Seeking advice on 2056 project, from 1.8 with L-Jet Options

[RohJay]

I'm looking to upgrade my "EC" code 1.8 to 2056, whilst retaining the stock L-jet FI.

I have done some research here and am contemplating the following components.

1. Cylinders : to re-bore a set of 93mm cylinders to 96mm
2. Pistons : 96mm KB Piston set
3. Crankshaft : 71mm from the 2.0
4. Connecting Rod : Matched set of 5.160" from the 2.0
5. Camshaft : leaning towards Webcam 73 ...

Appreciate if I can have some feedback on the above configuration and also the specific questions below

1. Cylinders - Will be re-bored locally. Any pitfalls when doing this ?

2. Pistons - Looking at KB 96mm 2.0 piston set from EMW. Please confirm if the 24mm pin is correct for the stock 2.0 Con Rod.

3. Crankshaft and Connecting Rods - I am assuming a USED 2.0 Crankshaft and Con Rods with correct bearings will suffice. Anything to look into when sourcing these parts used?

4.Camshaft - I am aware of the gold standard Raby 9590 kit from Type4store, but what else is available at lower cost? Such as Webcam 73 or other option from Elgin that will work with 2056 and L-jet?

Thanks in advance...

[RohJay]

Thanks so much Mark; I'm a lot more confident now.

As I begin to source the components, I have a question about the Sealing / Spacer Ring between Cylinder and Head. Item No. 3 in the following illustration:



Standard sizes are 93x104 for 1.8 and 94x105 for 2.0.

When 96mm Piston/Cylinders are used, Is the size of these rings dictated by the Piston/Cylinder diameter (in this case 96mm) or the type of Head being used ( 1.8 in this case) ?

Also I gather the thickness on the spacer ring plays a part in Compression Ratio?
Any rough idea what thickness is required for 8.1:1?

[Dave_Darling]

As I begin to source the components, I have a question about the Sealing / Spacer Ring between Cylinder and Head. ....
When 96mm Piston/Cylinders are used, Is the size of these rings dictated by the Piston/Cylinder diameter (in this case 96mm) or the type of Head being used ( 1.8 in this case) ?

The area in the head where the cylinder sits (the "register") should be the same for 1.8 and 2.0 heads, 105mm. So you could use either a 2.0 or a 1.8 head gasket.

Or none at all; there is a strong contingent who contend that head gaskets should not be used, and that the cylinders should be lapped to the head registers instead.

Also I gather the thickness on the spacer ring plays a part in Compression Ratio?
Any rough idea what thickness is required for 8.1:1?

The spacer definitely plays a part in the compression ratio. But the heads, the top of the pistons, the deck height of the pistons (distance of the top below the top of the cylinder), and so on also have a pretty big effect. You will have to measure to figure out what you have, and do the math.

--DD