quad cam m70

Show off your projects here, remember, a picture paints a thousand words so don't be shy with uploading those pics.

Re: quad cam m70

Postby Gus247 » 07 Sep 2017, 09:16

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

Image

BMW Forum UK
User avatar
Gus247
BMW Enthusiast
 
Posts: 10948
Joined: 17 Oct 2011, 13:24
Location: Reading, Berks.
Has thanked: 3436 times
Been thanked: 2918 times
Car model: '98 E36 323iSE Touring

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.




Sent from my iPhone using Tapatalk
g73a
BMW Enthusiast
 
Posts: 71
Joined: 10 Jul 2016, 19:19
Has thanked: 2 times
Been thanked: 74 times
Car model: f01 730d
Location: UK

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.




Sent from my iPhone using Tapatalk
g73a
BMW Enthusiast
 
Posts: 71
Joined: 10 Jul 2016, 19:19
Has thanked: 2 times
Been thanked: 74 times
Car model: f01 730d
Location: UK

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.




Sent from my iPhone using Tapatalk
g73a
BMW Enthusiast
 
Posts: 71
Joined: 10 Jul 2016, 19:19
Has thanked: 2 times
Been thanked: 74 times
Car model: f01 730d
Location: UK

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.







Sent from my iPhone using Tapatalk
g73a
BMW Enthusiast
 
Posts: 71
Joined: 10 Jul 2016, 19:19
Has thanked: 2 times
Been thanked: 74 times
Car model: f01 730d
Location: UK

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




Sent from my iPhone using Tapatalk
g73a
BMW Enthusiast
 
Posts: 71
Joined: 10 Jul 2016, 19:19
Has thanked: 2 times
Been thanked: 74 times
Car model: f01 730d
Location: UK

Re: quad cam m70

Postby g73a » 31 Oct 2017, 19:55

so yeah, this project has gone a bit sideways as of last weekend.

I came across an N73B60 (e65 760 engine) on ebay for silly money, so I put an offer in and won it.

I'm going to keep going with the M70 because of the amount of time (and money) I've invested into the block, but in the short term because of the amount of other work ive got on at the moment, ive looked at doing something with the N73.

so basically, loads of stuff swaps between the M70 and N73, which I wasn't expecting at all.

Image

so that is an M70 manual gearbox adaptor plate, very slightly modified to clear the coolant feed blocks, bolted straight onto an N73 block. all bolt holes line up and even the dowels are the same diam and in the same place.

in the picture is also an M70 auto ring gear, bolted straight onto the N73. I'm going to make sure the starter meshes properly tomorrow.

Image

that's a gs6-45dz (e46 330d) box, bolted up to the N73, with an M70 adaptor plate.


Image

this is how the clutch / flywheel / gearbox will interact. the only bit I have to make is the flywheel, which I should have done this weekend.



if I can get hold of a stock alternator I want to use one, because it will bolt straight on and will fit between the chassis rails.

ive also bought another shit 328ci, with the rear subframe hanging out. going to do all the welding repairs over Christmas when work is quiet.

the only things I really need to make are the inlet manifolds, exhaust manifolds and engine mounts.

more soon.


oh and how about 3 cams per head :d

Image
g73a
BMW Enthusiast
 
Posts: 71
Joined: 10 Jul 2016, 19:19
Has thanked: 2 times
Been thanked: 74 times
Car model: f01 730d
Location: UK

Re: quad cam m70

Postby Discostew38 » 31 Oct 2017, 20:12

That n73 looks quite compact
Do you know if it will fit in a 3 series yet
Life's to short to be driving boring cars
It's all about the old school
User avatar
Discostew38
BMW Enthusiast
 
Posts: 2756
Joined: 10 Sep 2013, 11:40
Location: Bedfordshire
Has thanked: 569 times
Been thanked: 1657 times
Car model: E34-M5
E36-328 touring
E46-330d touring
Volvo-940

Re: quad cam m70

Postby g73a » 01 Nov 2017, 08:00

Width and length fits, height may be an issue, not sure how much of a bulge there is in an e46m3 bonnet compared to a standard one.

All I’ve done so far is compare crank centre lines to top of rocker cover between the m54 in the car now and this engine.


Sent from my iPhone using Tapatalk
g73a
BMW Enthusiast
 
Posts: 71
Joined: 10 Jul 2016, 19:19
Has thanked: 2 times
Been thanked: 74 times
Car model: f01 730d
Location: UK

Re: quad cam m70

Postby g73a » 04 Nov 2017, 18:14

Image

Starter motor adaptor. Just need to get a new gear for the wosp starter to suit the m70 teeth.

Started drawing some itbs to suit the n73 heads, got a few ideas and will print some bits soon to check fitment.

Also had an e46 rear subframe blasted ready for powder coating and rebuild will all new bushes. The donor car I’ve bought has got a cracked subframe mount so I need to get that sorted over Christmas.


Sent from my iPhone using Tapatalk
g73a
BMW Enthusiast
 
Posts: 71
Joined: 10 Jul 2016, 19:19
Has thanked: 2 times
Been thanked: 74 times
Car model: f01 730d
Location: UK

PreviousNext

Return to Projects

Who is online

Users browsing this forum: Bing [Bot] and 38 guests