AccessPORT Alpha test started
#626
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The NVRAM in the Denso PCM is actually rated to tens of thousands of flashes by the manufacturer.
Denso rates it lower because they have OE liability to take into account.
You will never reach the flash limit of your PCM.
As I explained earlier, I provide three "flavors" of flash - N/A, turbo and supercharged - each of which comes in three "levels" like what people call "stages", each progressively more aggressive.
You would select the lowest level flash that corresponds to your setup and model year and load it.
Then you drive around for a while and observe your fuel trims.
After they have established, you select the appropriate "adjustment" flash in the same group as the one you have loaded that negates the fuel trim and you drive again for verification.
Then, you would work your way up to maximum load on the engine, verifying that there are no stumbles or other issues.
Then, if you are feeling randy and you hate your CAT, you would move up to "level 2" and then "level 3" for more power.
Denso rates it lower because they have OE liability to take into account.
You will never reach the flash limit of your PCM.
As I explained earlier, I provide three "flavors" of flash - N/A, turbo and supercharged - each of which comes in three "levels" like what people call "stages", each progressively more aggressive.
You would select the lowest level flash that corresponds to your setup and model year and load it.
Then you drive around for a while and observe your fuel trims.
After they have established, you select the appropriate "adjustment" flash in the same group as the one you have loaded that negates the fuel trim and you drive again for verification.
Then, you would work your way up to maximum load on the engine, verifying that there are no stumbles or other issues.
Then, if you are feeling randy and you hate your CAT, you would move up to "level 2" and then "level 3" for more power.
#628
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It was already posted earlier, but I believe the manufacturer of the ECU thought it would only be good for a few hundred flashes, but apparently Cobb believes it is somewhere closer to a few thousand.
When you flash the ECU, it's just altering some kind of solid state memory right? Does it affect the "processing" ability of the ECU at all? I'm assuming the ECU has a processor?? What I'm getting at is if it would be possible that after a lot of flashes the ECU could start to slow down and be less responsive? or is it something like the memory starts degrading after so many flashes? Would it be something you'd notice gradually or just all of the sudden, you flash one too times and your ecu is just fried?
When you flash the ECU, it's just altering some kind of solid state memory right? Does it affect the "processing" ability of the ECU at all? I'm assuming the ECU has a processor?? What I'm getting at is if it would be possible that after a lot of flashes the ECU could start to slow down and be less responsive? or is it something like the memory starts degrading after so many flashes? Would it be something you'd notice gradually or just all of the sudden, you flash one too times and your ecu is just fried?
#629
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I don't know, really.
I'm going to get some cars on the dyno next week, so I will have some data.
However, they won't be "maximum power" type things.
I'm just looking for improvement and relative differences in tuning levels.
I would imagine that there will be a flood of dyno data once people start taking delivery of these things.
The first wave of orders will go out on Wednesday.
I'd say, start looking for dynos on Friday!
I'm going to get some cars on the dyno next week, so I will have some data.
However, they won't be "maximum power" type things.
I'm just looking for improvement and relative differences in tuning levels.
I would imagine that there will be a flood of dyno data once people start taking delivery of these things.
The first wave of orders will go out on Wednesday.
I'd say, start looking for dynos on Friday!
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I don't know, really.
I'm going to get some cars on the dyno next week, so I will have some data.
However, they won't be "maximum power" type things.
I'm just looking for improvement and relative differences in tuning levels.
I would imagine that there will be a flood of dyno data once people start taking delivery of these things.
The first wave of orders will go out on Wednesday.
I'd say, start looking for dynos on Friday!
I'm going to get some cars on the dyno next week, so I will have some data.
However, they won't be "maximum power" type things.
I'm just looking for improvement and relative differences in tuning levels.
I would imagine that there will be a flood of dyno data once people start taking delivery of these things.
The first wave of orders will go out on Wednesday.
I'd say, start looking for dynos on Friday!
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Then you drive around for a while and observe your fuel trims.
After they have established, you select the appropriate "adjustment" flash in the same group as the one you have loaded that negates the fuel trim and you drive again for verification.
Then, you would work your way up to maximum load on the engine, verifying that there are no stumbles or other issues.
After they have established, you select the appropriate "adjustment" flash in the same group as the one you have loaded that negates the fuel trim and you drive again for verification.
Then, you would work your way up to maximum load on the engine, verifying that there are no stumbles or other issues.
If you're including a faq sheet with answers to these types of questions, then disregard my question.
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For instance like if fuel trim x is above x% move on to map with x variables.
Just because for me I have no idea. Could a day dedicated to finding the right map do it, or are these trims built over weeks??
Just imagine writing it for a second grader, and I suspect that would do.
#636
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good explanation, Charles.
I rather have just enough at my disposal to get my car running smoothly and let someone who knows more about it to do the fine tuning. having all of it on hand means one will think they can do it for themselves, whether they are competent or not.
I rather have just enough at my disposal to get my car running smoothly and let someone who knows more about it to do the fine tuning. having all of it on hand means one will think they can do it for themselves, whether they are competent or not.
#637
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The Accessport seems like it could be a good alternative to the INT-X but without the tuning software it would not be worth it. Probably work ok on N/A cars, but if the car is turbo'd you would need the software for tuning. I do not recommend "Map Slapping" on a turbo car and especially a rotary. I have seen to many blown motors because of that.
Jason
Jason
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CRH: This is why I like the concept of devices like the access port, have the professionals design the map, and hopefully one would beable to load one and not worry about having to learn how to tune. I'd assume the maps would have some sort of 'safety buffer' associated with them.
#639
RX7store.net
The only saftey buffer would be for a rich tune with pulled timing. That is ok and safe, but you could be leaving 50HP on the table doing it like that. Unless the Accessport uses knock detection or montiors A/F's constantly. I dont know enough about it, but I assume not.
#640
The Accessport seems like it could be a good alternative to the INT-X but without the tuning software it would not be worth it. Probably work ok on N/A cars, but if the car is turbo'd you would need the software for tuning. I do not recommend "Map Slapping" on a turbo car and especially a rotary. I have seen to many blown motors because of that. Jason
Regardless, if phrases such as epitrochoidal chamber pressure, Lambda, ignition separation, throttle-by-wire etc. are unfamiliar to you. As CHR, MM, and others have suggested, completing extensive research prior to thinking about tuning your own Renesis engine would be good, and necessary advise.
Take care,
Christian.
Last edited by Christian.; 03-09-2008 at 02:25 PM.
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Better safe than sorry.
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Thanks for the input CRH, Christian, MM, and others I have missed. Myself, I'm definitely more than willing to let other vastly more knowledgeable folks tune my car. I know that while I would potentially buy the software just for investigative purposes, I by no means have the smarts or the guts to try and build my own map.
And as MM pointed out previously, as I've discovered over the past week and change, the AP is a great driveability mod. I'm looking forward to some modest mods in the future to help the car out a wee bit more. On a side note, our local Mazda club had a Dyno Day yesterday at the same shop where I did my runs. None of them tested higher than my stock 8 (170hp prior to installing the AP). They all had CAIs on their cars.
And as MM pointed out previously, as I've discovered over the past week and change, the AP is a great driveability mod. I'm looking forward to some modest mods in the future to help the car out a wee bit more. On a side note, our local Mazda club had a Dyno Day yesterday at the same shop where I did my runs. None of them tested higher than my stock 8 (170hp prior to installing the AP). They all had CAIs on their cars.
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good explanation, Charles.
I rather have just enough at my disposal to get my car running smoothly and let someone who knows more about it to do the fine tuning. having all of it on hand means one will think they can do it for themselves, whether they are competent or not.
I rather have just enough at my disposal to get my car running smoothly and let someone who knows more about it to do the fine tuning. having all of it on hand means one will think they can do it for themselves, whether they are competent or not.
#644
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#645
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Hmm... actually all I wanted was a clarification of MM's directions earlier. But I guess it's for people that have more experience with tuning. In that case, I'll happily just "slap on" Cobb's standard stage 1 for the moment and after reading more about ... um.. the above lingo, I'll move on to selecting which one of MM's maps to use.
#647
I plan on getting dyno numbers on Friday if possible. But I also want to make sure there is enough time to pick the proper map on the accessport. Jeff, how long does it take to find out if the LTFT suggests a map change is required? Would it even matter since on the dyno the runs are WOT?
#648
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I would play with it a while on the street.
Fuel trims set pretty quickly.
For the purposes of selecting the proper flash, you only need to get the low-end trim, and you can get it pretty close by just looking at the STFT around idle and low load, which is instantaneous.
For the purpose of a dyno run, it probably won't matter a whole bunch, but the power in the lower RPMs will increase a bit over time as the trims get settled.
Fuel trims set pretty quickly.
For the purposes of selecting the proper flash, you only need to get the low-end trim, and you can get it pretty close by just looking at the STFT around idle and low load, which is instantaneous.
For the purpose of a dyno run, it probably won't matter a whole bunch, but the power in the lower RPMs will increase a bit over time as the trims get settled.
#649
I am dying to know if the AP will work for Canadian models.
I am almost willing to buy the AP anyways and if it does not work, simply buy a USDM pcm for my car to make it work.
I am currently driving my car without any EMS. It drives like stock but not very fun to drive like a granny!
I am almost willing to buy the AP anyways and if it does not work, simply buy a USDM pcm for my car to make it work.
I am currently driving my car without any EMS. It drives like stock but not very fun to drive like a granny!
Last edited by turborx8; 03-10-2008 at 01:20 PM.