Flat spot in low to mid-range 2011 Charger R/T

[tommynights]

Question #1 - is a neg. number richer fuel?

#2 Also, with standard Diablo tune and +20% throttle on my 2011 Charger R/T AWD, I have a big flat spot in the mid throttle, 30-60 mph accel (merge speeds) almost like passing gear won't register/kick down. If I give more throttle 3/4+, I rev rapidly and scream down the road. The 91 tune's flat spot was less pronounced, nut so was top end. How can I de-tune 93 or up tune 91 to 1) avoid flat spot or 2) mello WOT? I'm not drag racing, just want all around strong pull thru gears and keep some gas mileage.

I bumped up throttle b/c I wasn't getting the reaction I wanted out of traffic lights, not racing - just pulling away with gusto so to speak.

Thanks for any help. If I can't get this sorted out in the next week or so, I think I'll need to return under the 30 day mark. I do see a racer liking the performance, I just need to smooth it all out.

[jmberring]

I don't have an answer to your question about hitting that flat spot, but wanted to let you know that I have a 2011 V6 Charger and experience the same flat spot. I have also posted this problem up on the forums and nobody can answer why. I'll be watching this post also.

[tommynights]

Good to know, i really think its a trans issue - wish they would address, just need to drop the kickdown for passing gear or prevent early up shift. Added Pypes race pro cat back this weekend and helped quite a bit with low end torque, also cut back on throttle boost as I think there's a bit built into diablo tune. Also have a CAI, thinking headers next...after that I'm thinking cam, or divorce court...

[Blacktopjim]

There's a 15% throttle boost built in to the tune out of the box, so adding 20% on top of that seems like overkill. I played with my throttle boost much more modestly then you did. I increased only 2 points at first and noticed a difference in how much less input it takes to get the car pulling, been playing with calibrations all day trying to find the best set up. More to come

[Blacktopjim]

Ok so I did some more tweaking on my tune calibrations and found the $$ on my car!! I just went to fuel parameters and increased richness by 1% on the low rev range, 2% richer on mid rev range, and 3% on the high rev range .....then bumped throttle response to 2.5, ran the shift firmness tune followed with TCM update/calibration, all on the diablo tune....which I'll probably bump throttle to 3-4% and stop there because my previous post was a little exaggerated on the throttle boost response at 2%, but was noticeable nonetheless. I think the problem with 20% boost is all your power is bunched together, which is probably why it seems jeckle n hide. I just ran all over town with this set up, freeway pulls, some red light dead stop pulls.....and this set up had no weak spots at all, it pulls hard early and keeps pulling to red line very nicely. From a stop or speeds under 40, the throttle response comes in pretty early for nice 1/3 to 1/2 throttle pulls, cruising the freeway (45-50mph+) it takes about a 2/3 throttle input to get the same response as the lower speed accelerations. The only other mod I have is a BBK cold air intake, and the way it ran tonight makes this tuner worth twice its price to me. This set up should be a sticky for charger r/t's!

[hemifevertuning]

I should be able to nail the flat spot with my enhanced tuning option too. I've had a few folks complain about it. Shoot me a pm if interested.