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[albitz]

That 3.2 engine sat on my drive would look  under the bonnet of a chevette. 

My mates 1256cc one was funlethal enough on a wet roundabout.

Kevin,you haven't lived until you've run out of talent half way round a fast sweeper in the wet in a 180bhp Chevette.

[TheBoy]

Tbh,the 3.0 engine has considerably more grunt than the 2.5.Rather than spend a lot of dosh trying tune the 2.5 it would be cheaper and easier to drop a 3.0 in there. Shame I know,but I weighed a car in a few months ago with a good 3.0 enine still in it.No-one wanted it at the time,so I just took the heads off and kept them.
The 3.2 is similar,but it might be quite involved to transplant one into a car which currently has a 2.5 in.Its a drive by wire setup,which would probably need quite a bit of rewiring I would think,so a 3.0 would be easier,as it would be a straight swap.

TBH, I think the 3.0l is quicker, maybe lacking the initial surge from idle that the 3.2 has, and is more economical.  So I would defo go with 3.0l over a 3.2 in this case, unless you need the forged crank.

[sjc]

I have an early (pre-immobiliser) 3.0l engine ECU here if you're thinking of using the factory management system.

[YZ250]

.....so is it better to engine swap to a bigger v6? or full engine transplant

Having owned both the 2.5 and 3.2, I can honestly say that there is a massive difference in the power of the bigger V6, mainly the torque.    As said, the 3.0 is probably the easier route for engine transplant due to not being DBW.
Be disappointing to spend loads on tuning the 2.5, just to have a standard 3.0 come past you. 

[Andy H]

cheers for the help everyone!

the Chevette has already got a 2.5 v6 in it
picture of engine bay below 

http://s1341.photobucket.com/user/HarleyDelRio/media/BSNoCmHCMAEF-d6jpg-large_zps0905751a.jpeg.html?sort=3&o=3

so is it better to engine swap to a bigger v6? or full engine transplant

Are you running the original ECU? You will notice a dramatic improvement in driveabilitiy if you install the complete bag-pipe system along with the solonoid valves 

[Nick W]

cheers for the help everyone!

the Chevette has already got a 2.5 v6 in it
picture of engine bay below 

http://s1341.photobucket.com/user/HarleyDelRio/media/BSNoCmHCMAEF-d6jpg-large_zps0905751a.jpeg.html?sort=3&o=3

so is it better to engine swap to a bigger v6? or full engine transplant

Nice car.
 I suspect it's already 'interesting' to drive, so the bigger engine would probably make it scary.

[HDR]

so the 3.0 litre the best way to go!? and the car is fast as is but going for wider wheels and different rear end set up so want abit more power just for abit more fun...
now to find one has anyone got one for sale?

and does the 3.0 use the same ecu and same wiring?

cheers for the help everyone

[albitz]

All wiring will be the same.Im pretty sure the ECU will be too,although someone more knowledgeable could confirm.
You would notice a big difference between the 2.5 & 3.0.

[05omegav6]

As already hinted at, 2.5 and 3.0 are electrically identical, so just a few bolts to swap them over for an instant 35+ bhp upgrade

[albitz]

As already hinted at, 2.5 and 3.0 are electrically identical, so just a few bolts to swap them over for an instant 35+ bhp upgrade

In real life use,it feels like much more than that imo.

[sjc]

2.5 and 3.0 ECU are different part no's in EPC but I'd strongly suspect the key difference is the ignition and fuel map chip - assuming we're looking at ECUs for the same chassis range... there are a lot of variants!

Best thing would be to post up the part no from the current ECU, alternatively, you just take the Eprom chip from any 3.0 ECU and plug it into the one you've got - this'd be what I'd do along with transferring the wiring from your 2.5 to the 3.0 lump.

i.e. transfer the ECU and wiring from your 2.5 to the 3.0 and change the chip in your ECU for the 3.0 one.

You could also use an MTek 3.0L chip if you wanted to "chip it".  I run a RedDot Racing chip in mine which has similar maps to the MTek chip but also has a higher rev limit (7,200 ), the difference is not astounding but noticeable.

Avoid the fleebay specials - they're all a waste of money and likely to reduce performance and fuel efficiency.

[sjc]

You'll also want to change the flywheel - the heavy dual mass one serves a purpose in a big car like the Omega but I doubt your Chevette weighs anywhere near 2 tonne so you'd see a difference with a lightened one.

[HDR]

I will grab the part number of my ECU as my car is in my mates garage at the moment getting rust sorted out on it

I have a lightened flywheel, diesel clutch and uprated fuel pump I am under the impression that i am running the standard ECU as it was a straight swap from the omega to the chevette

just need to get my hands on a 3.0 lump and ECU I am getting excited!

[symes]

if you going to put it into chevette--why not look at v8--merc or lexus or chev/ford if I was going to all the hassle of modifying then would want to make it worthwhile maybe an astra vxr engine as an example would be an easier option

[biggriffin]

I will grab the part number of my ECU as my car is in my mates garage at the moment getting rust sorted out on it

I have a lightened flywheel, diesel clutch and uprated fuel pump I am under the impression that i am running the standard ECU as it was a straight swap from the omega to the chevette

just need to get my hands on a 3.0 lump and ECU I am getting excited!

Got a 3.0L motor here 85k,and looms and ecu. Still in car.