OT-OF-Here

Anyone know the rail pressure of the BDDL?

Cold Diesel

The highest I have seen on Extreme is 22 XXX psi. That is going by the outlook monitor on several 60 to 100+ MPH runs.

AK RAM

Something is not right with that Cold Diesel. When I looked up the specs for the rail in the manuals at Cummins Northwest, it said the rail will run between 3,200 at idle to 23,500 at WOT for 03/04 trucks.

On my truck, it appears to have raised rail pressure 3,000 psi across the board. Stock, it bounced between 3,200 and 3,500 psi at idle. With the BDDL on extreme, it will bounce around between 6,000 and 6,500 psi at idle. At WOT, I was seeing between 23,000 to 23,500 psi stock. BDDL on extreme I'm seeing between 26,000 to 26,500 psi at WOT.

AK RAM

Cold Diesel, have you used the HP/TQ features on your outlook yet? Curious what your results were.

CTDHokie

AK Ram

Out of curiousity how is your trucks idle quality? With a 3000psi jump at idle I would expect it to be a little rougher then stock.

Not sure why BD does not do a better job of maping the fuel pressure adding 3000psi across the board even at idle seems pretty trivial

AK RAM

Idle quality is fine. No difference noted from stock. No excessive pinging or rattling or anything at idle. At least not until we went to winter blend fuel. She pings plenty burning that stuff.

Still quite a lot of pressure though for the pressure conscious folks, like me.

Cold Diesel

AK Ram,
I only have bothered with the Extreme program. Shows 6000 psi at idle and 22XXX is the highest I have seen The HP / TQ feature showed 385 HP and I forget the TQ...I can check it though. Maybe the sensor is NFG on the truck??? Any other ideas?

AK RAM

I really have to stomp on it to get it that high. If I have any pedal left, knowingly or not, it will stop at about 23K/24K. Just having my foot a little sideways, getting caught on the carpet and keeping me from getting that last 1/4" of pedal travel is enough to keep it down a couple thousand at WOT.

I tried mine the other day and it showed 415hp/796tq with the pup by itself on extreme. That was a 2wd launch at 5 lbs of boost, so spin...spin...spin for the first 30ft. I assume it is using a formula similar to the on-line HP/TQ calculators with trap speed being part of the equation. I tried to adjust the tire size on the Outlook so its speedo matched the truck's in hopes of it being as accurate as possible. What is your Outlook tire size set on? Some of the good software dynos that let you factor in gear ratio, tire size, wind resistance, etc., can be as accurate as 2% to a roller dyno. Without being able to change the basic values in the Outlook, like truck weight, I don't see how it can be very accurate. Those numbers definitely make you feel good though.

Cold Diesel

I left the outlook tire size set at 31.75", which is what it was set at. I had the speedo adjusted at the dealer for the 315's when I put them on. When I put the outlook at 34.75" it did not match the speedo anymore. I don't have GPS to confirm, so I am guessing that it is assuming that I have stock tires and settings in the ECM and by changing it to 34.75" it is actually messing it up

gonzy

My rail pressure is at 6000psi no matter what setting I put it on. It also seems to run higher on the stock setting compared to the 90hp setting durring normal driving.. this doesn't seem to be right with what you people are comming up with..

AK RAM

That doesn't seem quite right. During acceleration it should shoot up pretty quick. Almost too quick to see the numbers until it settles somewhere. I would think if your pressure stayed at 6K all the time, you would have a pretty big power loss as well, so there must be some sort of issue with your monitor and not necessarily the downloader. I would check to make sure you selected the correct truck on the outlook. If all looks good there, I would give Bully Dog a call. They have been fairly responsive to my questions and eventually got passed to someone who was helpful. Does it "feel" like it has added an extra 130hp?

Cold Diesel

I did look closer today and after messing around quite a bit I did manage to see 24 XXX psi today.

OT-OF-Here

I'm just trying this thing (BDDL) out for a bit, but this AM was the first I've had a totally safe opportunity to run this thing on up and also keep a close eye on my gauges. What I found was very good IMHO. My EGTs maxed out at 1265 when I hit 80+mph it was there at 1265 and stayed right there up to 90mph and that's where I shut it down. It was a perfect setting with about a 3 mile absolutely straight stretch and only myself to test this thing.

On the Boost side, .....that too was a pleasant surprise, based on other boxes I've used. As long as I was in it hard (WOT) then I was in the mid 20's and it topped out at 27lbs of boost. I should say I was on the Performance setting and not the Extreme. I won't go there with my stock tranny. That is to change by end-of-month.

The only thing I see with this BDDL that is the slightest displeasing so far is that I feel it is a little too touchy when applying throttle from a stop and on wet streets and such. You could get in trouble quick if your not careful.

Perhaps someone who has solid numbers who has ran it on Extreme could chime in, that also has exhaust and intake mods. Unless there are major changes to the numbers it appears this is a bomb a guy could use, at least on the 600 without having to upgrade their turbo.

As you may notice in my profile, I'm running the SRT-10 hood. I think that this is playing some part in keeping EGTs a bit lower. Maybe someone who has basically the same combo Intake and Exhaust that I have could run their rig on Performance and see what they're numbers are. I'd bet mine are lower due to the hood and lower abient air temperature in the engine bay. We'll see.

I'd also be interested in if anyone has had a fuel rail gauge on with the truck on a dyno that could provide some feedback. And I'm not talking about the Bully Dog gauge, but rather a credible test gauge.