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1

Omega General Help / Re: Rebuild A 2.5 Into A 3.0 / 2.6 Into A 3.2?

« on: 18 October 2019, 15:09:57 »

If you delve into the development of the Vectra GSi/Supertouring they made some high lift cams in development (Courtenay? maybe) but it was then discovered that the 3.0 cams were an almost exact match, so 'off the shelf' parts were used instead. Its a fallacy that they used a different map, people have swapped standard 2.5s with 'MSD' ECUs and looked over them with compooters and they're identical - although they even claimed it in the Vectra brochure! (Isuspect because they didnt want to admit that the ONLY difference between the standard rep's car and the 'specialist' racing engine, developed by a racing team, consisted of.....a bloke in Liverpool picking a camshaft off a different shelf. 

Hahaha! This is golden! Only in Britain! You just gotta' love it!

So a stock 2.5 simply using the 3.0 cams will bump up 25bhp? Lovely! If this is the case, why is this not a more common mod? I mean almost 200bhp from a cam swap is surely desirable. Little disappointed at GM for not making this the standard setup to begin with, thus putting it on par with the BMW 525i which it would have competed directly against back in its day.

2

Omega General Help / Re: Rebuild A 2.5 Into A 3.0 / 2.6 Into A 3.2?

« on: 18 October 2019, 03:35:22 »

It's possible that whist they are externally the same size, the blocks might be more lightly cast, which would be bad for boring...

That said, the 3.2 crank is forged which is good, also fitting  a set of G cams and porting it along with a 3.0 ecu (chipable too) then you might see some useful gains without actually machining the block

This is all sounding very sexy indeed! You mention G cams, are these by any chance the same ones used by MSD? Another source says they are simply the stock 3.0 cams:

https://www.pressreader.com/australia/performance-vauxhall/20180801/281543701774503

Out of curiosity, what about the stock conrods?

You guys don't know how excited I am right about now. A facelift 2.5 V6 just popped up with 168,000km for sale by the second owner. It looks to be in mint condition with the sunroof too! (rare option here) !!

3

General Discussion Area / Re: Trump really is an uneducated fool

« on: 17 October 2019, 17:17:33 »

Where is KKT?

Sorry, its Cyprus, its just the local acronym + my town.

4

General Discussion Area / Re: Windows 7

« on: 17 October 2019, 16:55:23 »

I've been useing Deepin Linux for a few years now. It's a carbon copy essentially of Windows 7. Couldn't be more impressed. Based on Debian, not ubuntu.

5

General Discussion Area / Re: Trump really is an uneducated fool

« on: 17 October 2019, 16:51:03 »

Only if you actually believe that he wrote it or was even allowed to send it 

Nope, pretty sure that was him. That has TRUMP written ALL over it

You can tell his aids just couldn't care any more, and just sent it as is. 

"I'll call you later..." HAHAHAHA!

6

Omega General Help / Re: Rebuild A 2.5 Into A 3.0 / 2.6 Into A 3.2?

« on: 17 October 2019, 16:31:13 »

2.5 it is then... Not much to be done as the bores are cast as part of the block

But with all the correct components sourced, can an engine rebuilder not thin/widen out the block to increase the capacity? I mean there is a specialist market here for just these things. I have approached many of them and none of them have worked on the Omega V6 sadly, but they all said if it is modular, then it can be done with ease.

7

Omega General Help / Re: Rebuild A 2.5 Into A 3.0 / 2.6 Into A 3.2?

« on: 17 October 2019, 16:23:17 »

Sorry, I forgot to mention, you can NOT swap in another engine into the vehicle. So buying a 3.0 / 3.2 and dropping it in is out of the question. The engine code MUST match the one originally sold in the vehicle. These are the rules and is checked yearly come inspection time. Human nature is a funny thing though, and we love to figure out ways around things. 

8

Omega General Help / Rebuild A 2.5 Into A 3.0 / 2.6 Into A 3.2?

« on: 17 October 2019, 16:21:22 »

Hi guys

I moved years ago to a country that has extremely restrictive import rules of vehicles with engine capacity exceeding 2000cc way back since the 80's, so most cars since then have always been imported with the smaller engines, and rarely would you see an large engine vehicle here. Infact, most manufacturers exclusively built engines for these markets with smaller capacities, such as BMW/Volvo etc)

Since the late 90's however, the engine modding/reboring market was born, haha! For example, the BMW 520i engine was bored and rebuilt frequently to the spec of the 530i, or the Volvo (2.0T) 5 pot engine was rebuild to the higher 2.5T spec etc. As the parts are modular and simply requires a wider boar and aftermarket engine sleeves. So its all been extremely fun. (FYI this market has slowed considerably since the advent of really powerful sub-2.0 litre 4 pot engines on the market these days.)

Anyway, the only problem is, I have never seen this done to the Omega V6 engine. Its rare to find the 2.5 V6 but it does crop up now and then. I just checked the market and ZERO 3.0 / 3.2's exist. If it does, I've never seen it.

From my basic research, the 2.5 / 3.0 or the 2.6 / 3.2 is a modular engine.  Just different bore/stroke. My question is this, can anyone, in theory at least, tell me any problems that I may face? As it seems pretty straight forward.