So my 1996 Chrysler Concorde with a 3.5 l V6 has a speed limiter that stops it at 109 mph. But I want to keep up with my buddy that has a mustang and I know my car can keep up with him. It's just that the speed limit won't let me I know the top limit is around 130 or so, but I'd like to have that 130 is there anyone that tunes 96 Concord ECUs or anyone that can crack one if that's the word for it?

 

Are your tires capable of handling the heat? You would require an 'H' or 'V' rating. A blow-out at 100mph is deadly.

I certainly hope you are not racing on public roads. If you are on public roads you and your buddy are a menace to others. Public roads are not designed for the speeds you are doing and you are risking your life and the lives of others. I don't care if you kill yourselves but do not put others in danger with your reckless driving.

It is obvious you have not had any professional driving training or you would not be endangering others being stupid on public roads.

\rant off

 

As noted in your engine swap thread there is realty little to nothing that can be done to the 3.5 to improve performance. The aftermarket just did not invest or support any enthusiasm for these cars or engines. The entire LH platform, Concord, Intrepid, LHS, 300M all and including the Prowler are stuck with 250-255 HP.
Many of us at the 300mclub.org have researched and attempted over the years with little to no success.
If you really do find something please be sure to share.

 

All right since I've come to find out that there's literally no help with this stupid little 200 horsepower. V6 I guess I'm just going to have to go with my expensive plan and have to do a complete rebuild on the under end of the car I'm talking taking everything out, putting a junkyard LS in with a manual 5 speed and then taking a diff from some car and welding my own suspension on the rear for it cuz I just love this car too much to give it away

 

GOOOOOOOD LUCK with an LS Swap and RWD Conversion. Many have contemplated it but very few got to even move under their own power and have yet to see one that got completed.
There was a guy on the https://www.dodgeintrepid.net/ that did a V8 swap years ago. https://www.dodgeintrepid.net/threads/v8-rwd.57129/
I forgot about a guy that turbo charged a Concord (rear mount) https://300mclub.org/forums/viewtopic.php?t=34470 however after the engine puked he stopped posting in January 22
Don't get me wrong, I would love to V8 RWD my 2002 300M w/235,235 miles on it or at least juice up the 3.5 it's just not something that does not appear to be a feasible project. Maybe something Jay Leno could afford but even Boyd Coddington just did some cosmetics on the M he did.
4.0 Stroker https://300mclub.org/forums/viewtopic.php?t=25031