I have heard about something called an EPROM ecu and was wondering how good they are and what benefits it may bring. If it helps I have a non-turbo model with the 420a engine.

The EPROM ECU is only on the Turbo model eclipse with the 4g63 motor. The 420a has a different ecu. But the eprom ecu's you can chip with a chip from like ecmlink.com and are able to tune and log.

would you happen to know of a good chip for the 420a ecu?

There's no actual good 'chips' for our ecu. What are your goals? What are you trying to do with it?

The 420A ECU cant be "Chipped", on the inside it is encased in epoxy to protect it from the heat of the engine bay. You can either tune with an SAFC for minimal gains, an AFX ECU from Howell (it will take a long time though) or a Megasquirt ECU.

95 Eclipse GS: 10.5:1, Crower 2's and MSII
186 WHP - 150 WTQ
14.697 @ 93.85 MPH......Gone, but not forgotten
99 420A Avenger: Given to my sister
99 GS OZ: Sold
03 Evo 8: Family Car with balls

is there a piggyback that would allow better tuning or is this completely a lost cause unless of course I pull together the cash for a megasquirt

Megasquirt is awesome! You can have MS control Fuel Only while the stock ecu controls everything else still, to make it a little easier for newbie tuners lol then later you can hook up Spark control.
Theres multiple piggyback systems you can hook up if you know what your doing but there's TONS of info readily available for megasquirt to already help you.

Well, sounds like I have a solid plan now

it also sounds like you have a lot of researching to do. Can you please elaborate on why you think you need this? Ie turbo build etc.. I hope you dont htink by doing this, your going to make mad gains on a stock, or semi stock setup..

you can always trust a dishonest man to be dishonest, honestly, its the honest ones you need to look out for. you never know when they will do something..stupid

It was partially because I came across the part and wanted was hoping to find out a little more about it. There is honestly a high chance I won't be needing this, but I've just been checking out chips and such trying to find something that would help tune my car once I have the basic tunning steps finished.

The Neon guys are working on a socketed ECU. Not sure how close or how far away they are from accomplishing this goal.

What exactly is a socketed ecu?

Gotta love those neon guys. On it like ants... Still ugly cars though.

Double check all your coolant and oil lines....., before you take off and see a cloud of smoke behind you!

Although I’m a MS guy, I’ve been following the .org thread for a some time now. Recently, ShelGameRob has been able to read data from the SBEC and SBECII within his custom program. Only a matter of time before he’s able to write custom tunes.

http://forums.neons.org/viewtopic.php?f=18&t=386645&start=480

-Rafiel

Originally posted by 96TurboGS
Although I’m a MS guy, I’ve been following the .org thread for a some time now. Recently, ShelGameRob has been able to read data from the SBEC and SBECII within his custom program. Only a matter of time before he’s able to write custom tunes. http://forums.neons.org/viewtopic.php?f=18&t=386645&start=480

Captain Caveman

96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq
97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq
98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats
99 OZ 5sp Stocker 15.856 @ 85.97
99 GS stocker auto 17.7@77mph!

wiki home page:http://www.2gnt.com/index.php?d=bullettdsm