This kinda fixed itself then came back on the drive home after the last track day . After checking the turbo,wastegate and EBC solenoid I found the issue was actually the BOV stuck wide open.
So obvious that was it ..............now that I've found it . Put some high temp grease on it hoping that will be better than the oil that was on there.

I'm always leery of issues that appear to resolve themselves...like my electrical gremlins a while back. :suspect: It's just a matter of time until it resurfaces. And t-shooting intermittent issues c/b challenging...

Kudos chasing it down and getting it resolved. :icon_tup:

Too true ....
I feel a bit silly not realising that was the issue straight away as there were enough clues for me !

Kudos Brettus for the continued development. The power made sounds great, exceeding what I'd even expect from the platform for on-road conditions, but damn those packaging and clearancing concerns.

There was definitely more room in the older engine bays (FC/FD) for conventional turbo mounting that the RX8 and Renesis do not allow for. From a packaging standpoint the Renesis and RX-8 is best suited to staying N/A or going with a supercharger, though I prefer turbo characteristics for rotaries, especially in regards to noise management.

I'm excited for your car and intend to keep following it, but I think I'm coming to the end of the road for this platform making power. Not because it isn't possible (as some say), but because I want everything to remain reversible to full-stock and I don't feel I can hit my performance and durability targets without similar modifications as you've had to perform on your car.

Thanks :)
Not sure what mods you mean but there isn't anything i can think of on the car that's not reverse-able. But my feeling is that the car as a stock rx8 is worth practically nothing apart from the value of the parts I've put in .... It has 270,000kms on the clock and almost every panel is dented somewhere. I think our cars are old enough now that the loss in value from modifying them is not worth considering anymore ..... So I'd mod the hell out of it and create something awesome vs buying something new anyday.

yeh jeez if you are worrying about the long term value of a rx8, you be cray-cray

Yeah ...that's what I said. :lol:

Not worried about LTV at all. Any time I develop a product or build a car, one of my constraints is maintaining OEM structure. It could be argued the re-shaping of the floorpan is so minor as to not matter though.

^^^never go full cray-cray

Update : car has been performing awesome in this cooler weather ...feels like an absolute missile!
But ...................Just when I thought I had this setup sorted for the long term ..........another curve ball. Gull has just stopped the production of E85 in NZ so ........that fuel will no longer be available.
Thinking I'll have to go back to W/M injection even though I never really trusted it in the past ...... it's my only choice.

what is their reason,
lack of sales?

it’s just one more thing to go wrong imo, but yeah ...

Ugh, sorry to hear mate. That's exactly what I went through a few years back. Got it all dialed in on E50 and loving it and then the one station in town that had it stopped carrying it. Nearest station that has it too far away to make it worth while, I'd burn half a tank on the way home :lol: And getting a drum is too much for a DD. I've been running W/M since. I can't say for certain it's efficacy but, knock (pun intended) on wood, I haven't had a detonation event since (that I am aware of).

They are blaming the drought forcing suppliers to import rather than produce it plus a big diversion of ethanol for use in hand sanitiser. And perhaps mre importantly ..... they weren't selling enough so decided it was a good time to just can it!

Agree ...plus I really don't trust it in certain situations from previous experience. My old kit was primitive though so I'll go for something with a bit more finesse this time.

Got any recommendations for a kit ?

I got the Devil's Own DVC-30 kit with the progressive controller. I have the nozzle installed in an adapter in the silicone coupler between the charge pipe and throttle body. I *think* I am running a D07 nozzle, but it's been awhile so I'll try to confirm the nozzle size. I have it start coming on around 7psi and full on around 15psi.

DVC-30 methanol Injection Kits : DevilsOwn water Injection

Edit - yep it's a D07 - 7GPH nozzle. That was based off of their calculator and speaking with them. They said for a rotary they recommend doubling displacement in their calculator, so 2.6 liter. The calculator says 7GPH should be good for around 20psi or so @ 8000 RPM.

oh right,

I know you've not been high on it in the past...and experimented with various injection qty and locations. That's odd given Slash apparently has had good results.

Hopefully you post results along the way and perhaps spur more robust discussion on its efficacy...as I've been considering running W/M in addition to E30 to reduce summer IAT, gain a few more HP, and as a carbon cleaner.

Following w/ interest..

I can't remember if I've posted my bad experiences while running w/m. Possibly not so here goes :
1/ One day ,while tuning, I took off after sitting with engine heat soaking for maybe 10 mins. When the engine reached peak boost (maybe 13-14psi) it immediately detonated . Outcome : dead engine
2/While on track running about 1/3rd tank of fuel the fuel pump starved of fuel , engine detonated. Outcome : dead engine.
3/While on the dyno i did pulls with and without w/m. Outcome: significant loss in power with w/m running.

Now if I compare that with my experience of running E30-50 it's night and day . Have actually had fuel starve on track a couple of times with zero detonation. There have been other 'accidents' while tuning where the engine has run lean with zero consequences. Hence my trust in ethanol ............ not only is it failsafe (being in the fuel) but even when the circumstances are extreme, it provides excellent knock resistance.

However, two key things that have changed since those days which should impact the success of running w/m:
1/ I no longer run a restrictive system so EMAP now is probably half of what it was back then.
2/ Any new system will be progressive rather than all or nothing. This will mean turning it on way earlier and not losing much power at low rpm.

I certainly would prefer to run ethanol. I really pushed things and never had issues. But since I can’t get it anymore I threw in the W/M system. Like I said before I’m not making claims to it’s efficacy. Maybe it’s placebo. Maybe I’ve gotten better at tuning. I dunno :dunno:

well there’s the 100% meth approach that Howard Coleman is big on, but there’s a hazard factor that goes with it on a street car imo.

https://www.rx8club.com/rotary-swaps...1/#post4919911


he’s not big on e-fuel for rotary engines though.

.

C/b tuning..., c/b the W/M..., is likely both :dunno:; but reliably running anything near "430.0 rwhp/294.1 tq @ 17psi on 92 octane pump gas" doesn't happen by chance... You're doing something right, man.

Hopefully, between your's and Brett's setup, whatever he comes up with...his hand having been forced, will illuminate how W/M can best be used to increase reliability &/or extract HP from our engines.

I have followed his threads and read most of what he has to say about ethanol . It was part of the reason why I never pursued the idea of going full E85 a few years back. I certainly haven't seen any of the issues he was reporting for E85 whilst running E30-50.

Ok ...I have a plan.
Have found a local supplier for both ethanol and methanol. ATM ethanol is 3x the price of methanol for reasons mentioned above. I can buy E98 which comes mixed with 2% methanol or straight methanol in 200L drums or 20L containers (much more expensive than drums unfortunately)

So ...... gunna try E10 as my base fuel and add 10L of methanol per 50L . I figure that will give me comparable octane to the E28 mix I'm currently running.
Current premix is good for ethanol or methanol so no worries there.