Bully Dog reg tune vs premium tune data log

sudden urge · 11-01-2008, 06:22 PM

I finally ran some logs on the BD regular tune with +2 timing and compared them to the BD premium logs. At the track, my Titan ran faster each time running the reg+2 tune than the premium tune on two different trips. That includes running the premium tune with +2 timing and 0 and -2 timing. I only logged RPM, timing and AFR volts banks 1 and 2. My software is slower than Uprevs, so I recorded both AFR banks on 4 separate lines to get more readings.

What I found was each BD+2 timing tune (reg and premium) ran fairly identical. That being the timing ran up to 35-36 degress at about 5500 RPM, neither showed any detonation where the timing got pulled other than shift point. Now the difference was in the AFR, the premium tune ran 12.9-13.3, and the regular tune ran a 12.5-12.9 AFR. It appears my Titan runs a bit faster in the 12.5-12.9 AFR range. Anyway, I thought I would share my findings.

firelife25 · 11-01-2008, 11:19 PM

if your not running 91 or higher with the premium tune you wont see a gain...what are you running?

sudden urge · 11-02-2008, 03:57 AM

Quote:

Originally Posted by firelife25

if your not running 91 or higher with the premium tune you wont see a gain...what are you running?

I ran with a mix of 89 and 93 octane. Previously, I track ran with all 93 octane and all 89 to see if there were any performance differences. The 89 octane performed just as well as the 93 on different tune selections with and without timing added or subtracted.

TitanGreg06 · 11-02-2008, 09:58 AM

Doesnt it take a few hundred miles for the ECU to learn the new tune? I was wondering if you took the time for it to hit the new values or if you did this all in one day? I could be wrong but I think I read something on here about the ECU learning and my 06 felt like it took time to see a real difference when I got a new tune from uprev. That could have been just me though.

sudden urge · 11-02-2008, 10:16 AM

There's no learning with a tune. That's why they able to do dyno tunes the same day.

Leadsled124 · 11-02-2008, 01:03 PM

Quote:

Originally Posted by sudden urge

There's no learning with a tune. That's why they able to do dyno tunes the same day.

It does take a short time to to learn before hitting its fuel targets. But if the targets are close it will learn very fast. The titan loves fuel. under 13 AFR is where you wanna be. Actually i think optimum is 12.86 AFR

sudden urge · 11-02-2008, 03:53 PM

Quote:

Originally Posted by Leadsled124

It does take a short time to to learn before hitting its fuel targets. But if the targets are close it will learn very fast. The titan loves fuel. under 13 AFR is where you wanna be. Actually i think optimum is 12.86 AFR

I can't disagree with that number, but dyno numbers say 13.8 is where its at. I happen to disagrree with 13.8, but we will see soon.

Leadsled124 · 11-02-2008, 07:23 PM

Quote:

Originally Posted by sudden urge

I can't disagree with that number, but dyno numbers say 13.8 is where its at. I happen to disagrree with 13.8, but we will see soon.

13.8? that sounds lean. when i feel a flat spot in the power where it is not pulling hard i notice My AFR is closer to the 13.5 range where the rest of the truck is running around 12.8-13 @WOt

Also i have an idea for a way you can try and mount the MAF sensor Sudden. I havent had time to reinstall my S&B and reflash to try this for you guys yet, since i keep changing b pipes and adding cats etc...
After looking at my injen i notice a big tower and that the MAF doesnt fit as far inside the tube as my S&B. I think the step in the S&b is making the air "bounce" around the MaF. If you can try to space it out farther, (almost the size of the aluminum spacer included, use 2). I shot up from 220 to 270 gms in certain spots
Let me know if you try. Other wise ill see if WARP will try for you guys.

firelife25 · 11-02-2008, 07:26 PM

my truck noticed a diff between 87 and 91 fuel it ran much better with the 91 and prem tune in my case..

sudden urge · 11-03-2008, 06:47 AM

Quote:

Originally Posted by Leadsled124

13.8? that sounds lean. when i feel a flat spot in the power where it is not pulling hard i notice My AFR is closer to the 13.5 range where the rest of the truck is running around 12.8-13 @WOt

Also i have an idea for a way you can try and mount the MAF sensor Sudden. I havent had time to reinstall my S&B and reflash to try this for you guys yet, since i keep changing b pipes and adding cats etc...
After looking at my injen i notice a big tower and that the MAF doesnt fit as far inside the tube as my S&B. I think the step in the S&b is making the air "bounce" around the MaF. If you can try to space it out farther, (almost the size of the aluminum spacer included, use 2). I shot up from 220 to 270 gms in certain spots
Let me know if you try. Other wise ill see if WARP will try for you guys.

The 13.8 AFR was Uprev dyno tuned on dbolemis's Titan just recently, that's what I meant when I mentioned that number. It might have produced good numbers on the dyno, but I think it will not work the same at the track. I'm pretty sure that is what BD did when they had their Titan on the dyno with their premium tune. We'll know soon when dbolemis runs at the track, he has another tune he runs everyday that has a 12.5 AFR. I hope he does a run on each tune, and I have a hunch his 12.5 AFR will run faster than the 13.8 dyno tune he just got.

The MAF spacer idea sounds very interesting. I imagine you can fabricate a few different spacers at a different thickness and fine tune the AFR if that's the case. That would be great for everyone that is not Uprev tuned. I don't have the material or equipment to fabricate anything like that. If you look at the stock OEM tube, the MAF sits in pretty low like the S&B. Anyway, the idea sounds very interesting. I wonder how much that large indent ahead of the MAF mounting on the S&B tube affects the flow readings?

Timmay81 · 11-03-2008, 08:48 AM

13.8 is to lean for pump gas imo, id personally never run leaner than 13.3 or so on just normal pump gas

Leadsled124 · 11-03-2008, 03:35 PM

Quote:

Originally Posted by sudden urge

The MAF spacer idea sounds very interesting. I imagine you can fabricate a few different spacers at a different thickness and fine tune the AFR if that's the case. That would be great for everyone that is not Uprev tuned. I don't have the material or equipment to fabricate anything like that. If you look at the stock OEM tube, the MAF sits in pretty low like the S&B. Anyway, the idea sounds very interesting. I wonder how much that large indent ahead of the MAF mounting on the S&B tube affects the flow readings?

That indent is there for that reason exactly. S&B told me it was so the air will be directed into the MAF sensor. I think it is just too abrupt and the air is going over the sensor. I may be wrong but looking at the other "tuned" intakes they do not seem to sit so far in the tube. Maby you could find somthing cheap at an autoparts store to space between the billet adaptor and the tube. Then RTv silicone it temporarily since that can all be cleaned off with some break cleaner and a rag/razorblade.