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$45.us for 4 coils?/Idea for auto's?

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Old 09-23-2015, 10:16 PM
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$45.us for 4 coils?/Idea for auto's?

Hey peeps! New RX-8 owner. 2007 Auto, with 100,000kms (aproximatly 60,000mi for my American friends). Has a factory/dealer installed "mazdaspeed" cold air intake. Although I don't have anything to compare it to, I believe I'm having power issues? I've done the plugs & wires (looked like they had never been done!), I know my next step is coils, but from all I've read on here it seems like it's nessisary to spend about 50-60us/each? Should I be staying away from sets of 4 for like 45us + shipping?

So I know because it's an auto I also miss out on like 2000 high end cause the trannies can't handle the heat? Has anyone heard of someone adding a HD-trany cooler and reprogramming to accept the higher rpm as a performance upgrade?..... Does anyone think this sounds like a good/bad idea?....
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Old 09-24-2015, 07:35 AM
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Originally Posted by JAYDOH View Post
Hey peeps! New RX-8 owner. 2007 Auto, with 100,000kms (aproximatly 60,000mi for my American friends). Has a factory/dealer installed "mazdaspeed" cold air intake. Although I don't have anything to compare it to, I believe I'm having power issues? I've done the plugs & wires (looked like they had never been done!), I know my next step is coils, but from all I've read on here it seems like it's nessisary to spend about 50-60us/each? Should I be staying away from sets of 4 for like 45us + shipping?

So I know because it's an auto I also miss out on like 2000 high end cause the trannies can't handle the heat? Has anyone heard of someone adding a HD-trany cooler and reprogramming to accept the higher rpm as a performance upgrade?..... Does anyone think this sounds like a good/bad idea?....
People have reported issues with no-name brand eBay coils and their ilk.. I'd stay away from them personally.

People have toyed with upping the rev limiter on autos, but I don't think that the concern was heat as much as it was centripetal forces exerted on the torque converter. That's an awfully big heavy piece of metal to spin at 9,000 rpm..

Do some searching and you'll find some answers, but proceed with caution. A clutch blowing up is traumatic, a torque converter blowing up would straight ruin your day.
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Old 09-24-2015, 09:12 AM
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Originally Posted by PotatoCannon View Post
People have reported issues with no-name brand eBay coils and their ilk.. I'd stay away from them personally.

People have toyed with upping the rev limiter on autos, but I don't think that the concern was heat as much as it was centripetal forces exerted on the torque converter. That's an awfully big heavy piece of metal to spin at 9,000 rpm..

Do some searching and you'll find some answers, but proceed with caution. A clutch blowing up is traumatic, a torque converter blowing up would straight ruin your day.
Thanx for the reply friend. Someone els said pretty much the same thing about the converter. So I'm definitely putting the trany-cooler idea on the back burner for now. Is there a 'performance converter' out there that would allow the higher rpm? Do you recommend a more efective way for an auto to perform the same or even a little better than a stock manual? Nothing to crazy though as I did buy the car for my GF who is a new driver, and she has to still be able to drive it without it scaring the hell out of her-know what I mean!?LOL!!!!
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Old 09-24-2015, 09:28 AM
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Cheap coils almost never work out.

Please do not post the same thread repeatedly.

Do read these threads in their entirety:

https://www.rx8club.com/new-member-f...t-here-202454/

https://www.rx8club.com/new-member-f...rx-8-a-233937/

https://www.rx8club.com/new-member-f...causes-249529/
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Old 09-24-2015, 09:34 AM
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Mod Edit: Duplicate thread deleted
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Old 09-24-2015, 10:56 AM
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Originally Posted by Steve Dallas View Post
Cheap coils almost never work out.

Please do not post the same thread repeatedly.

Do read these threads in their entirety:

https://www.rx8club.com/new-member-f...t-here-202454/

https://www.rx8club.com/new-member-f...rx-8-a-233937/

https://www.rx8club.com/new-member-f...causes-249529/
Thanx for your reply. Sorry for the double post. After I originally posted, I got a message saying as a new member I could only post on the new member post and was under the impression because I did not post under new member, that the first one would not be posted for others to see? So I reposted under new member. I tried to figure out how to remove the first one, but couldn't figure it out? My apologies for seeming to be rude. It will not happen again.
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Old 09-24-2015, 11:28 AM
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Originally Posted by JAYDOH View Post
Hey peeps! New RX-8 owner. 2007 Auto, with 100,000kms (aproximatly 60,000mi for my American friends). Has a factory/dealer installed "mazdaspeed" cold air intake. Although I don't have anything to compare it to, I believe I'm having power issues? I've done the plugs & wires (looked like they had never been done!), I know my next step is coils, but from all I've read on here it seems like it's nessisary to spend about 50-60us/each? Should I be staying away from sets of 4 for like 45us + shipping?

So I know because it's an auto I also miss out on like 2000 high end cause the trannies can't handle the heat? Has anyone heard of someone adding a HD-trany cooler and reprogramming to accept the higher rpm as a performance upgrade?..... Does anyone think this sounds like a good/bad idea?....
Hey everyone. Thanks for all the people responding with opinions on no-name coils. I'm sceptical about them myself.? What I'd appreciate even more is actual experiences with these coils? Putting what we all "think" about no-name parts as side, has anyone said "what-the-heck, it's less than the cost of one Name brand or original!" And tried them anyway? Love to hear about any positive or negative experiences with no-name/cheap coils?
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Old 09-24-2015, 11:32 AM
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Originally Posted by JAYDOH View Post
Hey everyone. Thanks for all the people responding with opinions on no-name coils. I'm sceptical about them myself.? What I'd appreciate even more is actual experiences with these coils? Putting what we all "think" about no-name parts as side, has anyone said "what-the-heck, it's less than the cost of one Name brand or original!" And tried them anyway? Love to hear about any positive or negative experiences with no-name/cheap coils?
https://www.rx8club.com/series-i-tec...s-ebay-247265/

It's literally, LITERALLY a sticky in the tech garage section..

I would advise reading these stickies and searching the forum before you aggravate some of the less politically correct forum members..
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Old 09-24-2015, 02:05 PM
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Originally Posted by PotatoCannon View Post
https://www.rx8club.com/series-i-tec...s-ebay-247265/

It's literally, LITERALLY a sticky in the tech garage section..

I would advise reading these stickies and searching the forum before you aggravate some of the less politically correct forum members..
Thanx for the heads up boss! I did read that forum, but found some possible discrepancies, like it's possible that the guy that started it may have missed some of the connecting pins? Some others menchened that you just need to bend the pins a bit to align them properly? It also appears that they were knock-offs being sold as OE?.. The add I found are not claiming to be OE, and some people in that discussion said if you make sure all pins go in the right place, you shouldn't have a problem?. I'm looking for others that can confirm from experience that the cheap coils will work fine or not, without any possibility of poor installation.

Thank you again for pointing me in that direction though. Cheers!
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Old 09-24-2015, 02:22 PM
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Good OEM coils prior to revision C tend to last 20K miles or less. (We don't have good data on how long C coils last.) How long do you expect knock-off coils to last? Is it a good deal to buy them 4 times to get to 20K? Is it worth it to keep troubleshooting every time something doesn't seem right?

If you can confirm they are Intermotor coils, then they are the same thing as OEM rev A or B coils, and they will work fine for about 20K miles. If you cannot confirm their origin, you must assume they are cheap imitations and that you will have problems with them. Very few people have had good luck with the cheap ones.
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Old 09-24-2015, 02:54 PM
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Originally Posted by Steve Dallas View Post
Good OEM coils prior to revision C tend to last 20K miles or less. (We don't have good data on how long C coils last.) How long do you expect knock-off coils to last? Is it a good deal to buy them 4 times to get to 20K? Is it worth it to keep troubleshooting every time something doesn't seem right?

If you can confirm they are Intermotor coils, then they are the same thing as OEM rev A or B coils, and they will work fine for about 20K miles. If you cannot confirm their origin, you must assume they are cheap imitations and that you will have problems with them. Very few people have had good luck with the cheap ones.
You make a very good point. I'm convinced it's better to just spend the money and get good quality. Your right about removing as much guess work as possible now & later on, cause if I get the cheap coils and it doesn't make it run better than I still have the question on wether it's still the coils or not? If I just put good quality on in the first place, makes for easier diagnoses if it's something else?.... Think I'm just going to make the better choice and spend the money. Thanx for that eye opening post man!
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