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Discussion starter · #21 ·
The software is Chipmaster Revolution (CMR) and is what Diablo uses and MOST of the Dodge/Chrysler aftermarket folks use. Superchips (SCT) uses something different and is less popular among Dodge products.

I'm using a Trinity because of the additional datalogging and monitoring features but the same thing can be done with the intune.
 
Very nice write up!! You did a great job on the install, and to make it a family build is even better! Congrats
 
Discussion starter · #25 ·
The shop that did the welding for my O2 sensor is closed for the weekend so I'm going to try to find someone else that's open this weekend that can put the sensor in. Hopefully I can get some datalogging in this weekend. I'll try to get a video this weekend as well.
 
Discussion starter · #29 ·
What does this do sorry don't know
If you're asking what a supercharger does: it compresses air and shoves it into the engine so that it can be turned into more power.

An internal combustion engine is basically an air pump. The more air you can efficiently get into and out of the engine, the more power you will make.

This takes the stock 5.7 and (according to Whipple) produces about an additional 150hp at the wheels.


It increases the fun factor of a Durango by 20,000 basis points.
Also, this!
 
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any concerns with overpowering the torque converter or driveline? were injectors/fuel pump and pressure good to your power goal?

Sorry so many questions, I come from the FWD drag racing world where I know what is needed at what power level. Very interested to see how this pans out for you
 
Discussion starter · #31 ·
There's always a concern with finding the weakest link but the torque converter is the least of my concerns. With the torque management software limiting how much power gets to the wheels, the benefit of a high stall TC is limited on an AWD. I feel as long as I keep an eye on my transmission temps I should be ok for a while.

According to the world wide web, the ZF 8-speed is supposed to be good for 700nm (hence 8HP70), which is about 515 lb-ft. The same transmission is used in the Jeep Grand Cherokee SRT and there are a handful of low-boost SRT's running around on stock transmissions. If I end up frying mine, Southern Hotrod (SHR) has an upgraded version of the 8HP that I'll look into.

The injectors are 65 lb/hr and the fuel pump is stock with a booster from MSD, commonly referred to as a boost-a-pump or BAP. There's no doubt in my mind that I've got plenty of fuel for the boost level I plan to stay at for a while.
 
Discussion starter · #33 ·
Awesome. Didn't know that it shared the same trans as the SRT Cherokees.....
As well as a few other brands and FCA models. ZF has been a major player in some of the European luxury brands for the last 5 years or so. Audi, BMW, Bentley, and Jaguar have all used them in one trim or another--I'm sure there are more.
 
Discussion starter · #35 ·
I'm working with Johan on getting the tune smoothed out. We're only on the 1st revision of the baseline tune but I'm still running very rich--I'm sitting about 10.0-10.6:1 throughout the powerband and apparently ~11.5:1 is where the Hemi likes to be at WOT. I will be sending another log today to get some more fuel pulled out. Apparently 65lb injectors and the MSD pump is going to be more than enough for my boost level.

It stumbles under a heavy load but I believe that's coming from the rich AFR because of the black smoke that puffs out the exhaust as it stumbles. I initially gapped my plugs down to .028 but opened them up to .030 after the baseline tune because it was WAY to rich. Once the tune gets a little leaner I'll close it back up to the .028 that Whipple recommends. Even with the rich AFR and less-than-perfect tune, when it gets into boost, it takes off like a rocket until the rich mixture ruins all the fun, lol!

One of the benefits of having someone else do the install for you is they can adjust the tune in real time on the dyno but even that takes several back-to-back pulls. This just takes a little longer because of the delay between pulls (logs).
 
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While I would have just gone with Whipple's can tune as they have the GM tunes down pat, your way is probably best for max performance.
Plus after this I know Johan will have the tune to set one up pretty close right off the bat.
Well done and thanks for blazing the trail.
 
Discussion starter · #38 ·
Are you worried that the overly rich AF is going to damage the Cats.....
Nope, I don't even care the tiniest bit about the cats. If they get damaged then I will replace the exhaust manifolds with some catless longtime headers. I'm not going out of my way to destroy them, but that's not a huge concern of mine.

...and why is the O2 sensor not trimming the fuel back.
I'm fairly certain that the shop that installed my wideband O2 sensor bung didn't remove the stock sensor from the pipe before welding. I'm pretty sure that the heat and electricity shorted the 1/1 sensor and that's part of the reason it's not trimming back. I occasionally get a code that might have something to do with the sensor's heating element but I've been able to clear the code. I'm going to order a new O2 sensor and see if the code goes away and if that helps to trim things back up.

While I would have just gone with Whipple's can tune as they have the GM tunes down pat, your way is probably best for max performance.
Plus after this I know Johan will have the tune to set one up pretty close right off the bat.
Well done and thanks for blazing the trail.
Thanks, I'm sure their canned tune would have been just fine. I'm also sure they have both Ford and GM products figured out but as any tuner that has spent some time with the Gen3 Hemi will tell you, the Hemi is just different. Lots of folks have made the VERY EXPENSIVE mistake of thinking that just because a shop can tune GM and Ford products--or even Honda, Toyota, Subaru, etc, etc, etc..... that they will be able to tune the Hemi. I wanted the Trinity for datalogging and I also wanted the tune file in CMR format to make it available for aftermarket tuners. Whipple would not offer the tune file in any format other than SCT so that eliminated their canned tune for me.
 
Great insight into the process...I will be going down this road in the fall. I have been debating Whipple and RIPP...

I'll be doing dyno tuning next week which should wake my hemi up! As you said, they are just different than GM, Ford... Not that its asleep but I know its got more...I've heard that the AFR's can go into the mid-high 12 range comfortably...I was up to 11.9 max at WOT just last week and my mechanic said it was still rich. Could be different with your boost?
 
Discussion starter · #40 ·
Great insight into the process...I will be going down this road in the fall. I have been debating Whipple and RIPP...

I'll be doing dyno tuning next week which should wake my hemi up! As you said, they are just different than GM, Ford... Not that its asleep but I know its got more...I've heard that the AFR's can go into the mid-high 12 range comfortably...I was up to 11.9 max at WOT just last week and my mechanic said it was still rich. Could be different with your boost?
Yes, NA motors with basic bolt-ons can get into the 12.5-12.8:1 range comfortably. Big cams, head work, or about anything else beyond basic bolt-ons are probably better off in the low-to-mid 12's.

Boosted motors are happiest in the 11.8-11.8:1, with 11.5:1 being the goal. Anything 12:1 or thinner is way too lean and detonation will soon follow.

All of these numbers should be the goal at WOT--not idle and not cruising at part-throttle. I've read (not my personal experience) that you can even be in the 14.5-15:1 range at idle even with boost, but it needs to fatten up pretty quickly. Also, these are GASOLINE numbers: E85 can shift about 1 number leaner before you start knocking: 11.5:1 becomes 12.5:1, and so on.
 
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