Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: PhilCavSRi130 on 06 October 2014, 21:47:25
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Just a quick question.... are all the cams the same exh and inlet?
Just wondered as im looking to fit all g's to my 2.5 and wondered if they are handed so to speak.
thanks in advance :y
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Same, per side, ie, G's Left / Right inlet same, so if fitting some G's to the exhaust Left / Right. then you effectively juggle all 4 in the air for 10 mins before fitting. :y
Ny the way, do you have the cams yet?
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Thanks for that zirk.
Not as yet but i've a mate who's breaking his MV6 and hoping he will be breaking the engine and i can have the cams. Why do you ask?
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Thanks for that zirk.
Not as yet but i've a mate who's breaking his MV6 and hoping he will be breaking the engine and i can have the cams. Why do you ask?
Unless he has changed them in the past he will have 2 x G and 2 x A Cams in there if 3.0 or 2 x G and 2 x J if 3.2.
Asking because I have a set of G Cams still for sale (2 x G) from a 3.0.
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Ok. I was under the impression that all MV6's had all g's?? I already have a set of G and A's from a 3ltr elite so if worst comes to it i can use the g's from that and match with the other pair of g's.
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Ok. I was under the impression that all MV6's had all g's?? I already have a set of G and A's from a 3ltr elite so if worst comes to it i can use the g's from that and match with the other pair of g's.
Nope, MV6 Engine spec were the same as any other V6 in other models.
Some but not all Ex Plods had a 4 x G Cam set up.
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ah so the plot thickens!! So am i right in thinking the G's normally go on the exhaust side?
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Nope, Inlet, G Cams fitted to Inlets on 3.0 and 3.2 as standard, no G's on 2.5 or 2.6.
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Hi, apologies to hijack... so does that mean in a 2.5 when people say they 'fitted G cams' they may have fitted 2x or 4x Gs? Presumably there's a performance increase by fitting 4, not just two?
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I fitted 4 x G cams in my 2.5 V6 vectra.
Some say it will run lumpy but I found it ran very smooth, just needs the timing to be spot on!
You will def need the cam & crank locking kit to do this.
performance wise I didn't really notice much of an increase...you would get more power increase by fitting a 3.0 or 3.2 instead.
Or you could go 'Balls out' and do the Saab turbo conversion to your V6! :D
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Hi, apologies to hijack... so does that mean in a 2.5 when people say they 'fitted G cams' they may have fitted 2x or 4x Gs? Presumably there's a performance increase by fitting 4, not just two?
No just upgrade the 2 x G Cams as per the 3.0 Set Up, if you have the A Cams, then fit them as well while your there and got the thing in bits. Also fit the Inlet dividers from a 3.0 . This Mod is claimed to give around +20 Bhp and is one of the cheapest and most effective ways to get more power from your 2.5.
Having said it that, Ive never owned a 2.5 or fitted the Cam Mod, so I cant personally say, my views are why get a 2.5 when theres a 3.0 Flavour available, sorry 2.5 owners but thats just me.
On the 4 x G Cams side, slightly different story, unlikely your going to get much Bhp increase, if any, but on a 3.0/3.2 it should slightly change the Torque behaver across the Rev Range, probably losing some Torque at the lower end and a slight increase at the top of the range, which could be beneficial if your thinking of doing other Mods.
I read in the past on the Veccy Forums about members trying out different Cams setups on there 2.5, 2.6 and 3.2 on their Vectras with mixed feelings and results, all I can do is comment on a 3.0 Ex Police Omega I had with 4 x G Cams fitted, it was bloody quick, I didn't actually know it had 4 x G's until the top end was stripped, it also had widened Throttle Bodies, some gas flowing and porting from the TB's down to the Heads, as well as an ECU re Chip.
Bringing it all back down to Earth, you could say that the best way to get some extra horses out of your car, is to get back the Bhp that youve lost or not lose them in the first place with regular Servicing and Maintenance.
The 4 G plus Mods 3.0 Plod I referred to earlier, was in fact a low mileage (60k ish on a W Reg) and hadn't long left the Force, the Service Printout showed it to be serviced to 120K, so more on timescales than millage, so some might argue it was quick due the good Maintenance history and not the Mods done, whilst I wouldn't argue with that one, I personally think the Mods did make a difference, whilst it wasn't the most responsive just poddling around it did scream into action when floored, and would see of any other 3.0 or 3.2 that Ive driven. Im guessing the Mods were done within the Force Ownership (Met DPG SO16 Mob) as the Log Book was still in there name with 1 owner, either way its a shame the cars not around anymore.
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4 Gs over 2 Gs and 2 As gives no benefit. Not worth the effort.
2 Gs in a 2.5 is beneficial, but nowhere near a 3.0l lump, not even close. I've owned both side by side, albeit briefly as the 2.5 couldn't hack it, and decided to give up.
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2 Gs in a 2.5 is beneficial, but nowhere near a 3.0l lump, not even close. I've owned both side by side, albeit briefly as the 2.5 couldn't hack it, and decided to give up.
Agreed 2G's in a 2.6 is beneficial in that it gives you a little better performance higher up the rev range (useful for overtaking!) but as per above, I own a 2.6 with 2x G's and a 3.2 standard and the 3.2 is a far better performer anywhere in the rev range - from pulling away from stationary all the way to the red line.
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2 Gs in a 2.5 is beneficial, but nowhere near a 3.0l lump, not even close. I've owned both side by side, albeit briefly as the 2.5 couldn't hack it, and decided to give up.
Agreed 2G's in a 2.6 is beneficial in that it gives you a little better performance higher up the rev range (useful for overtaking!) but as per above, I own a 2.6 with 2x G's and a 3.2 standard and the 3.2 is a far better performer anywhere in the rev range - from pulling away from stationary all the way to the red line.
And at cruising speeds, the 3.0/3.2 just effortlessly take off in a way that a superchipped 2.5 with 2 Gs just couldn't.
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2 Gs in a 2.5 is beneficial, but nowhere near a 3.0l lump, not even close. I've owned both side by side, albeit briefly as the 2.5 couldn't hack it, and decided to give up.
Agreed 2G's in a 2.6 is beneficial in that it gives you a little better performance higher up the rev range (useful for overtaking!) but as per above, I own a 2.6 with 2x G's and a 3.2 standard and the 3.2 is a far better performer anywhere in the rev range - from pulling away from stationary all the way to the red line.
And at cruising speeds, the 3.0/3.2 just effortlessly take off in a way that a superchipped 2.5 with 2 Gs just couldn't.
Hmmmm.... Andy considers 3.2 Block with 2.6 Heads for his 2.6 ::)..... Mrs VXL considers Andy's life insurance policy and Pension fund followed by gentle but firm use of sledgehammer!
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2 Gs in a 2.5 is beneficial, but nowhere near a 3.0l lump, not even close. I've owned both side by side, albeit briefly as the 2.5 couldn't hack it, and decided to give up.
Agreed 2G's in a 2.6 is beneficial in that it gives you a little better performance higher up the rev range (useful for overtaking!) but as per above, I own a 2.6 with 2x G's and a 3.2 standard and the 3.2 is a far better performer anywhere in the rev range - from pulling away from stationary all the way to the red line.
And at cruising speeds, the 3.0/3.2 just effortlessly take off in a way that a superchipped 2.5 with 2 Gs just couldn't.
Hmmmm.... Andy considers 3.2 Block with 2.6 Heads for his 2.6 ::)..... Mrs VXL considers Andy's life insurance policy and Pension fund followed by gentle but firm use of sledgehammer!
That's where it went! Tell her that you can have your engine and I won't press charges for the kidnap of Sammy... ...and keep the frozen peas on hand for the swelling
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2 Gs in a 2.5 is beneficial, but nowhere near a 3.0l lump, not even close. I've owned both side by side, albeit briefly as the 2.5 couldn't hack it, and decided to give up.
Agreed 2G's in a 2.6 is beneficial in that it gives you a little better performance higher up the rev range (useful for overtaking!) but as per above, I own a 2.6 with 2x G's and a 3.2 standard and the 3.2 is a far better performer anywhere in the rev range - from pulling away from stationary all the way to the red line.
And at cruising speeds, the 3.0/3.2 just effortlessly take off in a way that a superchipped 2.5 with 2 Gs just couldn't.
Hmmmm.... Andy considers 3.2 Block with 2.6 Heads for his 2.6 ::)..... Mrs VXL considers Andy's life insurance policy and Pension fund followed by gentle but firm use of sledgehammer!
That's where it went! Tell her that you can have your engine and I won't press charges for the kidnap of Sammy... ...and keep the frozen peas on hand for the swelling
I think there's something she isn't telling me, Next to the Sammy was a pair of pink Crocs and a Fuse in an envelope marked 'Newent 2013'.
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it will be interesting later this month for me when im doing another rolling road day with my lad and MK3AstraOC. The last one i did i'd fitted sport cats, poweflow exhaust, pipercross air filter and came out with 185.7bhp. The guy running it told me i could attribute most of the power gain to the cats and i left a happy bunny. Since then ive done 4 bar regulator, Magnecor leads, 3.2 plugs, stage 7 motorsport chip, modified throttle body and the car feels much quicker and much more responsive. My reasoning behind the RR day is that i want to know what i'm at now and then do the G cam mod and 2.6/3.2 exhaust manifolds mod then do another RR to see where these will take me to.
Whilst i appreciate the comments regarding going for a 3.0/3.2 over the 2.5 for the power there is the downside that the larger engines in my past experience drink far more. I use mine for commuting to and from work on A and B roads and still return 29-30 to the gallon. When i did the same in the 3.0 i was lucky to see 24-25 and i was doing the same journey driving just the same.
I'll put my rolling road results up when we've been later in the month.
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I've been following the conversation here trying to find bits of info we can apply to our Cadillac Cateras and their 3.0L V6s. Could you tell me how a 3.0 with 2xG is different from one with 4xG? Considering our ECU limits the Catera to a 120 MPH top speed, my goal would be increased acceleration, a quicker ET, more overtaking power. Our ECU cannot be chipped so we have to make HP & Torque the old fashioned way, with bumpy sticks, bigger pots, and more squish.
Marks DTM Calib turned me on to the 3.2L block with 2.5L heads. He said using the G intake cams on the 2.5L head was the way to go. I didn't know about the different cams and now I find you guys talking about 4xG vs. 2G/2A cams. Would a 3.2/2.5 mutt motor like that benefit more from 4xG or 2xG/2xA cams as far as mid-range torque goes?
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"A little knowledge can be a dangerous thing."
I gleaned a little knowledge about camshafts following you guys, made the mistake of digging deeper, and found this:
(http://images.omegaowners.com/images/guides/v6_cam_ident/S_6_07.jpg)
The chart lists the X30XE's 2x"G" & 2x"A" cams but there's no mention of the 4x"G" option. Forgive my ignorance but does 4x"G" mean using "G" intake camshafts as both intake and exhaust? Try not to laugh at the stupid Yank but I'd rather ask a dumb question now than do something even dumber later.
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"A little knowledge can be a dangerous thing."
I gleaned a little knowledge about camshafts following you guys, made the mistake of digging deeper, and found this:
(http://images.omegaowners.com/images/guides/v6_cam_ident/S_6_07.jpg)
The chart lists the X30XE's 2x"G" & 2x"A" cams but there's no mention of the 4x"G" option. Forgive my ignorance but does 4x"G" mean using "G" intake camshafts as both intake and exhaust? Try not to laugh at the stupid Yank but I'd rather ask a dumb question now than do something even dumber later.
4 x G's Was never an option.
Yes, 4 x G's on Inlet and Exhaust.
Thanks, the pic link can be found here, which is a sticky in OOF Maintenance Guide -
http://www.omegaowners.com/forum/index.php?topic=90500.0
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Thanks Zirk. I've learned a lot over that last few days. Now I've got to convince my cousin the Ace Mechanic to build me a Frankenstein V6 from a 3.2L block with 2.5L heads, 3.0 4x"G" cams, and all the rest. If it happens I'll come back and report. Please be patient, it may take a while. :)
(http://www.theme-party-palace.com/images/frankenstein.jpg)