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Alfa V6 + R380 + LJ70 into SJ
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nj111
Just got MTs


Joined: 15 Dec 2010
Odometer: 161
Location: Forest of Dean



PostPosted: Tue Mar 21, 2017 9:23 am    Post subject: Reply with quote

Rear main hoop is the one with most bends and needed to follow the cab quite well. Thanks to BendTech software we got it right first time.




It was time for a trip into the yard, as we couldnít get a good look at the perspective of the thing from any distance inside the shop.








Adam machined the seven links from 50mm 7075T6 Ally and soon found this grade is strong when he tapped 14 1.25Ē UNF holes 80mm deep.
Note that one downside of this high strength grade is it wonít stay looking bright for long.





The wheelbase has been tweaked slightly so that a standard Patrol front Propshaft fits both front and rear (with short output adaptor to LT230 transfer box rear)
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nj111
Just got MTs


Joined: 15 Dec 2010
Odometer: 161
Location: Forest of Dean



PostPosted: Wed May 17, 2017 1:12 pm    Post subject: Reply with quote

There were so many things to decide from this point.
Cab to chassis mounts, seat mounts (to chassis), seat positions (driverís multi adjustable and quick release), pedal box (what to use, itís position, how to mount it). Bulkhead design, shape , material, large bore engine induction pipe route, Steering valve position, dry sump tank position, exhaust route, dash, side impact bars. So many decisions to take in one hit.

A buggy build would have made life so much easier to accommodate everything.

Seemed best to start with seating positions and here we have a wide range of potential drivers to accommodate, from about 5ft 2 to 6ft 2.
Weíve mounted the Mastercraft suspension seats quick release style, pulling one full length pin at the front allows each seat to be lifted out of itís rear location lugs.
Driverís seat has 3 positions. This played us up for a while, quick release is easy, but quick release at 3 positions and two very different heights is slightly tricky.
Hence the driverís side doesnít look quite so pretty but it seems to work.

Naturally the seats are fixed to the chassis not the cab floor, as will be the belts.



In fact the cab is now doing very little for us. It holds the dash board, steering wheel, windscreen, doors and pedal box and provides the necessary bulkheads, floor and roof.
Not sure how heavy it is but two of us can still lift it.

We wanted to be confident in the strength of the cab mounts to chassis so we renewed the entire length of itís inner sills in 2mm plate right up to the door hinge pillars. This structure should act as a decent load spreader. We also beefed up around the door hinge pillars and the same at the rear cab mounts which are directly on top of a chassis cross member.

There are some rocksliders suitably placed to hopefully protect those nice new sills.

Having completed the seating the next hurdle was pedal box design and location. Sorting this out was a reminder of how far back the engine is situated!
To keep the build cost under control and for easy supply of parts in future I got hold of a Disco 1 pedal box, but they are huge. Handy though that itís clutch master cylinder is the correct one for our LR R380 gearbox slave cyl.
Using itís master cylinders and pedals I created a more compact version.
Whilst doing this I milled a press tool die set to form a pair of 6mm deep ribs into sheet material under about 15 Tons pressure.
This will be used on bulkhead and floor extensively.
The pressings make a massive difference to panel stiffness and have that factory look.
Designed this for 2mm ally but it seems to work ok on 1mm steel as well.





From the seating the pedal box was temporarily tacked in position with various offcuts and bulkhead construction began from pedal box working outwards.

We had now removed the entire SJ bulkhead right back to the flanged edges so had lots to go at here.



In the style of 1970ís Alfaís the pedals have ended up slightly offset to the right, but this is because of the LR bellhousing fouling the ideal position for clutch pedal. Weíll have to live with the slightly poor ergonomics.

Bulkhead is 1mm Mild steel, originally planned in ally but with this being permanently fixed there were some factors I didnít like.

Long term ally/steel corrosion issue being one and the fact that ally melts at just 625 degrees so wouldnít last many minutes with an engine fire.
The entire floor pan will be all in 2mm thick NS4 ally and quickly removable.

Lots of fabricated parts make up the bulkhead, a joint effort between myself and Adam.
It bears no resemblance to the SJ one we removed and it took a good few hours to create.



Weíve ended up with a pedal box nearly half way up the driverís side of the engine, although access to starter motor and header removal is still ok.

On top of the pedal box looks like a decent place to mount that very weighty steering valve, rather than have four hydraulic hoses entering cab space.

On the passenger side we have great space for a decent height dry sump tank, and itís right next to the 5 stage pump pick up and return so thatís working out better than expected.
Weíll also have loads of space on front of the motor, with great access to keep an eye on all those belts and pulleys.
Remember although the water pump is at the front, the stat housing and hoses come off the back of the Alfa motor. Having no water pipes at the front is looking neat for those rear radiator hose runs.

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nj111
Just got MTs


Joined: 15 Dec 2010
Odometer: 161
Location: Forest of Dean



PostPosted: Wed May 17, 2017 1:16 pm    Post subject: Reply with quote

Itís nice to look at a few curves so the gearbox bellhousing cover is conical and in ally. Not having an appropriate set of rolls to form a cone in NS4 grade I had to coin it over in the press.
This can be easily removed to provide clearance for gearbox removal.




Weíve designed the floor pan and central chassis cross members so that the transfer box and gearbox can be removed either from above or below.
We feel that during an event from above will be far more agreeable as the seats and floor should come out in just a few minutes.

Dash is original SJ Ė we like it, it comes out quickly, hides induction pipe elbow, so thought why not retain some more SJ in this build.

Side impact bars, a requirement for both MSA and Ultra 4 have to be from the same size tube as the main structural members. That being 2Ē diameter in our case.
They need to attach to front and rear main hoops or thereabouts.
But the SJ cab is so narrow and a pair of competition seats are pretty much as wide as the internal cab space so thereís virtually zero remaining internal space and for the concept of this build we must retain SJ doors!

Solution was perhaps obvious but involved a lot of hours to make it happen neatly. Thatís possibly why Iíve not seen it before.

Here shown not completely finished. The concave fabrications (tidy work Adam) will be rivetted into the doors.




In the event of a door being damaged we can drill the rivets out and move these fabrications to another door pretty quickly, just two cuts being needed with a skinny disc down the inside of a fresh door and drill a few rivet holes, job done.

The (undersize) plastic waste pipe indicates approximate side impact bar position, - you get the idea.




Next to sort is battery box under passenger seat, so we can complete the floor panel structure.
Played around with many battery positions, to keep C of G low this seems the best.



Coming up soonÖ.
Fetch the cab off, paint it, put it back on and fit / build the rest of the cage. At this point we will be getting close to having a truck.
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Gavlad
Gate Opener


Joined: 14 May 2009
Odometer: 12
Location: Wirral


1994 Toyota Landcruiser

PostPosted: Thu May 18, 2017 11:16 am    Post subject: Reply with quote

Applause Applause Applause I do look forward to your updates!!!
__________________________________
Bonne vivanche
Gavlad
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nj111
Just got MTs


Joined: 15 Dec 2010
Odometer: 161
Location: Forest of Dean



PostPosted: Thu May 18, 2017 12:36 pm    Post subject: Reply with quote

Pleased that at least one person still interested!
So hereís a bit more, clearly these two pics were not taken on my phone as they are in focus and our work actually looks almost pro for once.

Hereís the battery box steel frame which will be lined with NS4 ally after painting.

We tried various battery orientations but found to be able to remove the transfer box the battery box has to be removable.
So itís bolted to the chassis and also to one of the two removable fabricated Weldox cross members which are beneath transmission.
The splines protrude about 120mm from the back of an R380 gearbox so lots of rear clearance is necessary to get that transfer box off.





The handbrake disc brake which is Nissan micra Ė bored out and redrilled to Y61 prop flange PCD.
Loving the price of doing it this way at £10 or so for the disc.
Itís my own LT230 to Y61 prop flange adaptor, pretty much the same as I made for the front output except this one has an additional step to locate the brake disc through itís bore.
As stated earlier rear prop is identical to front (both being standard 3 litre patrol front ones).

Now that we have a battery box the ally floor can be made and the cab will be somewhere near done.

Notice also some fabrication work on the rear of the cab at the bottom under the door aperture.
We used our home made press tool in the middle section.

In the two corners the rear body mounts are just about visible, M12 bolts pass through two vertical tubes into the largest chassis crossmember on the vehicle. Itís the one the top links of the rear 4 link also mount onto.

Here are those rear corner mounts before they became an integral part of the body.




The stock rear door less glass and other heavy bits will be re fitted and secured shut.

Batteries are a bit different as they are Northstar Ė apparently in all the tests they outperform those red ones and quite a few people have had that other make go bad on them so we shall see what happens.
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Xpajun
Mud Obsessed


Joined: 22 Sep 2008
Odometer: 3129



1988 Mitsubishi Shogun

PostPosted: Thu May 18, 2017 4:07 pm    Post subject: Reply with quote

nj111 wrote:
Pleased that at least one person still interested!


Make that at least two Wink
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jeremy
Just got MTs


Joined: 09 Jan 2006
Odometer: 456
Location: Lydd Kentshire



PostPosted: Fri May 19, 2017 6:54 am    Post subject: Reply with quote

Three Very Happy Very Happy
__________________________________
Nissan patrol, Jimny.
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randcook
Gate Opener


Joined: 06 Feb 2013
Odometer: 10
Location: Near Monmouth



PostPosted: Fri May 19, 2017 8:43 am    Post subject: Reply with quote

You have had a couple of views Wink
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