randy88k5
1/2 ton status
Glad to hear its working well for you, I still need to order mine. I need to do a lot of research before I plug it in the Blazer. Back to studying...
CK5
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Wow!
- Thread starter southernspeed
- Start date
Creek
Registered Member
Thanks Mark for bringing this subject to this forum and thanks to Dorian for finding this information in the first place. The ability to drive multiple injectors is nice but that's not difficult to do with a standard 7747. What is intriguing about this system is the enhanced firmware and the additional analog inputs. It would be nice if the A to D was twelve bit instead of ten but for the price I won't complain. I will be ordering one of these soon but since my son has the Blazer at college, two and a half hours from home, I will not have a lot of opportunity to play with it for a while. Maybe K20 will be interested in testing this system with a wide band O2 on his 496" big block.
David
David
According to Bob at Dynamic, the original system can drive 4 injectors but falls on it's face when the demand is high.
Another great thing about this system is the VE learn. No more 'guessing' how much fuel to add or subtract. Should make fine tuning a lot quicker especially with an emulator. I like the idea of a shift light and the OBA idle bump is just what I was looking for.
I still need to get my head around some of the set up and functions but I'm getting there and BobR has been incredibly helpful.
Another great thing about this system is the VE learn. No more 'guessing' how much fuel to add or subtract. Should make fine tuning a lot quicker especially with an emulator. I like the idea of a shift light and the OBA idle bump is just what I was looking for.
I still need to get my head around some of the set up and functions but I'm getting there and BobR has been incredibly helpful.
Creek
Registered Member
I understand the limitations of the 7747 injector drivers but an external driver board is not that difficult to build as long as you can use bank fire.
Is Bob's email address [email protected]? I have a few questions I'd like to ask.
Is Bob's email address [email protected]? I have a few questions I'd like to ask.
randy88k5
1/2 ton status
Yes, that is the correct address. I emailed him a few weeks back. Here are the questions and responses:
better code to run the engine. Your engine will run smoother and be
more responsive.
temperature (IAT) sensor can be added for better fuel control. But is
not required.
and still available.
from there. The supplied BIN is a stock calibration that will work
with 90% of the engines out there. Of course changes may be made to
this BIN as required even before it is used for the first time.
Data logging and analysis is done with the supplied What's Up Display.
The serial cable is also included.
Yes, it is very much an upgrade. Just considering the ECM BIN there is
better code to run the engine. Your engine will run smoother and be
more responsive.
Yes, unplug the '7747 and plug in an EBL converted ECM. An intake air
temperature (IAT) sensor can be added for better fuel control. But is
not required.
The 4-injector driver setup can drive just 2 injectors.
No, it is an extra cost option. It can be also be added later.
57.6 Kb (yes, it is fast). The standard ALDL interface is unchanged
and still available.
No, will need to use the supplied EBL BIN (better ECM code). Then tune
from there. The supplied BIN is a stock calibration that will work
with 90% of the engines out there. Of course changes may be made to
this BIN as required even before it is used for the first time.
It is a serial interface. Uses the standard serial port on the laptop.
Data logging and analysis is done with the supplied What's Up Display.
The serial cable is also included.
Yes, sure can.
Creek
Registered Member
Thanks Randy. You provided the answer to my main question which was about the interface. The 160 baud ALDL is excruciatingly slow. I know I'll have to get him to convert my bin as my motor runs just slightly better with the stock bin as it does in limp home mode. I would also like to know why the ten bit A to D. It could be a routing limitation. Anyway, it still sounds like a bargain and it addresses some of the problems with the stock 7747. This could be a really good thing.
David
David
Creek, I think you'll find that once you've set it up and do some VE Learn runs, all your problems will be well on there way to being solved. The Learn ability sounds almost too good to be true.
If you haven't already done so, have a read through this.
http://www.thirdgen.org/techboard/diy-prom/356351-tuning-ebl.html
If you haven't already done so, have a read through this.
http://www.thirdgen.org/techboard/diy-prom/356351-tuning-ebl.html
Well, I got the EBL up and running today with an added IAT sensor and WB O2. I've only had time to do a few miles with the VE Learn function on but I think this is going to be good. Already the self learn ability is modifying the fueling. I think it's going to be way faster and more accurate than the old way plus the data is so easy to read. I can already see that my injector duty cycles are maxed out by 3200 rpm under WOT so I'll need to up the pressure a bit and see if that helps.
The help from BobR ( designer of EBL and mod in the thirdgen DIYprom forum) has been amazing. He must get bombarded with stupid questions like mine but you always get a prompt and detailed answer...even with the time lag from here! Not sure that he even sleeps! lol.
I'll report back in a few days or so when I've had a chance to get some driving in.
The help from BobR ( designer of EBL and mod in the thirdgen DIYprom forum) has been amazing. He must get bombarded with stupid questions like mine but you always get a prompt and detailed answer...even with the time lag from here! Not sure that he even sleeps! lol.
I'll report back in a few days or so when I've had a chance to get some driving in.
cool.... I'll be picking your brain on this at some point...
I'll have to get myself an EBL as soon as I can spend the money without my wife noticing. 
My factory setup is okay, but the idle has never been the best, and I don't know if I have all my parameters right. It'll be awesome to have some documentation and tech support.
I like the support for electric fan, and TH400 kickdown control if I care to hook that up.
You know what would be cool? Continuously variable idle setting using an A/D input with a dial on the dash someplace.
What other custome 4x4 mods could we dream up? You could force off the fans with a switch for water crossing, but then that would be more easily done with plain old switches and wiring...
My factory setup is okay, but the idle has never been the best, and I don't know if I have all my parameters right. It'll be awesome to have some documentation and tech support.
I like the support for electric fan, and TH400 kickdown control if I care to hook that up.
You know what would be cool? Continuously variable idle setting using an A/D input with a dial on the dash someplace.
What other custome 4x4 mods could we dream up? You could force off the fans with a switch for water crossing, but then that would be more easily done with plain old switches and wiring...
Well I've done quite a bit of open loop VE learn and got it running pretty good. There's scope for much more improvement but I've got a road trip coming up in less than 2 months and want a really good 'general' tune for that. After that I'll go back and do more o/l tuning. I need more fuel pressure or maybe bigger injectors as my inj duty cycle is maxed out at 4000rpm now.
As it stands now (still doing closed loop VElearn), it's running smoother and more responsively than ever. I've burnt up a serious amount of gas tuning though!!! I'll be glad to get some gas mileage back!
All in all I haven't one negative thing to say about EBL. Perhaps if you have a bone stock motor and are happy with the way it runs it may seem like a waste of money, but with hindesight I think it could make good improvements to a stock set up. If you have a mildly or severly modified motor I'd say it's an essential upgrade.
As it stands now (still doing closed loop VElearn), it's running smoother and more responsively than ever. I've burnt up a serious amount of gas tuning though!!! I'll be glad to get some gas mileage back!
All in all I haven't one negative thing to say about EBL. Perhaps if you have a bone stock motor and are happy with the way it runs it may seem like a waste of money, but with hindesight I think it could make good improvements to a stock set up. If you have a mildly or severly modified motor I'd say it's an essential upgrade.
