Please help.

What is the difference between the S1 and S2 engine? Can an s2 engine run from s1 ecu and fuel system?

Thank You

 

The metreing head is different, think the one on the S1 is better as it opens more.

 

also i think theres a difference in the way the turbos are cooled.. s1's t3 turbo is oil cooled and the series 2's t3 turbo is water cooled, i think im right. anyone agree?

 

yeah ur rite jamie i hav a s1 eng in my s2 oil pump and sump r diff also the injection systems diff s1 doesnt have a knock sensor on manifold its in the ecu
and vice versa also the metering unit is alloy on s1 i think its better all round

 

Few differences in S1 and S2 . few examples below , not all engine related but you may want to know


S1 has no ABS
S1 more basic loom , Does not run a temp sensor from the water supply , think its near the aux air device under the left hand side of the inlet manifold. Does not run a Knock sensor as on the s2
S2 can run on a S1 but not the other way round
S1 Has different gear box mountings , same as ECU . can run a S1 box on a S2 but not the other way round .
As per other thread the inlet manifold is slightly different .
Smaller 200mm clutch but dont quote me ,
Uses a lesspowerfull fuel pump , ( from the factory but probably replaced anyway )
S1 fuel accumulator is on the rear pasenger side near the wish bone and on the S2 its in the engine bay

Few others but thats all i can think of relevance

 

Yeh clutch is defo smaller on the S1.

 

forgot to mention the S1 turbo is air colled , S2 water cooled ,

Diffrernt radiators . and intercoolers to .

 

water pumps are different too