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[zirk]

4.22 diff from a 2.6.

Lowers the gearing for acceleration and reaches top speed quicker. However it also raises the engine speed at cruising speed by about 400rpm.... Which doesn't sound much but could grate the nerves a little for some on a long journey.

Is that an easy job to do?

Wouldn't say easy, but well do-able with the rear of the car lifted.

Check your ratio first though, yours being a 1994 2.5 will probably follow the 3.0 ratios, 3.7 for Manual and 3.9 for Auto, they changed the 2.5 around 1998 from memory.

if Manual with 3.7 I personally wouldn't recommend fitting a 4.22 to it.

Why be that sir?

Going from a 3.7 to a 4.22 will too much of a jump in ratios, ist gear would be a waste of time, you be doing about 3500rpm when cruising at 70mph (115Kph) in 5th, your MPG will be out the window.

Might be handy for Track use, increased acceleration and different Torque at speeds in each gear, but would make the car undrivable for normal road use.

As said check what ratio is in there already before committing to fitting a 4.22 diff.

[Anthony in Madrid]

4.22 diff from a 2.6.

Lowers the gearing for acceleration and reaches top speed quicker. However it also raises the engine speed at cruising speed by about 400rpm.... Which doesn't sound much but could grate the nerves a little for some on a long journey.

Is that an easy job to do?

Wouldn't say easy, but well do-able with the rear of the car lifted.

Check your ratio first though, yours being a 1994 2.5 will probably follow the 3.0 ratios, 3.7 for Manual and 3.9 for Auto, they changed the 2.5 around 1998 from memory.

if Manual with 3.7 I personally wouldn't recommend fitting a 4.22 to it.

Why be that sir?

Going from a 3.7 to a 4.22 will too much of a jump in ratios, ist gear would be a waste of time, you be doing about 3500rpm when cruising at 70mph (115Kph) in 5th, your MPG will be out the window.

Might be handy for Track use, increased acceleration and different Torque at speeds in each gear, but would make the car undrivable for normal road use.

As said check what ratio is in there already before committing to fitting a 4.22 diff.

What would be another possible ratio other than the 3's??? 4's? Is that a daft question?
Maybe they are different over here?

[zirk]

4.22 diff from a 2.6.

Lowers the gearing for acceleration and reaches top speed quicker. However it also raises the engine speed at cruising speed by about 400rpm.... Which doesn't sound much but could grate the nerves a little for some on a long journey.

Is that an easy job to do?

Wouldn't say easy, but well do-able with the rear of the car lifted.

Check your ratio first though, yours being a 1994 2.5 will probably follow the 3.0 ratios, 3.7 for Manual and 3.9 for Auto, they changed the 2.5 around 1998 from memory.

if Manual with 3.7 I personally wouldn't recommend fitting a 4.22 to it.

Why be that sir?

Going from a 3.7 to a 4.22 will too much of a jump in ratios, ist gear would be a waste of time, you be doing about 3500rpm when cruising at 70mph (115Kph) in 5th, your MPG will be out the window.

Might be handy for Track use, increased acceleration and different Torque at speeds in each gear, but would make the car undrivable for normal road use.

As said check what ratio is in there already before committing to fitting a 4.22 diff.

What would be another possible ratio other than the 3's??? 4's? Is that a daft question?
Maybe they are different over here?

Maybe, as said you need to check. all this assumes you have a 2.5 Manual with a 3.7 Diff, fitting a 3.9 could work (similar to fitting a 4.22 to an Auto that already has a 3.9), this would give you around 3000rpm at 70mph in 5th but youwould still be down on MPG.

Driving a Omega V6 at 3000 Rpm whilst doing 70mph in 5th can be a bit frustrated, just doesn't feel right, been there, done that. .

[Anthony in Madrid]

To be honest...Not too bothered about speed on the old lady. Just want her driving smooth and looking good. I'll consider the 3.0 cams but I think that's about it. I'll change the wheels for sure too. Gonna bang on some 17"s very soon.

[Anthony in Madrid]

4.22 diff from a 2.6.

Lowers the gearing for acceleration and reaches top speed quicker. However it also raises the engine speed at cruising speed by about 400rpm.... Which doesn't sound much but could grate the nerves a little for some on a long journey.

Is that an easy job to do?

Wouldn't say easy, but well do-able with the rear of the car lifted.

Check your ratio first though, yours being a 1994 2.5 will probably follow the 3.0 ratios, 3.7 for Manual and 3.9 for Auto, they changed the 2.5 around 1998 from memory.

if Manual with 3.7 I personally wouldn't recommend fitting a 4.22 to it.

Why be that sir?

Going from a 3.7 to a 4.22 will too much of a jump in ratios, ist gear would be a waste of time, you be doing about 3500rpm when cruising at 70mph (115Kph) in 5th, your MPG will be out the window.

Might be handy for Track use, increased acceleration and different Torque at speeds in each gear, but would make the car undrivable for normal road use.

As said check what ratio is in there already before committing to fitting a 4.22 diff.

What would be another possible ratio other than the 3's??? 4's? Is that a daft question?
Maybe they are different over here?

Maybe, as said you need to check. all this assumes you have a 2.5 Manual with a 3.7 Diff, fitting a 3.9 could work (similar to fitting a 4.22 to an Auto that already has a 3.9), this would give you around 3000rpm at 70mph in 5th but youwould still be down on MPG.

Driving a Omega V6 at 3000 Rpm whilst doing 70mph in 5th can be a bit frustrated, just doesn't feel right, been there, done that. .

To be honest...Not too bothered about speed on the old lady. Just want her driving smooth and looking good. I'll consider the 3.0 cams but I think that's about it. I'll change the wheels for sure too. Gonna bang on some 17"s very soon.

[Webby the Bear]

So then boys.

Say I get my new superchips chip. I then decide that I actually don't want it any more. What needs to happen?

[omega3000]

So then boys.

Say I get my new superchips chip. I then decide that I actually don't want it any more. What needs to happen?

You give to me 

[zirk]

So then boys.

Say I get my new superchips chip. I then decide that I actually don't want it any more. What needs to happen?

You pull it out and put the original one back in.

In my experience though, (3.0 not 2.5) they do give improved mpg, especially on a run.

[Webby the Bear]

Got ya. So I can expect them to give me back my old chip?

[zirk]

Got ya. So I can expect them to give me back my old chip?

Yep, any good remapper should, tbh, on the Petrol Non DBW's there just an eprom swop inside the ECU, unless the Mapper is giving you 'value added services' like a before and after Rolling Road print out, the Eprom change is something you can do yourself, just dont bend or break the Prom pins.   

[henryd]

FORGET IT!

Not worth messing around with.  If you want a faster Omega, buy a faster Omega.

They come no quicker than 3.2 V6, in Black obviously. 

Yep

[henryd]

FORGET IT!

Not worth messing around with.  If you want a faster Omega, buy a faster Omega.

They come no quicker than 3.2 V6, in Black obviously. 

Yep

I went the 3.0 cams route with my 2.5,I wouldn't again,much quicker to drop a 3.0 donkey in and be done with it

[Webby the Bear]

I contacted Superchips for the shits and giggles. This was the reply:

Thank you for your enquiry.

Please click the following link for details of what we offer for your
car:

http://bit.ly/1wzB9Uw

On this model the modification is installed by replacing a chip in the
ECU.

The main benefit of the remap will be enhanced responsiveness,
especially in the mid-range.

If the flatspots are a characteristic of this model in general, the
remap will probably improve them; but if they are peculiar to your car,
the remap will probably make them worse.

A dyno run is not included because it is not necessary for the purpose
of the installation.

As long as the car is healthy and has been well maintained, there should
be no issues remapping a car of this age.

Unfortunately, however, we do not offer remaps for cars that have had
the EGR removed.

Why wouldn't they remap with an EGR blank?

[kevinp58]

Re spray it black. Job done

And don't forget the stripe that also adds some power. 

[Webby the Bear]

Lol anyone any thoughts on the reply from superchips?