Mazda Oem Coils are crap! BHR Ignition I guess.....
#76
^+1,
I put in the BHR at about the same miles, and plugs will go in when I get back to my car.
I never had any idea that it needed coils except by reading here since the car was very smooth, but my scanguage started reading 269 hp instead of 259 hp as the top number after the BHR.
I put in the BHR at about the same miles, and plugs will go in when I get back to my car.
I never had any idea that it needed coils except by reading here since the car was very smooth, but my scanguage started reading 269 hp instead of 259 hp as the top number after the BHR.
#77
Why do people spout off nonsense but then refuse to test the very thing they're bitching about?
"most coils didn't show gains....we didn't test yours but we're sure they won't help any..."
Am I misreading that or? Whole thing seems confusing to me.![Dunno](https://www.rx8club.com/images/smilies/dunno.gif)
That's like saying "I hate fish, it tastes nasty, I've never tried it, but I know it tastes nasty"...
I guess it wouldn't be a BHR thread w/o somone trying to take a dump in it though![Lol](https://www.rx8club.com/images/smilies/lol.gif)
"most coils didn't show gains....we didn't test yours but we're sure they won't help any..."
Am I misreading that or? Whole thing seems confusing to me.
![Dunno](https://www.rx8club.com/images/smilies/dunno.gif)
That's like saying "I hate fish, it tastes nasty, I've never tried it, but I know it tastes nasty"...
I guess it wouldn't be a BHR thread w/o somone trying to take a dump in it though
![Lol](https://www.rx8club.com/images/smilies/lol.gif)
#78
SARX Legend
iTrader: (46)
Meh, the product speaks for itself as far as I am concerned. My kit has close to 30k on it. I had three sets of stock coils (all paid for by warranty and extended warranty) in 96,000 miles. I installed the kit on a fresh reman so I cannot speak of any power gains but I the kit does what it is supposed to do reliably (along with everything else I have purchased from BHR).
It is what it is, some products are good and some are bad. This one is superb.
It is what it is, some products are good and some are bad. This one is superb.
Last edited by 9krpmrx8; 05-16-2011 at 11:45 PM.
#80
Banned
iTrader: (3)
Oh, the "beam" plugs?
Those don't really "gap" well since the beam will snap off if your move it - it is cast, not forged or cold-rolled.
The beam goes away pretty quickly in FI applications, so it isn't a good idea, anyway.
The trailings are in the same boat, but there are less options for an exit path for the beam.
Those don't really "gap" well since the beam will snap off if your move it - it is cast, not forged or cold-rolled.
The beam goes away pretty quickly in FI applications, so it isn't a good idea, anyway.
The trailings are in the same boat, but there are less options for an exit path for the beam.
#82
Registered
iTrader: (25)
Oh, the "beam" plugs?
Those don't really "gap" well since the beam will snap off if your move it - it is cast, not forged or cold-rolled.
The beam goes away pretty quickly in FI applications, so it isn't a good idea, anyway.
The trailings are in the same boat, but there are less options for an exit path for the beam.
Those don't really "gap" well since the beam will snap off if your move it - it is cast, not forged or cold-rolled.
The beam goes away pretty quickly in FI applications, so it isn't a good idea, anyway.
The trailings are in the same boat, but there are less options for an exit path for the beam.
![](http://www.handymanlyness.com/archives/outdoor/power_equipment/snowblower_1/oesbmnx7a_snowblower_maint.jpg)
rather peculiar that you are alone with not finding power or having issues with FI on them, they have been the professional rotary racing standard for forever and still are
Brettus you are only alone in not having read the thread before posting
![Stick Out Tongue](https://www.rx8club.com/images/smilies/tongue.gif)
Last edited by TeamRX8; 05-17-2011 at 01:52 AM.
#83
"I wanna go fast!"
25% of my starts are somewhat hard. Some sound "free flowing" which im pretty sure is bad.
Anywayz.. i just hit 30k and the factory original plugs and coils are still on the car. Car is 7 years old. Idle can be a bit rough with a few low dips here and there. There is definitely a noticeable shortness of breath between 5.8k and 8k rpms. Threw a few misfires last year with some downshifts into third around 65-75mph.
I ordered the BHR kit as i have done so much reading on it over the years even before i owned this car. IM REALLY LOOKING FORWARD TO IT. Unfortunately, their supply chain screwed them and i gotta wait an extra week >.< lol oh well. No biggie really since i didnt get all my other mods in the mail yet that im gonna do at the same time for convenience. Bumper has to come off for fogs and AEM intake, and intake has to come out for ignition.
All these issues im having now started happening around 18k-20k miles anywayz. But the last 10k miles i put on the car i was low on funds and saving for blizzaks. Im pretty confident that this kit will make me a very happy customer. If it starts good, idles strong, and doesnt have a dead spot anymore... then im satisfied. If they last me a few years without issue then i will be forever satisfied.
Cheers.
Anywayz.. i just hit 30k and the factory original plugs and coils are still on the car. Car is 7 years old. Idle can be a bit rough with a few low dips here and there. There is definitely a noticeable shortness of breath between 5.8k and 8k rpms. Threw a few misfires last year with some downshifts into third around 65-75mph.
I ordered the BHR kit as i have done so much reading on it over the years even before i owned this car. IM REALLY LOOKING FORWARD TO IT. Unfortunately, their supply chain screwed them and i gotta wait an extra week >.< lol oh well. No biggie really since i didnt get all my other mods in the mail yet that im gonna do at the same time for convenience. Bumper has to come off for fogs and AEM intake, and intake has to come out for ignition.
All these issues im having now started happening around 18k-20k miles anywayz. But the last 10k miles i put on the car i was low on funds and saving for blizzaks. Im pretty confident that this kit will make me a very happy customer. If it starts good, idles strong, and doesnt have a dead spot anymore... then im satisfied. If they last me a few years without issue then i will be forever satisfied.
Cheers.
#85
#88
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I'd say the wires matter just as much as the coils. Greated coils in the world won't fire your plugs if there isn't a solid set of wires between them.
The stock wires aren't all that great. But having fantastic wires attached to a set of failing coils won't suddenly produce a better spark.
That being said, I'd suggest the theory that having upgraded wires on OEM coils allows the OEM coils to degrade much farther before "failing". Like if you call the "failure point" of the OEM coils where it can't transmit the current sufficiently, and it could be from excess wire resistance. Eliminate that problem and the coil can degrade much farther before it can't push the current through the wire.
It doesn't magically make the OEM coil better, just enables it to "last longer" before you have to replace it.
Just my theory.
The stock wires aren't all that great. But having fantastic wires attached to a set of failing coils won't suddenly produce a better spark.
That being said, I'd suggest the theory that having upgraded wires on OEM coils allows the OEM coils to degrade much farther before "failing". Like if you call the "failure point" of the OEM coils where it can't transmit the current sufficiently, and it could be from excess wire resistance. Eliminate that problem and the coil can degrade much farther before it can't push the current through the wire.
It doesn't magically make the OEM coil better, just enables it to "last longer" before you have to replace it.
Just my theory.
#89
Out of NYC
iTrader: (1)
well I took my RB wires out cuz at one time I had some issue with "morons" at dealership, so I just swap it with a brand new set of OE wires (cheap anyway)
Its been I think 20-30K miles since. maybe I should swap it back to RB on my next oil change (the RB wires had less than 5K miles I remember)
Its been I think 20-30K miles since. maybe I should swap it back to RB on my next oil change (the RB wires had less than 5K miles I remember)
#90
Interesting discussion here on the coils.
I'm wondering if heat, age or both contributes to the premature failure of the coils?
If it is mostly heat, I'm wondering if heat is getting INTO the coils from the engine OR if the heat is internal to the coils and is not being conducted well enough to the 'cooler' mounting surface?
If the coils could benefit from having better heat transfer to the mounting, would a film of heat sink compound on the mounting surface keep the coils slightly cooler and therefore last longer?
The 'white spots' that occur on all coils apparently are the hot spots and are also the center of the mounting surface.
Any thoughts?
Here 2005, 20k miles. No problems.
I'm wondering if heat, age or both contributes to the premature failure of the coils?
If it is mostly heat, I'm wondering if heat is getting INTO the coils from the engine OR if the heat is internal to the coils and is not being conducted well enough to the 'cooler' mounting surface?
If the coils could benefit from having better heat transfer to the mounting, would a film of heat sink compound on the mounting surface keep the coils slightly cooler and therefore last longer?
The 'white spots' that occur on all coils apparently are the hot spots and are also the center of the mounting surface.
Any thoughts?
Here 2005, 20k miles. No problems.
#91
FWIW, my first OEM coils were replaced after about 45,000 miles, the second set (about to be) after 30,000 miles. But both were showing symptoms long before being replaced, probably after 20,000 or so.
#92
Had no problems since fitting the magnecors.
#93
TBH, if I had the money spare, I'd buy a couple of sets of BHR's anyway 'cause I'm hoping to supercharge it soon, but I've got some gears and a LSD to save up for so it's tough
![Yelrotflmao Vi](https://www.rx8club.com/images/smilies/yelrotflmao-vi.gif)
Last edited by PhillipM; 05-17-2011 at 05:27 PM.
#94
Registered
iTrader: (2)
Interesting discussion here on the coils.
I'm wondering if heat, age or both contributes to the premature failure of the coils?
If it is mostly heat, I'm wondering if heat is getting INTO the coils from the engine OR if the heat is internal to the coils and is not being conducted well enough to the 'cooler' mounting surface?
If the coils could benefit from having better heat transfer to the mounting, would a film of heat sink compound on the mounting surface keep the coils slightly cooler and therefore last longer?
The 'white spots' that occur on all coils apparently are the hot spots and are also the center of the mounting surface.
Any thoughts?
Here 2005, 20k miles. No problems.
I'm wondering if heat, age or both contributes to the premature failure of the coils?
If it is mostly heat, I'm wondering if heat is getting INTO the coils from the engine OR if the heat is internal to the coils and is not being conducted well enough to the 'cooler' mounting surface?
If the coils could benefit from having better heat transfer to the mounting, would a film of heat sink compound on the mounting surface keep the coils slightly cooler and therefore last longer?
The 'white spots' that occur on all coils apparently are the hot spots and are also the center of the mounting surface.
Any thoughts?
Here 2005, 20k miles. No problems.
So the issue that Mazda sees is the factory coil itself is overheating.
#95
That also suggests that the thermal paste wouldn't help and that Mazda's solution is to provide more air circulation around the coils.
#97
Registered
iTrader: (25)
You really have no idea at all why they did or didn't do this.
#99
Registered
iTrader: (2)
This is the classic forum 1+1 = 3 thought process. Why not assume they are making the part lighter and using the hole slugs that were removed to economically make another part from them? You openly made an assumption then tried to label it as a fact from Mazda in the last sentence. Another assumption would be they did this so moisture would not condense between the bottom of the coil over time, resulting in a white residue buildup that then gets falsely labeled as a failed coil (yeah, that never happened) when in fact they are fine.
You really have no idea at all why they did or didn't do this.
You really have no idea at all why they did or didn't do this.
You really have no idea at all why they did or didn't do this either.
Oh Team I am so sorry for my incorrect wording making Mazda out to have done this specifically for heat dissipation. I made a logical guess as to why Mazda did this to the plate. Here let me correct my self.
So the issue that Mazda POSSIBLY sees is the factory coil itself is overheating.
Does that make you happy?
#100
Registered
The forum should really have "Thanks" and "Groan" buttons.