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Discussion Starter · #1 · (Edited)
I have a new 2012 Outdoorsman with the Hemi. My best friend just bought a 2011 Crew GMC Z71 with a 5.3. We ran the trucks yesterday and we were pretty even. I wonder where my other 70 HP is? His truck is rated at 320 mine at 390. He has a 3.42 rear end and mine is a 3.92. I turned traction control off and put it in 5th gear. I will have to admit I was kinda disappointed. On trucks as equal as ours are I would think 70 horsepower would make a difference

I came home jumped on the internet ready to order the latest and greatest programmer to give my truck every benefit. It became clear there is none. I have defected from the GM camp myself where I have had a multitude of programmers on my trucks.

I find information here that says Chrysler has encrypted the software so that nobody can break the code. That does not make much sense to me. I understand that Chrysler is under pressure by the govt and cafe but why not make it easy for customers who want to turn off the MDS and increase horsepower at the cost of gas mileage can.

So I guess my big question is does anyone know why not?:4-dontknow:
 

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They eventually will have to release the info. It took awhile for the 09-10 models to get a tuner as well. PCM swaps have been popular lately I believe!
 

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Why not? Warranty claims. Easier to keep you out than to prove you did damage.

How far/fast did you race? I wouldn't expect more than a half second difference in a quarter mile if both trucks are stock. That's still "pretty even" and tires, suspension, driver skill, load are all enough to swing it.
 

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Discussion Starter · #5 ·
My guess is about maybe a 1/8 mile + or - . I was running about 68 MPH. I guess I just thought having 70 more horsepower and 55 extra lb ft of torque. Plus having a 3.90 Rear End vs a 3.42 in the GMC. Has anyone elese had any kinds of these experiences. My Dodge salesman made it out that this truck would run away and hide from anything but an Ecoboost Ford. Of course you know the old saying "How do you know if a salesman is lying to you ?" His mouth is moving........


I guess I ask "Why Not" cause if the GM's and Ford and Toyota will stand up to it I figure the Ram would. If my buddy decides to put a Westers or a Diablo Tune in I dont have a chance.
 

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I know when my truck was stock I could easily walk all over my buddy's chevy ext cab. I have been to the track and the only "trucks" that could get me were the single cab tundras.
 

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Not sure if it is true in the newer dodges, but the transmission has taller gears than the chevy tranny. So, a 3.92 in a dodge isn't as aggressive as a 3.92 in a chevy, because of the transmission gearing. I have 3.92s, and my buddy had an 04 chevy rclwb with 3.55s, and he would rev to the same rpm as me and shift, but he shifted out of first at 32 ish, while I shifted out at 43 ish. We both had 33s on at the time, so the tires weren't a factor. I was still faster, though. lol

- Christopher
 

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did he tune the the chevy, i would have thought you would stomp him. are you shore you have a hemi under the hood and not the 4.7?
 

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Discussion Starter · #10 ·
Huntergreen,

Well on the Window Sticker it says Hemi on the Badge on the Fender it says Hemi. Maybe they did make a mistake and put a 4.7 in there. LOL We were both surprised but I really thought that my truck would walk away. I'm 100% sure that he has no mods. Maybe its because it only had 150 miles on it. By reading the manual online it says 89 Octane for Optimal Performance. I think I will try that. Maybe the 2012 have a different tune in the computer?
 

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IMO something is wrong with your truck or that GMC is not stock, I kill 5.3's all day!
 

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Do you only have 150 miles on the Ram? If so, finish the break in period before you do this again (Minimum 500 miles....1000 is better). I think you will be happier. :)
 

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Do you only have 150 miles on the Ram? If so, finish the break in period before you do this again (Minimum 500 miles....1000 is better). I think you will be happier. :)
x2


I noticed i big jump in performance around 1200 miles.


I walk all over all the Chevys in my area and even the Ecoboosts. Granted I have bolt ons, but i dont think they really made that much of a difference. LEt your engine break in and call him out again :)
 

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Maybe tranny

I am no expert, but didn't the "6" speed trans on new trucks come out? I bet having the "extra" gear(lol) may be causing a not so quick 0-60 so to speak as the 5 spped did.

Just a thought.
 

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Huntergreen,

Well on the Window Sticker it says Hemi on the Badge on the Fender it says Hemi. Maybe they did make a mistake and put a 4.7 in there. LOL We were both surprised but I really thought that my truck would walk away. I'm 100% sure that he has no mods. Maybe its because it only had 150 miles on it. By reading the manual online it says 89 Octane for Optimal Performance. I think I will try that. Maybe the 2012 have a different tune in the computer?
OUCH!!!! I have a 4.7 under my hood. I'm pretty happy with it.
Lower octane will allow for easier combustion of the fuel air mixture. There's a reason why the 4.7 has duel plugs for each cylinder. It's because straight ethanol can have an octane rating of or up to 115, and that takes extra ummpffff to ignite it. Don't run anything higher than 89 octane, unless you start hearing some knocking. During the summer months (Texas), when it's super (108 - 110), the fuels at the fuel pumps should be reformulated to match the temp. If you are towing a boat, going up hill, and it's hotter than sin outside, you may want to bump up to the next higher octane rating because the increased compression and heat might may cause what some refer to as pre-ignition (knocking). Emphasize "might".

Other than that, I wouldn't dump the extra cash in to the purchase of mid grade or premium.

Break-in what's left to break-in.
Change your oil.
Empty all access weight (tools, girlfriend...)
Meet your buddy for another run.
Chat for a while until your engine oil has had a little time to cool.
Make sure A/C and whatever else is turned off.
Meet him with just a 1/4 tank of gas (it's heavy).

If it makes you feel any better, my city uses GM vehicles for police use. Our Chevy Tahoes are screamers (M4 carbine, 12 ga shotgun, lowered a few inches, and paid to drive these over a 100 mph!). Our neighboring city uses Chargers and they are amazing, but they were told to BREAK THEM IN FIRST.

Break your truck in first before you break your truck.
Just my $0.02
 

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One other thing i thought of. Putting it in 5 really doesnt nothing, you need to shift it yourself to use the
"prime" gears which for my usually makes a big difference.


Just put it in 2nd and once you hit second bump it to 3rd and once you hit 3rd bump it to 4th and so one. Stay one gear ahead of yourself and you should do pretty good
 

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Discussion Starter · #17 ·
Well I thought I read here that by locking into 5th gear it shut off the MDS? I could be wrong on that cause I have only had the truck 1 week.

The 150 miles is how many the HEMI has. His truck has about 2,600 miles. I'm 100% sure he has no mods on truck.

What did you all do or NOT do during the break in period? At what mileage is it considered broke in?

Thats true about the fuel my truck has the bigger 32 gallon tank. That could be an extra 200 lbs in fuel.

You guys talk about eating these 5.3 what years are your trucks?

Does anyone know if something changed in the 2012 model?
 

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Locking in into 5 will disable the MDS but when your racing the MDS will never be on anyway. Actually shifting it through the gears like SS4Luck mentioned will keep your engine at a higher rpm while shifting and that does help.

My Ram is a 2010 but it is a reg cab swb 4x4 on 17" wheels with 3:92 gears. I have raced just about every combination of Chevy truck including the 6.2 Escalade and I was never worried about getting caught by any of them! Even a 2wd ext cab eco boost couldn't keep up although he was gaining on me at the end.

I have never met up with one but the only truck out there that I would be worried about would be a 2wd version of my truck!


.
 

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Discussion Starter · #19 ·
SS4Luck,

What kind of bolt on mods have you done to your truck.; Also do you put your truck in Tow/Haul? Do you turn off the Electronic Traction Control? By placing it in 2nd gear to start off with does that lock the transmission in 2nd and bypass 1st gear?
 

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I have long tube headers, catback and a cai.

No by putting the gear selector in 2 it will only let the truck shift as high as second gear.


I race in to haul with the traction control off in 4wd auto
 
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