[Gmecm] ECM test bench
squelch at ix.netcom.com
squelch
Fri Aug 4 14:38:23 UTC 2006
I've got to throw my $0.02 in here..
I found out late about the ECM test bench boards made by Saturn5 and got one of the few left from the first run.. Built it using the spec parts and it works great, upgraded some switches to locking lever ones to prevent accidental turn offs, I'm not even using it on the ECM it was designed for, and I'm using it it with a dual coil pack/ignition module setup. I have a dedicated PC with Freescan and tuner pro wired up with an ERPOM emulator right next to the o'scope.. This emulator is one the best bench tools I've ever used for tuning/code changes
Works great... So great in fact that when a second run of boards was done I purchased another one, it's now mounted into a pelican case with connectors for the ECM and some switches to swap between the board generated signals, and actual sensors. (I do track support and engine tuning for a race team, comes in handy to test sensors and calibration changes) This along with a IBM T-20 laptop an EPROM burner, and a solid state logger bolted into the race car connected to the ALDL stream has made my tuning at the track or on a dyno a breeze...
Logical and neat terminal connections, fused power, clean design...
Cross talk on the RPM and VSS?? I haven't seen it... and I've done a ton of stuff with interfacing different VSS sensors and playing with the RPM signals to deal with the dual coil ignition pack.
There is a difference between "inexpensive" and "cheap" Personally I think the original was inexpensive, and was worth the money...
Could it be made "cheaper"? perhaps..
If another one was offered. would I buy it? possibly.. since I'd like to dedicate another one for an upcoming project..
If saturn5 made more of the his original boards.. I buy two more... in a heart beat..
or
perhaps with saturn5's permission he would let me do a run of boards for myself.....
John Welch
PS: sorry if it came off as a rant.. back to lurking...
-----Original Message-----
>From: rawardsr at ameritech.net
>Sent: Aug 4, 2006 8:05 AM
>To: gmecm at diy-efi.org
>Subject: Re: [Gmecm] ECM test bench
>
>Really? Vertical position, board mounted? What
>terminal block? C&K SPST switches are $3.00 min.
>
>Sure LED's, 555's, and resistors are cheap, even at
>Rat Shack's inflated prices, it is everything else
>that costs a bit. Hell, some of the instrumentation
>amplifiers I buy (INA101AM) run $25 each.
>
>Whats your time to develop a circuit and layout?
>
>You can get board costs down to ~$25 each provided
>your willing to spend $500 bucks and order 25 boards.
>Set up fees alone are over $200.
>
>Sure you can get the price down in volume. The bugger
>is when you go to sell one, all those that wanted one,
>evaporate into thin air.
>
>Yes it is. And yes they are.. Bob
>
>--- Ryan Hess <rgmecm at yahoo.com> wrote:
>
>> To the contrary, I have. Pots are $1.50, 12
>> position terminal blocks are $1.97. That's in
>> quantities of one. If I buy enough for 10 boards,
>> prices drop significantly. Boards will be easy to
>> produce at $50ea.
>>
>> Is this Saturn5 by chance? I see some sarcastic
>> jabs...
>>
>> Ryan
>>
>> rawardsr <rawardsr at ameritech.net> wrote: Apparantly
>> you haven't looked at how much pots, connectors, and
>> switches
>> cost. Good luck assembling all the bits (quality
>> stuff) for less.
>>
>> Let alone the cost for a low production board run..
>> hehe.
>>
>> First I've heard about that, and I'd look to the
>> code first. Not is all
>> that is seems. Bob
>>
>> Ryan Hess wrote:
>> > 1) Parts are expensive. $75 for a few pots and
>> some 555's?
>> >
>> > 2) I've heard there is crosstalk between the VSS
>> and RPM outputs
>> >
>> >
>> >
>> > rawardsr wrote: What apparent problems? First
>> I've heard of any problems. Bruce
>> > Plecan has three of these since day one and is a
>> good freind. Ain't
>> > said word one of any issues he has found.. And
>> trust me, he'd tell me. Bob
>> >
>> > Ryan Hess wrote:
>> >
>> >>I think I'd rather build something from the ground
>> up, considering the costs (time) involved with
>> fixing the apparent problems with the first batch...
>> Although I wouldn't mind taking a look at his
>> design to have a starting point. Ideally I'd like
>> to see the cost get down to $100 with parts and
>> board. How realistic that is is yet to be seen.
>> I'm getting a preliminary budget together as we
>> speak. Cross your fingers ;)
>> >>
>> >>Ryan
>> >>
>> >>Mark Mansur wrote: Bob (Saturn5) doesn't have any
>> more PCBs for that board AFAIK. It's a nice
>> >>piece of equipment and I'd personally like to see
>> him make some more.
>> >>Perhaps he'd be willing to hand-off to Ryan?
>> >>
>> >>-M
>> >>
>> >>
>> >>----- Original Message -----
>> >>From: "Steve Ravet"
>> >>To:
>> >>Sent: Thursday, August 03, 2006 8:51 AM
>> >>Subject: RE: [Gmecm] ECM test bench
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>>-----Original Message-----
>> >>>From: gmecm-bounces at diy-efi.org
>> >>>[mailto:gmecm-bounces at diy-efi.org] On Behalf Of
>> Ryan Hess
>> >>>Sent: Thursday, August 03, 2006 9:37 AM
>> >>>To: gmecm at diy-efi.org
>> >>>Subject: [Gmecm] ECM test bench
>> >>>
>> >>>Hi guys,
>> >>>
>> >>>Anybody here interested in an ECM test bench, or
>> have a
>> >>>source for one? I would like to put together a
>> test bench
>> >>>for myself anyways, but obviously the more the
>> merrier.
>> >>
>> >>
>> >>Hey Ryan, I know you're on thirdgen also so you
>> probably already know
>> >>about this, but those guys designed one some time
>> ago and the plans may
>> >>still be available. Bruce's original testbench is
>> on the gmecm page but
>> >>I don't think it used a PCB.
>> >>
>> >>--steve
>> >>
>> >>
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>> >>
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