I would think adapting too large a TB with different idle air porting and wiring splicing may cause some idle issues. I just opted for the bolt on, plug and play improvement.
I dont think I could say enough times though how rough the castings on the ports for these engines are. Compare to the smoothness the 4g63 intake and you'll see what I mean.
I bet you can get more out of the stock TB with just port matching your intake.
Thats why these motors respond so well to "tuning"...Theres quite a bit of room for improvement.
I think hyundai just threw in whatever they could get from mitsu on the cheap and whatever they had sittin in the factory at the time. I saw all sorts of unusual combos thrown into hyundai shells. You could pretty well expect to find any number of motors in the Elantras and Sonatas.
'95 is when they switched away from mitsu stuff. If memory serves me.
These cars are all past the junkyard sweet spot in vintage to be profitable to most yards. How many 93 Elantras or Excels do you see on the road today? 10 years is usually the age most yards will limit. Now you can still find plenty camry parts. So there are exceptions.
Heres a bit of junk yard advice: The smaller yards tend to acquire older stock as they are usually out bid at auction on the good shit. They also get a lot of the They tend to keep it a bit longer too. Some acquire sock from picking up derelict cars from peoples driveways.