quad cam m70

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Re: quad cam m70

Postby Gus247 » 07 Sep 2017, 09:16

coming on well.. printer paid for itself already by the looks!! :)
aka Andy

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Re: quad cam m70

Postby g73a » 09 Sep 2017, 19:50

Sure has.

So tonight I actually did something instead of just thinking about doing something.

B30 head + hacksaw =

http://i.imgur.com/6WCKRli.jpg

No cam chain tunnel

Into the cnc and open up 2 of the headbolt holes to suit the dowels in the block

http://i.imgur.com/gUW56h5.jpg

Easy as that

http://i.imgur.com/xxEFlEl.jpg

http://i.imgur.com/n3dcB20.jpg

http://i.imgur.com/RXZRMyF.jpg

Exhaust just about clears the starter. Will require heat shields etc..

http://i.imgur.com/B29FsfD.jpg

Currently printing the upper portion of the outer chain case to make sure the bolt holes line up with the head.

There's a load more I've thought about and started to work out in terms of fitting the cams and stuff, I'll write that up tomorrow or something when I can be arsed.




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Re: quad cam m70

Postby g73a » 11 Sep 2017, 20:54

So tonight I acquired a double vanos unit. It's missing some bits but that shouldn't be too much of an issue.

http://i.imgur.com/raihx0S.jpg


Pretty much stripped ready to be washed tomorrow. Then I can start measuring and drawing everything. Just need to get the exhaust side pump bearing and bush out.

http://i.imgur.com/eOVVuOC.jpg

A thought came into my head whilst I was driving home, about the solenoids. As anyone with an e36 m3 probably knows, the solenoids are proper expensive even second hand.

There are several flavours of vanos that have appeared over the years. I can't be arsed to explain all the differences, but the list below explains it simply;

http://i.imgur.com/qkg6vOk.png

So anyway, I'm going to see what the solenoids off the other "x5" vanos systems look like and if there's a cost saving I'll re design the vanos housing to take them.




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Re: quad cam m70

Postby g73a » 12 Sep 2017, 20:54

This is what makes up the inlet piston assembly;

http://i.imgur.com/GjLIcCj.jpg


A cross section of the above parts modelled up;

http://i.imgur.com/D0lf3Bq.jpg


The oil flow through the vanos unit;

http://i.imgur.com/ko0ePOT.jpg

A bit of an explanation for anyone who's interested;

The vanos system takes oil at engine pressure and increases the pressure significantly through the use of a radial piston pump driven by the exhaust cam.

The high pressure oil is constantly applied to the annulus (rod) side of both the inlet and exhaust cam pistons.

High pressure oil is also fed to a solenoid that when open, allows the oil to flow to the full bore side of the respective piston. Because of science bitch, there's more force on the full bore side than the annulus so the piston moves forward. To move the piston back, the feed solenoid closes and the dump solenoid opens which dumps the full bore side pressure, so the constant pressure on the annulus forces the piston back.

There's also a (presumably) hydropneumatic accumulator to smooth out the pressure pulses from the pump and a spring loaded pressure regulator which dumps over pressure back to the engine by the inlet cam.

I'll continue modelling up the bits over the next few days.




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Re: quad cam m70

Postby g73a » 17 Sep 2017, 18:56

Been thinking a lot about the intake system today, I've decided to redesign it a bit, to make some more space between the v for the coolant return pipe and to make them easier to manufacture.

http://i.imgur.com/NvKT6sn.jpg

Currently printing a few to test

http://i.imgur.com/EFTRZRB.jpg

Should be done about 7am tomorrow.

The intake runners are probably a bit short, but because there are modular, as long as I make the plenum big enough, I can simply add bellmouth standoffs to adjust the length.







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Re: quad cam m70

Postby g73a » 23 Sep 2017, 19:11

So the next part to modifying the cam carrier is jigging it prior to welding using the existing dowel points.

http://i.imgur.com/sBuhzwZ.jpg

A bit of measuring

http://i.imgur.com/EMwf3br.png

I’ll machine that out of some tool plate, just need to get some hollow dowels to replace the ones which hold the cam caps down.

The other side can just have a large flat plate and I’ll clamp the whole lot together before preheating and welding.

New inlet things fit well.

http://i.imgur.com/cfDA67T.png

Currently printing coolant outlet thingy.

http://i.imgur.com/Rs0FDf8.png

Not sure if it’ll fit in the space I’ve got but it’s a first attempt.


Started cmm’ing the vanos housing too.

http://i.imgur.com/zkkxr7m.png




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