Osiris from Uprev
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Joined: Sep 2005
Posts: 180
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From: Spain
Originally Posted by App6MT
Great question.
So ECU's are no longer ROMs, much like back in the day where tuners would actually have to replace the entire ROM chip with something they burned in. Our ECU is a flash based memory so you can write to it. How many times could be speculated. I am not certain of the material composite but if it is something similar to a USB flash device, then you'll never saturate the cells.
The great thing about Osiris is that it does allow real time tuning off of your laptop. You can save this tune like any normal file and come back to it if you still want to work on it. UpRev actually recommends this is you are doing a lot of tuning so you minimize the total number of ECU flashes.
With that said, I know the guys at UpRev have flashed a single ECU hundreds of time so it can be assumed that it is pretty safe.
So ECU's are no longer ROMs, much like back in the day where tuners would actually have to replace the entire ROM chip with something they burned in. Our ECU is a flash based memory so you can write to it. How many times could be speculated. I am not certain of the material composite but if it is something similar to a USB flash device, then you'll never saturate the cells.
The great thing about Osiris is that it does allow real time tuning off of your laptop. You can save this tune like any normal file and come back to it if you still want to work on it. UpRev actually recommends this is you are doing a lot of tuning so you minimize the total number of ECU flashes.
With that said, I know the guys at UpRev have flashed a single ECU hundreds of time so it can be assumed that it is pretty safe.
I know that that today you don't have to flash a ROM chip, but is certain that a non volatile memory exist in the ECU (if you unplug the battery you don't loose the data), and also is true, that this memory was not thought for be flashed several times...any way nowadays, the solid state memories (like USBs) are cheap, so it's possible that maybe the ECU uses some kind of this memory.
Please Uprev, iluminate us!!!!
Originally Posted by raditz
And for the process of tuning maps, can you change what ever you want in the RAM of the ECU (without flashing),or certain options are only modificable throught flashing the ROM? is there any limit in the numeber of flashes allowed by the stock ECU?
We tune in RAM, then you save that file and flash the ROM. It's the only way to do it.
We don't have exact numbers on how many flashes the ROM will handle and we don't support flashing it daily, we'd rather be safe than sorry.
For the guys that don't have cruise control, they are forced to flash it any time they want to switch maps so it is then similar to buying or competitors product, but then again you can always wire up cruise control and use map switching. The stock ECUs have cruise control built in, if you don't have it on your car that just means the switches and wiring is missing... go find the diagrams
Originally Posted by UpRev
For the guys that don't have cruise control, they are forced to flash it any time they want to switch maps so it is then similar to buying or competitors product, but then again you can always wire up cruise control and use map switching. The stock ECUs have cruise control built in, if you don't have it on your car that just means the switches and wiring is missing... go find the diagrams
Ok, I installed the flash but it made no difference on my cranking/start up.. The start up was better but still had to mash the throttle to start up or id get misfire code.... 
I cleared the code with the cipher.... What now Uprev?? Do i send you the flash back to try something else?
I cleared the code with the cipher.... What now Uprev?? Do i send you the flash back to try something else?
Last edited by Jay'Z; Jun 24, 2008 at 09:46 AM.
Registered User
Joined: Sep 2005
Posts: 180
Likes: 0
From: Spain
Originally Posted by UpRev
We tune in RAM, then you save that file and flash the ROM. It's the only way to do it.
We don't have exact numbers on how many flashes the ROM will handle and we don't support flashing it daily, we'd rather be safe than sorry.
For the guys that don't have cruise control, they are forced to flash it any time they want to switch maps so it is then similar to buying or competitors product, but then again you can always wire up cruise control and use map switching. The stock ECUs have cruise control built in, if you don't have it on your car that just means the switches and wiring is missing... go find the diagrams
We don't have exact numbers on how many flashes the ROM will handle and we don't support flashing it daily, we'd rather be safe than sorry.
For the guys that don't have cruise control, they are forced to flash it any time they want to switch maps so it is then similar to buying or competitors product, but then again you can always wire up cruise control and use map switching. The stock ECUs have cruise control built in, if you don't have it on your car that just means the switches and wiring is missing... go find the diagrams
I suppose that with a laptop you could load in the ECU RAM what ever map you want without the need of flashing the ROM (maybe for a track day)
Originally Posted by raditz
When you are tuning on RAM and you don't flash the ROM when is all the data loss, at the next engine stop or only if the battery fails?
I suppose that with a laptop you could load in the ECU RAM what ever map you want without the need of flashing the ROM (maybe for a track day)
I suppose that with a laptop you could load in the ECU RAM what ever map you want without the need of flashing the ROM (maybe for a track day)
Originally Posted by Jay'Z
Ok, I installed the flash but it made no difference on my cranking/start up.. The start up was better but still had to mash the throttle to start up or id get misfire code....
I cleared the code with the cipher.... What now Uprev?? Do i send you the flash back to try something else?
I cleared the code with the cipher.... What now Uprev?? Do i send you the flash back to try something else?
Originally Posted by Jay'Z
^^Prob not going to happen, James never called me back.... Im frustrated with this purchase because i was led to believe your flash would fix my start up issues and it hasnt one bit.. Prob just going to mail the stuff back..
Originally Posted by Jay'Z
BTW i would PM you but that is disabled on your account..
Yeah I did that because people PM me and think that I get a chance to check it every day, and then they get upset because I only log on here every few days. Give me a call at the shop, Jared is knee deep in some updates working on Ver2.0 right now.