JK99

iTrader: (5)

I have been offered a STI Hawk that needs a rebuild or possibly a replacement engine.

Would the 2.0 from an earlier widetrack be an option or are there too many other things that need sapped over?

I'd like to try and future proof it so a forged build is something I'd consider too but I wanted to know what other options are out there now?

Thanks

domino46

Just put a closed deck 2.5 back in and you will be fine ,, can't beat a properly built 2.5 as the torque makes it all worth while

JK99

iTrader: (5)

What sort of money would I be looking at to have one built? I'm not looking for anything mental, maybe get up to near 400 eventually but I'd settle for 350 just now.

Bazil_SW

iTrader: (4)

When I had my Hawk engine rebuilt because of failing head gaskets, it cost a tad over £4k for:


ACL Race Bearing Set
Crankshaft Polish
Rebore & Hone To 99.75mm
Mahle 4032 Piston Set Inc Rings
RCM 11mm High Tensile Head Stud Kit
RCM 0.78mm Stopper Head Gaskets
Engine Gasket Kit + Exhaust Gaskets
Full Genuine Cambelt Kit
Cylinder Heads Fully Rebuilt & Vac Tested
Air Pump Delete Kit
Modified Oil Pump Plunger
ILFR7H Spark Plugs
Oil & Filter
Anti Freeze
Labour
Oil & Filter Once 1000 Miles Is Completed
Dyno Health Check + Power Run
New clutch fitted

Which is good for about 400hp from what he said.

JK99

iTrader: (5)

Was that at RCM Bazil_SW or somewhere else? I'm up in the North East of Scotland so choices will probably be limited. I don't mind taking the engine out and giving them the lump alone and then getting it re-installed.

Any recommendations for up this way other than Brian Downie? Already been in touch with him and got a ballpark figure but I know he's always very busy.

Bazil_SW

iTrader: (4)

It was done by a specialist local to me in the West Midlands, on a drive in - drive out basis.

I got quotes from several places and they were all much of a muchness for the scale of rebuild, buts their's was a little more comprehensive.

Murrayf99

Get a low mileage EJ207 and plop it in. They are cheap, reliable and will do 400 all day long with the correct supporting mods. I think all bits should transfer over but you will need a remap.

TimH

iTrader: (11)

It really won't just "plop in".

Hawk is drive by wire, with different connectors for AVCS, different cam sensor arrangement, etc. Vehicle wiring won't match up with the 2.0l engine loom, nor will the hawk ECU drive the 2.0l.

It can be done, but don't just think it's a straight swap!

Murrayf99

I thought it would just be short motor, maybe heads?

TimH

iTrader: (11)

You can't use the 2.5l heads on the 2.0 (obviously!). The problem with the 2.0l system are:

- 2 pin AVCS cam sensors whereas the 2.5 has 3 pin. They work differently, so the ECU won't work with the 2.0l sensors. I don't believe the 2.5l sensors fit the 2.0l heads
- 2.0 relies on the traditional cam sensor with a matched crank trigger wheel/sensor (i.e. 3 cam sensors: main one plus 2x AVCS) whereas the 2.5 uses just the "AVCS" sensors. ECU will not be happy.
- different crank and cam trigger patterns. ECU will not be happy.
- Oh, the 2.0l ECU won't plug in to the 2.5 harness so that's not an option
- Hawk is DBW so the ECU is expecting that wherease 2.0l is cable. 2.5 inlet should fit the 2.0 but see above re: cam sensors.
- And the AVCS control valves have different connectors so you can't use the 2.5l engine loom without mods.
- You can't fit the 2.5 AVCS actuators to the 2.0l heads.

And so on.

But, as I said, it can be done with actually relatively straightforward wiring mods, but you will need an aftermarket ECU to deal with the differences.

If you want to do this you need to decide if you want to retain DBW or go back to cable throttle (pedal needs to be changed).

Then you can modify the 2.0l or 2.5l engine loom, as appropriate, so it all marries up, but you need an aftermarket ECU to deal with the 2.0 cam/crank/AVCS trigger patterns.

If it were me, and I wanted to fit a 2.0l to a 2.5l, I would:

- retain DBW
- fit the 2.5 inlet manifold to the 2.0
- mod the 2.5l engine loom to fit the 2.0l AVCS sensors and actuators
- add wiring for the 2.0l traditional cam sensor (or look at cam/crank trigger wheel swaps - oily bits not my forte!!)
- use a Syvecs as that's the most flexible.

TypeR99

iTrader: (2)

my mates just had a 2.5 closed deck forged engine built by Williams Motorsport for 4k.

Thats was him taking the long block to them, strip, rebuilt, rework heads, reassemble, cambelt etc. All he had to do is add his clutch, inlet, headers and ancillaries and refit.

Will be running it in this weekend, all signs are very good so far.

JK99

iTrader: (5)

The 2.0 swap sounds like a massive ball ache.

I've noticed a 2.5 on here that's had the heads done by the Engine Tuner a few K ago so I might go down that route and get the original engine built over time.

Cheers for the feedback guys.

Mark10sti

iTrader: (2)

I went icp for the parts and had the engine built at api ran it in then upgraded turbo, intercooler fuel rails, ecu, injectors etc and am running 520 ish at the wheels with room for more, take your time on the upgrades mate and you will have a monster before you know it

JK99

iTrader: (5)

Can you PM details of parts you used and the cost of the build etc if that's OK?

Cheers