Is there any way to get ride of +24 channels logging resolution

[wesam]

With newer GM torque based ECMs we are forced now to log more PIDs like Torque,Fuel pressure PIDs
In GEN 4 we don't have to go beyond 24 channels when logging but now we have a problem that if we add
more PIDs the resolution will be decreased at the same time we can't leave those PIDs without keeping an eye on
So i hope there will be a solution for this problem

Thanks in advance
Wesam

[Blacky]

The V7 Scan Tool is limited to 4 packets of 6 channels, giving a total of 24 channels before logging falls below 10fps (for VPW) or 40fps (for CAN).

For the V8 Scan Tool:

VPW is still limited to 24 channels because that is the limit of the VPW PCMs.

CAN controllers the timings are:

• 1..28 channels (4 packets x 7 channels per packet) at 40 frames per second.
• 29..35 channels (5 packets x 7 channels per packet) at 32 frames per second.
• 35+ channels is proportionally slower the more packets that are added (i.e. each time you add 7 channels the rate will drop).

Regards
Paul

[wesam]

Is E92 a CAN controller ?

[GMPX]

Yes E92 is CAN, in fact the faster rates and channels in V8 should also apply to E38's as well (I'm not sure on E40 even though it is CAN).

[wesam]

So its not EFI limit its an ECM limit

[GMPX]

It's both.

As Paul said on the older controllers like the LS1B it is the PCM that is the limiting factor. When GM moved to CAN things got better but V7 still has inherit limits with logging speeds and channels.
V8 does not have those limits with the CAN controllers, again as Paul said in V8....

CAN controllers the timings are:

• 1..28 channels (4 packets x 7 channels per packet) at 40 frames per second.
• 29..35 channels (5 packets x 7 channels per packet) at 32 frames per second.
• 35+ channels is proportionally slower the more packets that are added (i.e. each time you add 7 channels the rate will drop).

Cheers,
Ross

[ScarabEpic22]

Hey Ross/Paul, could one of you confirm is the FlashScan V2 doesnt have these limitations when BBL? I thought I remember hearing that, but it's been a while.

[Blacky]

Hey Ross/Paul, could one of you confirm is the FlashScan V2 doesnt have these limitations when BBL? I thought I remember hearing that, but it's been a while.

BBL logging has the same limitations as what I described in post #2 above. Those restrictions are the ECM's limits, not FlashScan/AutoCal BBL or the V8 Scan Tool limits.
It's a little more complicated than the simplistic description I gave above but generally those are the frames rates you should be seeing with both V8 pass-thru and BBL.

Regards
Paul

[ScarabEpic22]

BBL logging has the same limitations as what I described in post #2 above. Those restrictions are the ECM's limits, not FlashScan/AutoCal BBL or the V8 Scan Tool limits.
It's a little more complicated than the simplistic description I gave above but generally those are the frames rates you should be seeing with both V8 pass-thru and BBL.

Regards
Paul

Thanks Paul, yes they will have the controller limits but BBL does not have the V7 Scan tool limitations correct? So you can scan with extra channels at the higher speed using BBL vs V7 Scan.

[Blacky]

Thanks Paul, yes they will have the controller limits but BBL does not have the V7 Scan tool limitations correct? So you can scan with extra channels at the higher speed using BBL vs V7 Scan.

Correct, BBL does not have the V7 limits. BBL is the same as V8 pass-thru for channels/packets restrictions.

However, to maintain compatibility between BBL and the V7 scan tool, BBL still generates *.efi (V7 style log files) and not *.pld (V8 style log files).
That means BBL still has the limitation of not being able to log the same PID from two different controllers. I.e. you can't log RPM from the ECM and RPM from the TCM using V7 pass-thru or BBL. But you can log both of those PIDs using V8 pass-thru.

Once the V7 scan tool is retired then BBL will be brought inline with V8 pass-thru and will generate *.pld log files. That will only happen once the V8 editor is done and integrated with the V8 pass-thru scanner. And that is planned to happen this year. It's been planned to happen for the past 4 years. But I am determined to make it happen this year.

Regards
Paul