how big is a 20g turbo? is it made by greddy? is it a good turbo? about how big is it? how much hp does it produce?
I can give you some specs, but I don't know how well you'll understand
http://cherrypicker.tripod.com/id1.html <--- go there for starters.
The 20g turbo is also known as a TD06/TD05 (depending on whether it's a hybrid or not). It is in fact made by Greddy.
It should be good for high 300's to low 400's (that is if I remember correctly, if not 500 at the most).
Also, if i remember correctly, greddy turbo's are THREE bolt turbos. Meaning you need to make sure the flange on your manifold and downpipe are 3 bolt and not the usual 4 bolt that most other turbos use.
Not all 20G's are my by GReddy... but some are.