Hellcat 2500 RPM limit

[cudakid340]

Hello everyone,
I have a problem I can't figure out. Its a hellcat swap into 70 roadrunner, the hellcat engine has a 2.85 pulley and fic1000 inj and ported throttle body behind a manual 6sp. The car starts and runs great but I have a rpm limit of 2500 in neutral, Throttle Torque Source says RPM Limit. I attached the tune file and log. I have tried many things but nothing works. I have been playing for hours on this thing, Any help would be much appreciated.

Thank you.HELLRUNNER tune 15 with rpm limit.hpthellcat swap rpm limit log 2.hpl

[Iceyrider]

If this is mated to a manual transmission I would try disabling the torque management methods under Torque Management , General , ESP TqMgt and Stall TqMgt. That may not fix the underlying issue which is probably a torque limit, but it might make it drivable. I would also disable launch control under Fuel Cutoff DFCO. The initial reduction multiplier has a spike right at 2500 rpm's. It may be stuck in launch control.

[cudakid340]

Thank you for that. I tried all of it, I disabled each one and no change.

[unicornpower]

Scan it for codes.....all factory sensors hooked up and reading?

I have a lot of time under my belt now with my hellcat swapped 64 drag car. Send me the tune if you want and I can look it over.

[cudakid340]

Scan it for codes.....all factory sensors hooked up and reading?

I have a lot of time under my belt now with my hellcat swapped 64 drag car. Send me the tune if you want and I can look it over.

yes all sensors connected and only one code which is U1110 and its because I don't the speedometer calibrated. But that code wont limit the engine as i have a hellcat swap in my Cuda and i have the same code ad no problems like this one. I compared my Cuda to this one and made similar changes to no affect on the problem. i attached a tune and log on my first question. Does the link work? Thank you

[unicornpower]

I see the files. I will take a look later during lunch and see if anything jumps out

[cudakid340]

I have been messing with it for the last few days and the problem is still there. I changed the various sensor reading and i can get the limit to go away but then it wont idle, it surges really bad and no matter what i do to the etc it wont change. so i am still trying to figure it out. I will install new map sensors today.

[mprmn3]

What did you end up finding to raise your RPM limit? I'm running into the same issue on my swap. Used an 06 Charger R/T 5.7 into a 73 Charger. Was a NAG1 and I put in a Tremec, but can't find a way to rev above 2500.

[Wjjeepman34]

I don't have an answer, but a suggestion, for at least the OP. If the speedo isn't calibrated, it may be stuck in "launch mode" because it still thinks its at 0mph. Again, not sure, but I would try to get the PCM to read actual mileage, and see if that helps at all.

[mprmn3]

Does it have to have a VSS hooked up? I am running a TKO2 with manual speedo pickup gear.