[Gmecm] Re: MSD or Delco DIS

[William Lucke]

So you plan to build a controller external to the ECM that would handle 
the feedback loop to control the VVT actuator so that all the ECM would 
have to do is output a signal describing where it wanted the cam phasing 
held and wouldn't have to control the feedback loop itself. Interesting.



Will


> From: "David Allen" <davida1 at hiwaay.net>
> Subject: Re: [Gmecm] Re: Gmecm Digest, Vol 22, Issue 32
> 
>   I had planned to fully utilize the VVT - will be another challenge I look 
> forward to learning from.
>   Haven't taken it to the track because there are no tracks here that I know 
> of; and I'm not in the loop of people locally to make such an outing.  That 
> day will come however.
>   I'm using a Tech Edge 2B0 datalogger for this car.  Nothing high-tech; I 
> have to review the data in Excel and adjust the tables manually.
>   As for the VVT; I can build a controller which will look at cam reference 
> and crank reference and hold the VVT at whatever position is commanded. 
> This could take a duty-cycle signal from the ECM.  It could possible use the 
> PWM output, and table in the BIN originally for EGR to allow an older ECM to 
> work. Something to think about anyway.
>   I'd rather not have an MSD system unless it is necessary.  It was 
> necessary with the distributor but I bet DIS will be strong enough as-is.
>   Thanks!
> David
> 
> 
> 
> 
> - ---- Original Message ----- 
> From: "William Lucke" <william.lucke at highspeedlink.net>
> To: <gmecm at diy-efi.org>
> Sent: Saturday, December 30, 2006 6:59 PM
> Subject: [Gmecm] Re: Gmecm Digest, Vol 22, Issue 32
> 
> 
>> That's a cool setup. Have you ever taken it to a drag strip and gotten 
>> numbers?
>> The 3900 and '06 3500 both have variable cam phasing. This necessitates an 
>> advanced ECM. The latest engine that would be compatible with your current 
>> (or any OBDI) ECM would be an '04-'05 3500. Stock 3400's have made over 
>> 300 WHP turbocharged.
>> MSD makes multi-channel boxes with adapters that mount between the DIS 
>> module and the coils.
>> Your page mentions an aftermarket datalogging system... what system is 
>> that?
>>
>>
>> Will
>>
>>
>>> From: "David Allen" <davida1 at hiwaay.net>
>>> Subject: Re: [Gmecm] Re: MSD or Delco DIS
>>>
>>>> BTW, im curious what type of vehicle this is in. Is is
>>>> a s10 or camaro or an older front drive car ?
>>>   It'a an older FWD car - a Buick Century.  Maybe this didn't go through. 
>>> http://home.hiwaay.net/~davida1/superc.htm shows the car and it has a 
>>> link to the engine setup.
>>>   I'm not in this for looks or to be able to say "I have an MSD ignition" 
>>> to the riceboys.  I just wanted something that works properly with my 
>>> setup.  A stock 1-coil distributor did NOT work properly... The MSD was a 
>>> very non-invasive drop-in solution that absolutely _fixed_ the problem.
>>>   The MSD box works exceptionally well, but my next motor will be a newer 
>>> one with factory DIS. (maybe even a 3900!)
>>>   I know the GN guys have a standard DIS and boost 20 PSI with it and 
>>> have plenty of ignition.
>>>   Thanks,
>>> David