Been bringing my new 'built for boost' engine up to speed. This is as far as I've gone with it so far. Have an event this weekend - not wanting to go too hard too soon.
Has better response than anything I've tried previously though.
https://cimg9.ibsrv.net/gimg/www.rx8...06f8149107.png
This was with E20, APV restrictor , 14psi in midrange tapering down to 12.5 at 8000 . Boost cut set at 7700
https://cimg5.ibsrv.net/gimg/www.rx8...53157ab876.png

Damn, that's some good power. I'm assuming that's shaft HP?

wash your mouth out ..... that's whp baby!

I stand corrected! That's fantastic. I cannot get E20 around here, though. It's just a range of E10-E15.

I make up the % myself . Just mix some premix in ethanol and tip it in when I fill up at the pump.

Did a run last night in cool air (18C), at just over 14psi accelerating in 2nd through 3rd. What a monster.
The small changes made to the engine have worked great, this is particularly noticeable 2nd gear. Turbo is fully spooled in 2nd before 4000rpm which makes it feel like the car just leaps into action out of corners. I overlayed 2nd and 3rd gear logs to try and show what I mean . The engine now makes as much power as in 2nd gear at 4000rpm as it does in 3rd. Never been able to do this before!

https://cimg7.ibsrv.net/gimg/www.rx8...9b5a5451a3.png
blue/red is second
yellow/green is third

300 lb feet of torque is something else at 5k RPM.... I'd imagine that would feel like a whole new car.

Brett, now that your setup is developing well, how much boost do you think you can use on pump gas? How much power do you estimate on ordinary fuel?

When on pump gas (98 octane E10 -93US) I'm running under 10psi. From past experiences this is where I'm comfortable. I know it can take more but it's one of those situations where................. one day it wont. So that's my pump gas limit.
At 10 psi peak power is up around 320-330whp

Had another good day at Mad Mikes summerbash today. Gave me a chance to test the new engine ... it did not disappoint.

https://cimg6.ibsrv.net/gimg/www.rx8...f9ed5de591.jpg
Mad Mikes new car/engine

https://cimg0.ibsrv.net/gimg/www.rx8...f87eb69ef9.jpg
https://cimg1.ibsrv.net/gimg/www.rx8...d2892396dc.jpg

https://cimg2.ibsrv.net/gimg/www.rx8...4bdbec3dca.jpg

Thanks to Kylie from Kybosh for the pics

https://cimg1.ibsrv.net/gimg/www.rx8...3d48201d89.jpg
Our crew ....

Seems I'm stuck on 14psi for the meantime. Can't get enough traction in 2nd on the current 265s to go any higher for the roll racing coming up this weekend.

Any option for boost by gear?

Its crazy you spin them up, as I supppse you're running some very low TWR tires.

Boost by gear/rpm would be the way to go for sure. Will look at that for the future if I get serious about doing well in these roll racing events.

Lack of traction isn't something I hear RX8 owners complain about too much, congratulations.

you must not know anyone with an REW RX8 then

and immajust just a talkin’ to teh wall as usual as well

https://www.rx8club.com/series-i-maj...4/#post4987902


https://cimg4.ibsrv.net/gimg/www.rx8...9e9028fa7.jpeg
miss you 9k 😭
.

https://cimg2.ibsrv.net/gimg/www.rx8...db55d1cc3b.jpg

Another event today: 'Superfest' at Hampton downs'. Was an up and down kinda day for me, the 8 was running great but started having fuel trim issues midway through the day which meant it was running lean so the failsafe gauge did it's job and dumped boost. Didn't take my laptop so ended up disconnecting the battery every 10 mins or so so I could get a decent roll race result. Wont let that happen again, if I can't find a culprit I'll just disable closed loop for these events from now on.
When on song I was still getting beaten a lot, but I suspect most of the cars were roll race specialists running boost by gear etc. Despite that the 8 was staying in touch with some very quick/very expensive builds.
I really must get boost by gear if I'm going to keep doing this.

The purple 8 in the background is running the legendary inline 6 'Bara' engine and was ripping it up all day on the skid pad. Have to say it sounded great and attracted a lot of attention!

I’d rather gift you one than keep beating my head on the wall, it’s really starting to hurt :suspect:

https://sirhclabs.com

otherwise, what are the tire class/ruled limitations, assuming there are any? Because there are streetable tire options that, while you wouldn’t want to use them daily, will take that output level without spinning.

Inline 6s are the ticket imo, but the 13B exhaust pulsing is a close match.
.

I'm only just starting to get into this and I'm not in an actual competition, so it's not that I really 'need' to do anything. Just because I haven't done it yet after you mentioning it once or twice doesn't mean I'm not listening..........calm down ;)

Oh I so wish there was an affordable standalone boost controller on the market, too bad no one has suggested one. Truly, I am in dire straits, if only there was a solution to be had. Alas, this dearth of boost controllers is a blight on my existence.

Am I doing it right?

Team send me free stuff thx

:yelrotflm

@ciprianrx8 i think you have been called uppon. It should be easy to get gear information from ekther speed/rpm or other information provided by ECU (you lnow better anyways).

still dishonest to the core I see.

remember back when you had a complete meltdown and said you would never except anything from me, even for free? No different than the one who started this thread, the flocking birds of a feather.

did you even bother to read about the “same ol’ boost controller”?

because it’s not, but laugh and mock as usual, not being capable of much else.

No, it’s essentially an add-on pc-based ecu specifically designed for NA cars converted to FI to provided a multitude of functions for that purpose

high resolution boost control
boost control fail safes
scramble boost control
launch boost control
spool boost control
gear change boost control (DSG transmission only)
water/meth control
nitrous control
true boost by gear control


but that’s just like you, the same as when you cursed God and his whole creation, melting down like a child, not any more advanced or wiser today than you were back then.
.

I have boost by gear myself... in the sense that anything under 3rd gear doesn't use boost past the minimum I get by spring pressure. Given how little or how much a renesis can take, this is perfectly fine... and an arduino + mcp2515 shield +chatgpt + one of those UIM solenoids can handle this.

Buddy you have a melt down on this forum at least once a week. You're having one right now, because of a lighthearted joke. Do you really think I was expecting you to send me anything?

You were having one before because no one was responding to your product suggestion, and Brettus had to coddle you like a child "Yes, yes, it was a good suggestion, I heard you ;)" *pats Team's head*.

No, I would not actually accept anything from you free or otherwise, mostly because I don't give insane people my address.

Unless...you are going to send me this definitely not a boost controller that controls boost...?

brb guys gonna go open a post office box

it’s all in there on that website

https://sirhclabs.com/product/can-bu...rpm-interface/

.