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[VectraGSi]

Hi all,

Hoping someone can point me in the right direction, I own a 2.6 Vectra GSi, have been told by a few people a good upgrade is getting "G" cams from a 3.0 V6 omega, does anyone know where I can source these from, or part numbers?

Also does it make a difference what year the car was, or are they all the same?

Thanks

[tigers_gonads]

try a pm too this 
http://www.omegaowners.com/forum/YaBB.pl?num=1260285901/5#5

should give you a easy 20 bhp extra 

[VectraGSi]

Thx for the link bud, will these be the G cams then from the X30XE engine?

Thx

[Ken L]

Excuse me for hi-jacking this topic, but a couple of questions.
 Can you fit these cams fromm the 3.0l in a 2.5 engine, or just the 2.6 as an upgrade? and has there been any actual tests to show the bhp increase? also, how is the running of the car affected through the rev range, do these cams for instance increase top end power at the expense of lower mid range power and driveability? and how is the economy affected?
 In other words, what are the overall effects?

[VectraGSi]

I know the 2.5 vectra gsi comes with 2 G cams and 2 A cams buts again thats a vectra....

I just seen a youtube video with G cams in the 2.6 Vectra and it idles fine and pulls great when at 4000rpm, here is a chart of the differences on vectras:

Engine Plan - Y26SE - Development Number 1345456555 GM CODE MBK26VEC1

Capacity - 2597cc
Max Power - 171ps@5800rpm
Max Tourque - 203 nm (179.7lbs ft)@ 4000rpm

Cam Directive - Block Number 5565454 - Cam Code A Bank 1 Cam Code E Bank 2

Modification Plan - Y26SE - Development Number 667656553X GM CODE MBK26GSIP

Capacity - 2597cc
Max Power - 194ps@5700rpm
Max Tourque - 299 nm (209lbs ft)@ 4000rpm

Cam Directive - Block Number 654778X - Cam Code G Bank 1 Cam Code G Bank 2


Modification Plan - Y26SE - Development Number 99656534555 GM CODE MBK26GSI

Capacity - 2597cc
Max Power - 180ps@5700rpm
Max Tourque - 274 nm (202lbs ft)@ 4000rpm

Cam Directive - Block Number 6554542 - Cam Code A Bank 1 Cam Code A Bank 2

top plan is what the non Gsi's have A's and E's,

Second plan is what the Gsi should have had, 4 G's.

Third plan is what the Gsi actually has, 4 A's.


The theory I heard about the reason the Gsi got A's instead of G's was that the power and torque figures with G's was too close to the 3.2 in the omega that vaux put the brakes on. They worried everyone would save 3k by buying a 2.6 omega and putting G cams in instead of buying the 3.2!

[VectraGSi]

bumpsky 

[serek]

Thx for the link bud, will these be the G cams then from the X30XE engine?

Thx

yes they come from x30xe

[Kevin Wood]

This might be useful. http://www.omegaowners.com/forum/YaBB.pl?num=1152565319

Kevin

[VectraGSi]

Thanks for that Kevin, will be useful, just hope these cams are still available.

Another question though does anyone know if there would be any timing issues on chaning these over?

Thx

[Kevin Wood]

Thanks for that Kevin, will be useful, just hope these cams are still available.

Another question though does anyone know if there would be any timing issues on chaning these over?

Thx

All the while there are 3.0 V6s being scrapped, they'll be available. 

They don't wear significantly, so 2nd hand will be fine.

Kevin

[goonv6]

Is it worth just transplanting the whole lump?

[VectraGSi]

my engine has only done 61k had it been more I would consider it for sure...

[The Red Baron]

my engine has only done 61k had it been more I would consider it for sure...

dan "ilovemyelite" had a set for sale

[VectraGSi]

Already pmed him buddy, hoping he replies soon

[goonv6]

If that's the case, either keep it so you can return the car to stock or sell it, get a decent 3.0l lump and get everything done like ported heads, polished plenums etc.

[Martin_1962]

Is it worth just transplanting the whole lump?

And gearbox, rear axle and propshaft - actually cheaper and easier to buy an MV6

[Martin_1962]

I think the 3.0 cams in the 2.6 produce just under 200bhp, Mikes 2.6 produced 194 with a blocked exhaust centre section.

I think mine is in that region as well

[Marks DTM Calib]

Considering the option for 4 G cams over 2 A and 2 G cams.....I see little if zero gain for having G cams on the exhaust as they offer the same lift as the A's with the same duration but a steeper opening ramp. This when you consider that gains with cams on the exhaust are minimal due to the method of gas removal from the chamber etc.

4G's will also double your cost as no engine was ever fitted with 4 from the factory so your looking at needing bits from 2 engines!.

You will also need the 3.0 inlet divider....and if ging the whole hog, opening the ports out on the head gives an improved inlet track (but requires head removal).

[Ken L]

Looking at these posts then, can I take it that you can use these cams in the 2.5, is it the same as the vectra engine in the Omega? no other changes.

Will the 3.0 heads with cams fit on the 2.5 block?

[Marks DTM Calib]

The 3.0 heads are not benefitial as they have larger combustion bowls and will lower the compression ratio of the engine.

The 3.0 cams will fit in the 2.5 heads and give a good 20bhp increase

[Ken L]

  Thanks. Good to know for future reference should the need, or desire arise.

[mic_k]

Is it worth just transplanting the whole lump?

And gearbox, rear axle and propshaft - actually cheaper and easier to buy an MV6

hmm I was told that it all stays the same, rear axle and propshaft for sure were the same. Correct me if I'm wrong 'cause I'm about to do that upgrade next week hopefully  that mean to change the lump and keep the rest as it is

[serek]

Is it worth just transplanting the whole lump?

And gearbox, rear axle and propshaft - actually cheaper and easier to buy an MV6

hi dont need any of them parts on Vectra

[Martin_1962]

Is it worth just transplanting the whole lump?

And gearbox, rear axle and propshaft - actually cheaper and easier to buy an MV6

hmm I was told that it all stays the same, rear axle and propshaft for sure were the same. Correct me if I'm wrong 'cause I'm about to do that upgrade next week hopefully  that mean to change the lump and keep the rest as it is

You already have them

[Martin_1962]

Is it worth just transplanting the whole lump?

And gearbox, rear axle and propshaft - actually cheaper and easier to buy an MV6

hi dont need any of them parts on Vectra

Yes you do - how else can you get the power to the correct end?