Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: minifreek on 23 March 2016, 13:42:46

Title: List of cams fitted...?
Post by: minifreek on 23 March 2016, 13:42:46
Has anyone got a list of cams that are fitted to the V6 engines...?

Im toying with the idea of changing 2 of the G cams (I currently have 4 fitted) and fitting 2 A cams ...

Trying to get back some lost torque....

Going to get the engine running as it should do once the CTS (on order) has been replaced, coz its being in PITA to start in a mornings....
Title: Re: List of cams fitted...?
Post by: zirk on 23 March 2016, 13:46:50
FAQ section. If its not in there its in the other one.
Title: Re: List of cams fitted...?
Post by: minifreek on 23 March 2016, 16:38:28
I shall go looksee :) Thanks
Title: Re: List of cams fitted...?
Post by: minifreek on 24 March 2016, 10:06:43
It looks like I need a pair of A cams fitted, I dunno which I removed when I changed to the G cams. I'll dig them out and see which Iv got....
Title: Re: List of cams fitted...?
Post by: Diamond Black Geezer on 24 March 2016, 10:33:17
Should be 'A' you removed.

2.6s have 'J' cams, I think
Title: Re: List of cams fitted...?
Post by: minifreek on 24 March 2016, 12:47:22
I'll have a look later when I change the CTS...

I found a list that Iv seen before and the 2.5 V6 has E cam (exhaust) and F cam (inlet)...

I can only look at the ones I took out...
Title: Re: List of cams fitted...?
Post by: zirk on 24 March 2016, 12:55:47
Quote from: minifreek on 24 March 2016, 12:47:22
I'll have a look later when I change the CTS...

I found a list that Iv seen before and the 2.5 V6 has E cam (exhaust) and F cam (inlet)...

I can only look at the ones I took out...
Check the list is for the Omega, they do seem to differ for Vectra, Cavalier, Calibra, etc, and Year related.
Title: Re: List of cams fitted...?
Post by: jimbo125 on 25 March 2016, 23:50:06
2.5 has E cams on exhaust F cams on inlet and 3.0 has A cams on exhaust with G cams on inlets IIRC no need for four G cams :y

Hope this helps :)
Title: Re: List of cams fitted...?
Post by: zirk on 26 March 2016, 07:10:03
Quote from: jimbo125 on 25 March 2016, 23:50:06
2.5 has E cams on exhaust F cams on inlet and 3.0 has A cams on exhaust with G cams on inlets IIRC no need for four G cams :y

Hope this helps :)
As you say G and A on the 3.0's, some folk fitted 4 x G's in order to squeeze a bit more umph from the top end with or without other mods, with mixed results. 
Title: Re: List of cams fitted...?
Post by: minifreek on 26 March 2016, 10:20:39
The problem I found with fitting the 4 x G cams was the loss of low down torque, tried to combat that by fitting the long nose plenum. It helped - a lot - and the cams switch on at around 3,500 revs, but that is also when the flaps open on the inlet.... which I can only presume will be the high speed flaps opening...

I tried experimenting with wiring open the flaps permanently, which did tend to work but again a loss of low down torque again until around 2,500 revs there was mid range flat spot, then the cams switch on at 3,500 revs and the power could be felt.... with a nice shove in the back and it pulls well to over the posted speed limits on a private test track.... :y

I shall source a pair of A cams and go from there...

This BTW is not a search for power, but an experiment to see which suits the 2.5 V6 for power and torque whilst towing a single axle 1.45 tonne caravan (fully loaded)....
Title: Re: List of cams fitted...?
Post by: zirk on 26 March 2016, 10:25:08
Quote from: minifreek on 26 March 2016, 10:20:39
The problem I found with fitting the 4 x G cams was the loss of low down torque, tried to combat that by fitting the long nose plenum. It helped - a lot - and the cams switch on at around 3,500 revs, but that is also when the flaps open on the inlet.... which I can only presume will be the high speed flaps opening...

I tried experimenting with wiring open the flaps permanently, which did tend to work but again a loss of low down torque again until around 2,500 revs there was mid range flat spot, then the cams switch on at 3,500 revs and the power could be felt.... with a nice shove in the back and it pulls well to over the posted speed limits on a private test track.... :y

I shall source a pair of A cams and go from there...

This BTW is not a search for power, but an experiment to see which suits the 2.5 V6 for power and torque whilst towing a single axle 1.45 tonne caravan (fully loaded)....
As you say, fitting A cams on the Exhaust will probably help with the lower Torque.

Got a pair here if your interested.
Title: Re: List of cams fitted...?
Post by: minifreek on 27 March 2016, 14:30:08
I'll dig out the cams I removed when changed to the G's just to make sure which Iv got...

I'll take you up on them if the price is right :y
Title: Re: List of cams fitted...?
Post by: minifreek on 28 March 2016, 12:01:27
Iv found the cams I removed in order to fit the G cams, they are E & F cams... so am in the market now for a pair of A cams.....




ZIRK.... if you will please :y :y :y :y :y :y :y :y :y :y :y
Title: Re: List of cams fitted...?
Post by: zirk on 28 March 2016, 12:02:48
Quote from: minifreek on 28 March 2016, 12:01:27
Iv found the cams I removed in order to fit the G cams, they are E & F cams... so am in the market now for a pair of A cams.....




ZIRK.... if you will please :y :y :y :y :y :y :y :y :y :y :y
Ok, pm on its way.