Yes, go Megasquirt. That SAFC2 will not help you very much on a Speed Density system; like the Chrysler system is. It is designed for a MAF system, so it works better and more effeictly on that.

MegaSquirt - Electronic Fuel Injection Computer by Bowling and Grippo ©2010

"The MegaSquirt® family of programmable electronic fuel injection controllers are standalone EFI controllers that offer very flexible tuning options using a laptop computer. These controller range from build-it-yourself controllers to completely assembled, ready to install controllers. Some MegaSquirt® vendors even offer ready to install wiring kits complete with finished wiring harnesses and tuning for certain vehicles."

So it varies as to what comes with it. You'll have to shop around. This should be all you need to control the car. It's a stand-alone style setup. The only other item you'll need is a wideband 02. However, if you are new to setting up and tuning; I's suggest that you find someone locally that can help you.

As for location of the ECU's.. on the 420A cars, it should be under the hood. You'll find a connector with about 60-pins; that should be an ECU connector.

Do you have the engine built to handle 20psi? You say you have quite a bit of money invested in this so I'm assuming you do; but if you do not have have forged internals, do not bother shooting for 20psi, the engine won't be able to handle that. On stock internals, 8-10psi is realistic.

As far as the Jeep TB's... the one the Neon people use are 60mm... but hoenstly I forget which model Jeep that came off of.

some of the jeeps are 55mm at the back because its tappered but you can hone it out. go to 2gnt.com and search for "jeep throttle body". i would like you there but i do all my online stuff on an old phone so i am limited. just take a deep breath homie, it will be ok. just do your research, plan ahead and take your time. megasquirt also has wideband o2 sensors and everything you would need. you could pick me one up too and i could help you thru it i will be going megasquirt as soon as i get some extra money or one falls in my lap. 2gnt.com tech pages should be your friend. try diyautotune.com for your megasquirt and read all the info you can on it. you download a free app or get both current available and tune with your laptop. you'll get thru this, man.

95talongirl said:

So it varies as to what comes with it. You'll have to shop around. This should be all you need to control the car. It's a stand-alone style setup. The only other item you'll need is a wideband 02. However, if you are new to setting up and tuning; I's suggest that you find someone locally that can help you.

Click to expand...

This ^
There are several options that I have personally seen. I havn't seen one with the wideband yet (not saying you cant find one) but if you get one without it is pretty much a requirement. Also I have yet to see a plug-n-play so some wiring might need to be done or you might need to talk to a member about making a wiring kit for you.

95talongirl said:

Do you have the engine built to handle 20psi? You say you have quite a bit of money invested in this so I'm assuming you do; but if you do not have have forged internals, do not bother shooting for 20psi, the engine won't be able to handle that. On stock internals, 8-10psi is realistic.

Click to expand...

Also this ^ Forged pistons and rods is a must. Also be sure to break in your motor before slammin 20 psi in there.
2GNT.com - A_Proper_Rebuild
At the end of this link is a good way to break in the motor.

Also the 60mm TB are off the late 90's straight 6 4.0L

EDIT: Also I would post in the 420a bolt tech area because a lot of us 420a guys forget to check this area. Not that Talon girl can't hold her own in a 420a thread