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Re: Needed a front turrett for my 26....so I made one.

PostPosted: Tue Aug 06, 2019 4:36 pm
by gus
Make a jig consisting of 2 sheets with holes drilled for all four suspension pins.
Cut the crossmember off of the chassis leaving the chassis as intact as possible.
Cut the old towers off and cut the old crossmember closing plates off and replace
bolt the towers and crossmember to the fixture*
weld
remove from fixture then set the chassis on a perfectly flat surface[!] measure and weld the assembly to the chassis

* my chassis the lower pins were so out of position from the factory we had to cut the drivers side lower pin out and reweld it to get it to fit in the fixture

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Thu Aug 08, 2019 11:32 pm
by TomMull
Nice work on the turrets. I wonder if you might have pictures of the chassis after the old turret had been cut out and/or of the new ones tacked or being welded into place.
Tom

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Sun Sep 22, 2019 2:44 am
by deadline
Some pics
img_8992.jpg and
New turrets

img_8994.jpg and
New turrets

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Sun Sep 22, 2019 2:52 am
by deadline
Vacuum box repair
img_9213.jpg and
remove old

img_9211.jpg and
fit repair

img_9216.jpg and

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Sun Sep 22, 2019 3:06 am
by deadline
Weld weld weld
img_9223.jpg and

img_9227.jpg and

newturrets.png and
New Turrets

Now on to the rest of this frames issues.

We can make new turrets and get then back on in place as per the specs. If anyone has a need please reach out.

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Sun Sep 22, 2019 12:05 pm
by billwill
Might have been an idea, for while the vacuum tank is open and definitely free of fuel fumes, to fit a 'drain' plug through which in future you could vent compressed air to clear out any fuel fumes through the little entry tube.

You still can do it of course, provided that you do it before running an engine and vacuum system.

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Sun Sep 22, 2019 12:41 pm
by deadline
Bill, what is the recommended type of 'drain plug' for that? Like a radiator drain plug or something like a schrader valve?

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Sun Sep 22, 2019 11:19 pm
by billwill
deadline wrote:Bill, what is the recommended type of 'drain plug' for that? Like a radiator drain plug or something like a schrader valve?


Dunno, it's just a suggestion, I don't know of anyone who has actually done it, but then until your messages I had never heard of anyone rebuilding the front suspension turrets. :shock:

If I was doing it I would use the same kind of drain as used in a fuel tank, but probably mount it on the side (front?) then you could stuff a thin air pipe in (to wave it about inside) and have it exhaust through both the usual inlet and also around the edges of the air pipe.

It was brought to my mind by this topic and realising that I had not informed the welding bloke that there was a small chance of fuel fumes in the vacuum chamber when I asked him to weld some strengthening plates on the bottom of my turrets.

Fortunately if you always have a non-return air valve near the carburettor intake there is actually very little chance of any fuel fumes getting into the vacuum chamber or staying there (and mine didn't explode). 8)

viewtopic.php?f=42&t=16727&hilit=turrets

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Mon Sep 23, 2019 7:51 am
by nmauduit
billwill wrote:Fortunately if you always have a non-return air valve near the carburettor intake there is actually very little chance of any fuel fumes getting into the vacuum chamber or staying there (and mine didn't explode). 8)


When I welded a front tow hook to the crossmember of my S4 I tried to empty the crossmember first by filling it with compressed air and let it vent out : quite a bit of oily gunk came out (mostly in my face). A small hole evenually let most of it out, but I figured that over the years, fumes eventually made it through the valve, which originally was connected on #4 with the head breather... I now have connected the vacuum valve to #1 cylinder.

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Mon Sep 23, 2019 12:12 pm
by deadline
We will definitely be adding tow hooks as they are required for vintage racing.

Not sure about the vacuum tank drain. I can find no pictures of a drain on any of the spider frames. Also not sure that we need a vacuum tank as we would run either fixed lights or no lights at all in racing.

Re: Needed a front turrett for my 26....so I made one.

PostPosted: Mon Sep 23, 2019 4:56 pm
by types26/36
deadline wrote:We will definitely be adding tow hooks as they are required for vintage racing.
Not sure about the vacuum tank drain. I can find no pictures of a drain on any of the spider frames.

I had an S3 which had a Spyder frame (reconditioned Lotus type) not the space frame.
It had a round vacuum tank with drain plug, towing hook and removable wishbone fulcrum pins.