S2 engine into 1983 car

[zcacogp]

ORIGINAL: bert gear

you will need the S2 ECU, rad should be fine 2 fan cars were only for cars with AC 

Really? I thought that all S2's had two fans, and most of them don't have A/C. (Mine doesn't, but does have two fans.)


Oli.

 

[barks944]

Does the S2 have two crank sensors like the lux and turbo?

 

[Jonny944CS]

All the 16v engnies have the more modern 'single sensor', providing both speed and reference from a 60-2 pattern.

The missing 2 teeth give the once per rev reference, making a second (8 valve type) reference sensor redundant.

--------

16v cars also have a camshaft sensor (4 per cam rev) for fine(r) control of the ignition timing.

 

[peanut]

ORIGINAL: bert gear

you will need the S2 ECU, rad should be fine 2 fan cars were only for cars with AC

thanks Bert for clearing that up

. I checked my original car spec and it apparently had the optional A/C fitted when supplied ....hence the twin fan . I guess the previous owner must have stripped out the AC parts

 

[Jonny944CS]

Radiator fans are primarily rated to control the engine temperature when the car is stationary, managing heat soak within the engine bay.
Therefore, as Bert eluded to, twin fans provide extra capacity for ancillary equipment that may put an addition load on the engine (such as a high amperage alternator), or require additional cooling - such as an AC condenser trying to reject it's heat in a 35°C traffic jam"¦

The key factors concerned with maintaining a happy engine whilst thrashing around a track should be:
- Surface area of the radiator cooling cores
- Air flow into the radiator, due to the front valance design.
- Air flow out of the radiator, due to the engine under-tray design.


According to PET6 the ROW cars are split like this:

2.5 (8v and 16v), 2.7
- Basic radiator - 944 106 031 03
- Single Fan Cowling (no AC) - 944 106 141 02
- Double? Fan Cowling (AC option) - 944 106 143 02

S2, Turbo and 968
- Deeper and thicker radiator (all three slightly different)
- Twin Fan Cowling + 2 Stage thermostat on all models - 951 106 143 00

968 Clubsport
- Deeper and thicker radiator (same as std 968)
- Single Fan Cowling (no AC) - 944 106 141 02

 

[barks944]

ORIGINAL: Jonny944CS

All the 16v engnies have the more modern 'single sensor', providing both speed and reference from a 60-2 pattern.

The missing 2 teeth give the once per rev reference, making a second (8 valve type) reference sensor redundant.

Does the single sensor have the same plug as the VR sensors on the lux? 3 pin bosch type.

 

[Jonny944CS]

Not sure, as I don't have one to hand.

I can tell you that it is 3-pin and Bosch-style (connector T47 in bottom image), but I don't know the locking tab config.

Also shown is the cam sensor (connector T17).

 

[bertelli_1]

ORIGINAL: barks944

ORIGINAL: Jonny944CS

All the 16v engnies have the more modern 'single sensor', providing both speed and reference from a 60-2 pattern.

The missing 2 teeth give the once per rev reference, making a second (8 valve type) reference sensor redundant.

Does the single sensor have the same plug as the VR sensors on the lux? 3 pin bosch type.

Yes, both twin and single sensor models use the same sensor.The connector type is commonly known as a sureseal.

eta: all s2's have a twin fan setup, whether they have ac or not.

 

[barks944]

Cool, I can plug my DME into an S2 engine then. Cool.

Edit: Don't normally say cool so frequently. Maybe because it's just snowed about 6 inches here

 

[bertelli_1]

You could.....
but the ecu connector is different, the injector setup is different, as is the ignition control. And I guess you already know the crank sensor input is completely different.

 

[barks944]

I mean an S2 engine into a car with an 8V wiring loom. Should just be a case of writing 60-2 engine speed/position code. Might even be able to use the hall effect sensor on the cam using the spare VR sensor input.

 

[bertelli_1]

Maybe. But you'd have to consider the injector resistors & the ignition module, the latter you may be able to use dwell control in the ecu instead.

 

[barks944]

Are the injectors a different resistance to the lux? Ignition module isn't a problem as I can just switch to wasted spark.

 

[bertelli_1]

Yes, I 'think' so. They do have seperate ballast resistors which is quite unusual for any car.

 

[barks944]

That's pretty odd, I don't suppose you know the resistance? Are they peak and hold drivers like the lux/turbo?

 

[bertelli_1]

I don't know the resistance. They are grouped together which would suggest there is only one driver.

 

[os951]

All 951 & S2 models have double fans, even non AC models. Since S2 have a newer version of Motronic (with 60-2 triggering) than 8V ones, be sure you also have a S,S2 or 968 starter motor available.
8V version won't work with 16V flywheel/pressure plate..

16V starter:

8V starter:

I don't know the resistance. They are grouped together which would suggest there is only one driver.

8V injectors are grouped to pairs. So, from DME there are only two wires each running two injectors. I suppose 16V have a same kind of arrangement ?

 

[barks944]

The 8V DME only has one driver even though the injectors are wired in pairs. The pairs are paired on the PCB.