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Home > Technical Chat > where to place the turbo?

miniminor63

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1849 Posts
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The oversills police

Oslo, Norway

Hi

As titled really.













I would like to have it on the left hand side for weight distribution (RHD circuit car), but I am afraid that the beltdrive for the cams might get hot, and also the tube routing for the exhaust might be complicated. The exhaust manifold will consist of 4-1 Primaries 1-5/8” OD x 23” long, so I will have to snake the tubing in there someplace and also need to put the exhaust from the turbo as well as an external wastegate in there.

Any suggestions appreciated, I am a bit lost on this one...


minimole23

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Wiltshire

Out the bonnet somewhere?

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding


miniminor63

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1849 Posts
Member #: 672
The oversills police

Oslo, Norway

need to be under the bonnet really. Could of course make some bulges on it, but would like to avoid that, and I think it should be possible to avoid it as well.


Paul S

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Podland

Obviously in the "Weber" box at the back. Nice and central and a free area.

Interesting choice of manifold pipe sizes.

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wil_h

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I'm with Paul on posttion, but depending on what turbo you are using, getting it low down the back will be best for CofG.

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On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


miniminor63

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1849 Posts
Member #: 672
The oversills police

Oslo, Norway




On 8th May, 2011 Paul S said:
Obviously in the "Weber" box at the back. Nice and central and a free area.

Interesting choice of manifold pipe sizes.


might be able to squeeze all that pipe and the turbo in there, but wont it be VERY hot inside the box there then with nowhere for the heat to go???

Also, what do you think about the sizing, bearing in mind all your simulations?

Many thanks for your answers!


apbellamy

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Passenger footwell?

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i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


Paul S

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On 8th May, 2011 miniminor63 said:

Also, what do you think about the sizing, bearing in mind all your simulations?



The simulations seem to suggest that, in length terms, whatever works for NA, works for turbo.

However, bore wise then you need to go a bit smaller than normal NA.

Roughly speaking, the length determines the frequency of the reflected pulses, the bore determines the amplitude of the pulses.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


miniminor63

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1849 Posts
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The oversills police

Oslo, Norway




On 8th May, 2011 apbellamy said:
Passenger footwell?


too many tubes obstruct that. Also it would mean major surgery to include that as a part of the outside and not the inside of the car (due to series regulations)


miniminor63

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The oversills police

Oslo, Norway




On 8th May, 2011 Paul S said:

On 8th May, 2011 miniminor63 said:

Also, what do you think about the sizing, bearing in mind all your simulations?



The simulations seem to suggest that, in length terms, whatever works for NA, works for turbo.

However, bore wise then you need to go a bit smaller than normal NA.

Roughly speaking, the length determines the frequency of the reflected pulses, the bore determines the amplitude of the pulses.


should not be too far off then. This was calculated by a company that deals with manifolds and sells tube to make them. They needed quite a bit of information like cam details, bore, stroke, cross section areas and the like.

what do you think about the temperature issue that would arrise if I place the turbo in the miglia box in the bulkhead?


Paul S

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It'll burn the paint off in no time!

Could you not locate the turbo within the bonnet line and loop the tubes through the Miglia box?

I can see that one of the problems is that the ports are level with the cross member, so making pipe routing awkward.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


miniminor63

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The oversills police

Oslo, Norway

ports are slightly above the cross member level, so its not that bad. I could also angle the engine somewhat. It will burn the paint off with just the tubes as well I guess though.

I have wiring and brake pipes inside there (movable of course) which will suffer with the heat also...


Paul S

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Formerly Axel

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You could also put a big rad on the right and the turbo on the left to balance it out.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."


miniminor63

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The oversills police

Oslo, Norway

might be a possibility that! I think it will be easier to place the turbo on the opposite side to the belt, and then I could of course put the rad where it usually is.

Edited by miniminor63 on 8th May, 2011.


miniminor63

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The oversills police

Oslo, Norway

been out looking at the possibility of having the radiator by the belt. I have room for a large one, say 40x50 cmx 50 mm thick, but it would need to be placed along the brace bar and there will not be much room for any efficient ducting I think, so back to the drawing board??

I could also go with an Oil less turbo, so could be placed down low, or with the axle vertical if that helps...


johnK

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Norfolk

you need to show us the turbo Andre - if its bigger than the disco potato on mine you may struggle to get it up high like mine is!

ps - if you need any big valves I have a box full - give us a bell

JK

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it would probably be like this one!


miniminor63

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1849 Posts
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The oversills police

Oslo, Norway

its pretty much the same dimensions as a GT2871. The compressor side is either 7" or 7.75" across depending on which unit we pick.

Edited by miniminor63 on 9th May, 2011.


Carlzilla

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Quarry Bonk

Is it possible to place another boxing below the crossmember to accomodate it there above the diff? as im guessing youre not having a heater...

Edited by Carlzilla on 9th May, 2011.

On 26th Jan, 2012 Tom Fenton said:
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miniminor63

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The oversills police

Oslo, Norway

not a bad idea that, but it will make it difficult to get to, also I need to measure to check if the room there could be large enough.


matty

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Aylesbury

I'd put it where Johnk has his. There should be plenty of room, especially with the bulkhead box you have.

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miniminor63

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1849 Posts
Member #: 672
The oversills police

Oslo, Norway

Cant see how I can manage to fit all the exhaust manifold I want with that placement. I need to get the heat away from the head as this will be used for 30-40 minute races


pinkyandnobrain

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Pretoria South Africa

Turbo over clutch, front mount rad and massive nic style ducted IC on the belt side ?

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miniminor63

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1849 Posts
Member #: 672
The oversills police

Oslo, Norway

yes, might be a possibility.

Right now I am leaning towards having the turbo over the clutch, and either just go with a front rad and intercooler, or place one of them on the other side of the engine.

The turbo wont be too heavy either as it has an aluminum center section instead of cast. I can also get it with stainless turbine housing if I wish, but it is costly


george91

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janspeed style sounds like the best solution if your unhappy about putting it where John has his.

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