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[mr carl]

someone other than me must have thought of doing this before....

i dont want "better fuel consumption" or a "flattened torque curve"

if i wanted either of these things i would have bought a diesel corsa

someone on this site must have removed theirs at some point, how did you do it?

i want to hear, why i should leave the multirams alone, and i want to hear other reasons why i should rip out/bypass the whole thing

[feeutfo]

Leave it alone!

Because it can not be, has not been, and will not be improved upon for this application. Thats why it is the way it is! Gm RnD ain't daft.

Perhaps a better approach would be to say why you think it should be changed. What you want to achieve and why...?

If it's for track work then fine, rip it out, chip it, make it all top end, and ragthe tits off it in every gear. But for road I big lump like the omega needs grunt to get going. Which is what the multi ram system gives you along with top end as well.

Induction tuning isn't a simple thing to get right afaik.

If you want to see what its like without it, disconnect the plug and or vac pipes to it and go for a spin. It's flat as a witches tit.

[mr carl]

Leave it alone!

Because it can not be, has not been, and will not be improved upon for this application. Thats why it is the way it is! Gm RnD ain't daft.

Perhaps a better approach would be to say why you think it should be changed. What you want to achieve and why...?

If it's for track work then fine, rip it out, chip it, make it all top end, and ragthe tits off it in every gear. But for road I big lump like the omega needs grunt to get going. Which is what the multi ram system gives you along with top end as well.

Induction tuning isn't a simple thing to get right afaik.

If you want to see what its like without it, disconnect the plug and or vac pipes to it and go for a spin. It's flat as a witches tit.

lol is it really that bad without it connected? its not as simple as just dissconnecting it though otherwise i would have tried it..
surly it would have to be bypassed otherwise the valves would stay shut?

[Martin_1962]

Why would they spend a lot on the induction system unless it was beniificial.

Some of the valves improve high RPM air intake

[albitz]

you could do an experiment - take it off and just have two big flexible pipes sticking out the from where the grill would be and running back to the intake at the throttle bodies. Then take it for a blast and see what happens.proof of the pudding etc....

[mr carl]

Why would they spend a lot on the induction system unless it was beniificial.

Some of the valves improve high RPM air intake

thats exactly what i thought, but then with more thought i came to the conclusion that the calibra/cav works just fine without the multi ram

"why would they spend a lot on the induction system unless it was beniificial"

i dont know, you tell me?

when tuning for power one normally takes out all restrictions and most even go as far as shaving off fractions of a mm off the throttle plates, and even removing the traction control.

i have read that the multiram is there to help fuel consumption and flatten the torque curve....why is this benificial?

[feeutfo]

Leave it alone!

Because it can not be, has not been, and will not be improved upon for this application. Thats why it is the way it is! Gm RnD ain't daft.

Perhaps a better approach would be to say why you think it should be changed. What you want to achieve and why...?

If it's for track work then fine, rip it out, chip it, make it all top end, and ragthe tits off it in every gear. But for road I big lump like the omega needs grunt to get going. Which is what the multi ram system gives you along with top end as well.

Induction tuning isn't a simple thing to get right afaik.

If you want to see what its like without it, disconnect the plug and or vac pipes to it and go for a spin. It's flat as a witches tit.

lol is it really that bad without it connected? its not as simple as just dissconnecting it though otherwise i would have tried it..
surly it would have to be bypassed otherwise the valves would stay shut?

It connects the two sides of the intake, or not, depending. Same as the one in the plenum which connects the two sides.  It doesn't shut anything off at all.
So why is not simple? Take the intake off and look for yourself...
 :-?

[mr carl]

you could do an experiment - take it off and just have two big flexible pipes sticking out the from where the grill would be and running back to the intake at the throttle bodies. Then take it for a blast and see what happens.proof of the pudding etc....

it would have to be more controlled than that though due to the placebo effect...

someone somewhere has done this, i just want to know their story, what conclusion they have come to with their handy work.

what are the pro's of removing the multi rams, what are the con's...did they put it on the rollers etc etc...

[mr carl]

Leave it alone!

Because it can not be, has not been, and will not be improved upon for this application. Thats why it is the way it is! Gm RnD ain't daft.

Perhaps a better approach would be to say why you think it should be changed. What you want to achieve and why...?

If it's for track work then fine, rip it out, chip it, make it all top end, and ragthe tits off it in every gear. But for road I big lump like the omega needs grunt to get going. Which is what the multi ram system gives you along with top end as well.

Induction tuning isn't a simple thing to get right afaik.

If you want to see what its like without it, disconnect the plug and or vac pipes to it and go for a spin. It's flat as a witches tit.

lol is it really that bad without it connected? its not as simple as just dissconnecting it though otherwise i would have tried it..
surly it would have to be bypassed otherwise the valves would stay shut?

It connects the two sides of the intake, or not, depending. Same as the one in the plenum which connects the two sides.  It doesn't shut anything off at all.
So why is not simple? Take the intake off and look for yourself...
 :-?

so its just two metal tunnels?

i didnt know that, if you dont ask questions then you dont learn 

and if no one ever said "what if i did that" we would be stuck in the stone age.....i like to ask questions, i like to learn and discover lol 

[TheBoy]

I see enough Omegas with non-functional multirams, and they are gutless.  Owners are always amazed at the difference when you fix it.


To test, simply remove the vac pipe between the solenoid and the actuator. Flat as a Witch's Tit will be your conclusion.


The intake on the Omega is actually not that limiting. Far from it. Every single attempt I've seen to 'improve' it, staying normally aspirated, has been a downgrade.


Lastly, just because the likes of those retards at Courtney Sport say something will improve things, that doesn't make it so.  A proper tuning company is a different story, but note that no proper tuning company has made a new intake for the Omega

[mr carl]

I see enough Omegas with non-functional multirams, and they are gutless.  Owners are always amazed at the difference when you fix it.


To test, simply remove the vac pipe between the solenoid and the actuator. Flat as a Witch's Tit will be your conclusion.


The intake on the Omega is actually not that limiting. Far from it. Every single attempt I've seen to 'improve' it, staying normally aspirated, has been a downgrade.


Lastly, just because the likes of those retards at Courtney Sport say something will improve things, that doesn't make it so.  A proper tuning company is a different story, but note that no proper tuning company has made a new intake for the Omega

sweet, i will give it a go.....but also note, no one makes a simple back box for a omega either 

[feeutfo]

Let me ask you a q or two then.

Why mess with something that ain't broke?

Why assume I five minute fiddle would make it better, over god knows how many hours of development to tune an engine to a certain size and weight car designed for carrying passengers in comfort as quickly as possible?

Why does the " slap on a cone filter "(I realize that's not the question but the mentality is the same) approach automatically mean it must be better?

Why not take the approach that GM must have put it there for good reason.

What I really want to know is, why does re connecting the two sides of the previously split intake post maf affect the power delivery?

I suspect it's to do with intake flow rates at high and low rpm. Why exactly that is I'm not sure. Knowing the positions of the m.ram valves at certain rpm would give a clue I suppose. Difficult to tell when it's all fitted together though.

 Awaits a post from master DTM... And runs off to look at the guide in maintenance. 

[TheBoy]

Let me ask you a q or two then.

Why mess with something that ain't broke?

Why assume I five minute fiddle would make it better, over god knows how many hours of development to tune an engine to a certain size and weight car designed for carrying passengers in comfort as quickly as possible?

Why does the " slap on a cone filter "(I realize that's not the question but the mentality is the same) approach automatically mean it must be better?

Why not take the approach that GM must have put it there for good reason.

What I really want to know is, why does re connecting the two sides of the previously split intake post maf affect the power delivery?

I suspect it's to do with intake flow rates at high and low rpm. Why exactly that is I'm not sure. Knowing the positions of the m.ram valves at certain rpm would give a clue I suppose. Difficult to tell when it's all fitted together though.

 Awaits a post from master DTM... And runs off to look at the guide in maintenance. 

In simplistic terms, you tune the engine power with the length of the intake (eg, remember YPVS on 1980s Yamahas).  The multirams, in effect, are adjusting the intake length.

[feeutfo]

 

http://www.omegaowners.com/forum/YaBB.pl?num=1153840176

[TheBoy]

I see enough Omegas with non-functional multirams, and they are gutless.  Owners are always amazed at the difference when you fix it.


To test, simply remove the vac pipe between the solenoid and the actuator. Flat as a Witch's Tit will be your conclusion.


The intake on the Omega is actually not that limiting. Far from it. Every single attempt I've seen to 'improve' it, staying normally aspirated, has been a downgrade.


Lastly, just because the likes of those retards at Courtney Sport say something will improve things, that doesn't make it so.  A proper tuning company is a different story, but note that no proper tuning company has made a new intake for the Omega

sweet, i will give it a go.....but also note, no one makes a simple back box for a omega either 

What, decatted with no silencers?  I'll think you find they do  .  In fact, I know someone looking at getting rid of one, and putting a normal, cheap exhaust on in order to recover a whole heap of lost power from the car caused by 'upgrades'.