XEDE Engine Management System Available Soon!

[matsuda]

BEGI uses a microphone and headphones.

Thank you but I wasn't asking how BEGI does it.

Nutari makes a big deal about end users being able to tune the car themselves. Without knowing when detonation occurs, it could potentially be dangerous.

 

[Nutari]

I have 2 questions:

1) When making user adjustments, how does one know when the onset of detonation is reached? Obviously this is very important to know unless one wants to damage their engine.

2) Eaxctly which ECU signals (input or output) are being modified or monitored by the XEDE?

Obviously, you should have some knowledge before making ANY adjustments to your car.

 

[matsuda]

Obviously, you should have some knowledge before making ANY adjustments to your car.

Agreed.
Please answer my questions. If you don't know the answers, then say so.

 

[Nutari]

Thank you but I wasn't asking how BEGI does it.

Nutari makes a big deal about end users being able to tune the car themselves. Without knowing when detonation occurs, it could potentially be dangerous.

Do you have a personal problem with me?

1. Detonation is audible. As said before, BEGi uses a microphone for better accuracy. You as a person should be able to hear knock/ping.

2. MAP, MAF, Timing and boost are altered.

Any other questions?

 

[StephanieT]

Without knowing when detonation occurs, it could potentially be dangerous.

Each car will detonate at a different level, rpm or boost pressure. Octane plays a big factor in this as well. The detonation should be audible.

A car should also be tuned with a "safety margin" for this reason. ie. leave the AFR about 12:1.
Stephanie

 

[matsuda]

Do you have a personal problem with me?

1. Detonation is audible. As said before, BEGi uses a microphone for better accuracy. You as a person should be able to hear knock/ping.

2. MAP, MAF, Timing and boost are altered.

Any other questions?

I don't have a personal problem with you. However, I cannot understand why you refused to answer my simple questions.

We all know that detonation can be audible. I was asking you have a suggested method to detect the onset of detonation. In other words, is the XEDE tied in to the knock sensor? As you well know, mild detonation may not be audible (a knock sensor will detect detonation before it is audible).

 

[flyrevs]

"See" when you have detonation with this!

from Turbo XS:
"So how do you KNOW that you are knocking BEFORE it's too late? The TurboXS KnockLite (TM) will detect even minor, inaudible detonation and flash the multicolored LED to alert you to the knock so that you can do something about it before it's too late. The KnockLite is a must-have product for anyone that is modifying their engine for more power. The KnockLite wires into either your factory knock sensor or into separate knock sensor (sold separately) that is mounted to your engine block."
$130 bucks
and No I'm not affiliated at all with Turbo XS in any way

Looks sweet, however I have no experience tuning an engine.
Just thought of it cuz of the discussion.

 

[quiet desperado]

I don't have a personal problem with you. However, I cannot understand why you refused to answer my simple questions.

We all know that detonation can be audible. I was asking you have a suggested method to detect the onset of detonation. In other words, is the XEDE tied in to the knock sensor? As you well know, mild detonation may not be audible (a knock sensor will detect detonation before it is audible).

Sounds like you want to be spoonfed. If an experienced tuner like BEGI uses a microphone, then the Xede is obviously not tied into the knock sensor. Why would they go through the hassle if they could just get knock sensor data from the Xede? Presumably, when audible knock is detected adjustments are made to leave a margin of safety for inaudible knock.

Sounds like they ought to get one of those lights, though.

 

[matsuda]

Sounds like you want to be spoonfed. If an experienced tuner like BEGI uses a microphone, then the Xede is obviously not tied into the knock sensor. Why would they go through the hassle if they could just get knock sensor data from the Xede?

Yes, that is why I asked Nutari "Exactly which ECU signals (input or output) are being modified or monitored by the XEDE?"

 

[Nutari]

Yes, that is why I asked Nutari "Exactly which ECU signals (input or output) are being modified or monitored by the XEDE?"

I answered you. Any other questions?

 

[LinuxRacr]

Each car will detonate at a different level, rpm or boost pressure. Octane plays a big factor in this as well. The detonation should be audible.

A car should also be tuned with a "safety margin" for this reason. ie. leave the AFR about 12:1.
Stephanie

Stephanie! Welcome to these forums. This is Patrick, from DFW. Glad to see BEGI bringing something to the Mazda!! I remeber the days of the 1st BEGI kit for the Protege, and how great it worked. Keep it up!

 

[StephanieT]

Hi Patrick!!!

(drinks)
Stephanie

 

[aroz27]

Each car will detonate at a different level, rpm or boost pressure. Octane plays a big factor in this as well. The detonation should be audible.

A car should also be tuned with a "safety margin" for this reason. ie. leave the AFR about 12:1.
Stephanie

Stephanie, are any special considerations being made for Direct Injection? I was under the impression that DI was localized rich, but overall lean. Is the "safety margin" different for this application?

Adam

 

[4DRHTRD]

Stephanie, are any special considerations being made for Direct Injection? I was under the impression that DI was localized rich, but overall lean. Is the "safety margin" different for this application?

Adam

Well if the tailpipe is seeing an AFR that would be a true AFR in my opinion....

 

[aroz27]

Sorry, to clarify what I'm saying. You're tuning as lean as possible without knocking, then scaling back for a little safety blanket. I'm just wondering whether that '12:1' AFR saftey margin is being applied to the baseline tune.

If I'm remembering DI correctly, you can run a leaner mixture. So while 12:1 remains a good reccommendation for standard SI engines, theoretically you're not taking advantage of the DI technology. I'm not a DI expert by any means, I'm just wondering if anything will be approached differently with this engine technology.

 

[aroz27]

Well if the tailpipe is seeing an AFR that would be a true AFR in my opinion....

And doesn't the cat alter the AFR reading slightly? So maybe the tail pipe isn't really the true AFR (wink)

 

[Captain KRM P5]

And doesn't the cat alter the AFR reading slightly? So maybe the tail pipe isn't really the true AFR (wink)

this is a good question. in my experience the difference is marginal though it may vary from car to car. the best method of checking your AFR is to get your reading about 36 inches downstream from the exhaust source, ex - weld in a bung to your exhaust and install your wideband sensor there.

Sorry, to clarify what I'm saying. You're tuning as lean as possible without knocking, then scaling back for a little safety blanket. I'm just wondering whether that '12:1' AFR saftey margin is being applied to the baseline tune.

If I'm remembering DI correctly, you can run a leaner mixture. So while 12:1 remains a good reccommendation for standard SI engines, theoretically you're not taking advantage of the DI technology. I'm not a DI expert by any means, I'm just wondering if anything will be approached differently with this engine technology.

it is not as easy to detonate or when detonation occurs as easy to damage the engine on DI as it will occur after top dead center on the rotation.

 

[redms3gt]

Thinking about the way DSI works, the fuel isnt in there to detonatnate till the last second. Wouldnt this prevent some of the possability of DETO. Is the air fully compressed before the fuel added? or is it added just before..Could be bulitproof. Would be nice. Is 12/1 is on the lean side for a normal turbo motor? I thought most car tuned for 11-11.5 for a margin of safety.

 

[Captain KRM P5]

Thinking about the way DSI works, the fuel isnt in there to detonatnate till the last second. Wouldnt this prevent some of the possability of DETO. Is the air fully compressed before the fuel added? or is it added just before..Could be bulitproof. Would be nice. Is 12/1 is on the lean side for a normal turbo motor? I thought most car tuned for 11-11.5 for a margin of safety.

not bulletproof i would say, but you are on the right track. 12 to 1 is where you typically make the most power without compromising longevity. running 11 to 1 is a nice cushion especially for stock engine vehicles.

 

[SPEEDGuy]

this is a good question. in my experience the difference is marginal though it may vary from car to car. the best method of checking your AFR is to get your reading about 36 inches downstream from the exhaust source, ex - weld in a bung to your exhaust and install your wideband sensor there.



it is not as easy to detonate or when detonation occurs as easy to damage the engine on DI as it will occur after top dead center on the rotation.

Fuel is only injected during the intake stroke under wide open throttle on a direct injection engine. Fuel is injected during the compression stroke only during lean-cruise mode. So, detonation is just as dangerous in this direct injection engine as it is in any other traditional port injection engine.