Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Steve1077 on 31 March 2008, 19:57:21
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I've read about the dual ram air system on the V6 and I have a rough idea how it works, I just checked the operation of the front multi-ram actuator and it opens and stays open until I stop revving the engine, then I checked the one at the back and it opens but shuts immediately even if I hold the revs, the question is should the rear actuator stay open like the one at the front? I was only checking it as the guy that fitted my cam belt broke the front vacuum reservoir pipe off, I’ve glued it back on and have a new one on order, but I know the rear actuator has never stayed open.
Thanks
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I've read about the dual ram air system on the V6 and I have a rough idea how it works, I just checked the operation of the front multi-ram actuator and it opens and stays open until I stop revving the engine, then I checked the one at the back and it opens but shuts immediately even if I hold the revs, the question is should the rear actuator stay open like the one at the front? I was only checking it as the guy that fitted my cam belt broke the front vacuum reservoir pipe off, I’ve glued it back on and have a new one on order, but I know the rear actuator has never stayed open.
Thanks
Sounds OK.
And its a Multiram on V6, Dual Ram is that contraption fitted to the straight 6 fitted to rustbuckets Senators/Carltons
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DOH! I did have a 24 valve Senator, lol, it was so much faster than the Omega, but thats another story, maybe it was because of all the rust, lol, only half the weight it should be.
Well thanks for the reply, I just spent the last hour checking everything and moving bits around, the actuator at the back doesn't always move when I rev it, seems to move when it wants to, and as I said when it does move its only for a second, does that change under load or something? I have to say it was like a slug with the pipe broken, seems better now
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DOH! I did have a 24 valve Senator, lol, it was so much faster than the Omega, but thats another story, maybe it was because of all the rust, lol, only half the weight it should be.
Well thanks for the reply, I just spent the last hour checking everything and moving bits around, the actuator at the back doesn't always move when I rev it, seems to move when it wants to, and as I said when it does move its only for a second, does that change under load or something? I have to say it was like a slug with the pipe broken, seems better now
I remain unconvinced - it may have seemed faster due to its naff power delivery...
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My Monza's definately quicker than my Estate ;) Or perhaps it just seems that way? S'funny 'cos I let a mate have a go in the Meega and I sat in the back (just to see what it was like you understand) and it felt like it went like the clappers ;D It's all relative I suppose.
Humpy
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DOH! I did have a 24 valve Senator, lol, it was so much faster than the Omega, but thats another story, maybe it was because of all the rust, lol, only half the weight it should be.
Well thanks for the reply, I just spent the last hour checking everything and moving bits around, the actuator at the back doesn't always move when I rev it, seems to move when it wants to, and as I said when it does move its only for a second, does that change under load or something? I have to say it was like a slug with the pipe broken, seems better now
I remain unconvinced - it may have seemed faster due to its naff power delivery...
The Omega gives a much smoother delivery, and IS prob faster but.
No Omega put the smile on my face that the Senny did, it was very enjoyable to drive. That 4k surge made the smile even more!
Multi-rams just make it boooooring (from a sensation & enjoyment point of view) gets you there faster, but not as fun ;)
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out where it counts on the racetrack there hasnt yet been an omega thats quicer than any of the ssixs!!! sorry guys
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If you can see the rear ram opening breifly when reving the engine, all is ok as it is vacuum load dependant. With the engine off load i.e on the drive the required vacuum load is only there breifly not like it would be if you had you boot on the floorboards when driving.
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DOH! I did have a 24 valve Senator, lol, it was so much faster than the Omega, but thats another story, maybe it was because of all the rust, lol, only half the weight it should be.
Well thanks for the reply, I just spent the last hour checking everything and moving bits around, the actuator at the back doesn't always move when I rev it, seems to move when it wants to, and as I said when it does move its only for a second, does that change under load or something? I have to say it was like a slug with the pipe broken, seems better now
I remain unconvinced - it may have seemed faster due to its naff power delivery...
I've had many a Senator and Omega, and much as i love the Omega (reliable old bus), the 3.0 24v Senators I have had have been quicker than any of my Omegas, though I've never owned a 3.2.
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I think the multiram setup on the omega is far smoother that the dualram of the S6 Senators and Carltons (also 2.0 Vectra's had an implementation called VIM or Variable intake manifold).
Because of the smoothness of the multiram the acceleration seems pretty straight throughout whereas the Dual and Variable setups have distinct points when the rams actuate and the difference is felt.
Marks post - http://www.omegaowners.com/forum/YaBB.pl?num=1153840176 - explains how this smoothness is achieved with four modes of operation.
Perhaps a Straight 6 - V6 Santa Pod event is in order! Though I think the overall difference would be minimal, there are other factors such as weight, gearbox and diff that would make a bigger difference.
I'll get my coat now.
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I have not had the pleasure of driving a Senator sadly :'( but I imagine it would probably accelerate faster up to 60 than an Omega which is a heavy beast! However an Omega has excellent drag co-efficient and gets better the faster it goes ;) so I reckon it would even things up at the top end!
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Senator and Omega are the same weight give or take a few Kg.
It's probably better distributed on an Omega given that most of the engine on the Senator is ahead of the front wheels.
Whilst a big step in the torque curve makes a car feel fast it's the area under the curve and the ability of the gearbox to let you use it that matters against the clock.
Kevin
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Senator and Omega are the same weight give or take a few Kg.
It's probably better distributed on an Omega given that most of the engine on the Senator is ahead of the front wheels.
Whilst a big step in the torque curve makes a car feel fast it's the area under the curve and the ability of the gearbox to let you use it that matters against the clock.
Kevin
and the Omega will be faster through the wiggly bits thanks to a better weight distribution.
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out where it counts on the racetrack there hasnt yet been an omega thats quicer than any of the ssixs!!! sorry guys
Forgetting your race prepped senny, be interesting to put a senny up against an omega - I think you'll find little in it, perhaps Omega just having the edge. Handling wise I guess its what you prefer - Senny a bit tail happy, Omega less so.
Would be interesting...
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out where it counts on the racetrack there hasnt yet been an omega thats quicer than any of the ssixs!!! sorry guys
Forgetting your race prepped senny, be interesting to put a senny up against an omega - I think you'll find little in it, perhaps Omega just having the edge. Handling wise I guess its what you prefer - Senny a bit tail happy, Omega less so.
Would be interesting...
i thought the same thingwhile reading the thread last night,abs contacts maybe interested ? :)
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well there will be a few Omegas at the next traxkday on the 14th many of them tweaked for the day with suspension and engine mods so will see how they do, can tell you the senny hit 157 down the straight and the omegas seemed to struggle to reach 150 both the manual omega and the 2 auto ones were in the same boat last time,
senny is definetly quicker round the twisty bits but i will admit mine is
built for the twistys so that may not count, all speeds quooted were on the speedos and may not be genuine speeds but hey we were having fun!!!
Omegatoy
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which track ?
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Not a track as such..... RAF Marham I presume:-
http://uk.youtube.com/watch?v=axI-xPRs6Po
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sure is have a look!!!!
http://uk.youtube.com/watch?v=8z2SMuv8GhA :y
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I would hate your tyre bill, lol
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GC, Who does the prefacelift Omega belong to on ABS? (the one sitting on a trolley jack at the end of the link I posted)
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I have owned 2x Sennys and my first Omega.
I would say the hanndling goes to the Omega although it is a ex plod car so may be better set up. The brakes are also much firmer when pushed. If it was grin factor it goes to the Senny. It seemed to fly when it hit 4k and just kept on going. The Omega is probably as quick as make no difference just more smooth in delivery.
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With no traction control it sure made it fun sliding the back around corners, the Senator was about 100 kg lighter, it just seems a lot faster from a stand, although mine could well have been tweaked, the suspension was very stiff on mine and hardly anything beat it at the lights, so many 911's got caught out not paying attention, you could see the look on their faces, it really pissed them off, the Omega does seem pull better at lower revs though
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GC, Who does the prefacelift Omega belong to on ABS? (the one sitting on a trolley jack at the end of the link I posted)
thats Malcom Robbs whose normal trackday car is his L.C he spent all day ringing the tits off the manual 3.0 omega but just couldnt get it to keep up with the sennys and carltons and i have to say Malc is a hell of a driver certainly not afraid to give it large but the car jst didnt have it its done 89000 miles so maybe its not freed off yet??? :y