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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #11  
Old 04-28-2011, 05:08 PM
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Quote:
Originally Posted by barn View Post
Mine stopped gaining at 5300 rpm torque started to drop at 4300 rpm.
Exactly, looking at GTs chart and this one (can't remember where I downloadedd it...maybe from AEM) the HP hits a plateau at 5300 and the torque has already been dropping. Running your rpms much higher will only hurt your times. Only my opinion but shifting at 5500 would be ideal b/c it'll take the trans a split second to shift and the rpms will drop right back into the heart of the power band. Shift any lower than 5500 and by the time the trans shifts the rpms might drop too low in the power band. Shift any higher than 5500 and you are spending unnecessary time in the rpm range where power is dropping and it'll probably feel like the rpms are "hanging".

I'll post my dyno charts next thurs or friday and see what the curves look like. I'm having an Arrington cam installed and 2 tunes written. I finally gave in and bought the aFe stage II cai also.
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File Type: pdf AEM_dyno_graph.pdf (95.6 KB, 43 views)
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  #12  
Old 04-28-2011, 10:05 PM
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Well I tried 5800rpm and then 5500rpm shift points back to back and lost an average of one tenth at the 5500rpm setting. I think that the rpm is dropping too low between shifts (under 4000rpm) and I'm falling under my torque peak. I'm going to try raising it to 6000rpm and see what the outcome is. Some guys are reporting gains shifting as high as 6200rpm.
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  #13  
Old 04-28-2011, 10:59 PM
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dustin, thanks for the feedback. nothing better than realworld results with these motors. I wonder if you hp keeps climbing (vice leveling off) due to the better breathing. I should've thought about your mods when looking at GTs dyno graph. Sorry for the bad advice.
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Old 04-29-2011, 03:55 PM
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Quote:
Originally Posted by gabrieldy View Post
dustin, thanks for the feedback. nothing better than realworld results with these motors. I wonder if you hp keeps climbing (vice leveling off) due to the better breathing. I should've thought about your mods when looking at GTs dyno graph. Sorry for the bad advice.
Hey, no worries. I like experimenting with things like this! I'll let you guys know how the 6000rpm setting turns out.
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Old 04-29-2011, 04:42 PM
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Please do. Now I'm not sure where to set mine when it gets tuned. We'll have to see what the curves look like. Maybe peak hp plus 400-500 rpm?

How do you like your Nitto 420Ss? That's the tire I have picked out to replace my stockers.
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Old 04-30-2011, 02:01 PM
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Quote:
Originally Posted by gabrieldy View Post
Please do. Now I'm not sure where to set mine when it gets tuned. We'll have to see what the curves look like. Maybe peak hp plus 400-500 rpm?

How do you like your Nitto 420Ss? That's the tire I have picked out to replace my stockers.
The Nittos are awesome for wet and dry traction but suck in mud and snow. They barely spin off the line compared to the stock goodyears. I lose about a half second in the quarter due to the heavy 22's though.
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Old 04-30-2011, 03:41 PM
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Thanks. no mud or snow for me and I plan to go down a size to the 275/55-20
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Old 04-30-2011, 07:41 PM
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I tried 6000rpm WOT shift points today. Dropped 2 tenths from the 5500rpm setting and also picked up 1-2 MPH. Runs were more consistent as well. 6200rpm setting is next.
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Old 04-30-2011, 11:03 PM
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nice. you sure are gettin to rack up some track time.
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Old 05-04-2011, 12:01 AM
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Quote:
Originally Posted by catsltd View Post
Thats about as high as Superchips works,before it starts producing a slower shift.
You need to raise your rev limiter also or else it wont shift.
I would raise it to at least 6100 RPM.if your going to be shifting at 5850 RPM.
I think Superchips has a safety feature to force you to raise the rev limiter before the shift RPM???.
I lower my tq managment also to help it shift quicker.
So you run superchips and it allows you to lower torque management?
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