6-8psi on stock, healthy internals.

Eagle/Wiseco or Eagle/JE is a really popular combo that is pretty strong.

Good luck with this. Make sure you search until your eyes bleed, then search more.

 

Even at 6-8 psi don't expect that stock motor to last more than a few thousand miles. That's why you can find so many of those 420a turbo kits with "less than 2000 miles" on them. I hope this isn't your only car and good luck.

 

You are in way over you head, you would spend atleast 5k trying to make that block handle what a stock 4g63 can, just save you pennies and but a clean 1990-1995 AWD eagle talon or gsx (or laser)

You would get the same if not better performance of a built turbo 420a with a 4g63 with a 16g turbo and a walborrow 255, all that including the car will run you under 5gz plus its AWD.

 

You can do 6-8lbs safely on the stock internals with out a rebuild. I have a buddy with 120xxx on his 420aT and its holding up nice. How many miles are on yours? And just make sure you have all the essential tuning stuff so you know what your running, just dont beat on her all the time and you should be good.

 

I'm far from experienced but I just got my 97 GS in early July. Researched the hell out of the 420a and I've come to the conclusion that a turbo just isn't worth it. Just go the all motor route and enjoy your bitching daily driver. That's what I'm planning on

 

If you think a turbo isn't worth it, you are going to be very disappointed if you try to build an n/a 420a.

 

I would say you can boost until you get knock provided you have looked over everything to ensure its strength and reliability. Don't expect to get much out of it.

 

^^^ thats what Im planning on doing, then once it blows or winter comes I will do a rebuild

 

Be sure to check out 2gnt.com on there power stage write-up to prepare you for the rebuild. They have some awesome stuff on that site regarding both the head and the block. Don’t forget to drop your compression ratio according to your boost goals and you might think about stepping up to a stage 2 setup. I love the 420A as a built block, granted it doesn’t have the closed deck of the 4g63 but the bore of the pistons are larger thus a little easier to squeeze power out of. You might want to be careful running boost on the stock head gasket. Chrysler screwed the long-block by not drilling holes for the head bolts deep enough over piston 4 so enough compression will blow your gasket and if anti-freeze gets in your crank case it will spin all your bearings and could detonate a piston and then you would be looking at a new block and head which are in short supply. Any questions hit me up, I’ve blown enough 420A’s to know what not to do.

 

A well done budget 4-5psi turbo build will net you just as much or more than all the N/A parts from ebay one can get.

Fun, sure.
Fast, well...faster.
Worth it, depends on person.

 

Just save up for a 1G Talon TSI not a Eclipse

 

Why does it matter if its a Talon or a Eclipse? Also not everyone likes the 1G. Sure they have the 6 bolt 4g and thats probably the best stock built long-block of the 1g and 2g but some people like the looks of the 2g a lot better. Not everyones goals are the same, not everyone wants a 1/4 mile car. I race autocross and the 2g front-wheel drive works better with my driving style. Without knowing what your goals are its hard to say what you should do to your car and don't just say your goal is to make it fast.