Why does my car run better with can tune compared to CMR?

[Mike_Levy]

6.1 hits peak power generally between 6100 and 6400rpms, depending on mods. Make sure you let it rev that high. It could be a total slug on the bottom end and then make massive power above 6000.

[whatever_weirdo]

sure cause 5.7 are higher revers then the stroked 6.1s remember take a stroker they dont rev as high like a 383 chevy versus a 327
long stroke versuses shorter stroke why would we both have the same option 6,000 0r 6400 try it youll like it tell me whatcha think you can always go back peace

[Quick]

The R/T's really don't benefit from raised shift points. The SRT8's do.

[whatever_weirdo]

6.1 hits peak power generally between 6100 and 6400rpms, depending on mods. Make sure you let it rev that high. It could be a total slug on the bottom end and then make massive power above 6000.

how does a 6.1 make power after 6,000 look this is stock other then a afe2 intake and corsa exhaust and headers look at were it drops in torq and horsepower he doesnt have full headers and thats a cmr tune at 93 oct
my 2 cents i know this car cause its my 2007 srt8 300

[Mike_Levy]

They do. Stock peak hp is at 6100rpms. And breathing mods generally push that up a few hundred. I don't have the dytno sheets from my old CSRT8 available, but it was making peak hp at 6100 and peak torque at 5200.

[whatever_weirdo]

i beleve ya im just saying heres my results so i thing im pushing no power after 5,000 rpms
just my 2 cents
but im not calling you a lier but this is what i know and have for peak rwhp
thanks mike
you never sterred me wrong in the past but i just want him to be safe
again i always read your comments and you know your stuff but isnt safer better then boom lol peace

[BlueBee6.1]

The raised shift points for the SRT 8 are at 6400. I did mine this weekend and logged it to check. I am not sure if the raised shiftpoints will provide faster acceleration or not. I will have to run a 0-60 and quarter mile with standard and raised to check. I think the 6.1's power curve drops off dramatically after 6000 rpm, but I do not know at what rpm and how fast it drops off. Anyway the test will tell I guess. One thing is for sure, a lower shift point will provide better engine longetvity, cause if we have the ability to rev it we use it.
I have a K&N CAI installed and have a lot of knock, both ST and LT, max values are 6.5deg ST knowck and 5deg LT knock which is not good at all, so I need to add fuel and maybe try another brand of fuel. I will also log the air fuel ratio.
I would suggest that you log your knock with both tunes and also the air fuel ratio to see where you are, the values might very well give you a clearer picture as to why the Custom tune is not working. You can also log your engine torque in Nm through the rev range and this will really give you an idea when comparing your tunes.
If it was not done on a dyno to suit your particular engine, that is probably the problem right there. DS run a lot of verification tests on cars and set the parameters at a point that will cover variations in most engines. So the amount of development time that DS has put into your CAI tune is potentially a lot more than the custom tune you purchased.
A custom tune should really only be purchased if suited to your on a dyno.
Anyway log your data, I'm sure it will give you a better picture of whats happening.
Goodluck

[Illss1]

The raised shift points for the SRT 8 are at 6400. I did mine this weekend and logged it to check. I am not sure if the raised shiftpoints will provide faster acceleration or not. I will have to run a 0-60 and quarter mile with standard and raised to check. I think the 6.1's power curve drops off dramatically after 6000 rpm, but I do not know at what rpm and how fast it drops off. Anyway the test will tell I guess. One thing is for sure, a lower shift point will provide better engine longetvity, cause if we have the ability to rev it we use it.
I have a K&N CAI installed and have a lot of knock, both ST and LT, max values are 6.5deg ST knowck and 5deg LT knock which is not good at all, so I need to add fuel and maybe try another brand of fuel. I will also log the air fuel ratio.
I would suggest that you log your knock with both tunes and also the air fuel ratio to see where you are, the values might very well give you a clearer picture as to why the Custom tune is not working. You can also log your engine torque in Nm through the rev range and this will really give you an idea when comparing your tunes.
If it was not done on a dyno to suit your particular engine, that is probably the problem right there. DS run a lot of verification tests on cars and set the parameters at a point that will cover variations in most engines. So the amount of development time that DS has put into your CAI tune is potentially a lot more than the custom tune you purchased.
A custom tune should really only be purchased if suited to your on a dyno.
Anyway log your data, I'm sure it will give you a better picture of whats happening.
Goodluck

Funny u say DYNO becuase the tuner wants my car on the dyno now .

[whatever_weirdo]

I've had my car redone twice by the CMR tuner and i can't seem to break 12's with either tune with best at 13.0 but before with r16a (no adjustments made to spark/fuel) went 12.83 and with v9.08 it went 12.9 (no adjustments again to spark/fuel ) right off the expressway onto the track . Has anyone else had an issue like this ?

heres a all stock with a k&n 63-1114 and a cmr tune still 5,000 is the best we got look at how they dive after 5,000 rpm i did this today 77 degress in chicago illinois all i can say is both the 5,7 and 6.1 make nomore hores after 5,000 peace

[houseofpower]

The raised shift points for the SRT 8 are at 6400. I did mine this weekend and logged it to check. I am not sure if the raised shiftpoints will provide faster acceleration or not. I will have to run a 0-60 and quarter mile with standard and raised to check. I think the 6.1's power curve drops off dramatically after 6000 rpm, but I do not know at what rpm and how fast it drops off. Anyway the test will tell I guess. One thing is for sure, a lower shift point will provide better engine longetvity, cause if we have the ability to rev it we use it.
I have a K&N CAI installed and have a lot of knock, both ST and LT, max values are 6.5deg ST knowck and 5deg LT knock which is not good at all, so I need to add fuel and maybe try another brand of fuel. I will also log the air fuel ratio.
I would suggest that you log your knock with both tunes and also the air fuel ratio to see where you are, the values might very well give you a clearer picture as to why the Custom tune is not working. You can also log your engine torque in Nm through the rev range and this will really give you an idea when comparing your tunes.
If it was not done on a dyno to suit your particular engine, that is probably the problem right there. DS run a lot of verification tests on cars and set the parameters at a point that will cover variations in most engines. So the amount of development time that DS has put into your CAI tune is potentially a lot more than the custom tune you purchased.
A custom tune should really only be purchased if suited to your on a dyno.
Anyway log your data, I'm sure it will give you a better picture of whats happening.
Goodluck

Funny u say DYNO becuase the tuner wants my car on the dyno now .

To get the most out of a custom tune requires a dyno. Try to get yourself on a loaded dyno to simulate real world conditions. Data log, data log data log. Two items you may want to invest in to get the most out of your ride would be:

1) A catch can
2) Methanol Injection.

[Mike_Levy]

Don't bother with methanol injection. Its more for use with forced induction motors that knock constantly then for N/A ones.

Not that it matters but even if I was blown, I'd never inject anything but nitrous and fuel into my motor.

[Illss1]

A catch can is next and is half the reason it has crazy KR .

[hemi_nator]

I've had my car redone twice by the CMR tuner and i can't seem to break 12's with either tune with best at 13.0 but before with r16a (no adjustments made to spark/fuel) went 12.83 and with v9.08 it went 12.9 (no adjustments again to spark/fuel ) right off the expressway onto the track . Has anyone else had an issue like this ?

did you ever get your tune sorted out and please tell how

[Illss1]

I've had my car redone twice by the CMR tuner and i can't seem to break 12's with either tune with best at 13.0 but before with r16a (no adjustments made to spark/fuel) went 12.83 and with v9.08 it went 12.9 (no adjustments again to spark/fuel ) right off the expressway onto the track . Has anyone else had an issue like this ?

did you ever get your tune sorted out and please tell how

I'm running just the predator cai/93 oct with added fuel til i can get it back to the tuner . I'll keep the forum posted thanks

[hemi_nator]

I've had my car redone twice by the CMR tuner and i can't seem to break 12's with either tune with best at 13.0 but before with r16a (no adjustments made to spark/fuel) went 12.83 and with v9.08 it went 12.9 (no adjustments again to spark/fuel ) right off the expressway onto the track . Has anyone else had an issue like this ?

did you ever get your tune sorted out and please tell how

I'm running just the predator cai/93 oct with added fuel til i can get it back to the tuner . I'll keep the forum posted thanks

you and weirdo are next door cant he fix it i heard he started working on lx
this year try his dyno