Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Yorky on 17 February 2011, 23:27:42

Title: X30XE Engine
Post by: Yorky on 17 February 2011, 23:27:42

Will the X30XE donk drop in as a straight replacement for my X25XE?

I'm an Electrical Engineer, not a spanner shuffler. The magic stuff I can suss but big spanners loose me.

Title: Re: X30XE Engine
Post by: RobG on 17 February 2011, 23:34:08

Need the gearbox as well. What`s wrong with your 2.5

Title: Re: X30XE Engine
Post by: ballcock50 on 18 February 2011, 08:13:36

Mine is running a 2.5 gear box with no problems and gets a work out now and again.  ;D

Title: Re: X30XE Engine
Post by: Varche on 18 February 2011, 08:19:59

Auto or manual?

Title: Re: X30XE Engine
Post by: cem_devecioglu on 18 February 2011, 09:10:42

ecu maps must be different I think :-/

Title: Re: X30XE Engine
Post by: Kevin Wood on 18 February 2011, 10:38:35

The engines are physically the same. Later 3.0s had a larger plenum but this can be transplanted by replacing the two rubber intake ducts that feed the throttles, and a longer throttle cable, or the old plenum could be retained.

If it's an automatic gearbox, the 2.5 will have an AR25. Would be best to replace this with an AR35 from a 3.0.

Manual gearboxes were also different but the consensus is that the 2.5 gearbox will handle the 3.0 with no problem so not worth swapping it in this case.

Diff ratio would probably have been different. Again, depends on auto or manual. Could swap the diff for a 3.0 one or retain the 2.5 one and get better acceleration at lower speeds against a higher cruising RPM and perhaps slightly higher fuel consumption.

Engine management ECU firmware was the same as well, IIRC. Fuelling is based on the measurement from the MAF so the system will cope with the extra fuel demand. Fuel injector flow rates were the same.

Kevin

Title: Re: X30XE Engine
Post by: tigers_gonads on 18 February 2011, 11:03:08

Quote

The engines are physically the same. Later 3.0s had a larger plenum but this can be transplanted by replacing the two rubber intake ducts that feed the throttles, and a longer throttle cable, or the old plenum could be retained.

If it's an automatic gearbox, the 2.5 will have an AR25. Would be best to replace this with an AR35 from a 3.0.

Manual gearboxes were also different but the consensus is that the 2.5 gearbox will handle the 3.0 with no problem so not worth swapping it in this case.

Diff ratio would probably have been different. Again, depends on auto or manual. Could swap the diff for a 3.0 one or retain the 2.5 one and get better acceleration at lower speeds against a higher cruising RPM and perhaps slightly higher fuel consumption.

Engine management ECU firmware was the same as well, IIRC. Fuelling is based on the measurement from the MAF so the system will cope with the extra fuel demand. Fuel injector flow rates were the same.

Kevin

i belleve that the 3 ltr ecu gives more fueling above about 4000 rpm  :-/

3 ltr lump will run with no problems if you use the 2.5 ecu and drop the 2.5 plenum and throttle body on top of it  :y

well mine has for the last year  :D :D

Title: Re: X30XE Engine
Post by: cem_devecioglu on 18 February 2011, 17:18:32

2.5 ecu can learn and arrange using the sensors lambda,maf and knock however I still think 3.0 map must be different looking at the examples of different cars as they use different maps..

also may not be a problem at low rpms but not sure when you reach the rev limiter..