Cav with 3.0 omega v6

[Nobbyzcavi]

Hi guys i might be aquiring a cav with a 3.0 v6 from and omega. Is there 2 engines the xe and the ecotec ? whats the pro's and cons with these?? what perfromance will i be looking at quarter mile times?? 0-60 etc?? mpg? service costs??

cheers

[Gaz]

Dont worry about it, the engines are the same its all the manifolds and ecus that determine what the output will be.

[Nobbyzcavi]

so what would i be looking for mate?? and what ecu etc?

[Gaz]

If its in a cav with originally a c25, its going to be putting out more power than a vectra with the x25 based conversion.

Couldnt tell you power but 200bhp is always thrown about by the vectra boys, mpg about 30 if you don't hammer it
Service costs will be the same as the 2.5 as its basically the same engine.

Its a conversion so id be checking its been put back together right as theres not much that should go wrong as its a like for like swap.

[humbucker]

omega v6 will be x30xe i would imagine, 210-215 bhp standard in original vehicle.

[v6sri]

do you know what gear box its got or flywheel,but in general you should see o-60 times of about 6-7 secs and a qutermile in around the 14/15z,defo be a quick car

[humbucker]

standard flywheel will be heavy, courtenay lightened one is a good route to go, but expensive.

as for gearbox, is it manual or auto? and it doesnt necessarily follow that the omega gearbox was shifted over with it.

what year was the omega it came out of? there should also be the engine name stamped on the block somewhere. this would help with any questions you have. if its the x30xe, which it probably is, i have this in my omega, get average 35mpg out of it. expect more in the cav if driven sensibly. might be able to help you with any questions as im very familiar with this engine.

[Squig]

what gearbox as 30-35 will be based on the F25... 200bhp sounds right as the c25xe inlet and exhaust manifolds are usually re-used and these drop the power a little.

6.5 sec (ish) to 60 on the F25 is my guess with courtney lightened flywheel... I got 7 dead with very little effort starting the clock just before and stopping it just after 60 with the TC left on, lightened fly and other tweaks possibly about 180-190bhp on a c25xe with the F25.

[Gaz]

Has nobody ran a f20 flywheel and clutch on a v6, my mate used to rave about his.

[Squig]

inc the F20 box?

[Gaz]

Eh? yea with the f20 box aswell, he said it transformed the car.

[Squig]

In which case the better gearbox is the F28 with a lightened flywheel. More expensive but you get better eco than the F25 or the F20, so better in the long run.

[Gaz]

Try finding one, the only good f28 i know of is mine, and the one still in a cav turbo.

[Squig]

I have one that I'm sitting on

[Gaz]

If its at yours im coming round one day to see if i can convert my hydrolic one back to cable using another box, as like a dumbass i binned all the bits that made it a cable box.

[cav_2.0_gli]

im doing exactly this.

ive just bought a M-reg Omega 3.0 V6 Elite, to wrip the lump out of it, and fit it in my cavy. will be tuning the engine aswell.

they put out 210bhp as standard. going to tune the 3.0 V6, and it will have:

gasflowed + ported + polished cylinder heads x2
gasflowed + ported + polished inlet manifold (cav V6 one)
gasflowed + ported + polished throttle body (cav V6 one)
4 bar FPR
x6 new injectors
ECU re-map
performance 3 branch exhaust manifolds + matching downpipes (3 into 2 in 1)
De-Cat pipe
Piper Cat back exhaust system
10mm performance HT leads + bosch super4 plugs
lightened flywheel and sports clutch
and any other bits i can do. cant think what atm, but there was other bits.

and il be bolting a F28 gearbox to it, with a 5kg billet flywheel + uprated sports clutch

you can use the C25XE ECU + engine loom to run the 3.0 V6 engine. just use your F25 gearbox etc on the 3.0 lump.

i'l let you know how i get on with my engine conversion!

[HAIRIBO]

[quote="cav_2.0_gli"]
gasflowed + ported + polished cylinder heads x2
gasflowed + ported + polished inlet manifold (cav V6 one)
gasflowed + ported + polished throttle body (cav V6 one)
4 bar FPR
x6 new injectors
ECU re-map
performance 3 branch exhaust manifolds + matching downpipes (3 into 2 in 1)
De-Cat pipe
Piper Cat back exhaust system
10mm performance HT leads + bosch super4 plugs
lightened flywheel and sports clutch
and any other bits i can do. cant think what atm, but there was other bits.

quote]

I looked into this when I went for the 3litre.

Gas flowed heads are around £500, Inlet and injection manafold flowed are £130ish each, Throttel bodies around £45, Exhaust manafold custom £500+ De-cat is ilegal and V6's aren't ment to like them, so I went for the Sports cat £170 Cheaper than a standard vaux item. ECU remap's go from £375 upwards. I'd consider tuning your car very carefully. Because just new shells bearings and bolts just to rebuilt a v6 is well over £250. In the end All I went for, was...

fully rebuilt engine, new pumps etc.
Enlarged throttle body.
10mm HT leads
Indrium plugs
Holden v6 injectors
3.8bar FPR (Half the prive of a 4bar)
Sports cat
Center pipe and back box
Piper cams.

Everything else just seams too expensive for what gain you get. I'm going to get the remap once everything is soreted and running smooth.

In the end I went for lightened flywheel. sports clutch and f20 with f18 5th gear.



Hope this helps. BTW piper cams on a 3litre are went to be a 20 BHP gain. I doubt you'd get that from gasflowing the heads etc. The way I did my engine anlone with out transmission cost well over £1500, so thats why I thought F**k the price of gas flowing heads.

If I had a turbo of rast c20XE for track use, I defetl;ey would not gasflow a v6, because for starters its twice the price!

[berry]

30xe loves the f20 flywheel and box

[vaux24v]

ive had loads of v6's with the f20 box and also had a f28 on a x30xe in an astra van, much better than the f25. using the c20xe flat flywheel and clutch its a good combination and makes acceleration so much better. i used to make the driveshaft spacersa dn long bolts and spacers for when using f20 etc as the box is shorter so you need to space the engine mount and driveshaft centre bearing.

[HAIRIBO]

I'm using a f20/18 hybrid on a lightened c20let fly wheel and uprated c20xe clutch. Pulls nicely, never liked the f28, find it sloppy.

[Gaz]

Hybrid? higher 5th?

[berry]

I'm using a f20/18 hybrid on a lightened c20let fly wheel and uprated c20xe clutch. Pulls nicely, never liked the f28, find it sloppy.

im with hairibo on this one im running f20 box and the early flat xe flywheel very good very resposive iv also got engine mods ontop of that .i take mine to york drag way and getting early 15's late 14's could be faster just cant get the power down

[HAIRIBO]

the 5th gear cog off the f20 is swaped with one off a wide ratio f18.