mart sti v3

garage cant sort out the engine on my v3 after a few rebuilds so they said ***** to it and have taken an engine out of a version 4 which they know is a very good engine, are they as good as one another or are there any differences between them, turbo, heads,etc.

merlin24

iTrader: (1)

Both Version's are the same spec. - just make sure its a STi engine your actually getting.

Mick

banny sti

iTrader: (68)

The cams in version 3 heads are slightly wilder than the version 4, so I would keep your version 3 heads if possible.

Banny

mart sti v3

its the whole lot they have changed turbo inc, one lot out and another in. are the turbos the same?? will the map on the ecu make it run **** if different

banny sti

iTrader: (68)

The version 3 has a vf23 and version 4 has a vf24, the ecu for the v3 will be wrong for this setup and may cause issues at some point.

I would either get the ecu for the version 4 or get them to put the original turbo back on.

Banny

scoobysmiff

iTrader: (2)

nothing wrong with a V4 Sti engine

Jay m A

iTrader: (2)

If I'm reading your other post right it looks like the v3 heads have taken sone damage, so if you are not rejecting the car, plus the engine they are putting in is a running V4 STI (complete long engine swap) then its probably a good solution.

Just make sure they don't use any stuff from the v3 engine like the oil pump / modine etc as judging by the other thread they don't know how to flush the engine propery during a rebuild.

mart sti v3

there is nothing from that old v3 motor under the bonnet now, they simply took engine out of the v4 and dropped it straight in mine and bolted it all together, primed it up til oil light came off, water oil etc and fired up with o probs.