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Old 03-15-2018, 10:32 PM #61
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Would be nice if we can get some real dyno numbers to see if there really is a HP bump. When funds permit I will do this with either the TRD or AFE intake. Haven't decided which one I want.
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Old 03-16-2018, 08:13 AM #62
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Would be nice if we can get some real dyno numbers to see if there really is a HP bump. When funds permit I will do this with either the TRD or AFE intake. Haven't decided which one I want.
Check/search the forum. At least two people completed before/after Dyno tests and documented results. There is a bump mostly (Minor) in HP
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Old 03-16-2018, 02:31 PM #63
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Sub'd!

I've read somewhere on this forum, a debate about using 87 vs 91 octane, and came to a conclusion that regardless of the fuel since the ecu is set for 87, putting in 91 will not improve anything.
I think some people also kept track of using 91 x amount of times and then 87 x amount of times and it was the same outcome. I know there are a lot of variables to this test but regardless they did it.

also that the toyota ecu has been fine tuned that if it was flashed it'll just revert back to oem specs.

ill try to find the thread sometime next week.

ill most likely email urd but if i went in to get serviced. if i just unplug the urd maf sensor and reconnect the stock would the ecu just go back to normal? or would i have to unplug the battery the night before with the stock plug inserted?
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Old 03-16-2018, 02:40 PM #64
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So yeah if it were flashed after the install or they ran a software update (that happens every year with Mercedes) then it would overwrite and revert back to oem/stock but for routine service you wouldn't need to do anything, if you wanted to you could ask the service guy if there are any updates coming with your service appointment... from what I have read (only owned a Toyota for 5 months and one service) software updates are rare, like every half decade rare on Toyotas, or at least on the 4Runner.
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Old 03-16-2018, 02:56 PM #65
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You guys are very confused...

This device has nothing to do with the ECU flash... It only modifies the signal the ECU gets from the MAF. It just so happens the MAF is a major factor in the ECU model.

Another comment about 91 vs lower octane..

The ECU is designed around high octane fuel to achieve the rated HP. It will detect knock and learn it and lower output by running less timing. It's that simple.
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Old 03-16-2018, 03:00 PM #66
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Originally Posted by wfo9 View Post
You guys are very confused...

This device has nothing to do with the ECU flash... It only modifies the signal the ECU gets from the MAF. It just so happens the MAF is a major factor in the ECU model.

Another comment about 91 vs lower octane..

The ECU is designed around high octane fuel to achieve the rated HP. It will detect knock and learn it and lower output by running less timing. It's that simple.
Right so the MAF talks to the ECU, and if you mess with the MAF it doesn't change the programming in the ECU. But (and it's a big butt) if you mess with the programing on the ECU.. i.e. a dealer updating the ECU wouldn't that reset the MAF, doesn't the ECU have the ability to do that? if no, then yeah, I am confused.
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Old 03-16-2018, 03:17 PM #67
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Originally Posted by jordanrb81 View Post
Right so the MAF talks to the ECU, and if you mess with the MAF it doesn't change the programming in the ECU. But (and it's a big butt) if you mess with the programing on the ECU.. i.e. a dealer updating the ECU wouldn't that reset the MAF, doesn't the ECU have the ability to do that? if no, then yeah, I am confused.
No The MAF does not change the "programming" of the ECU. It changes the result (timing and injector pulse) of the ECU applying its model/calculation.

The ECU is broken into 3 parts.
-The OS
-The Calibration
-The learned values (which is really just an extension of the calibration data)

The MAF input frequency, along with the RPM, Throttle position, and o2 feedback are the main inputs to the ECU. It also uses other things like wheel speed, yaw... but the first four are the main drivers.

It does a few lookups and calculations based on these inputs and comes up with injector timing, pulse width and spark timing. It can also advance and retard the cams and control the throttle blade.

Most people don't realize that the engine is highly governed by the ECU. There are many situations where the ECU purposefully limits output. On these trucks its very frequent. Plus Toyota just did a bad job overall with drivability on this particular model.
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Old 03-16-2018, 03:21 PM #68
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Quote:
Originally Posted by wfo9 View Post
No The MAF does not change the "programming" of the ECU. It changes the result (timing and injector pulse) of the ECU applying its model/calculation.

The ECU is broken into 3 parts.
-The OS
-The Calibration
-The learned values (which is really just an extension of the calibration data)

The MAF input frequency, along with the RPM, Throttle position, and o2 feedback are the main inputs to the ECU. It also uses other things like wheel speed, yaw... but the first four are the main drivers.

It does a few lookup and calculations based on these inputs.
NOPE, didn't say that. I said the MAF "talks" to the ECU as in sends data, not reprograms. but I am given to understand that the ECU can override the programming of the MAF. it's sort of like a subordinate piece of hardware. So as I understand it the ECU can reprogram the MAF, but not the other way around. 1 do you understand what I am tying to say 2 are you saying that is incorrect?

let me see if I can put this another way, I can go on my computer and mess with the programing of my tv, or I can go into my tv and mess with it's programming, but I cannot use my tv to mess with the programming of my computer. in this case the MAF is the tv and the ECU is the computer (well the ECU actually IS a computer, but still)

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Old 03-16-2018, 03:25 PM #69
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Originally Posted by jordanrb81 View Post
NOPE, didn't say that. I said the MAF "talks" to the ECU as in sends data, not reprograms. but I am given to understand that the ECU can override the programming of the MAF. it's sort of like a subordinate piece of hardware. So as I understand it the ECU can reprogram the MAF, but not the other way around. 1 do you understand what I am tying to say 2 are you saying that is incorrect?
No, the MAF is a sensor, No program in it. It uses a heated wire to maintain a temp. The amount of power to maintain the temp is reported to the ECU in either voltage or a frequency.

The URD maf calibrator adds a programmable translator in the middle.. but the ECU has no idea it is there.

The MAF calibrator is sort of a hack to trick the ECU. The ECU has an internal calibration curve for the MAF output that translates frequency/voltage to a mass airflow number.
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Old 03-16-2018, 03:28 PM #70
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Quote:
Originally Posted by wfo9 View Post
No, the MAF is a sensor, No program in it. It uses a heated wire to maintain a temp. The amount of power to maintain the temp is reported to the ECU in either voltage or a frequency.

The URD maf calibrator adds a programmable translator in the middle.. but the ECU has no idea it is there.
oh so the MAF sends data to the ECU but there is no return exchange... that would make an ECU flash or update have no impact on it at all then... So my example (tv vs computer) is not how that works... yup, I was confused.
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Old 03-25-2018, 06:47 PM #71
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I’m glad you guys cleared that up. Thank you @wfo9 for clearing up how this works for everyone.

So 10 days in and, I like it. After resetting the ECU you have to give the truck a few days to adjust to you and your environment again. Then you can really compare before and after. Here is my feedback so far.

I had to jump out into traffic from a median the other day, I got on it but did not wind it out. To my surprise my driver side rear gave a little chirp when I hit second gear. My truck was not 100% straight yet but very close. I’m just saying I understand the wheel was not fully loaded to the ground.

Taking off from the line in traffic has definitely improved, without feeling like you have to really gas it. This little gizmo has complimented my other mods very nicely, and I consider my truck very fun to drive at this point.

MPG’s
For those interested in mpg, this is not something I expected. For me faster = more fuel so how could that be? Strangely enough I have seen a bump from where I was.

The bottom line is that this mod was the icing on the cake that made my other mods work better together.

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Old 03-25-2018, 09:29 PM #72
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The bottom line is that this mod was the icing on the cake that made my other mods work better together.

You're running the SprintBooster AND the URD MAF Calibrator?! I guess the former changes your throttle input map, the latter changes the MAF input voltage to the ECU.
I don't see any particular reason why you couldn't use them both, but why not just get something red.... with 8 cylinders, a sunroof, summer street tires, and a blonde? LOL
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Old 03-25-2018, 09:56 PM #73
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You're running the SprintBooster AND the URD MAF Calibrator?! I guess the former changes your throttle input map, the latter changes the MAF input voltage to the ECU.
I don't see any particular reason why you couldn't use them both, but why not just get something red.... with 8 cylinders, a sunroof, summer street tires, and a blonde? LOL
Check it out, a troll has appeared. You have just displayed;
Confusion
Acceptance
Approval
And finally snarkyness, all in one post on a thread you have nothing to contribute to.

Your comments here today have only revealed that you are a narcissist and possibly suffer from some form of mild retardation.
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Old 03-25-2018, 10:01 PM #74
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Originally Posted by TRUSTYAXE View Post
I’m glad you guys cleared that up. Thank you @wfo9 for clearing up how this works for everyone.

So 10 days in and, I like it. After resetting the ECU you have to give the truck a few days to adjust to you and your environment again. Then you can really compare before and after. Here is my feedback so far.

I had to jump out into traffic from a median the other day, I got on it but did not wind it out. To my surprise my driver side rear gave a little chirp when I hit second gear. My truck was not 100% straight yet but very close. I’m just saying I understand the wheel was not fully loaded to the ground.

Taking off from the line in traffic has definitely improved, without feeling like you have to really gas it. This little gizmo has complimented my other mods very nicely, and I consider my truck very fun to drive at this point.

MPG’s
For those interested in mpg, this is not something I expected. For me faster = more fuel so how could that be? Strangely enough I have seen a bump from where I was.

The bottom line is that this mod was the icing on the cake that made my other mods work better together.

Two Months into my install and very happy with it.
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Old 03-26-2018, 08:28 AM #75
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Check it out, a troll has appeared. You have just displayed;
Confusion
Acceptance
Approval
And finally snarkyness, all in one post on a thread you have nothing to contribute to.

Your comments here today have only revealed that you are a narcissist and possibly suffer from some form of mild retardation.
Typical internet, you misunderstood.
I questioned your decision to install both devices, found a plausible reason for it, shared that with others, and again questioned your reason for both. While I'm sure someone somewhere has made one into a drag street machine, that's a lot to expect of a 6500lb SUV. So when I see someone with what appears to be a lot of performance mods I question it, humorously and with sarcasm, asking why you don't have a more performance oriented mid-life crisis car instead.
While I may accept that you have installed both, if you care I don't actually approve. I've read the SprintBooster threads as well as I had considered one. And I agree with most of the postings on actual results. I can smash the pedal more to achieve the same result, except not be out the couple hundred bucks for some black box. While your initial comments seem contributory, I don't imagine many 4Runner drivers care much for chirping tires in second. Although in fairness I was able to do that in both my 91 626 and 95 SC2.

As for snarky and all the name calling... let's just say your chosen response to my post was no better than the post following it:
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And while I may not presently be able to add much to this thread, it's only because my URD device is still in the box awaiting install with the exhaust. Although such doesn't preclude me from asking questions and attempting to learn, I would hope that would be encouraged.
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