2.X L conversion of 2.0 L engine
Posted: Tue Oct 11, 2016 4:43 pm
Dear All
I have now started my motor upgrade project – let me name it 2.X L conversion (I will explain in the following).
In Mike Morrison´s book the 2.3 L conversion is mentioned (page 101). Among the modifications are new wet liners to take the standard 2.4 L pistons – and it is here the confusion starts.
The 2.0 Pistons have a compression height of 32 mm and the 2.4 L have only 30 mm. Meaning using the 2.4 L pistons in a 2.0 L engine will end 2mm below the upper egede of the liner (at TDC).
This agign will result in really bad compression, unless I machine 2 mm of the block (or use custom pistons or conrods). I am affreight that machining 2 mm will result in other problems, like weakning of the block and problems with components relative to the heads, thermostat housing, intake manifold etc. And I am not funned about the idea to use custom pistons or conrods either.
So I was thinking why not use the 2.4 L crankshaft, with 60 mm stroke compared to the 57 mm of the 2.0L engine, the 2.4 L will compensate for 3mm/2=1,5 mm in top position. With this setup I will max need to remove 0.5mm of the block. I will also be able to take usage of the additional 3 mm stroke, resulting in a 2.4 L conversion.
The advantages are obvious – not only will I get 2.4 L but I will also spare my engine for a lot of custome parts/modifications.
Now the qustion, Has someone in the group experice with the 2.3 L conversion and have you faced the same dificultys ? Have some one tried to fit a 2.4 L crankshaft in a 2.0 L engine ? Does someone have a spare or defective 2.4 L crankshaft I could buy/borrow.
Regards Jesper
I have now started my motor upgrade project – let me name it 2.X L conversion (I will explain in the following).
In Mike Morrison´s book the 2.3 L conversion is mentioned (page 101). Among the modifications are new wet liners to take the standard 2.4 L pistons – and it is here the confusion starts.
The 2.0 Pistons have a compression height of 32 mm and the 2.4 L have only 30 mm. Meaning using the 2.4 L pistons in a 2.0 L engine will end 2mm below the upper egede of the liner (at TDC).
This agign will result in really bad compression, unless I machine 2 mm of the block (or use custom pistons or conrods). I am affreight that machining 2 mm will result in other problems, like weakning of the block and problems with components relative to the heads, thermostat housing, intake manifold etc. And I am not funned about the idea to use custom pistons or conrods either.
So I was thinking why not use the 2.4 L crankshaft, with 60 mm stroke compared to the 57 mm of the 2.0L engine, the 2.4 L will compensate for 3mm/2=1,5 mm in top position. With this setup I will max need to remove 0.5mm of the block. I will also be able to take usage of the additional 3 mm stroke, resulting in a 2.4 L conversion.
The advantages are obvious – not only will I get 2.4 L but I will also spare my engine for a lot of custome parts/modifications.
Now the qustion, Has someone in the group experice with the 2.3 L conversion and have you faced the same dificultys ? Have some one tried to fit a 2.4 L crankshaft in a 2.0 L engine ? Does someone have a spare or defective 2.4 L crankshaft I could buy/borrow.
Regards Jesper