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Home > Help Needed / General Tech Chat > Min bore size for MAP, DV, boost gauge..

Yo-Han

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North of the Netherlands

13th Dec, 2011 at 08:19:08pm

I've found some nice 90 deg angled Festo connectors at work that I was thinking about using in my manifold to hook up MAP sensor, dump valve, boost gauge and idle valve.

However ID bore size is 2.3mm and that of the DV and idle valve are about 3.5mm.

I searched and found people use vac hoses of anywhere between 1.5 (extrema case I think) to 6mm.
On the MS forum I recall reading 3mm ID.

Anybody any idea if using just over 2mm ID will create issues when using this for above?

Dazed and Confused....

BENROSS

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13th Dec, 2011 at 10:00:03pm

i think you will be fine!

Paul S

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Podland

13th Dec, 2011 at 10:09:21pm

I doubt that 2mm will be enough for the idle valve.

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."

Yo-Han

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14th Dec, 2011 at 07:45:09am


Thanks for your reactions.

On 13th Dec, 2011 Paul S said:
I doubt that 2mm will be enough for the idle valve.


Why is that Paul?

Initialy I thought it might be a bit slow as there is servo-ish construction with a volume that needs to be 'vucuumed' hence a larger ID would allow volume to be drawn out faster.
However having a DV placed for initial boost dump then have the idle valve taking over, there should be enough time for the idle valve to pick up.

Dazed and Confused....

Yo-Han

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14th Dec, 2011 at 07:51:30am

Ready back the above I think I should have made more clear I ment the idle valve (part throttle valve) needed for a blow through supercharger set-up:


I did not mean the ACV; is that what you were commenting on Paul?

Dazed and Confused....

Paul S

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Podland

14th Dec, 2011 at 05:20:08pm

I was commenting on the idle valve. What you are taliking about is a bypass valve. If there is no flow, then you should be OK.

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."

Yo-Han

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North of the Netherlands

15th Dec, 2011 at 08:30:57am

You're correct Paul, it's a bypass valve.
I copied the wording from another thread without thinking about creating confusion.

Thanks for you comments though.

Dazed and Confused....

wil_h

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15th Dec, 2011 at 08:34:06am

I found that I needed 4mm to get my dumpvalve dumping.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



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.


Yo-Han

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18th Dec, 2011 at 11:39:41am

That's quite a bit larger then hoped for.
Was that some special application Wil?
I am fitting an ordinairy Forge FMDV001.

Dazed and Confused....
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