[Gmecm] Re: Early and Late DIS compatibility (was: ECM Choice: Sequential V6...)

[Scott Pearson]

The later DIS on the 3800 (88-up) has 3x and 18x crank sensors. You'd have 
to upgrade the crank sensor to use the later (aka 'quick start') DIS module.

Bruce Plecan has this on his GN.

Scott

----- Original Message ----- 
From: "William Lucke" <william.lucke at highspeedlink.net>
To: <gmecm at diy-efi.org>
Sent: Monday, September 11, 2006 6:13 PM
Subject: [Gmecm] Re: Early and Late DIS compatibility (was: ECM Choice: 
Sequential V6...)


> Ok, from the Turbo Buick forum, I learned that the Turbo Buick ECM is the 
> 1227148 and that the turbo version uses $T31 code which is available from 
> Tunercat.
>
> How compatible are the signals of the early and late DIS between ignition 
> module and ECM? What resources are there for timing diagrams and 
> explanations of the early system?
> What kind of cam sensor does the 7148 expect? What kind of cam sensor does 
> the 3100 have?
>
> How easy/hard is the $T31 code to work with?
>
>
> Will
>
>
>> From: William Lucke <william.lucke at highspeedlink.net>
>> Subject: Re: [Gmecm] ECM Choice: Sequential V6, hydraulic transmission
>> with lockup convertor
>>
>> A 6000 is a larger, heavier car than Cavlier, is all wheel drive and this 
>> particular one is running reasonably sticky 245 tires on the front (205's 
>> on back) that already cost me 1.5-2 mpg compared to cheap 195's all 
>> around.
>>
>> If I can hit 25 mpg with the chain ratio change (24 is more likely), the 
>> best that a 16.5 AFR could theoretically do for me is 28 mpg. I won't see 
>> that because the real world isn't theoretical ideal (the real world has 
>> hills that will cause me to get into PE and convertor unlock with a 2.39 
>> final drive).
>>
>> As I said before, I can do better than I am, but if sequential is worth 
>> anything at all, I want it. Since my engine will come with sequential 
>> sensors & wiring, actually running that way sounds as simple as picking 
>> the right computer. Would a turbo Buick unit accomplish this?
>>
>> A '93 Z24 has the TH125? WTF?
>>
>> The shutter wheel in the opti-spark distributor used on the LT1's is 
>> quite 8 cylinder specific. I can see code that interprets that signal 
>> being difficult to convert to 6 cylinder operation.
>>
>>
>>
>> Will
>>
>>
>>
>>> From: Jay Vessels <jay at vessels-clan.com>
>>> Subject: Re: [Gmecm] ECM Choice: Sequential V6, hydraulic
>>> transmission, with lockup convertor
>>>
>>> Hi there!
>>>
>>> Production 3.1V6 Cavalier had either the THM125 or the Getrag 282 
>>> 5-speed manual.
>>>
>>> Comparing fuel economy numbers across cars and drivers is almost 
>>> impossible, but considering the mileage I got from my '94 Z24 
>>> convertible ($A1/5-speed) and what Dad gets from his '93 Z24 convertible 
>>> ($A1/auto), I will second the notion that decent fuel economy (30 MPG 
>>> highway) can be had from multiport systems.  I'd recommend tuning with a 
>>> wideband O2 sensor, regardless of system, to maximize the benefit of 
>>> whatever system you choose.
>>>
>>> As an aside, has anyone used LT1 ('8051) code for a non-V8?  Is there a 
>>> V6 or 4-cylinder version that is as flexible?
>>>
>>> Jay Vessels
>>> 1982 Chevrolet S-10 Sport, 2.8V6 TBI
>>> 1984 Chevrolet S-10 Blazer Sport, 2.8V6 (TBI pending)
>>>
>>> William Lucke wrote:
>>>> I assume that your Cavalier has a 4 speed transmission? Do you have 
>>>> functioning EGR?
>>>> I'm stuck with a 3 speed AWD that currently gets 22 hwy/19 city. 
>>>> Gearing changes might push me to 24-25. If sequential is worth 0.5 mpg, 
>>>> I want it.
>>>> I also think the 3100 is a fundamentally better/more efficient engine 
>>>> than the 3.1. With the roller cam and better heads/intake, it's 
>>>> certainly more responsive to boost.
>>>>
>>>>
>>>> Will
>>>>
>>>>
>>>> From: "Brendan Patten" <bpatten at centurytel.net>
>>>> Subject: RE: [Gmecm] ECM Choice: Sequential V6,    hydraulic 
>>>> transmission
>>>>     with lockup convertor
>>>>
>>>> I'm getting over 30mph highway with my 3.1L $A1 Cavalier.  Highway mode
>>>> fuel AFR 16.5:1 and a bunch of timing added. (still no knock)
>>>>
>>>> I'm trying to convert to $8D mask on my 3.1L right now for more BLM
>>>> cells. But no sequential.
>>>>
>>>> There was also the Turbo Grand Pri in 1989 with a 3.1L, $8F mask.  Not
>>>> sure of how many blm cells there
>>>>
>>>> $58 mask could be adopted to a DIS engine, you'll get 16 cells and
>>>> boost, still no sequential.
>
> _______________________________________________
> Gmecm mailing list
> Gmecm at diy-efi.org
> Subscribe: http://lists.diy-efi.org/mailman/listinfo/gmecm
> Main WWW page: http://www.diy-efi.org/gmecm