Using TPI on a non-GM engine

[peter paul fenske]

Hi Brock and All

I believe the infinity has a separate coil for each cylinder..
Retaining that will prove a bit of a challenge.

Even the latest PCM's don't have the ability to fire single
cylinder coils..

Assuming you are gonna keep the coils you have to use some
glue logic and build up a system similiar to the 2.8,3.1,3.4
coil pack and fire the coils in waste spark mode.

If you can get into the amp for the 2.8 pack it shouldn't be
that difficult to fire four two sets of coils..

The interface to the ECM is the same.. A Open collector ref 
signal must be provided for the ecm to measure rpm and as
a ref for spark. The ecm provides a bypass signal which
switchs from sensor to amp mode into a sensor to ecm to amp mode
The amp also has an input for the ecm to drive..

Look into a manuel for a 85 up distributer for more info

The coil pack setups are the same as far as the ecm is concerned
as a HEI distributer. However the coil packs need a crank signal and
some use a cam signal..

Now if you graft a HEI distributer onto the thing from a 88 to 92 or
so I think most of your problems are solved.

Well mail me if you need more info:peter

Mind you where you used to work I would think you know much more
than me..

At 05:32 PM 6/25/97 -0400, you wrote:
>Brock and Jennifer Fraser wrote:
>> 
>> P. Fenske wrote:
>> 
>> >I would consider the Infiniti system superior. I would suppose you
>> >don't have it available..
>> >
>> >I guess you could use a hei module driven by some sort of crank
>> >trigger alla MSD or chrysler race to drive the ecm..
>> >
>> >Still though from what I have seen a batch fire  distributer
>> >system like gms doesn't compare to Infinities..
>> >
>> 
>> >>Everything is basically cookbook (with regards to prom mod's and tuning and
>> >>sensor mounting) except the fact that the Q45 engine lacks a distributor.
>> >>Is anyone familiar with the electrical inputs and outputs of the
>> >>ECM/ignition system as they relate to the coil, ignition module, and rpm
>> >>signal from the distributor (on a TPI setup...)?
>> >>
>> >>Obviously, I'm going to try to skin-graft some kind of distrubutor onto the
>> >>engine, maybe where the OEM cam position sensor was.
>> 
>> Peter and all,
>> 
>> Yes. I agree the Infiniti setup is far superior, problem is that I don't
>> have it and it is expensive.  See, I've got the Infiniti long block but it
>> has no sensors, wiring, or computer.
>> 
>> I'm keen on the TPI setup, just because I'm familiar with getting the ECM
>> to do what you tell it to.  It's also a cheap setup to buy at a junkyard or
>> from somebody like Street and Performance.
>> 
>> You mentioned an HEI module.  Could you elaborate on the workings of the
>> ECM/ HEI Module/ Stock distributor as an ignition system?
>> 
>> Thanks guys,
>> 
>> Brock Fraser
>What's this motor going into? Does it have to meet current emissions?
>Barney Ward
>
>