Version 3/4 EJ20 Block into 2003 STi
08 June 2011, 09:45 PM
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Version 3/4 EJ20 Block into 2003 STi
Just a quick one, will a version 3/4 EJ20 block fit into a 2003 'Blobeye' STi with standard heads?
Also does the 2003 STi have a the nitrated crankshaft?
Cheers, Mark
Also does the 2003 STi have a the nitrated crankshaft?
Cheers, Mark
12 June 2011, 01:12 PM
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Anyone for this one? Its just I've got a forged EJ20 block and I'm after a newage Impreza... So would be hoping this block would just be a direct replacement for the block on an 03 STi without any modifications... Obviously will be using standard 03 STi heads
12 June 2011, 02:29 PM
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No to the nitrided crank as standard on the '03 STi Mark.
You can use your forged Version 3~4 bottom end with the '03 STi AVEX heads - depending on the compression height and piston bowl volume of your forged pistons, would imagine you would have to use a 1.1mm thick head gasket to keep the Static CR somewhere near to where it should be.
Mick
You can use your forged Version 3~4 bottom end with the '03 STi AVEX heads - depending on the compression height and piston bowl volume of your forged pistons, would imagine you would have to use a 1.1mm thick head gasket to keep the Static CR somewhere near to where it should be.
Mick
12 June 2011, 02:48 PM
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Thanks for the reply Mick.
Engine was rebuild using wiseco pistons (92mm) and has 8.29:1 CR... Fitment wise, it'll be a direct replacement though?
And all running gear, 6 speed etc will be okay?
Cost wise for mechanic to do this job, rough idea of cost or hours?
Engine was rebuild using wiseco pistons (92mm) and has 8.29:1 CR... Fitment wise, it'll be a direct replacement though?
And all running gear, 6 speed etc will be okay?
Cost wise for mechanic to do this job, rough idea of cost or hours?
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13 June 2011, 09:49 PM
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The early block will fit ok, it will only have 4 bolts holding the box on, the main problem is the bottom bolt for the starter motor, your car has a bolt going through and into the block, the early block won't have that. They way I get around this is too tap a 12mm thread into the gearbox and use a countersunk allen bolt. Ue the std 0.6mm headgaskets, the differnece in compression is the extra cc'c in the new age heads (+2cc each).
13 June 2011, 10:12 PM
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Nice one mate, thank you very much... So when I've got the block fitted, I was going to retain my current headers and uppipe (which are ported and are currently attached to my early forged block). In doing this will I be able to retain the newage turbo?
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