Omega Owners Forum - V8 conversion details

Lesopc Intermediate Member Offline Worlds Biggest GM Fan Posts: 294 West London Gender: Drives: W plate 2000 Vauxhall Omega 2.0 GLS Manual Saloon	V8 conversion details 31. Mar 2011 at 10:52 If i were to fit a GM LS series V8 into my miggy, would the ECU Black Box(es) fit within the engine bay without modification? If modifications are required, can anyone tell me what they would be?
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Shane dub rydda Intermediate Member Offline Posts: 265 maidenhead Gender: Drives: Factory irmscher wiggly stick conversion 3.0v6.my wifey has an elite auto 3.0v6	Re: V8 conversion details Reply #1 - 31. Mar 2011 at 11:51 im very interested in this myself, i would love to fit a v8 in my mig... maybe one day but i will keep watching
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Lesopc

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Worlds Biggest GM Fan

Posts: 294
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Drives: W plate 2000 Vauxhall Omega 2.0 GLS Manual Saloon

Re: V8 conversion details
Reply #2 - 31. Mar 2011 at 12:18

Just a little something i think should have happened. GM/Opel/Vauxhall did originally plan one but it never materialized.
Mine would be a Irmscher Team V8Star tribute car from years 2001-2003 driven by the great Jonnie Cecotto as car #9 and #1 (2001/2) and Yves Olivier (2003 R1&2) and Roland Asch (2003 R3,4,6&7) as car #2

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Why oh why was there never a V8 Omega????
Such a missed oppurtunity.
Look forward to the Cadillac ATS & ATS-V. Maybe a re-badged one will replace the Miggy as a RWD runner?

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joshwyatt Omega Knight Offline Posts: 1769 Oxford Gender: Drives: 2003 '52' Vauxhall Omega 2.6 V6 Elite saloon manual, 2005 '55' Land Rover Range Rover 4.2 V8 Supercharged	Re: V8 conversion details Reply #3 - 31. Mar 2011 at 12:24 I'm afraid I'm not able to help on the technical side, but perhaps this official photo of the planned V8 Omega may help? I think I have a few more, I'll try and dig them out.
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TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: V8 conversion details Reply #4 - 31. Mar 2011 at 13:35 Much of the mechanical details are within TIS, but no wiring info. Also, AFAIK, the different code indexes and configurations for the associated ECUs (gearbox/ABS) never made it to TIS, thus not available.
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chrisgixer Omega King Offline Black ones are faster. Posts: 14570 Wokingham Gender: Drives: "Omega Black" 3.2 Elite. Thanks to Joshwyatt.	Re: V8 conversion details Reply #5 - 31. Mar 2011 at 18:54 I'll have to get the pc out, Tis only gives me wiring diags for some reason?
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Gaz79 Newbie Offline Posts: 4 Drives: 2002 2.2DTi CDX	Re: V8 conversion details Reply #6 - 31. Mar 2011 at 20:48 Youshould have the room in the engine bay because they used the same chassis for the Holden Commodore of the same year and they can with a V8. Father-in-law has just sold his HSV GTS VT-II, such a lovely car and the main reason i bought a Mig
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Lesopc Intermediate Member Offline Worlds Biggest GM Fan Posts: 294 West London Gender: Drives: W plate 2000 Vauxhall Omega 2.0 GLS Manual Saloon	Re: V8 conversion details Reply #7 - 31. Mar 2011 at 23:40 So in theory it should all fit then? Thanks guys.
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chrisgixer Omega King Offline Black ones are faster. Posts: 14570 Wokingham Gender: Drives: "Omega Black" 3.2 Elite. Thanks to Joshwyatt.	Re: V8 conversion details Reply #8 - 01. Apr 2011 at 01:17 Awaits a post from 2woody...
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damon80 Senior Member Offline Posts: 704 Wigan Drives: 2004 3.2V6 Manual	Re: V8 conversion details Reply #9 - 01. Apr 2011 at 01:21 When the v8.com Omega was originally conceived (before obviously being canned) - was it the LS1 or LS2 engine that was fitted? (I can't see it have being the Northstar V8 they envisaged fitting to it)
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chrisgixer

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Black ones are faster.

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Drives: "Omega Black" 3.2 Elite. Thanks to Joshwyatt.

Re: V8 conversion details
Reply #10 - 01. Apr 2011 at 02:00

North star is way too wide. We know the steering box was retained, there are pics on the web of additional cooling rad and plumbing for the pas system, and we know an LS1 has been fitted diy, which is very close to the steering box meaning special headers had to be made to clear the steering box by the rear cylinder on that side.
Ls engines are twin valve per cylinder with push rods working off a single cam in the valley of the v, so there are no cams in the heads, only rockers, this makes the Ls heads very compact and narrow.

North star is double overhead cam four valves per cylinder. So that naturally makes both heads wider, and hence will not clear the steering box. Will n star fit with a rack? Maybe, but note the v platform was widened for use in Holdens etc. The Holden is a wider car I am certain.

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« Last Edit: 01. Apr 2011 at 02:07 by chrisgixer »

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chrisgixer Omega King Offline Black ones are faster. Posts: 14570 Wokingham Gender: Drives: "Omega Black" 3.2 Elite. Thanks to Joshwyatt.	Re: V8 conversion details Reply #11 - 01. Apr 2011 at 02:16 Also I believe the Northstar was originally designed for front wheel drive applications.
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TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: V8 conversion details Reply #12 - 01. Apr 2011 at 08:40 chrisgixer wrote on 01. Apr 2011 at 02:16: Also I believe the Northstar was originally designed for front wheel drive applications. V8 and FWD. That sounds like ~~a whole lot of fun~~ an expensive tyre choice...
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chrisgixer

Omega King

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Black ones are faster.

Posts: 14570
Wokingham
Gender: male

Drives: "Omega Black" 3.2 Elite. Thanks to Joshwyatt.

Re: V8 conversion details
Reply #13 - 01. Apr 2011 at 09:25

TheBoy wrote on 01. Apr 2011 at 08:40:

chrisgixer wrote on 01. Apr 2011 at 02:16:

Also I believe the Northstar was originally designed for front wheel drive applications.

V8 and FWD. That sounds like ~~a whole lot of fun~~ an expensive tyre choice...

Yes, seems odd to me, but each to thier own as they say...

Afaik, by far the biggest problem fitting an LS1 will be the exhaust manifold/steering box collision issue on the rear cylinders, then getting the exhaust to exit down the transmission tunnel, there's very little room.

Here's an LS1 in place, see the position of the steering box, where the rear exhaust msnifold should be exiting.

And here is the original exhaust manifold designed for the v8 omega on the steering box side, left hand drive in this case, note the shape of the rear exhaust exit from the head due to the space available.

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« Last Edit: 01. Apr 2011 at 09:35 by chrisgixer »

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chrisgixer Omega King Offline Black ones are faster. Posts: 14570 Wokingham Gender: Drives: "Omega Black" 3.2 Elite. Thanks to Joshwyatt.	Re: V8 conversion details Reply #14 - 01. Apr 2011 at 09:30 So siting the ecu will be a minor issue. But having said all the above this conversion has been done, by at least two people on both sides of the pond.
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