I want to upgrade my 1996 eclipse for now I only have in the car header,catback,air cold intake and a Trottle Body at 55MM the engine is stock and I try to not due nothing to the engine(you know head and block)so is some one have something please tell me the I can upgrade eclipse with stock engine(420A)

 

Your not going to get any noticable power gains from any mods you do to that engine.... unless its a turbo charger.

Why not get a GST or a GSX?

 

i got a question...you want to get better performance and power...but you wont do anything to the head or block.. a good was to get power is to bore it...but as Sebba said, just buy a GSX because in the long run they are better

 

And turboing the 420a is a pain in the ***

 

yep...lol get a gsx.

 

well you are off to a good start but sadly you are at the end of your performance gains lol. here are a couple things you can do. Cams, port match the intake manifold, lightweight flywheel, tune w/ SAFCII or something. other than that, ur done. with these 4 mods at about 1050-1200 you could gain up to.... 20whp? mabey? i'm not sure how much you can tune the 420a's but i hear it's not much.

 

What about fuel injectors and coil pack and nology spark plug wires ?

 

and fuel rail

 

plug wires and ignition may get you 1-2whp if it's fine tuned but nothing more. injectors won't help you b/c you won't need that much fuel b/c it's still gonna be a weak n/a.