Before I start, I don't know all the ins and outs, but it took a lot of searching and hassling people (Thanks) to get the info required to fit mine, so thought I would put it into a post and maybe help someone else thinking of the swap
I found a set of second hand carbs on eBay, and they came with a Boggs brothers stainless manifold already attached, so it was a bonus.
If you aren't so lucky, the manifold came from a place called Boggs Brothers, and they make it to order. Very helpful people also, they answered many questions that I had!
The carbs I used are off a Yamaha R1, and seem to be a well recommended carb.
Some pics of the setup I bought...
I was lucky that mine came with an air filter also! The filter is a Pipercross PX600, and if you search that on eBay you can buy it, and a special backplate for bike carbs also />
The next step is to get the fueling sorted. Again, I hit it lucky as my setup came with the Yamaha R1 bike fuel pump, and I wired this up to the yellow wire on the ignition switch, which is an ignition live. I also put an inline fuse on it just to be safe. If you want to be really smart... You can also put an immobiliser somewhere secret on the fuel pump wire if you desire.
I mounted the fuel pump at the petrol tank, as I am informed that the pumps are better at 'pushing' fuel instead of 'pulling it' to the engine bay.
A lot of people use the pinto fuel pump, and an inline regulator set at 2.5 PSI! I simply kept my pump in place, but removed the wee pushrod from behind it, that way it's not pumping flat out all the time. I also blocked off the pipes to ensure no dirt got in if I ever want to use it again />
I bought a universal exhaust bracket from a motor factors, and it fitted the pump diameter perfect! I then used 2 nuts and put the bracket on the long thread on the end of the fuel tank strap bolt, and tightened it up so it couldn't move. I took the old flexi pipe off the fuel sender, and put a new pipe into the pump, and a new pipe then from the pump to the rigid pipe which takes the fuel to the engine bay.
The R1 pump has no labels for inlet and outlet, so for reference sake, the one sticking straight up is the inlet, and the curved one is the outlet!
I then put an inline filter in the engine bay, and the fuel pipe goes onto the brass fitting on the underside of the carbs.
On the manifold I got, there is a takeoff for the brake servo, so this had to be connected up also.
The actual manifold connects to the head with a standard inlet manifold gasket!
Now, that's fuel, and brake vacuum sorted... The next thing is the throttle cable. I got a cable with mine, but it wasn't right as it had a balljoint end on it for an escort. I improvised and cut the balljoint off and filed it down so it fits the Capri pedal! I have heard of people using bike brake cables, with a few solderless nipples to hold it in place />
On the R1 carbs there is a choke slider also, I havnt got round to fitting my cable yet, but it starts ok without it as it's not that cold this weather! A universal choke cable off eBay is what I've ordered and I'll fit it this week />
Engine breather system... On the weber standard manifold the PCV valve breathes through the manifold again, and recirculates the old crankcase gases. On the new manifold there will be none of this, so an oil catch tank is required.
I begrudged paying for one, and fancied a go at making one so I did just that...
The PCV valve pushes into the top of the flame trap, and the flame trap into the side of the block below the carbs. I simply chemical metaled an airline fitting into the top of the flame trap, and ran a hose to my bottle. I also drilled a spare filler cap, And threaded and glued another fitting into it, and ran it to the bottle also. For the top, I bought a filter off eBay for £4 />
Alternatively, you can cheat and buy these...
My car started no problem once I had let the float bowls fill up, however it was running far too rich and popping and banging every time you revved. I took it to a local man and he took the top covers off the carbs, and there is a needle in there. We moved the wee retaining clip to the second groove from the top, it was on the middle one from standard. This helped no end, and it's running leaner and driving a lot nicer.
They sound pretty cool, and they have good power too />
The timing needed advanced a bit to make them sweet also!
I intend to go megajolt in the future, and these carbs are handy as they have a TPS built in already!
A list of all I needed;
Manifold (carb dependent-made specially by Boggs brothers)
Carbs - I used Yamaha R1 carbs
Throttle cable - bike brake cable if you don't get one with it
Choke cable - universal twist lock jobby off eBay (£6)
Fuel pump - I used the bike pump, as it's the correct PSI and it has an auto cutoff when the float bowls are full also.
Manifold gasket
Fuel filter
Fuel pipe
Jubilee clips
Oil catch tank (or make your own)
PCV adaptor (or make your own)
Breather hose
Wire for the fuel pump
Fuel pump bracket to secure at the tank end.
Water hose from the manifold to the heater pipe on the bulkhead.
A few photos of the overall job...
In this you can see the filter backplate...
And filter...
You can see where the throttle cable goes, and also my oil cap breather! I colour coded the top caps for the carbs for the look of things />
I bought second hand, and I am glad I did! I picked my whole setup (including all extras like fuel pipe etc) up for less than £250. Buying new would be double that by the time you buy manifold, carbs, filter etc.
I hope I havnt forgotten anything, but if I have I'll add it in!
Again, I dont claim to be an expert, just trying to assist others if at all possible.
Thanks for reading!
Kris
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