Yes, I have a high very amp one too yet still only 11 lbs., came to the conclusion a long time ago that a small battery isn’t a good idea in an RX8

oversized Speedsource pulleys too with a 1000 rpm idle to keep charging voltage up, alternator was under 12V output at factory idle speed

funny thing is on the alternator parts; an entire brand new alternator assembly is $392 racer cost, but the price for the rear aluminum outer body housing (W51) only is $590!!! Seems a bit dumb ...

.

 

Hey,
How's your race going?

 

did track event this past weekend with the big battery. the frequency of engine cut off was reduced a lot but i still had two session (out of 9) where the engine cut off once in session. before i was getting engine cut off a few times every session. my voltage is around 13.9-14.0 at idle and 14.1-14.2 above 2k

 

Nice to heard the issue improve !!!

Wonder how many mile is on ur engine harness ?
Have u consider swap harness .........

 

i purchased the car with 70k miles two years ago. it's at 79k miles now. i pulled an engine harness out of a parts car months ago, i would not want to do that with a running car, it's a massive amount of work.

i reviewed my AiM video last night and saw that it lost ecu connections mid way through every session over the weekend. i should have tried to kept that unplugged from the obd2.

 

I tried return car to stock and reinstall VT and flash a tune. No cut off these days. But since it gets a lot colder, I see a significant increase in my alternator output, 13.5 avg to 14+

 

Perhaps you’re barking up the wrong tree; alternator output and battery output are not the same thing.

 

Just happened again.
I was trying to double clutch and downshift, when I stepped on gas (while clutch pedal is being pushed) it's not revving but oil pressure swipped back and the tacho dropped. Happened several times before, just like they said, it might be their launch control.

 

Well if you’re not using that then perhaps they can offer a version that either eliminates or blocks it from working if not option selected.

 

i dont have launch control or no lift shift enable. i do have to two DTC code disabled for secondary air injection since i removed the pump, P0140 and P0411.

 

Thats what they said, I am still waiting for that.

I have neither those enabled and I also have those 2 code but I did not disable them. Whether masking DTC, from what I experience these days, won't impact engine cut off, I specifically test this. The launch control, although not enable, can still confilct with some functions conflicts, according to VT.

 

VT just send me a beta version that does not include launch control. You can email them for one. Either Steve or Ugnius.

 

let me know if the beta version works out. i have another track event in two weeks and can test it out on track.

 

Flashed. She's my daily driver. I'll let you know if that works out soon.

 

any update on the new beta map?

 

Everything is pretty normal. Did several long trip include extended WOT, speed up to 130MPH, no cut off at all.
It's just I am getting some misfires , happened before ,no power loss, pretty normal.

 

i've been dealing with misfire for awhile too. went to LS coils which didn't fix it so i went back to oem coils. no misfire while driving on street, just on track under high load.

 

i messaged Steve about trying the beta map last week and didnt hear anything back. still working good for you?

 

Still no sign of any problem. Did a pull today. 1 and 2nd gear WOT all the way to redline, everything is normal.

 

that sounds promising. too bad i wont have it to try out at my last track event this weekend. car will be in hibernation until march or april.

 

i guessing your issue is fixed now that you've had more time to drive the car? i still haven't heard anything back from Steve after messaging him. but i my car will be in hibernation till March.

 

Still working pretty good, not a single cut off. It's my daily driver but a lot of sprit driving.

 

The cut off happens to my last track day too
I was using versatune to disable a CEL right before my session start , u can see on 4:14 mark
The engine just cut off along with my TPS signal

 

im glad im not the only one. i've been trying to chase down this issue for two years. wasted time and money replacing parts that didn't need to replace. and lost races because of it. only reason i went with VT over mazdaedit was because they said they would be working on flexfuel capabilities. i dont see that happening anytime soon. i'll probably switch to mazdaedit next season if this is not fixed.

 

This cut off only happend this time on track
I been using their software for 3 track day already , only this time happens more

It happens when I street tune it , right after fresh
Mabe let's why they suggest to drive gententale
For 20min , to stable the ecm