Is this possible?

[legvw 0]

I've read and heard that the later 24v plastic inlets can cope with up to 1 bar of boost pressure, so how come this fella is boosting at 25psi, and has got over 500whp, running a standard inlet??

http://www.gulfcoasteuros.com/forums/index.php?showtopic=41098

Is this doggy do do that needs to be ignored, or is the boost limit on standard manifolds too low??

Please help!

[craggsy 91]

Interesting as i was also told about a bar is max. Personally i wouldnt like to try

[bungy 2]

mxdzqETBPBY

[UnitedMotorsport 55]

It all depends on how the air is delivered to the intake manfiold. If it is a very linear increase in pressure vs a harsh increase in pressure.

[legvw 0]

That looks like a slightly different maniflod in that vid? Or is that my eyes?

I'm almost tempted to try a standard manifold, at a bar of boost, to see how reliable it is.. maybe conduct an experiment?

[legvw 0]

It all depends on how the air is delivered to the intake manfiold. If it is a very linear increase in pressure vs a harsh increase in pressure.

Interesting.... makes sense though.

[UnitedMotorsport 55]

Yeah I think you should. I tuned a ~500hp Rotrex R32 at 1 bar and it had no problems at all.

The picture above is an American 12v intake.

[bungy 2]

I'm sure that if the air is delivered in a linear way like Matt describes things will hold but if it is introduced in an aggressive way the shock loading will part something. It would be interesting to see what they can take. I think the manifold in the clip is an American one.

[bungy 2]

I think I was a bit slow with my post there and just ended up repeating what was already said. Sorry...

[russj249 2]

Can these engines take more boost than a standard 12v AAA engine on standard internals? always seems that only in America can they run silly boost on stock internals with only a head spacer.

[craggsy 91]

I can uderstand a charger being able to run more boost due to how they work increasing boost gradually.....but would a, just for arguments sake, a turbo R32 force more air into it that much quicker to 'burst' it, so to speak

[UnitedMotorsport 55]

Can these engines take more boost than a standard 12v AAA engine on standard internals?

No' date=' because these engines are more efficient than the 12v, it actually takes less boost to break them. The 24v and 12v run the same conrods as stock.

always seems that only in America can they run silly boost on stock internals with only a head spacer.

Not only in America is big power made on stock internals and a spacer plate. I and a handful of my friends have run engines like that for many years between 400 and 500hp

[legvw 0]

I've made my mind up, i'm going to run the standard inlet, obd2 throttle body, and make an exhaust manifold to under-sling the turbo (a sort of spa copy).

Also, using stock internals and a UM spacer plate, run at 1 bar of boost to try and achieve 400bhp.

Another thing, does anyone know how the flap in the inlet is controlled? When its supposed to 'open'? Can it be diy controlled?

[Daverse 175]

sounds good!

im not sure what flap you mean, but im sure a stepper motor of some kind would suffice?

[Lukey. 381]

24v have a VGI as stock, that flap

[UnitedMotorsport 55]

Does anyone know how the flap in the inlet is controlled? When its supposed to 'open'? Can it be diy controlled?

The flap is controlled by vacuum. There is a solenoid valve between a vacuum tank and the control mechanism on the manifold. Use this to control when the flap changes over.

When the flap should change over depends on a lot of things and should be determined by the person tuning your engine.