I'm sending my TST in to get its wiring harness looked at so in the meantime I figured that I would stack my VA C3.1 with my BDDL that is presently collecting dust on the shelf since I already miss the power!

Do you have to unplug the pressure box AND rehook to stock before downloading a program? I remember reading that you had to and others said you didn't have to, but that was a while ago so I just want to confirm.

 

I didn't bother, works fine

 

Hey let us know how this works. it seems to be a very attractive stack in my opinion; just never tried it.

 

All observations are with the BDDL on Extreme and VA on 100%, BDDL = Version 1.5, truck was not loaded, and EGT pre-turbo:

*It feels a bit smoother than the TST - VA stack in that you don't feel that sudden hit to the turbo that the TST gives you. It feels to pull about the same as the TST on 5x5 and VA=100% but more smoother like being in an airplane taking off.
*Lots more really black smoke at idle to about 2000 rpm. Short shift into 3rd, 4th, 5th, 6th and about 1/2 to 3/4 throttle = billowing black clouds of smoke in one continuous trail (block long). If I wind it out in each gear and build boost, then it's just black cloud - clear up - lighter black cloud - clear up -etc. At idle a quick stab at the throttle gives a pretty big puff of smoke that just hangs there and lingers for a very looong time - good hang time!
*max boost I saw was 40 to 41 psi
*EGT were hotter than the TST stack, but I only saw this in 6th at WOT and I hit 1300 F then backed off. I am sure the temps would have climbed otherwise. With the VA turned off and just there for boost fooling the EGT would get hotter quicker. The boost at this point would be about 38-40 psi and my wastegate is set at 40 psi on the HTB2. Maybe if I could get the boost up more then the temps would come down (I do not run a boost elbow). In comparison, the TST on 5x5 and VA = 100% WOT gave about 1100-1200 F probably due to the extra timing of the TST over the BDDL
*I feel more relaxed driving this stack. With the TST I found I was glued to my gauges more.
*mileage on a 600 mile trip to Reno and back with cruise control on 80 mph = 16.7 mpg hand calculated. The TST VA stack in comparison gave 17.5 to 18.4 mpg over similar driving speeds.
*at steady cruise with the BDDL I get a really annoying surge from 6-8-10 psi boost. Experimented with different VA settings to no avail. Did not have that surge problem with the TST.

Don't get me wrong, I like the TST because of the adjustability and sheer power available provided that common sense is exercised. If the BDDL had the in-cab PROGRAM switchability (not via the Outlook way) and a bit more timing, then that would rock! While it's off getting fixed the BDDL-VA will definitely tide me over. Heck the VA by itself rocks in town due to its low end - very fun! At highway speed however the VA feels like a stock truck when passing.

 

yea, the VA's strong low end certainly explains the smoke. sounds like you've got turbo spool up things going on as well!

 

The power pup on 130 hp setting with any fueling module - will smoke like a train.
The pup on extreeme stacked is impressive - but gets hot.
Stack them with the tst actually run a bit cooler.

 

When I had the original BDDL version 1.0 stacked with the VA it didn't smoke nowhere near as much as the BDDL version 1.5 that I have now stacked with the VA under zero to very low boost levels. Bully Dog must have did some changes to the duration part of the power equation. Now I have to basically pretend that I have an egg under the throttle peddle to prevent getting people, cops included, ticked off unnecessarily at me - except for the one guy today riding my butt, and the lady that flicked her cigarette butt out the window yesterday that landed on my hood,...

I just sent my TST in to get it looked at due to a major timing malfunction. Once it gets back it's going back in and the BDDL is coming out for adjustability and cooler EGT reasons.

 

yikes I wouldn't stack the TST's timing advance with anything else that does timing. you don't know what the result will be.

the hot EGTs of the pup suggest to me that they don't do as much timing advance as TST. wierd. gotta love the TST though. they've done a good job there.

 

yes, well, many have stacked two timing enhancements without knowing how much injection advance the combination produces. Unless you know how much each of these advances timing, and you can compare that with some notion of what a safe advance is, then you're just flying blind. I'm not saying it won't drive, appear to work, or even impress; I"m only saying that doing so is a roll of the dice without some sense of how far beyond the engineered operating point you really are.

consider that each of these devices advances timing within the limits of either the mfgs perception of safety, or the practical limits of the device. stack two of them and all you know is that you're advancing timing beyond what either one is capable. I'm only saying I would not do that myself, nor would I measure the success of such an effort by the absence of smoke and managable EGTs.

 

yea, its a subject that will be discussed forever. However I will suggest that there are reasons why adding prescribed amounts of propane to increase cumbustion efficiency is less insane than adding unknown amounts of timing advance. 40K on the truck may tell us more about the truck's durability than about the sensibility of the power enhancements!

I'd say of all the timing enhancement combinations that would actually run, the BDDL and the Banks are not the most insane. the most insane is BDDL and TST, and there are folks out there doing that too. at the end of the day we all make decisions based on varying degrees of subjectivity and measure success with different methods. Sometimes it takes a risk taker to open a possibility that a conservative analytic would never consider. I'm just not the risk taker

 

george,

what is the highest that you have had both the banks and the bdpp?. how did it run? just curious.