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Not sure how this will help you , do you know that the 6.2HC and 6.2 Demon and 6.4 cams have different Durations @ 50
SRT8 392 camshaft Part # 05037379BC. NON MDS
215/221 @ .050".574"/.551" valve lift 1.6 intake/1.65 E ratio,121 LSA,108 ICL
SRT8 392 MDS 05038419AB
@50 Exhaust 215 on 4 lobes for MDS
Hellcat cam is
I - .561" lift duration @50 215
E - .551" lift duration @.50 230
Demon is
I 561 Duration @.50 215
E 551 Duration @.50 235
I know the differences between cams, just don't know why desired/actual exhaust angle at idle still read like a 5.7 cam despite importing values from a 6.2 (HC) stock tune? At idle 6.2/6.4 is at full cam advance ~134 degree exhaust but on a 5.7 it is ~125 degrees exhaust. One would think swapping the tables would now cause the PCM to register full advance as ~134 degrees exhaust but it does not.
You get same numbers because it doesn't know you have changed the cam grind.
So you have to work backwards from full advance.
On the 6.2 it is 134 but on your 5.7 it thinks full advance still is 125.
So 134 is now 125..a 9 deg offset.
If you want to use 6.2 cam tables, take 9 degs out of entire exh tables and cam will now be in same actual position in the 5.7 engine as 6.2.
Quote:
Originally Posted by Homer
Yeah I thought changing the lock pin and phaser values of the 5.7 with that of the 6.2 would have updated the lock pin value but I guess it does not. Guess I am going to go back to stock values and make note of the offset and tune from there. Thanks for input!Quote:
Originally Posted by Hemituna
5.7 PCM will show full advanced at 125. Like Hemituna stated, treat 125 as 134 and work down from that.
Thanks! Do you know if there is an offset table that can be adjusted to fix the numbers in the other tables?Quote:
Originally Posted by hemituna
That is what I thought the lock-pin max was for but looking at a 6.4 tune both the 5.7 and 6.4 have identical lock-pin (120) and phaser (85) max settings yet the 6.4 sees 134 at start-up/idle. Would be nice to have it mapped out to change it but have no clue if it is possible.
One thing I was wondering is if the scat pack stage 2 cam shaft offered by mopar had the same lsa as the standard 5.7 cam? If not I wonder how the stage 2 PCM hands the change?
Hey Homer,
Here is read from 2016 Charger R/T that had Scat Pack Stage 3 kit installed. You'll see cam tables are the same as stock.Attachment 93827
There is not, you are going to have to use your brain :)
Quote:
Originally Posted by spoolboy
Use the 6.2 WOT numbers with the 9 deg offset.
Transpose those same numbers into PT tables...The cam will now only move a few degrees
Blown engines work way better like this.
The crazy PT numbers are for emissions...it will respond/perform better and get better economy moving the cam less... believe it or not.
Quote:
Originally Posted by Homer
Yup, I saw your posts recommending this to other members. I know it is not a "performance" cam but I swear the car feels like it has some balls...not bad for a budget cam. I did notice that compared to the 5.7/6.4...the 6.2 barely moves the cam and when it does move it, it seems to retard it a little at lower RPMs and advance it a little at higher RPMs. Really want to get this thing dyno tuned but not sure who in the chicagoland area is proficient at tuning non-HC, FI Hemis?Quote:
Originally Posted by Hemituna
Oh yeah, setting PT like you said makes the engine run better...simply runs smoother and snappier. Thanks again Hemituna!Quote:
Originally Posted by Hemituna
This post is very helpful... sorry to be late to the show.Quote:
Originally Posted by Hemituna
Exactly which tables would I be subtracting the 9 degrees from?
Which tables are you referring to as PT tables?
Attachment 95287
The -9 degree applies to all exhaust VVT tables.Quote:
Originally Posted by rich s
Awesome. Thank you!Quote:
Originally Posted by Homer
Homer did you apply the -9 degrees to the "Calibrated" table also?
Copy all the 6.2 tables over. Then highlight entire tables and -9 from them
hey guys i'm in the process of doing the same cam swap , from what everyone has suggested i have to modify the idle fueling as it will be richer down low and on cruising so my question is how can i modify the idle and cruise fueling if im using ANN do i have to rescale the Fuelmass vs pwm or is there a table i can modify just like the PE table . i searched and went over the file a thousand time already
so other than the vvt and idle/cruise fueling what needs to change ?
There is an awesome thread here on ANN tuning. It's linked in the pinned post