Notices
New Member Forum A place for new members to get their feet wet

Dreaded Topic: Revision C vs. BHR vs. Bennett Built

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 02-22-2018, 06:11 PM
  #1  
Registered
Thread Starter
 
DCGULL's Avatar
 
Join Date: Jan 2018
Location: Epping, NH USA
Posts: 11
Likes: 0
Received 1 Like on 1 Post
Dreaded Topic: Revision C vs. BHR vs. Bennett Built

So, GREAT News! I'm the proud new owner of a 2008 40th AE with 68,000 miles on it. 3 prior owners, no reported accidents, and, a family 'project car' in the making. Good luck, great timing, stars in alignment- I got a smoking good deal on it, BUT, I need to go get it. So excited, and, can't wait to enjoy it and even excited about the 1/2 cross country (1,000 miles) road trip.

No stories really, bone stock, was in for dealer diagnosis of coolant sensor- broken, but, let's check compression- well above acceptable tolerances (Sept 2017). No numbers given, no specifics on either rotor, or, spin speed... Oh well- the owner isn't complaining about hot starts either, so... it's risk I'm just gonna take. I prefer all warning lights off, all pieces/parts working as designed, so, I'll address things as they arise- and they certainly will come up on a 10 year old car.

But, it's a 'project car' with my teenage kids, so, there will be no boosting, nor any crazy rear wings (can barely stop the youngest from showing me pix of the ones he LOVES!), but, after research, I've decided that a few things need to happen before the floodgate of mixed ideas overwhelm the poor car. Here's my list:

1) SOHN sandwich plate adapter & install kit.
2) replacement ignition coils...*** Thread Focus, please.
3) Go to full synthetic (10W-40) & premix with Premium gas.
4) All Fluids: Coolant, Transmission & rear end chuck.
5) Coolant overflow bottle with sensor (to repair broken one in original bottle)

So, this where things get a little sticky. The car was relatively inexpensive, and, insanely cheap compared to sports cars of similar vintage. I plan on giving the kids the keys virtually any time they ask, and, promise to ask loaded questions ONLY occasionally- tossing before checking most often- whether the trash is out... Based on my gut, it looks far sportier than it accelerates, and, it handles better than almost any other car on the planet- a win/win with kids. A modern Porsche 912, if you will. It'll never be a track car, it may do safety trainings at local tracks, it may weekend autocross, but, it'll never be worth more than the day I bought it. Dents, dings, scratches are gonna happen ( 4 children, 3 boys: 22, 21 & 14, and, 1 grrl; 17). Ultimately, a car sacrificed to the Car Gods for the lives of teenagers (We were teenagers once, and, I know that cars went to heaven with us driving them)

Back to the issue at hand, Coils, been reading threads, and, having impure thoughts about NOT buying BHR coils. I know, I know- I'm wearing flame retardant underwear, and, I'm waving an American Flag and singing a good song about small 'Merican companies making good with the good intentions & sweat of dependable employees- I can hear the music- can you? Well, I can get Revision C coils (which look exactly like the originals, and, Revision B for that matter) for say $200.00 on my doorstep, (Not Ebay, but, a forum sponsor for Heaven's sake!). Now, I do like the heat soak plate on the LS D585 coils, and, Bennett Build has done all of the wiring needed for a plug n play solution AND added an additional ground to the battery for $330.00 to my door. Then, for twice as much- 3 times Revision C- I can enjoy the BHR version. In all cases, I will remove and replace the original coils, so, Revision C 'fits' into existing bracket (although it seems that I will need to remove it from the engine to mount each to the bracket), both BB & BHR solutions are bulkier and may require trimming to fit in the existing location.

Remember, this RX-8 will never have wax removed with a baby diaper, nor the under carriage flossed, and, it-like the neighborhood mutts- will sleep outside, under the stars for the very first time in it's well cared for life. This project will possibly be worse than stock actually, and, realistically. I've been told of plasti-dip ORANGE on emblems, etc. and, questions regarding ORANGE high temp enamel/epoxy paint for calipers have been raised- so, obnoxious is in the mix.

So, does anyone have experience with Rev. C OEM coils? Do they last 40k, like the revision B's, or- longer, as I've heard rumors of, but, never from actual owners. Any experience with them? Or, do I need to be the guinea pig on them for this forum. I can get 3 sets for 1 BHR set, and, very modest as individuals. Heck, leading fires 3 x's as often as trailing, so- I could swap if needed if on the road, far from home?

Go easy, I'm old (53). Go easy, I'm nice. And, I promise, I'll wait til it's warmed up before hooning it, Really. It's the kids I worry about...

Dave
Old 02-22-2018, 06:24 PM
  #2  
Administrator
iTrader: (7)
 
Jedi54's Avatar
 
Join Date: Mar 2004
Location: The Dark Side
Posts: 22,394
Received 2,625 Likes on 1,875 Posts
Hey Dave,

first off, WELCOME to the club! The RX-8 is as you described it, a great torquless little wonder that handles better than most cars priced above it.

as for your list.
  • SOHN adapter is nice and many have used it, I just pour a few ounces of premix in the tank every fill up and call it a day.
  • Ignition coils are vital to this car. (more on that in a bit)
  • synthetic: oh boy.. this'll start a flame war quickly but lets just make it simple. This little firebreather of an engine will use and burn up anything you put in it so don't overthink it. If you want synthetic, go for it and stick with it but normal oil is perfectly fine. Depending on where you live, I usually recommend a heavier weight oil. I use 10w-30 in mine.
  • Definitely change out the fluids. For the transmission, make sure you get the right kind and know that some owners here locally had issues with Royal Purple where as Redline seems to work just fine.
  • Coolant overflow bottle: yup, that little guy loves to break if you so much as look at it sideways so check with some of the forum vendors here and I'm sure they can get you one for a good price.

alright, back to the main question: coils.
No experience with Revision C coils as I haven't needed them due to running BHR coils for probably 8 years now? I've had them in there so long I've forgotten what it's like to change coils as the kit is truly plug and play. There's no need to trim or fit anything with that kit.
Is it more expensive? yes.
but honestly with getting such a great price on the car, why not splurge a little here and know that'll be one thing you won't have to worry about again down the road. Just my $.02

Enjoy the car and if we can be of any help, don't hesitate to ask.
The following users liked this post:
AirlockRX (07-30-2022)
Old 02-22-2018, 07:37 PM
  #3  
///// Upscale Zoom-Zoom
 
wannawankel's Avatar
 
Join Date: Nov 2009
Location: Massachusetts
Posts: 1,567
Received 179 Likes on 156 Posts
I would go for the BHR kit - I went with the Revision c coils ex. Mazmart just because I still have an engine warranty.
Old 02-22-2018, 08:06 PM
  #4  
You gonna eat that?
iTrader: (1)
 
BigCajun's Avatar
 
Join Date: Jan 2013
Location: Kansas City, Mo.
Posts: 5,989
Received 2,591 Likes on 2,111 Posts
There is another option, the Mercury IGN-1A coils.

https://www.rx8club.com/rx-8-discuss...thread-259001/

There is a plug & play kit that came out a couple of years ago from SakeBomb Garage.
I have it, I like it.
I replaced a BHR kit with it 2 years ago, simply because I wanted to try it, and not because I wasn't satisfied with the BHR kit.

https://www.rx8club.com/sakebomb-gar...il-kit-259764/

Last edited by BigCajun; 02-22-2018 at 08:11 PM.
Old 02-22-2018, 08:27 PM
  #5  
40th anniversary Edition
 
gwilliams6's Avatar
 
Join Date: May 2008
Location: Grapevine, Texas
Posts: 2,925
Received 133 Likes on 114 Posts
Have had the BHR coils in for over eight years now and they still run flawlessly. The best of many investments I have made in my 2008 40th Anniversary Edition. (switched to the BHR coils after about 25k miles on the stock B-coils).

There are other choices for coils, but no other choice has as many happy RX8club users, and as many hundreds of thousands of miles of proven reliability and longevity.(yes, easily hundreds of thousands of miles from all the RX8 owners who bought them and are still driving them). They are a direct (albeit snug) fit, no worries there

Last edited by gwilliams6; 02-22-2018 at 08:31 PM.
Old 02-22-2018, 08:35 PM
  #6  
40th anniversary Edition
 
gwilliams6's Avatar
 
Join Date: May 2008
Location: Grapevine, Texas
Posts: 2,925
Received 133 Likes on 114 Posts
Hopefully you have the service records. Be sure to examine items on this maintenance list: Any neglected item here can cascade into a bigger and/or an expensive problem if ignored in any used RX8 with your mileage, no matter have well it all seems to run.

RX8 Club’s recommended maintenance schedule, more comprehensive and proactive than Mazda’s schedule.
30,000 miles:
- Replace Ignition coils
- Replace Plug wires
- Replace Spark plugs
- Clean MAF (mass air flow sensor)
- Clean ESS (e-shaft sensor)
- Reset ESS profile
- Clean power steering connections
- Clean battery terminals and clamps
- Replace transmission fluid
- Replace coolant (Mazda FL-22 is highly recommended)
- Replace air filter
- Replace brake fluid (fluid in the brake lines AND the clutch line)
~$300 USD in parts if you shop smartly.


every 60,000:
...all 30,000, plus...
- Clean all chassis electrical grounding points
- Replace accessory belts
- Clean OMP lines
- Replace rear differential fluid
- Replace thermostat
- Clean / Straighten AC condenser fins
- Clean / Straighten oil cooler fins
- Inspect catalytic converter
- Clean / Inspect intake valving
- Consider / inspect all points in 90,000+ as well, many items fail early
~$130 USD in parts if you shop smartly.

90,000:
...all 30,000, plus any 60,000 not yet done, plus...
- Replace coolant bottle
- Replace radiator hoses
- Replace radiator
- Replace front O2 sensor
- Replace motor mounts
- Inspect clutch pedal assembly for flex / weld breaks
~$900 USD in parts if you shop smartly.
At 100k, anything original in the cooling system is really suspect and failure prone. It represents the biggest threat to your engine.

Last edited by gwilliams6; 02-22-2018 at 08:43 PM.
The following users liked this post:
skyhighclaw (12-16-2019)
Old 02-22-2018, 08:52 PM
  #7  
Registered
iTrader: (1)
 
jer2911's Avatar
 
Join Date: Sep 2015
Location: Anderson, South Carolina
Posts: 203
Received 22 Likes on 18 Posts
Two of the three that I have are running BHR coils. The third is stock. If you are still on the first engine, buy the rev c coils only because you will be in need of a rebuild by the time they expire. Be careful with the expansion tank replacement, its very easy to break the hose fitting from the radiator. Jedi is wise about the oil and sohn adaptor, I have one on my newly built engine just because its new,(also built by BHR). I bought the first one for my daughter's 18th birthday three years ago and fell in love with the car so I bought two for myself. Good luck with your children and the 8, they will be a blast to bond with.
Old 02-23-2018, 05:16 AM
  #8  
Registered
Thread Starter
 
DCGULL's Avatar
 
Join Date: Jan 2018
Location: Epping, NH USA
Posts: 11
Likes: 0
Received 1 Like on 1 Post
WOW!

Thank you ALL for your kind & respectful responses- I've read too many threads that degraded into name calling and hate, so, I'm grateful that you all seem to understand that this is NOT my typical build! I think I'll end up in the same boat as the gentleman with 3 now- after gifting his daughter one. I've already got a saved search on autotrader.com for an '09 - '11 RX-8 R3, which would see diapers, floss and other owner insanity.

I liked the consideration of time/miles til rebuild- that reflects my sincere concern about this 70k mile engine, with 3 prior owners. Kids, due to hormones, age, selfishness, new wings- well, none of that bodes well for a car. I've built withOUT the kids, but, as distance increases, we need an excuse to be together without forced eye contact. (Driving- always a safe place). I have REALLY GOOD kids, but- they're teenagers. Cars- they come and go- kids last forever.

Build budget is: B=.5P, where B is Budget, and, P is purchase price, so- all in- we can't exceed $2,750.00 including shipping, install, etc... I hope that we never press the upper limit of dollars, but, who knows. They MAY even treat it right (OK, a guy can dream). So, checking GWilliams post, there are more dollars going out for general maint. than I 'planned' on initially, gotta save pennies for the fun stuff. The depressing sounding direction of this build (sorry, but, I find it a lil depressing), and, knowing that even if it ends up 'perfect', I expect value to drop at least 50%, due to mods, miles & availability within 2 years. And, I probably will get a genuine project version (off limits) as this begins it's slide into disuse.

I hate to cut corners, but, am compelled to consider true outcomes. If I can get 20,000 miles out of this motor with TLC- they will wander off as it becomes a rebuild anyways. And, if they haven't curbed it to death (wheels, side skirts, F & R bumper covers), I may use it as the next project vehicle? Just thinking out loud...

Thanks for the very warm welcome, SakeBomb will be checked out, thanks for the bonus info- all great, all appreciated! Still want owners with Rev C coils installed to share input (would love to get an idea of life span). I'm going to need a catless test pipe (already have some ideas) but, would like to do the right thing, and, not risk the motor by cheaping out,,,

Thanks again for great info!

Dave
Old 02-23-2018, 08:56 AM
  #9  
You gonna eat that?
iTrader: (1)
 
BigCajun's Avatar
 
Join Date: Jan 2013
Location: Kansas City, Mo.
Posts: 5,989
Received 2,591 Likes on 2,111 Posts
Couple more things, for the BHR you'll want to remove the engine lift bracket to avoid a short.
Trust me.
The SakeBomb kit is the most expensive kit I'm aware of, and doesn't fit as designed on Sport models.
Old 02-23-2018, 09:09 AM
  #10  
SARX Legend
iTrader: (46)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 33,784
Received 452 Likes on 366 Posts
BHR, I have close to ten years on my set, it is on it's third engine. I recommend rev C to anyone who doesn't plan to keep the car long and that is most RX-8 owners these days.

As for the engine mount removal, I'm not sure why you would need to do that, pretty much every 8 owner I know has this kit and I have never seen an issue.
Old 02-23-2018, 09:24 AM
  #11  
Rican
 
boricua13's Avatar
 
Join Date: Aug 2014
Location: Niagara Falls, NY
Posts: 274
Received 165 Likes on 131 Posts
I removed my lift bracket when I installed the BHR kit as it was a very tight fit with it. Not sure if it would have caused a short, but better safe than sorry.
Old 02-23-2018, 10:46 AM
  #12  
You gonna eat that?
iTrader: (1)
 
BigCajun's Avatar
 
Join Date: Jan 2013
Location: Kansas City, Mo.
Posts: 5,989
Received 2,591 Likes on 2,111 Posts
Originally Posted by 9krpmrx8
BHR, I have close to ten years on my set, it is on it's third engine. I recommend rev C to anyone who doesn't plan to keep the car long and that is most RX-8 owners these days.

As for the engine mount removal, I'm not sure why you would need to do that, pretty much every 8 owner I know has this kit and I have never seen an issue.
It shorted out on mine, the gold lift bracket.
Kept popping engine fuses one freezing cold day after work.
Only time I ever had it on a tow truck.
Old 02-23-2018, 11:16 AM
  #13  
SARX Legend
iTrader: (46)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 33,784
Received 452 Likes on 366 Posts
Sound like an installer error to me.
Old 02-23-2018, 02:18 PM
  #14  
Registered
iTrader: (1)
 
Loki's Avatar
 
Join Date: Jun 2009
Location: Montreal
Posts: 7,709
Received 952 Likes on 830 Posts
I had the same thing (after 7 years). Charles pointed out that the instructions for the BHR kit include removing that hanger bracket.
Old 02-23-2018, 02:53 PM
  #15  
SARX Legend
iTrader: (46)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 33,784
Received 452 Likes on 366 Posts
Instructions? Pffft.
Old 02-23-2018, 02:58 PM
  #16  
Administrator
iTrader: (7)
 
Jedi54's Avatar
 
Join Date: Mar 2004
Location: The Dark Side
Posts: 22,394
Received 2,625 Likes on 1,875 Posts
instructions?
pfffft. Ain't nobody got time for dat ****.

Old 02-23-2018, 06:31 PM
  #17  
Registered
 
Motakai's Avatar
 
Join Date: Nov 2017
Location: Markdale Ontario, Canada
Posts: 55
Received 2 Likes on 2 Posts
Originally Posted by DCGULL
WOW!

Thank you ALL for your kind & respectful responses- I've read too many threads that degraded into name calling and hate, so, I'm grateful that you all seem to understand that this is NOT my typical build! I think I'll end up in the same boat as the gentleman with 3 now- after gifting his daughter one. I've already got a saved search on autotrader.com for an '09 - '11 RX-8 R3, which would see diapers, floss and other owner insanity.

I liked the consideration of time/miles til rebuild- that reflects my sincere concern about this 70k mile engine, with 3 prior owners. Kids, due to hormones, age, selfishness, new wings- well, none of that bodes well for a car. I've built withOUT the kids, but, as distance increases, we need an excuse to be together without forced eye contact. (Driving- always a safe place). I have REALLY GOOD kids, but- they're teenagers. Cars- they come and go- kids last forever.

Build budget is: B=.5P, where B is Budget, and, P is purchase price, so- all in- we can't exceed $2,750.00 including shipping, install, etc... I hope that we never press the upper limit of dollars, but, who knows. They MAY even treat it right (OK, a guy can dream). So, checking GWilliams post, there are more dollars going out for general maint. than I 'planned' on initially, gotta save pennies for the fun stuff. The depressing sounding direction of this build (sorry, but, I find it a lil depressing), and, knowing that even if it ends up 'perfect', I expect value to drop at least 50%, due to mods, miles & availability within 2 years. And, I probably will get a genuine project version (off limits) as this begins it's slide into disuse.

I hate to cut corners, but, am compelled to consider true outcomes. If I can get 20,000 miles out of this motor with TLC- they will wander off as it becomes a rebuild anyways. And, if they haven't curbed it to death (wheels, side skirts, F & R bumper covers), I may use it as the next project vehicle? Just thinking out loud...

Thanks for the very warm welcome, SakeBomb will be checked out, thanks for the bonus info- all great, all appreciated! Still want owners with Rev C coils installed to share input (would love to get an idea of life span). I'm going to need a catless test pipe (already have some ideas) but, would like to do the right thing, and, not risk the motor by cheaping out,,,

Thanks again for great info!

Dave
I got myself a 2010 R3 up here in Canada, and I've come to the conclusion (Developed by talking to the technicians at Mazda dealers) that Series 2 8's should remain stock cept' for the an ignition upgrade. From their experience the series 2 fixed the grand majority of the problems, and those that did develop were the result of the driver (Slamming the redline for long periods, not enough oil, not the right oil, overheating the car by driving it way too hard, letting it sit unused) neglecting the vehicle. The only thing I've heard up here that would truly help an 8 if you weren't the original owner and were on the ball about everything (proper fluids & changes + lots of preventative maintenance) is a mid-pipe/decat.
Old 02-23-2018, 10:33 PM
  #18  
Smoking turbo yay
 
UnknownJinX's Avatar
 
Join Date: Apr 2017
Location: BC, Canada
Posts: 3,104
Received 665 Likes on 591 Posts
Yes, get rid of the engine hanger bracket if you install the BHR ignition coils. It shorted out my coil as well.

Also, BHR coils work better if you can change the dwell settings by tuning your car. The spark from D585 coils have higher peak voltage but also last shorter, so a longer dwell compensates for that. Not sure how much effect that has on an otherwise stock engine, but it's just good to know.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
suzukisteve
New Member Forum
29
10-11-2017 07:49 PM
RX8_666
Far East/Asia
3
12-27-2004 03:17 AM
WilliamT
RX-8 Multimedia/Photo Gallery
9
08-21-2004 05:19 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Dreaded Topic: Revision C vs. BHR vs. Bennett Built



All times are GMT -5. The time now is 01:34 AM.