Monday 19 November 2012

Fuel Tank setup and Manifold Adaptors

Not only is the body coming together, but the fuel supply and engine are coming along too.
Here is a shot of the stainless tank. You will see the battery box at the rear so the battery is recessed into the tank. Not only that but the Bosche EFI pumps are recessed too. Basically, the outer dimensions of the tank will include all fuel elements and the battery (so the EFI pumps, lift pump, surge tank, etc all recessed into or actually inside the tank.
This way, I just bolt up the tank and there is nothing else to make room for in the trunk. I can just install the tank and connect the fuel and electrical lines - and i'm good to go.

Something that may be of interest is that i'm going to use a PWM output from the EFI management system to provide an input signal to a solid state Hella relay. This will allow me to send a signal to EFI pumps to moderate their speed/output. This is a good thing because it stops the pumps running flat out even at idle (and churning up the fuel). The PWN output is variable based on a map of engine load and RPM. More on this when i finally wire it up.

Now here are some shots of the custom manifold adaptors i built up to convert the circular throttle blocks to the oval ports on the A460 heads. This first shot is from above and shows the 65mm thickness that provides me the port transition required and the 14mm diameter injector bosses.
The photo below shows the head face and the bolt holes along with the coolant ports.
These units have come up beautifully. For anyone local in Australia, i got these machined up at Flexicut in Dandenong by Robbie (owner). It took me quite a while to find a place that had the auto background knowledge and the interest in such a one-off project. I can't recommend them any higher.
The following photo shows the circular inlet compared the oval outlet above.
The coolant outlets are AN-16 thread machined for O-rings.
And the 3 photos below show some test fitting of the injectors and throttles.
Notice the throttle shaft comes close to the injector, but there is room for a throttle position sensor (just) on top of one throttle block. I'll just have to include some little extensions on these injectors o raise the fuel rail to clear everything. The number 1 priority was to get the injector position and angle right - and fit everything around that afterwards. I'll trim the top of the shafts later and create some cover plates to make it all look good.
Of course now i need to sort out my trumpets without having one cylinder steal air from another.....
But it's going to look good and flow plenty of air once done i believe.
And there is the small matter of all the linkages, bell-crank, etc. Yet another mini project that will take time.  

Paint - Test panel fit

Quick update for any viewers....
Decided to do my first panel test-fit after running the brake & fuel lines in the trans tunnel and along the diff' (see below).
 




I also wired up the tail lights (LED's) and wrapped up the rear loom for wiring up the lights, but i also included some CAT-6 LAN cable for any future IP devices (like a camera) and some extra wiring to control fuel pumps, relays, remote trunk lock, etc.
So - I first fitted the diff, front suspension (yet again) and wheels....
 
Oh - and the seats as well so i could position the new hand-brake correctly. That being a console mounted unit that will be simpler and work heaps better than the dash mounted standard version.
As you can see below - it looks ok....

Thankfully, the bonnet fits really well as the rear edge has a custom curve in it now. It's hard to see here, but the mod's i did on the upper cowl changed the curve (higher in the middle) and it took a lot of work to re-curve the rear edge of the bonnet to match.

But all the panel gaps are pretty good now - so i have to be happy with that.

 Engine update shortly.