in short, yes. but theres more to it than that.
you will also need to lower the compression ratio of the engine to deal with boost. bigger injectors probably needed to, and probably a good idea to change the gearbox too, as your standard box's ratios wont be as effective as a turbo models box. probably more stuff too, but thats about all i can think of for now presuming you have the manifolds, intercooler etc all sorted.
Other options include running a much lower boost and using water injection to curb detonation issues
But HDI - in Simulators like Gran Turismo you just choose "add turbo" and it's all done for you. It doesn't make you rebuild the engine and get it remapped!
If only real life was as easy as it is in the virtual world.
I know, but if you look at the price of a Stage 4 Turbo in GT it is commensurate with the amount of work we all know is really involved. On GT1 (long time ago) I had an FTO with about 1200bhp. And it was totally and utterly undriveable. By me, anyway
I agree with HDI, you want a turbo car, go and buy one. After all it already has the correct brakes, suspension, clutch [don't forget to upgrade that too by the way], drivetrain, blah blah blah.
If you are still insistent and good luck if you are, most of the points have already been raised below but don't forget that you will also need to address the VERY important factors i have mentioned in the second sentence here or you are heading for doom and gloom and danger. Don't forget to inform your insurance company too or at least get a good quote before you consider such a project.
I don't want to be sounding like a killjoy but you really do need to plan things like this with a lot of precision and a good bank balance.
I converted an N/A GTO engine internals with slight modifications, used the stock N/A heads/cams etc. We fitted it with a single turbo, along with all the required fuelling and boost control systems needed and used it for a couple of years, it was an awesome bit of kit and sounded monsterous. Of course we upgraded the brakes/suspension etc. We even took it across Europe and to the Nurburgring but not on the track as it hadn't even been run in by the time we got there.
The bottom line is, if you're going to do it, do it properly, don't read a half baked theory and get big ideas, do lots of proper research and get all the info required before jumping in with both feet.
Or of course, just wait a while and buy a quicker car, it's cheaper in the end.
#i was only asking for research to see what people say and the advice thats they give and to get bette knowledge to see if its possible ie seeing the site that makes out its simple and then obviously getting further knowledge from other bringing me to the conclusion that the site thats says its a piece of piss is chaating out of its arse lol so not going to bother lol
cheers peeps much appriciated
another quick question is it possible to fit throttle bodies/ twin 40 weber carbs to and EJ20 lump relatively easily?
as i have 2 twin 40's laying around at home and wondered if it would be possible to mount them to the flat four engine (obviously need to get another to for the other side lol) but my main concern would be setting up the throttle linkage