Originally Posted by kircheth
how much power does the 2.4L give you and does it fit on the original motor mounts for a 1.9?
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The later Cam-in-head 2.4L motor has the same external block size and bolt position so will bolt up in place the same as a 1.9L motor.
There are a couple of ways of getting a 2.4L motor:
1) Buying a late 2.4 Opel Omega or Frontera motor - the problem here is that the 2.4 fuel injection system will not fit under a GT hood and the 1.9/2.0 L manifolds do not bolt up. So you have to get a late 3.0L six-cylinder Opel unit cut down and modified to fit - or find a set of rarer carb manifolds.
2) Building a 2.4 from a 1.9L (has to be bored out to the limit) or 2.0L block (right sized bore) Then getting a 1.9L crankshaft 'stroked' by welding it up and recutting the crank pins. A 2.4L crank does not fit directly into the 1.9/2.0L Block as clearance has to be ground around the oil gallery.
Both quite expensive ways to go.
The stock, late model 2.4L Opel motor is rated at about 125 horsepower.
This can be increased to more than 200 hp with the usual engine modifications.
A good 1.9L motor bored out to 2.0L will give you 120 to 140 bhp - just not as much torque as a 2.4L motor.