gdh11,
Let me know what you think, I'm not impressed w/ the new program. I was thinking I would see more tire spin or sooner tire spin or something. The only difference I can tell is on the big end the pull is more gradual not all of a sudden @ 2000 rpm like before.
Peter T, Is what I'm seeing the norm? No smoke at all. I still like my six gun, I guess I was expecting more.

 

We have found the new programming to be much better in the bottom end where the old programming was lacking, with not a lot of change in the mid range. On the 04 here in the shop we have not noted any appreciable change in EGTs with the program change. We did notice a slight drop in EGTs when a Scotty III was installed to replace the factory air intake.

 

gdh11,
The level that you use is subjective to your EGT’s, but since you have the Speed-Loader, your EGT should limit to a max of 1350 anyway, regardless of level. If it were my truck, I would probably not exceed Level 4 when towing. You should not see an increase in max EGT, but your EGT should rise more quickly than it used to.

tcr,
I would expect you to have more aggressive acceleration, but whether it will spin the tires or not it tough to say, especially with oversize tires. I will say that in all of our testing we try to avoid tire spin in order to eliminate variables. Smoke levels are also subjective, and the more airflow that you have, the less smoke you will have. Of all three brands, I think our Cummins Six-Gun smokes the least. What kind of boost level are you seeing? One thing you might consider is the use of a BigHead Actuator. Since fuel is directly related to boost, you might find that the truck is more responsive by increasing the actuator’s effectiveness. If the stock actuator is blowing open at all, then fueling response might suffer.


Peter T

 

gdh11,
I would not recommend it. Timing is more aggressive in Levels 5 and 6, and when operating under sustained load, that could ultimately be detrimental for the engine. It is not harmful in short bursts, such as an acceleration run, because the RPM is transitioning rapidly.

Peter T

 

Peter T you have a pm

 

Peter T,
After putting some miles on the new program I must say the power band does come in much sooner and smoother. I'm running about 25-26 psi (no big head, and I'm not sure if I want one, sell me on it, what will I see other than 31 psi?). If I'm not smoking doesn't that mean air/fuel is ok, and if it does add more air/boost will the six gun add even more air?? Sorry for my ignorance.

 

does anyone know if the six-gun with new program installed on auto trans equipped truck requires re-learning of transimission slip points? do you simply plug it back in and go? I just received my flashed unit which didn't contain any notes, install instructions, nothing...

 

good info Peter. tell us more about timing and engine durabiilty. you mentioned that the timing was so aggressive on levels 5 and six with the speed loader that it could be harmful to the engine. Can you tell us what kinds of issues that presents? what kind of timing advance are you doing? is the degrees of advance in the low single digits for just the six gun? what about the speed loader?

 

tcr,
Smoke is only one indicator of air/fuel ratio, I would recommend using EGT as your primary indicator of proper air/fuel ratio. If your EGT is below 1300 all the time, then you probably have sufficient airflow for the Six-Gun fueling. If you exceed 1300 or you reach the temperature limiting function of the Speed-Loader (1300 in the lower levels, 1400 on level 6) then more air flow is recommended. According to your signature you already have intake and exhaust upgrades, so increased boost would be the next logical way to increase airflow. The BigHead would accomplish that for you. I would not recommend it unless you need it. Increasing boost without the need for added airflow just causes the engine to work harder and increases the potential for boost leaks or hose joint failures.

gnx478,
Yes, you will need to redo the learning sequence. Anytime that a Six-Gun is reprogrammed this is necessary. If you do not have your original instruction manual, contact our Technical Support at (888) 839-2700 and they can get you a fresh copy.

doug,
Look closely at what I said. I only indicated that engine damage may be an issue when running at high levels for sustained periods. You must remember that the Six-Gun is a high-performance product. It is designed to meet the needs of those who need maximum performance out of their trucks for racing purposes. For those that need to be able to multi-task with it (i.e. towing), the lower levels are recommended. Timing advance becomes more aggressive with each added level. I cannot give you specifics on how much timing is being added at each level, or even how much is being added at any given point, because it is very dynamic, varying with changing RPM, boost, load, etc. Our testing indicates that all the timing values that we have calibrated are safe for use in the recommended fashion. In other words, we have provided those recommendations because we are confident about the results that a user might expect if they adhere to them. The comments I made in the previous post were not intended to instill fear of potential engine damage, but rather to point out the intent of the recommendations.

That being said, it is entirely possible that it would be safe to run on the highest levels while towing, but I do not have the data to support that. We simply do not know the long term affect of such use. I know of specific cases of people towing heavy loads with the Six-Gun on Level 6. The subjective observations are positive (“It pulls the 6% grade at 65 mph!”), but I do not have objective test data that I can point to and say, “Yeah, this will work great every time, all the time.” Maybe it is just our conservative nature, but I would rather offer conservative recommendations and change them later, than go out on a limb and let our customers learn the hard way.

Peter Treydte

 

excelent clarification Peter. good to see a mfg that is cautious without supporting data.