Hello all,

So I consider myself a spirited driver and after several years, and now having burnt through 2 sets of coils I finally grew tired of the Mazda OEM coils. I have to say the fluctuating gas millage and performance got quite annoying. This lead me to the BHR Ignition kit, which I ordered and anxiously waited for (maybe even a little annoyingly impatient, but that'd be up to Charles lol). Anyway, I got the kit in (after a couple small weather delay's) I put it in immediately. The install with the AEM intake was rather smooth, I just had to remove the strut tower brace. I will admit it is a tight fit as it pops onto the 4 studs.

First I will say for me the improvement was more then immediately noticeable since my old Mazda coils were in the icy grip of death lol. It was a wonderful feeling have the car fire right up with out a single miss-fire. On top of that, I was able to notice an immediate jump in my gas millage. On fresh OEM coils and plugs I could get about 20.5mpg. As those coils were dying it dropped as low as 14-15mpg. Now with the coils on (and before I could swap out my plugs with almost 30k on them with the fresh spare set I keep in the garage) I was able to once more see 20mpg. On top of that, yesterday I went out with some buddies on a drive up through the White Mountains here in NH. Through out the trip the throttle response was absolutely wonderful and she felt good all the way through the RPM range (mind you I have 149k miles on the engine). We headed out from Littleton, freshly fueled up at around 1pm and drove the mountain roads aggressively till about 5:15pm, during this time I barely burned through a 1/3rd of a tank. I'm changing the spark plugs today, so will see how a fresh set of plugs feels in the car but it's hard to imagine it could get even better.

All things said, the guys at BHR seem to be on top of their game and I'm curious to see what else they put together to offer the community. Kinda wish they were around for the RX-7 community haha, would like to see what they could do for my old 83 :p

Next up for my baby is a full custom exhaust and some retuning, which may include some more indepth tweaks (almost forgot how much I hated my Assembly classes in college) but more on that later.

 

the most interesting in this post is 149k on the engine o.O.. we gonna wanna hear what oil u use and what warm up you use.

 

Truth

 

LOL, oh come on 149k isn't that hard :p I have 232k on my 83 RX-7 and she runs like a champ.

Acutally use the same process for the 8, figured it worked well for the lil 12A in my 7. I use 5w-30 in the winter, 10w-30 in the summer and check my oil regularly and I only run Castrol GTX. I have also been running Slick 50 in the engine for a long time, I add 1 bottle every 50k miles or so. For warm up, I give the car about 90s to get oil up to pressure and flowing, then keep the RPM's low (below 3k normally) till temps are above ~110*F, then below 4.5k till completely warm. For the first 125k miles I ran 89 octane fuel, when the coils began acting up I switched to 91. When the car had 55k on the motor (running 89 octane) I was at a show and got a free dyno run (friends parents were there with their dyno-pack dynometer) and she showed a solid 184hp uncorrected on the dyno. I installed the AEM intake around 144k, before that I was running a K&N drop in.

The only issue I've run into was my SSV valve had stuck closed for a time. I corrected this by removing the UIM and using a long screwdriver, hammer and B-12 Chemtool. The valve freed and the engine blew a little smoke but that was about 30k miles ago and I've yet to have it even feel hesitant since. I also suffered a failure of the Secondary Air system, which I have left removed with the vacuum line plugged (borrowed a friends airpump to pass inspection), along those lines for more then 30k miles I haven't run a CAT on the car and it hasn't thrown a code.

I am currently running the N3Z2EU00013H60 calibration on the ECU, only issue that has been noticed is a rich mixture between shifts (11.2afr) resulting in little backfires or puffs of black smoke. Timing is -5 to 44 depending on load and throttle position. My idle sits right at 800rpms on average with a near stoich AFR.

I really haven't had to do anything special to keep her running nice, I don't launch at stop lights and tho I do at times redline her about once a week, normally I see no reason to go above 8k RPMs, just no power up there, esp in the higher gears. I also keep the RPMs about 2.5k while driving.

There, I think I covered all the bases.

 

Congrats on hitting 149k! Hopefully you get well past 200k My car recently turned 50k and will be ordering BHR coils soon.

 

Yup, I want me some BHR ignition system and new spark plugs... maybe even seafoam before I install... idk, it'll be all in the future, I cant wait...

 

thanks, sounds like we are not too off base with our recommendations from this 1 example.

 

Tease.

 

Thanks otakurx for the nice review. BHR appreciates it.

 

my main reason for getting the kit is to get back some mileage and keep it that way. average 12 city, 14 highway since i bought this car in november. so far as i know they are still on original coils and plugs. hopefully i have some respectable mileage numbers like yours after...

 

12/14? that is very off base. compression problem? too rich? faulty MAF sensor? oversized tires?

 

Tease

 

+1!!!

parts for my 81 would be super duper awesome. even though there are quite a few suppliers already.

 

Being a member of BHR and the owner of an '87 RX7 FC TII,, I have a small () amount of say in the products that BHR offers. I'll tell you that BHR has been looking into the RX7 market for products. I'm on the RX7club.

So deadphoenix52 and otakurx keep your eyes open for some stuff in the future.
As far as all the other aftermarket parts available for the FB, FC, FD we can get a lot of them right now.

 

Zoom Zoom......................

Nice to know what it is with an upgraded coil system.

 

Your very welcome!

 

The FD crowd, and most of the later FC crows are catered to by and large form the big name companies. its us vintage rotaries that have trouble finding things.

also, in part, because many of the parts you cant buy anymore

 

Please stop doing that.
PTFE has absolutely no benefit for the motor and can clog your oil passages over time. It is not a lubricant, it does not "bond" to the metal in the engine and it does nothing but restrict the flow of oil through the OMP and oil filter.
Slick 50 is beyond a shadow of a doubt and with no acceptable counter-argument, completely snake oil.
Save yourself the money - you are only damaging your engine's lubrication system.

 

Just ordered this as of about 10 mins ago for my brother...in about 2 weeks ill order another for myself to bad im in iraq and cant help put it on

 

Put my kit in on thurs. I absolutely love it. Got my mpg back from death. She's definitely a little perkier.

 

bad coils..?