. I then marked up the HKS plugs and did the same thing , they where all over the show. It’s going to take a bit of work to get them to index correctly but I wanted everyone to be aware of this if they are thinking of purchasing the plugs.
excuse the dumb newbie question. But what do you mean by the copper washer allowing you to index them? I’m planning on changing my hks to new one. So how would I index them if I follow mercedes oem NM spec? Wouldn’t they be all over the place?
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HKS Spark Plugs
