Vandit

Check out the engine compartment for the silver car. It's obviously a 964, but the dual distributors are no where to be found. How do they pull that off?

http://singervehicledesign.com/gallery/index.php

Indycam

Bigstuff3 , it and many other systems have the computer send out the spark signal to coils connected to individual spark plugs . The computer looks at a toothed wheel attached to the crank so that it knows where it is re the firing of cylinders .

http://www.bgsoflex.com/megasquirt.html
"Ignition control MegaSquirt-II code/hardware has the ability to control ignition (full spark timing advance control, dwell control, etc). It supports 1 coil/distributor configuration, and the Ford EDIS 'wasted-spark' system, among others. Input trigger and output parameters are fully user configurable"

http://www.aa1car.com/library/copign.htm
"First it was the distributor that vanished"

http://www.electromotive-inc.com/products/
"The TEC systems combine an innovative approach to fuel injection with our industry leading Direct Ignition, replacing the existing carburetor or fuel injection system, ignition, distributor and coil."

http://bigstuff3.com/about/
"It is unique to the marketplace in that it is not only capable of controlling the engine’s fuel and spark (coil on plug!!) requirements..."

ChaseN

Yep, you also won't find a distributor on anything past a 993. FYI, its typically called "coil on plug" (COP)

Vandit

Is running a system like this on an otherwise stock, naturally aspirated, street car beneficial (decent bang for the $)?

Indycam

The stock 964 set up can't be much improved upon for street use .
A C.O.P. system will not give a HP or fuel mileage advantage for the street .

Indycam

On the other hand , if you are going to stuff your cylinders full via a blower , the ac delco D585 coils are hard to beat .

http://www.megamanual.com/seq/coils.htm
"These LS2 coils are incredible. Even compared to the LS1 coil, these are just crushers! On the LS1 coil there is around 40 milliamps of peak secondary current with 5 milliseconds of dwell time. On the LS2/truck coil (AC Delco D585), there is 120 milliamps! "

rollingjack

I ran with aftermarket ECU. Instead two distributors are two Bosch 6x2 coilpacks.

frankvan

Rollingjack,
did you notice any difference between distributors and the coil pack? I can see fewer moving parts as an advantage for maintenance.

Gus

I think that a lot of the value in the coil packs is the controlling ECU -
there is significant advantage to be had on the street side as well - as you can tune for economy and for performance as a good program will give you a wider range of timing control - but is also linked to the fuel/injector timing control - / -the coil packs - or plug coils are really just the beginning of the program.

rollingjack

For maintenance?

Yes, if you fave stand alone ECU, you not need more Scantool. All live data you see in your laptop. You can change and adjust everything.

Gus explanation is very good.