Swapped a second gen Neon intake manifold and tb onto a first gen Neon (pics/dyno results)

Our employee Vincent owns a 1995 Plymouth Neon equipped with the sohc engine and the manual transmission.
Now, Chrysler has produced the 2.0 SOHC engine for 10 years, or from 1995-2005. For the most part, the engine is practically the same except for when Chrysler started using the next gen pcm in 2003. Other than that, you can essentially take a head off of a 2005 and put it on a 1995.

We started studying the intake manifolds and we noticed that the second gen manifold was much smoother, had no sharp 90 degree bend, and overall seemed better designed. With there being less restrictions, the second gen manifold should produce more power than the 95-99 Neon manifold.

Photo of a 1995-1999 Neon 2.0 Sohc intake manifold

1995-1999 Neon 2.0 SOHC manifold

1995-1999 Neon 2.0 SOHC manifold

Photo of a 2000-2005 Neon 2.0 Sohc intake manifold

2000-2005 Neon 2.0 Sohc intake manifold

2000-2005 Neon 2.0 Sohc intake manifold

So, we did some studying and found that it looked like the 00-05 Neon manifold would fit, however we would need to do the following:

- swap in a 00-05 Neon starter because the 00-05 manifold dips lower than the 95-99 and the 95 Neon starter sticks out further
- swap in a 00-05 Neon throttle cable and pedal assembly (easy to do, dont get scared, two bolts hold the pedal to the firewall!)
- You MUST get a early 00 Neon throttle body with the early style IAC idle air control motor so you can use your 95-99 Neon IAC
- You must trim some of the fan shroud in front of the manifold and trim some of the intake manifold
- You need to fabricate a new intake system before the throttle body

Now, here are some pics of the work:

second gen manifold swap into 95 neon

second gen manifold swap into 95 neon

Picture of the intake system before the throttle body:

Intake system before throttle body on 2gn swap into 95 Neon

Intake system before throttle body on 2gn swap into 95 Neon

Now, some of you are already thinking.. Why go through all this work?!

Here is the answer..

2gn intake manifold and tb swap into 95 dyno

2gn intake manifold and tb swap into 95 dyno

Now, here is what we changed:
95 sohc intake manifold
automatic throttle body with manual transmission throttle linkage
factory air intake system

00-05 sohc intake manifold
00 early style 2gn throttle body
custom fabricated throttle body to manifold piping
custom fabricated pre throttle body intake system

We gained a solid 5 wheel hp and almost 10 lbs of torque.

If you look on the dyno, you’ll see the red line is stock, and the blue line is the new intake manifold and tb setup. There is a clear, and huge gain all the way up to 6000 rpms then the old intake flowed better. We believe the reason for this is the old throttle body was larger, and could flow more air than the early 00 throttle body. So, we’ll have to find a way to make the throttle body larger to flow more air!