Nemesis8

iTrader: (3)

Damn, I too far away:

Total Distance: 776.7 Miles Estimated Total Time: 11 hours, 45 minutes

I have a couple of freinds in SF, so if this looks promising, I'd rather make the drive to Danville than to Largo, Florida which is:

Total Distance: 3209.5 Miles Estimated Total Time: 47 hours, 58 minutes

Keep us posted

Tigster

I think the old saying "if you build it they will come" applys. I know alot of people will like to see the results, I just saw the Tuner Transformation where you did a Blue EVO 8 and I was impressed when he said he had hooked up the piggyback in I believe 55 seconds? The build quality of your stuff that I have seen on EVO's have been first class. Hopefully everything will work out great and it will allow more ECU options for the 8 owner. Competition is always welcome when it comes to MODs.

Pololo_RX8

I believe I was one of the first ones to PM Shiv and volunteer my car but no responses...Oh well... No big deal...

I can't wait to see what he has developed for our 8's

He did wonders for the Miata... now it's the RX8 turn.

Good luck,
Carlos

G8rboy

Completely off topic, but is this the same Shiv that used to have a turbo'd Miata (Frankenstein?) on the Miata.net list in the 90's?

wedge357

bump...

cleoent

you dont have to bump a thread that has only had 35 minutes since it's last reply ha ha ha

Pololo_RX8

Shiv is "the guy" when comes to tuning Miatas...

He was around Miatas for a while then I believe he got "sidetracked" by Subies and EVOs...

I am glad he has seen the light again with Mazdas... :D

Carlos
ps. definitely waiting for this new XEDE piggyback...

Hornet

I'm glad to see Shiv here! I remember when he first showed up on the scene tuning the Evo! Boy did some people give him a hard time (mostly due to his dyno and him being more established as a Suby tuner). I'm glad to see him taking an interest in the 8 and I'm confident that whatever he comes up with for us will be top notch and reliable. I didn't get a chance to buy any Vishnu products for my Evo but hopefully all goes well and I get a chance to experience it in my 8.

rotarygod

Anyone willing to help the RX-8 crowd, regardless of what other cars they work on, has my support.

FWIW: The aftermarket Mustang crowd can already reflash their stock ecu's on the new cars. They use a system that is very close to the RX-8.

Xyntax

^ That must be nice. Domestic cars have a lot of support from US chip companies, and that's probably why they have that hack sorted out already. I wish our RX-8s had the same support.

Nemesis8

iTrader: (3)

^ It seems that the Italian's managed to hack the ECU of the RX-8, but we have not seen that technology come over here yet.

zoom44

this is my new thing. i am going to make this happen one way or another. talked to dan last night. going to talk to some more folks this next week. i have a plan. stock ecu on the new mustang was a little easier since its a powerpc motorola unit. but we really arent that far off

twospoons_

Not sure I want my stock ECU reprogrammed. Whenever there is a new flash with something else updated it seems it would be hard to figure out which parts you need to flash with your new stuff.

Unless you can pull down the entire new memory down and just do updates to the fuel maps and such and then pump it back in.

What seems to be the problem? Is it encrypted? Is it just possible to write to the ECU and not read the ECU data?

/twospoons

zoom44

dont want to get too far into it in this thread since this is very preliminary but yes thats it really.

zoom44

now i just need a little cash and a way to keep the wife from killing me before i get this doen

and all apologies to shiv for taking thread off track very sorry.

N20SA22C

I cant wait for this. The ECU has no idea the Xede is there, as it is after ECU itself in the wiring. I have been following his progress with the Mazdaspeed MX-5 (which my wife has) and he picked up almost 50whp with intake/Xede at almost exactly factory boost levels. Just sorted out mazdas funky tuning strategy. I need a package deal please!

Kyle Lancaster

Shiv@Vishnu

Hi guys,
I just tested the XEDE in a forum member's stock RX-8. The car was equipped with the latest factory flash/update just last week. It baselined at a repeatable 176whp.

Then I installed the XEDE which took about 30 seconds (plug in harness). After 2 hours of tuning, the most I could pick up was 6-7whp with most of the gains between 7500 and 9000rpm. The car, much to my surprise, was very insensitive to fuel enleanment. Even leaning it out to 13:1 (from 12.3:1) at 8000rpm was only worth a few hp. Adding in timing advance also yield small gains. I added up to 2 degrees and only found 1hp or so. I monitored basic parameters during the dyno runs (timing, coolant temp, etc,.) to make sure that everything was stable during the pulls. And it was. Just not the gains that we were hoping for. At least on an otherwise stock car. I have read reports of people picking up substantial gains just through fuel tuning. For whatever reason, I wasn't able to do the same. Oh well. Maybe the gains will be more substantial on a more modified car. Only time will tell. Big thanks to the forum member to graciously loaned us his beautiful car!

Cheers,
shiv

HardHitter

Not the news we wanted to hear and probably not the results you expected to see. With this done, we can only wait and see how the guys in Florida did with their Interceptor-X.

I just wanted to thank you Shiv for taking the time to help out the car and to the one who loaned Shiv the car to play with.

colin204

Thanks for being honest, being that this was your first try don't give up. Anybody want to loan them a more modified car to try?

Will you continue with the project?

Psylence

I think I just died a little inside...

brillo

Shiv,

so you advanced the timing from the 26-30 at WOT at the top end to something in the 32 range? Did you try retarding it at all?

at WOT, my call will go into the high 11's in terms of AFR, I'm guessing that your wideband only showed low 12's from your post.

even if there isn't a huge hp gain, a leaner burn would be nice for fuel economy.

Shiv@Vishnu

I tried both advancing 2 degrees everywhere and retarding up to 1 degree at high rpm where the power curve would start to get a little dirty. I enleaned fueling several percent, bringin nominal AFR (measured at the tailpipe unfortunately) to 13:1 or a bit leaner. The changes to power output was nominal regardless of what I tried. I suppose I could have been even more agressive but with my mapping changes inducing such little change in output, it was clear that we weren't going to get the power gains that others have suggested.

Shiv

brillo

well, reguardless, at least you have another ECU option for the turbo/super charger folks.

r0tor

iTrader: (1)

did you happen to monitor the absolute position of the throttle during the run (not of the pedal), and make sure the coolant and cat temps where at a normal operating range? For some reason I still think some cars aren't taking to being on a dyno very well as I fail to believe there can be a 20+ rwhp difference between cars.


Anyway, if you have another chance I did make significantly more power going from a 13.0 to ~13.5 afr ratio and adding up to 3-4 degrees of advance when I was tuning my greddy. I seemed to get about 10hp at 13.0 and closer to 20hp at 13.5.

I believe the UNi-Chip unit also shoots for a 13.5 afr FWIW with the stock ignition advance.

Xyntax

Shiv, did you try adding advance first to see how the Renesis responds? If adding to sum of 44 degrees still doesn't lean it out over 13:1, then start reducing fuel slowly. That was my approach in tuning, which resulted to this: https://www.rx8club.com/series-i-tech-garage-22/145-188-rwhp-mustang-dyno-70398/

Just a suggestion...