Onebig

Hey guys, newish member. I have owned a 88 rx7 convert with a TII swap. Fun car. My first rx8 was an 04 auto, which was a mistake, but did love driving it.

My current rx8 is an 08 6mt. It currently has 92k with a rebuilt that has roughly 22k. It has aem cold air, headers and midpipe. I recently installed d585 coils and a sohn adapter. I am big about premix and clean 2 stroke oil in the combustion chamber, have rebuilt a few rotaries in the past(not a renesis yet), but many 13b's. The ones that didn't premix had horrible damage to the housings and sides when failed. One's that premixed good housing and irons and also a lot more miles.

Anywho, on to my question. When I installed the new coils, they are bennetbuilt don't want to hear should have gotten BHR please, (I have been in contact with Tim to help figure this out), I got a chirping sound on startup. I have researched a lot on this and have found this is normal according to some post. Should I swap out the old coils to see if maybe one is bad or weak or issues?(which I have also found this may be an issue) The old coils had the white spot on the bottom, but didn't seem to have any issues. Starts are good, no misfires, cels, ran fine to 9k. With the new coils, only thing I noticed that was better was idle seemed to be better. Got even better after I cleaned the ESS and reset.

Enough of my rambling, is the chirp normal when cranking? NO noises when driving, revving, or anything.

UnknownJinX

Do you have a video for the noise?

My set of BHR coils did something like that. I swapped back to OEM C coils for now and no more chirping.

BTW, white spots on OEM coils aren't indication of anything.

9krpmrx8

iTrader: (46)

No a chirp is not normal and a chirp would be a mechanical issue so I don't see how coils would affect that. In the past I have worked on 8's that had a chirp and it was a loose or failing idler pulley. It could be worn belts as well.

Onebig

Thanks for the replies guys. I did reinstall the old OEM coils and the chirp disappeared. I have read numerous threads, that I could find, regarding this and it seems it is really a hit or miss when it comes to the d585 coils. I am going to keep running the "upgraded" coils, mainly because I am stubborn and paid for them, but also want to see if or how long it will last. Now mind you, this is a "play" car and I have a Jeep and my wifes car, so it's not detrimental that it gets me to work. That is what my tow truck is for. It also only does it when I am first starting it up for the first time. Doesn't do it after driven it and its warmed up.

The only article that I found is what seems to cause the noise is detonation when starting, but since its not under load when it happens it supposedly will not cause damage, something about a new flash and advancing the timing when starting/cold. I have no idea how true it was and/or is, but it seems logical. Maybe getting an access port will help, or maybe not. Still a blast to drive and doesn't make any noises when driving. Pulls nicely up to 9k. I have not gotten comp numbers, so do not know health of engine. I guess Ill cross that bridge when I get to it

9krpmrx8

iTrader: (46)

Weird, it makes no sense.

Onebig

Does it ever?

gwilliams6

Words of advice from the RX8club's writeup about coil choices:

Be wary of "LSx D585 coil upgrades", as not all D585 coils are created the same, and the standard generic D585 coil is not properly designed internally for the RX-8's ignition needs. They generally "work", but there are anomalies and performance issues that have to be solved, if they can be solved. Definitely NOT a plug and play option, even if it is advertised as "plug and play"

Onebig

I have read this many time, thus why I picked one with reviews and actual time driving it. I debated BHR and sakebomb, Have heard a few of them chirping with BHR, but was fixed with an accessport tune. Sakebomb not so many review and same with bennet. I chose Bennet just for no particular reason, but mainly price.

Im sure BHR and Sake would have had the same results, maybe not. Next upgrade is accessport, so maybe that will change. Who knows, Ill update it when it happens.

gwilliams6

Onebig if your research was really complete you would have found out that the BHR kit has the best longterm history of top performance out of the aftermarket coil kits for RX8. BHR kits don't chirp. If you have one that does chirp, send it back to Charles at BHR to be sorted out. BHR kits DONT need accessport to work. Where did you get that erroneous info ? Sake and Bennett kits don't have even a fraction of the real-world experience from satisfied RX8 owners as BHR does.

You are obviously having to work to make that Bennet kit work. Good luck

Onebig

I will agree, BHR is probably one of the best kits out there, if not the best. From what I have read, its their customer service that really sets them apart. I never said BHR's had issues, I said I have read some have made that noise. Some have followed up on their post said it was remedied, some haven't responded back or cared to follow up. Not knocking any brand, so nothing was "erroneous".

When I get back from Vacation, I will find out which coil is causing the issue and have it returned to be warrantied. I have already been in contact with Tim and he is aware of what is going on and will swap it out. No harm, no foul. Besides, if have read anything in this post, the car is running fine, except the chirp, from the new coils, so they are plug and play with no modification or work for them to work. The accessport is just a thought or a reason for me to buy, even though I do not currently need. Besides, the second post, he said he BHR kit chirped on startup, soooo, it does happen. No product is perfect, but I am 150% sure charles would have made it right for him if he chose to make it so.

But so far I am happy with Bennettbuilt coils, they have performed as expected. If it turns into more and more of an issue, lesson learned and I will get BHR. But at the moment, price won between the two companies.

UnknownJinX

It's known that D585 coils will benefit from a tune. You don't have to have it, but it's recommended.

There is a thread in RX7Club where someone tested a couple of different coils. D585 coil is shown to have a higher peak voltage than the stock coils with the same charge time, but the sparks also last shorter.

No product is perfect.

Sakebomb coils are different altogether with the IGN-1A coils. I think BigCajun has them on his and he seems pretty happy about them. They also could benefit from a tune.

Either way, OP, did you check your D585 coils with a timing light?