06 charger 5.7 r18 or r20?

HEMI21 · Post by **HEMI21** » Wed Feb 06, 2008 9:59 pm

im currently using r18 on my 06 charger 5.7 and im pretty happy,i did like r16a more but i cant go back to it,should i go to r20 or should i just keep what i have,i keep hearing bad things about r20 with the 07 5.7 charger but i havent heard anything about the 06's so i dont know what to do...should i just stick to r18 or update to r20? or does anybody know how i can get r16a back?...any help would be much apreciated thank you.

redhemi14 · Post by **redhemi14** » Thu Feb 07, 2008 7:40 am

I would like an answer to the same question also. Does it pay to upgrade my 06 RT or am I looking for trouble? Thanks!

UKCHRYSLER300 · Post by **UKCHRYSLER300** » Thu Feb 07, 2008 7:47 am

at which version did your pred update your calid,because you cant go further back than that version.My 05 doesnt like v20,so I went back to v18

johan · Post by **johan** » Thu Feb 07, 2008 9:13 am

The 06's did not get any calibration updates from r18 to r20, only changes where some wot fuel added to all tunes and increased wot shift firmness in the 05-08 5.7L's.
What did you like better with the r16a vs r18? Could you post your calid as well.

redhemi14 · Post by **redhemi14** » Thu Feb 07, 2008 11:25 am

I think I will stay with R18. I dont think I ever floor the throttle. What is the calid?

johan · Post by **johan** » Thu Feb 07, 2008 2:06 pm

You dont floor the throttle?? Thats what these rides where made for, he he.
Calid is a calibration id for your pcm program.
You can get it if you go to options>>troubleshooting>>show calid

slack-axe · Post by **slack-axe** » Fri Feb 08, 2008 11:46 pm

I just finished upgrading a 2007 300C 5.7 to R20 (from R18). I followed the website directions to the letter and the upgrade process was flawless.

Yes there is a noticeable difference with R20 -- but it is a very good difference

I was getting some audible pinging at WOT with the R18 93 Octane tune (using Mobil gas), and now the pinging is completely gone with R20 -- so I am now getting a strong and even pull through the entire RPM range.

In my opinion, the shifting in R20 is a thing of beauty. I can catch good rubber on a WOT 1-2 shift almost at will now -- not just a chirp, but a good squawk.....in both Drive and Autostick. It was also nice not to have to set the fan temps!!

Now the wife is demanding me to upgrade her 06 Charger 5.7 from R18 to R20......She allowed my car is never to be quicker than hers. Great job again guys!

johnc · Post by **johnc** » Sat Feb 09, 2008 11:34 am

Your wife drives an 06 Charger 5.7 - good girl

wheelman · Post by **wheelman** » Sat Feb 09, 2008 6:07 pm

Re the different version nos. I am a bit confused here...I have a predator not yet installed-06 charger SRT.
How can one file upgrade a 5.7 and an SRT from the same file for best performance. Both are different engines.
Also how can one version give better performance than a later version per some of the posts I am seeing?
What am I missing here?

redhemi14 · Post by **redhemi14** » Sat Feb 09, 2008 10:14 pm

Thanks for the feedback.... I'm gonna go for R20.. Will let you know if I see a difference.. Thanks!

redhemi14 · Post by **redhemi14** » Mon Feb 11, 2008 5:26 pm

Just installed R20... no problems with the install.. Slack-axe is right R20 is smoother shifting all the way to redline... My car has NEVER performed this well.. Thank you Diablo.... awesome product just got better...

Post by **mikel** » Mon Feb 11, 2008 5:42 pm

redhemi14 wrote:Just installed R20... no problems with the install.. Slack-axe is right R20 is smoother shifting all the way to redline... My car has NEVER performed this well.. Thank you Diablo.... awesome product just got better...

Good to hear!

zeakr1 · Post by **zeakr1** » Fri Feb 15, 2008 9:31 pm

how do you go back to old version

06 charger 5.7 r18 or r20?

06 charger 5.7 r18 or r20?

RE: 06 charger 5.7 r18 or r20?

RE: 06 charger 5.7 r18 or r20?

RE: 06 charger 5.7 r18 or r20?

RE: 06 charger 5.7 r18 or r20?

RE: 06 charger 5.7 r18 or r20?

2007 5.7 upgrade from R18 to R20

RE: 2007 5.7 upgrade from R18 to R20