just had quote it will cost £2600 for 180bhp from courtenay turbo for my Astra gsi 1.8 16v. A lot of money i think i will go for a calibra turbo job and do it myself can someone help me on this matter what i need etc. Will i have to swap the hole wireing loom for the calibra one or just part, what other parts will i need to do the hole job and is it a hard job to do.
Richard Bell did mine on my MK2 Astra and if you take off the time we spent eating and driving around picking and dropping stuff off, it took him 12 hours. He owned an Astra MK3 Turbo a year ago so he knows quite alot about them.
He does have alot of useful equipment though like lifts and stuff.
He might be able to do it for you if you wanted, pm him.
There are other things to consider as well. There is the gearbox I just mentioned above, a normal F20 fitting to the 2 litre models will probably survive the torque of the turbo but once you start upping the power on it the gearbox is unlikely to last long. So an F28 is a good idea, probably not that hard to find since you'll probably get one stuck on the side of your engine.
A Limited Slip Differential helps reduce the wheelspin as well but they are expensive.
The engine comes with a loom that ends in the X5 plug I think, this needs to be connected to your cars loom (not sure if yours has an X5 plug). It depends on the year of the car and engine you get I should think as well.
I've replied to your pm.
I detailed the conversion in 4 threads, here have look