kurdt5

how does ECU swapping go???

can i use S2 ecu's on my series 1??

or is it

S1's you can use on the s2 only?

antony215

Ive been told you can use S2 ecu's on series 1's but not the other way because of the knock sensor.

vroooom ptssssh

S2 ECU's need a knock sensor to work properly, well the ECU's that had that facility, so i'd say S1 ECU on an S2 is fine as it doesnt have the need for a Knock sensor even tho the s2 engine has one

So S1 ECU on an S2 will be ok

I run an S1 ECU on an S2 engine

antony215

I was told wrong then

SafeChav

As Davvy says, you can switch all the ecu's between all cars and they will all function, but any series 2 ecu after 86 will have the input for a knock sensor, and without it the ingition curve will be extremely flat.

The later ecu's also require a the input from the secondary CTS but no one ever seems to mention this?

At very best if you want to run a S2 ecu on a series 1 you can just wire a knock sensor to it and tuck it up out of the way

kurdt5

thanks lads