TIP: Somebody should take a GM LS1 computer and run in it on a 951
03-05-2009, 12:46 AM
#1
Rennlist Junkie Forever
Thread Starter
TIP: Somebody should take a GM LS1 computer and run in it on a 951
Here's a great tip. Take a GM LS1 computer (PCM) and run it on a 944 turbo engine.
These computers are light years ahead of most aftermarket stand-alone engine management systems. And buying the HP Tuners setup (around $400 for an individual license, slightly more with the MAP upgrade for boosted cars) will let you configure anything you can imagine.
The question is the trigger setup. After that it's a breeze. It's already setup for individual coil packs, sequential fire, boost or non-boost, MAF/MAP, etc...
And you can get these things for next to free!
Honestly... they rival a Motec in terms of configurability.
I'm amazed at the functionality when I'm in there adjusting my setup for my LS1 V8.
Just thought I'd throw it out there.....
TonyG
These computers are light years ahead of most aftermarket stand-alone engine management systems. And buying the HP Tuners setup (around $400 for an individual license, slightly more with the MAP upgrade for boosted cars) will let you configure anything you can imagine.
The question is the trigger setup. After that it's a breeze. It's already setup for individual coil packs, sequential fire, boost or non-boost, MAF/MAP, etc...
And you can get these things for next to free!
Honestly... they rival a Motec in terms of configurability.
I'm amazed at the functionality when I'm in there adjusting my setup for my LS1 V8.
Just thought I'd throw it out there.....
TonyG
03-05-2009, 01:18 AM
#3
Rennlist Junkie Forever
Thread Starter
The harness is even less so. The pin outs are so simple. Jeeze... make your own dang harness.
Not sure about the pickup, but I'm sure it's an easily addressable issue.
In any case these are two easily solvable issues. The upside is a super powerful ECU that's super inexpensive.
TonyG
03-05-2009, 01:30 AM
#5
Race Director
Id be more concerned about things like knock and ignition control. The reason stock ECU's usually produce such a nice drive is because they are coded for the engines characteristics. So the knock detection is usually very good as its profiled for the engine.
03-05-2009, 02:13 AM
#6
Rennlist Junkie Forever
Thread Starter
And yes they have knock control and ignition control (it's just that it's 10x more advanced than the 951 ECU's respective controls.)
The 951 ECU is 1984 technology.
The LS1 ECU is 1998 technology. That difference is HUGE.
Pinning out a harness for a LS1 ECU is no different that doing it for a Motec, AEM, or TEC3. Exact same deal.
Sure.. you have to the engine position sensor, but yo have to do that with the other systems too.
The difference is that you can probably get the LS1 ECU with the harness that plugs into the ECU for about $100!
The HP Tuner software costs you another $400 approx. So for $500, you have a stand alone engine management system that rivals that of systems that run upwards of $10k.
Plus.... the GUI for the HP Tuners software is very easy to use. Additionally... you could take the car to any place that tunes LSx powered cars and have them do the base line tune on your 951.
If I had it to do all over again... I'd be looking real hard at these ECUs to power my 951.
TonyG
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03-05-2009, 02:18 AM
#8
Rennlist Junkie Forever
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03-05-2009, 02:19 AM
#9
Rennlist Junkie Forever
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03-05-2009, 04:14 AM
#10
Perhaps a stupid question (i am not familiar with Chevy computers, i have only owned a 1957 Bel Air 
) How do you skip 4 additional cylinders? After all this computer was not originally ment for tune applications like commercially available ECU's where you can just choose how many cylinders your engine have.
Interesting idea though.
) How do you skip 4 additional cylinders? After all this computer was not originally ment for tune applications like commercially available ECU's where you can just choose how many cylinders your engine have.Interesting idea though.
03-05-2009, 04:25 AM
#11
Rennlist Junkie Forever
Thread Starter
Perhaps a stupid question (i am not familiar with Chevy computers, i have only owned a 1957 Bel Air ) How do you skip 4 additional cylinders? After all this computer was not originally ment for tune applications like commercially available ECU's where you can just choose how many cylinders your engine have.
Interesting idea though.
) How do you skip 4 additional cylinders? After all this computer was not originally ment for tune applications like commercially available ECU's where you can just choose how many cylinders your engine have.Interesting idea though.
So yes.... you can with the the flick of the mouse, select the number of cylinders.
This ECU was clearly designed to support a wide range of engine configurations.
TonyG
03-05-2009, 04:31 AM
#12
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If someone finds me a good deal on an ECU I will do it and write the whole thing up! It sounds like a fun project. My engine already has the Clewett setup so I can run any trigger wheel/sensor combination imaginable.
03-05-2009, 04:35 AM
#14
Rennlist Junkie Forever
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