Omega Owners Forum

Chat Area => General Car Chat => Topic started by: zirk on 17 June 2009, 19:47:01

Title: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: zirk on 17 June 2009, 19:47:01
The BM 2.5TD lump in the Qmega was detuned over the normal BM power (143 down to 131 bhp from memory).

My question is this, was this done by purely different Mapping in the Eprom of the ECU or was some other bits de tunned / downgraded.
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: Marks DTM Calib on 17 June 2009, 19:48:14
Purely EPROM
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: TheBoy on 17 June 2009, 19:51:21
Yup, and it was down to 120bhp...
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: zirk on 17 June 2009, 19:56:55
Thanks Mark, TB, hoping thats what you were going to say.

Were currently playing arround with my old 325 TDSE for some track fun, nearly up to 200 bhp, think you know what Im thinking. :y
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: Omegatoy on 17 June 2009, 19:58:17
hmmm we may have a slightly smaller  smaller turbo on the omega!!! certainly its mounted differently! who is capable of checking?
we have the same turbo as the shogun and a couple of others

also we have a much smaller intercooler!!!
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: zirk on 17 June 2009, 20:06:13
Quote
hmmm we may have a slightly smaller  smaller turbo on the omega!!! certainly its mounted differently! who is capable of checking?
we have the same turbo as the shogun and a couple of others

also we have a much smaller intercooler!!!

Ok, that would sort of make sense, think they also did that on the Freelander.

Will try and look into it. :y


Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: zirk on 18 June 2009, 00:28:44
OK, thinking out loud now, Intercoolers not a problem upgrade that and maybe run the engine a few degrees lower. If the Turbo is under spec then upgrade it and adjust the boost presure to normal BM or slightly above, question is I'am I going to through a load of faults codes on the Mig in the process?
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: NiallyV6CDX on 18 June 2009, 01:50:39
If you change the turbo / up the boost pressure (you could do this with just a wastegate bypass valve) without remapping the ECU the MAP readings will be too high and the ECU will probably just cut the fueling to the engine out to save it from going bang (at least thats what happened when I tried that on my old rover 2.0TD). Dont know how the miggy ECU would behave but imagine it would be simlar. Bigger intercooler and remap sounds good though :y
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: TheBoy on 18 June 2009, 12:06:11
Quote
If you change the turbo / up the boost pressure (you could do this with just a wastegate bypass valve) without remapping the ECU the MAP readings will be too high and the ECU will probably just cut the fueling to the engine out to save it from going bang (at least thats what happened when I tried that on my old rover 2.0TD). Dont know how the miggy ECU would behave but imagine it would be simlar. Bigger intercooler and remap sounds good though :y
LOL, not required on the BMW heap ;).  It has a very barbaric mechnical wastegate, easily adjusted.
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: zirk on 18 June 2009, 13:14:25
Quote
hmmm we may have a slightly smaller  smaller turbo on the omega!!! certainly its mounted differently! who is capable of checking?
we have the same turbo as the shogun and a couple of others

also we have a much smaller intercooler!!!

As far as I know the main difference between the BM 325 TD (118bhp) and the 325 TDS/e (143bhp) was an Intercooler and a bigger Turbo. So did the Omega end up with the same Turbo as the standard BM?
Title: Re: Omega 2.5TD vs BM 2.5TD BHP Question.
Post by: TheBoy on 18 June 2009, 13:31:34
Quote
Quote
hmmm we may have a slightly smaller  smaller turbo on the omega!!! certainly its mounted differently! who is capable of checking?
we have the same turbo as the shogun and a couple of others

also we have a much smaller intercooler!!!

As far as I know the main difference between the BM 325 TD (118bhp) and the 325 TDS/e (143bhp) was an Intercooler and a bigger Turbo. So did the Omega end up with the same Turbo as the standard BM?
Omega gets the M51 TDS engine, with intercooler