Hi everyone. I'm new to the Forum, and have a few questions.

One of the guys at work has a new vehicle that he was "opening up" on the Interstate highway a few weeks back. He said that when he got it to 90mph, it started "holding back", like the computer was starving it of fuel - not shutting it down, but not allowing any more speed. Sounds to me like a computer controlled speed limiter.

My wife has a three month old Charger R/T - 5.7L Hemi. We've had it on a few trips, but haven't really had a chance to "open it up" yet. It's her first new car and she's very protective of it. She's a bit concerned with me potentially "hurting it" (LOL). She won't let me put the FlowMaster or Borla exhaust system on it - she doesn't want it too loud. We've averaged 25mpg on the trip(s) with ESP turned off.......pretty good (I think) for a 345 Hemi V-8.

My questions:

Should I expect a similar "top speed limiter" to rear it's ugly head on the Charger? IF SO, how can that be disabled?

Also, I've seen a few threads on "performance chips" and programming them. What's the best chip/program for the 5.7L Hemi in the Charger R/T that won't sacrifice too much fuel mileage?

Thanks in advance!

 

I have a Jet Chip 2 in my Daytona. It seems like a lot of folks here have the Superchip 3825. Good Luck! There is tons of stuff to do to these sweet a$$ sweet cars!!!

 

Welcome 08ChallengerDad you have a nice car in the family!

Yes you R/T has a limiter, I believe the stardard R/T is 135mph. Once you take the R/T on open road and open it up you'll love it and unless you or your wife is a real speed freak you will not hit the limiter.

There's several products to choose from. SuperChips flashpaq allows you to tune various things. HyperTech also has a "tuner" but it's very limited compared to SuperChips. These two products flash the car's computer program.

Jet produces two difffernt Chips (stage I and II) that plugges between the PCM and wiring (CANBus).

Both programmers and chip provide updated air/fuel ratio "maps", ignition advance and various other tuning points that will provide performance gains.

The hottest one going right now is the SuperChips flashpaq.

 

Thanks, guys. I appreciate the info.

Hopefully, a lot of what I learn here can be applied to the '08 Challenger as well. That was the deal......
my wife needed a new car, so I agreed to the Charger R/T she chose (I made it sound like it was a tough decision...LOL) ON THE CONDITION that when the '08 Challenger comes out, I can trade my '01 Cruiser in on one (of course I'll HAVE to have a bigger Hemi than her 5.7L).

She's not a speed freak, but I am. Luckily, I don't race "for real" (real cars) any more. I "sim race" on the PC. It's MUCH cheaper, hurts less when I wreck/get wrecked, and doesn't affect my insurance rates.

Thanks again for the info.

 

Too cool 08ChallengerDad, I had the same thing going with my GF but now she’s talken the Caliber SRT4 when they come out. I may have to wait on the Challenger. Either way I’ll have fun moding it, whatever it happens to be

 

Welcome to the forum, ChallengerDad.

I have the Daytona model, with a Jet 2 chip, K&N 63 series cold air intake, and Magnaflow rear tips. I get 25 MPG at 75 MPH on the interstate, and run a 14.04 in the quarter.

Look around several posts in here. Lots of info. Chargin69 wrote about the Jet 2 chip and the Superchips programmer. My Jet 2 was half the price, but the SC is internet upgradeable for new progams. I haven't seen slips from just changing the programming and running them to see which is best. Of course, opinions are opinions -- I want proof.

I have to admit I'm abit like your wife. I love my new Daytona and am not hard on it. I have had it to 125 but that is all I can tell you -- the car feels fine around that speed. Personally I don't know if the chip unlocks the speed limiter or not...

Be careful of exhaust mods. This is a real touchy subject and subject to your personal desires. I say be careful because the engine is actually two engines -- a V8 that runs like a V4 in MDS mode. That is where many guys expierence DRONE through out the cabin area. I'll leave it at that. Read about it in the forum. I had a bad expierence with the Magnaflow system. Also, the system is different from your R/T to my Daytona, and some posters feel the drone isn't significant in their R/T models. Good luck with the whole subject on that!

Enjoy the car and have fun here on the forum.



MN

 

Thanks, guys. Lots of good info.I appreciate the input.
Good atmosphere here too.....everyone is helpful.