F1 Pneumatic Valve Spring, a closer look

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
Brett54
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Re: F1 Pneumatic Valve Spring, a closer look

Post by Brett54 » Fri Dec 30, 2016 6:31 am

Why a separate unit that bolts ONTO the head, rather than components that fit into a bore in the head casting (aka RA806E)?

Brett54
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Re: F1 Pneumatic Valve Spring, a closer look

Post by Brett54 » Tue Jan 03, 2017 6:37 am

Brett54 wrote:Why a separate unit that bolts ONTO the head, rather than components that fit into a bore in the head casting (aka RA806E)?
Is this from a Cosworth TJ V10 with Beam Head?

Facts Only
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Re: F1 Pneumatic Valve Spring, a closer look

Post by Facts Only » Tue Jan 03, 2017 5:53 pm

Brett54 wrote:
Brett54 wrote:Why a separate unit that bolts ONTO the head, rather than components that fit into a bore in the head casting (aka RA806E)?
Is this from a Cosworth TJ V10 with Beam Head?
It has a 'CA' part number so I assume its from a CA V8
"A pretentious quote taken out of context to make me look deep" - Some old racing driver

Brian.G
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Location: Ireland

Re: F1 Pneumatic Valve Spring, a closer look

Post by Brian.G » Fri Jan 06, 2017 7:49 pm

Brett54 wrote:Why a separate unit that bolts ONTO the head, rather than components that fit into a bore in the head casting (aka RA806E)?
Far lighter end result I would imagine. Also easier for micro drilling various passages too, not to mention that 'billet' alloy can be trusted fully in terms of air tightness in comparison to some cast areas. Also replaceable with ease.

Brian,
If you think you cant, you wont, If you think you can, you will

Dec
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Re: F1 Pneumatic Valve Spring, a closer look

Post by Dec » Wed Jan 11, 2017 1:34 pm

Excellent post again Brian! Thank you once again for the effort :)

Regards,

Dec

Brian.G
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Re: F1 Pneumatic Valve Spring, a closer look

Post by Brian.G » Sun Jan 15, 2017 12:36 am

Dec wrote:Excellent post again Brian! Thank you once again for the effort :)

Regards,

Dec
Thanks Dec!

Brian,
If you think you cant, you wont, If you think you can, you will

Mert
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Joined: Thu Apr 13, 2017 7:21 am

Re: F1 Pneumatic Valve Spring, a closer look

Post by Mert » Thu Apr 13, 2017 8:03 am

does this system have some sort of tappet that the cam lobe rides on? Could you post a pic please. Also you're a hero for spending your money on these items to just tear apart and share with us plebs.

Brian.G
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Location: Ireland

Re: F1 Pneumatic Valve Spring, a closer look

Post by Brian.G » Thu Apr 20, 2017 2:14 am

Mert wrote:
Thu Apr 13, 2017 8:03 am
does this system have some sort of tappet that the cam lobe rides on? Could you post a pic please. Also you're a hero for spending your money on these items to just tear apart and share with us plebs.
Hello there - it uses a dlc coated finger follower between valve stem tip and cam lobe - I'll post a pic of one tomorrow - have one here.

Brian,
If you think you cant, you wont, If you think you can, you will

Brian.G
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Re: F1 Pneumatic Valve Spring, a closer look

Post by Brian.G » Fri May 19, 2017 2:21 pm

Here is the dlc coated finger follower as mentioned - the cam lobe runs on the back of the finger follower - the left hand side of part,

Image

So I got a bit of time to start a test rig for the Pneumatic Valve Spring assembly. I want to do a little bit of testing on it in terms of pressures and so on so a little fixture was required.

Luckily its an easy rig to make with Part 1 shown below, offcut of 6082-T6 and away we go -

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Adding seat angles,

Image

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Fitting the valve guide,

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Drilling the holes to bolt on the Pneumatic Valve Spring assembly, plus the air feed hole. The air hole just .75mm in diameter,

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Adding the counter-bored face and hole for banjo air fitting,

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Slots in sides to lighten and allow visibility,

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And that's Part 1 of the test rig done.

Image

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Image

Brian,
If you think you cant, you wont, If you think you can, you will

MrPotatoHead
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Re: F1 Pneumatic Valve Spring, a closer look

Post by MrPotatoHead » Fri May 19, 2017 7:56 pm

Looks good!

djos
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Re: F1 Pneumatic Valve Spring, a closer look

Post by djos » Fri May 19, 2017 11:30 pm

Great work Brian, I wish I had room for a CNC or Milling Machine! 8)
The impossible often has a kind of integrity which the merely improbable lacks.

MrPotatoHead
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Re: F1 Pneumatic Valve Spring, a closer look

Post by MrPotatoHead » Sat May 20, 2017 3:44 am

What CNC do you have anyway?



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