Possible ECU Remapping for IS250/350?
11-07-14, 04:56 PM
#241
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I did some research on their tunes on vw, bmw, and porsche and they seem to be legit. Im still uneasy about the fact that they just squeezed 25 HP out of the IS350
11-07-14, 05:19 PM
#243
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lexus must have left a lot on the table with the tunning, which i dont doubt !
11-08-14, 07:16 AM
#245
So who's ordered one?
You don't necessarily have to dyno the car. A before and after visit to the 1/4 mile track would suffice and be alot cheaper.
Then again with the claimed numbers, you should be able to feel a difference on the butt dyno
You don't necessarily have to dyno the car. A before and after visit to the 1/4 mile track would suffice and be alot cheaper.
Then again with the claimed numbers, you should be able to feel a difference on the butt dyno
11-08-14, 10:28 AM
#248
Tech Info Resource
iTrader: (2)
Merge completed.
As far as Vivid's offering, first of all, it's not a reflash. It's software intercepting the OBDII data and replacing it with more aggressive numbers to take out some of the factory's "room for error" designed in to ensure their engines do not blow up because the owner put in bad fuel or because a vacuum line cracked and leaked to lean out the engine. Toyota is super conservative, and anyone who has monitored what the OEM ECM does in service knows they run super rich in open loop at WOT. Apparently this device will spoof the ECM into believing there is less air going into the engine and adjust the O2 signals so it falls in the realm of acceptable limits because both of these parameters are measured and monitored by Toyota's ECM software. If the values fall outside of expectations, the ECM takes action to correct (and anyone who has attempted to tune a Toyota ECM with a piggyback in the last 25 years has run into this problem).
Vivid is far from first in this space, but appear to be first offering something for the 2GR/4GR engines. If you look at the sad history of the attempts to tune the 2UR-GSE in the IS F forum, you'll see a manufacturer in SoCal claiming to be able to do this a couple of years ago, claimed they were just working on packaging, then disappeared from sight.
If this works for more than one car, it will make history. There is zero hope of a reflash unless it is done by SARD, iCode, or Novel, and we already know they want what appears to be a king's ransom for their work (at least compared to any other manufacturer's tune). Then again, if no one else can do what you do, you can pretty much name your price.
As far as Vivid's offering, first of all, it's not a reflash. It's software intercepting the OBDII data and replacing it with more aggressive numbers to take out some of the factory's "room for error" designed in to ensure their engines do not blow up because the owner put in bad fuel or because a vacuum line cracked and leaked to lean out the engine. Toyota is super conservative, and anyone who has monitored what the OEM ECM does in service knows they run super rich in open loop at WOT. Apparently this device will spoof the ECM into believing there is less air going into the engine and adjust the O2 signals so it falls in the realm of acceptable limits because both of these parameters are measured and monitored by Toyota's ECM software. If the values fall outside of expectations, the ECM takes action to correct (and anyone who has attempted to tune a Toyota ECM with a piggyback in the last 25 years has run into this problem).
Vivid is far from first in this space, but appear to be first offering something for the 2GR/4GR engines. If you look at the sad history of the attempts to tune the 2UR-GSE in the IS F forum, you'll see a manufacturer in SoCal claiming to be able to do this a couple of years ago, claimed they were just working on packaging, then disappeared from sight.
If this works for more than one car, it will make history. There is zero hope of a reflash unless it is done by SARD, iCode, or Novel, and we already know they want what appears to be a king's ransom for their work (at least compared to any other manufacturer's tune). Then again, if no one else can do what you do, you can pretty much name your price.
Last edited by lobuxracer; 11-08-14 at 10:34 AM.
11-08-14, 09:09 PM
#249
Merge completed.
As far as Vivid's offering, first of all, it's not a reflash. It's software intercepting the OBDII data and replacing it with more aggressive numbers to take out some of the factory's "room for error" designed in to ensure their engines do not blow up because the owner put in bad fuel or because a vacuum line cracked and leaked to lean out the engine. Toyota is super conservative, and anyone who has monitored what the OEM ECM does in service knows they run super rich in open loop at WOT. Apparently this device will spoof the ECM into believing there is less air going into the engine and adjust the O2 signals so it falls in the realm of acceptable limits because both of these parameters are measured and monitored by Toyota's ECM software. If the values fall outside of expectations, the ECM takes action to correct (and anyone who has attempted to tune a Toyota ECM with a piggyback in the last 25 years has run into this problem).
Vivid is far from first in this space, but appear to be first offering something for the 2GR/4GR engines. If you look at the sad history of the attempts to tune the 2UR-GSE in the IS F forum, you'll see a manufacturer in SoCal claiming to be able to do this a couple of years ago, claimed they were just working on packaging, then disappeared from sight.
If this works for more than one car, it will make history. There is zero hope of a reflash unless it is done by SARD, iCode, or Novel, and we already know they want what appears to be a king's ransom for their work (at least compared to any other manufacturer's tune). Then again, if no one else can do what you do, you can pretty much name your price.
As far as Vivid's offering, first of all, it's not a reflash. It's software intercepting the OBDII data and replacing it with more aggressive numbers to take out some of the factory's "room for error" designed in to ensure their engines do not blow up because the owner put in bad fuel or because a vacuum line cracked and leaked to lean out the engine. Toyota is super conservative, and anyone who has monitored what the OEM ECM does in service knows they run super rich in open loop at WOT. Apparently this device will spoof the ECM into believing there is less air going into the engine and adjust the O2 signals so it falls in the realm of acceptable limits because both of these parameters are measured and monitored by Toyota's ECM software. If the values fall outside of expectations, the ECM takes action to correct (and anyone who has attempted to tune a Toyota ECM with a piggyback in the last 25 years has run into this problem).
Vivid is far from first in this space, but appear to be first offering something for the 2GR/4GR engines. If you look at the sad history of the attempts to tune the 2UR-GSE in the IS F forum, you'll see a manufacturer in SoCal claiming to be able to do this a couple of years ago, claimed they were just working on packaging, then disappeared from sight.
If this works for more than one car, it will make history. There is zero hope of a reflash unless it is done by SARD, iCode, or Novel, and we already know they want what appears to be a king's ransom for their work (at least compared to any other manufacturer's tune). Then again, if no one else can do what you do, you can pretty much name your price.
Would you consider buying it for your IS-F if it turns out be compatible?
11-09-14, 09:12 AM
#250
Merge completed.
As far as Vivid's offering, first of all, it's not a reflash. It's software intercepting the OBDII data and replacing it with more aggressive numbers to take out some of the factory's "room for error" designed in to ensure their engines do not blow up because the owner put in bad fuel or because a vacuum line cracked and leaked to lean out the engine. Toyota is super conservative, and anyone who has monitored what the OEM ECM does in service knows they run super rich in open loop at WOT. Apparently this device will spoof the ECM into believing there is less air going into the engine and adjust the O2 signals so it falls in the realm of acceptable limits because both of these parameters are measured and monitored by Toyota's ECM software. If the values fall outside of expectations, the ECM takes action to correct (and anyone who has attempted to tune a Toyota ECM with a piggyback in the last 25 years has run into this problem).
Vivid is far from first in this space, but appear to be first offering something for the 2GR/4GR engines. If you look at the sad history of the attempts to tune the 2UR-GSE in the IS F forum, you'll see a manufacturer in SoCal claiming to be able to do this a couple of years ago, claimed they were just working on packaging, then disappeared from sight.
If this works for more than one car, it will make history. There is zero hope of a reflash unless it is done by SARD, iCode, or Novel, and we already know they want what appears to be a king's ransom for their work (at least compared to any other manufacturer's tune). Then again, if no one else can do what you do, you can pretty much name your price.
As far as Vivid's offering, first of all, it's not a reflash. It's software intercepting the OBDII data and replacing it with more aggressive numbers to take out some of the factory's "room for error" designed in to ensure their engines do not blow up because the owner put in bad fuel or because a vacuum line cracked and leaked to lean out the engine. Toyota is super conservative, and anyone who has monitored what the OEM ECM does in service knows they run super rich in open loop at WOT. Apparently this device will spoof the ECM into believing there is less air going into the engine and adjust the O2 signals so it falls in the realm of acceptable limits because both of these parameters are measured and monitored by Toyota's ECM software. If the values fall outside of expectations, the ECM takes action to correct (and anyone who has attempted to tune a Toyota ECM with a piggyback in the last 25 years has run into this problem).
Vivid is far from first in this space, but appear to be first offering something for the 2GR/4GR engines. If you look at the sad history of the attempts to tune the 2UR-GSE in the IS F forum, you'll see a manufacturer in SoCal claiming to be able to do this a couple of years ago, claimed they were just working on packaging, then disappeared from sight.
If this works for more than one car, it will make history. There is zero hope of a reflash unless it is done by SARD, iCode, or Novel, and we already know they want what appears to be a king's ransom for their work (at least compared to any other manufacturer's tune). Then again, if no one else can do what you do, you can pretty much name your price.
11-09-14, 09:21 AM
#251
The problem I see is that this is not permanent and therefore the changes the VR product makes will eventually be corrected by the computer. The computer will eventually correct everything back to the way it was. So now you run into the question of how often are you plugging this thing in and "flashing" it. And is it going to work the same every time. I'll be anxious to see how it works for someone 5000+ miles after the "flash" and then doing another dyno to compare if the car corrected itself.
I think the idea was that in theory, for it to work it would have to stay within the specs that the ECU likes to see.
Let's take AFR as a loose hypothetical. let's say you're hitting 12.5 @ redline at WOT stock. The ECU is programmed to pull timing at 13, and until then just try and correct with fuel. A chip that works would feed the ECU 12.99, thus getting it to dump more fuel to correct it, making more power, but preventing it from pulling timing and losing power.
The ECU would never consider the idea of "tuning it out" because you never crossed the threshold that it would take to cause those changes. Aka "using maps that are already built into the stock ECU".
11-09-14, 09:59 AM
#252
Tech Info Resource
iTrader: (2)
I think the idea was that in theory, for it to work it would have to stay within the specs that the ECU likes to see.
Let's take AFR as a loose hypothetical. let's say you're hitting 12.5 @ redline at WOT stock. The ECU is programmed to pull timing at 13, and until then just try and correct with fuel. A chip that works would feed the ECU 12.99, thus getting it to dump more fuel to correct it, making more power, but preventing it from pulling timing and losing power.
The ECU would never consider the idea of "tuning it out" because you never crossed the threshold that it would take to cause those changes. Aka "using maps that are already built into the stock ECU".
Let's take AFR as a loose hypothetical. let's say you're hitting 12.5 @ redline at WOT stock. The ECU is programmed to pull timing at 13, and until then just try and correct with fuel. A chip that works would feed the ECU 12.99, thus getting it to dump more fuel to correct it, making more power, but preventing it from pulling timing and losing power.
The ECU would never consider the idea of "tuning it out" because you never crossed the threshold that it would take to cause those changes. Aka "using maps that are already built into the stock ECU".
11-09-14, 03:48 PM
#253
Sort of. The ECM does not look at O2 data when the throttle is 74% or greater. It arbitrarily applies LT fuel trim to the maps built by Toyota. If your OBDII tool sees throttle over 74%, then alters MAF data so it hits a lower value in the table for a leaner AFR. The ECM will still apply LT trim, but it should do this regardless. The real trick is adjusting the MAF data so you don't go too lean and cause knock (which will instantly retard ignition timing and dump fuel). None of this will impact ST or LT because it doesn't begin to alter anything until it sees what the ECM considers WOT (>74% throttle opening). So there won't be a learning adjustment as long as the unit does not try to trim part throttle.
