Prodigy Performance 3.6 Turbo DIY Install

[UselessPickles]

A quick search found a forum post from someone with a 2012 Wrangler that got confirmation from a service department that it is NOT compatible with E85.

As far as I know, all the FI kits for the 2012+ Wrangler are now using the Diablosport InTune for installing the tune, and only one tune is provided. The InTune can hold multiple tunes on it, but it takes about 10-15 minutes to go through the process of installing a different tune. No "quick" switching between tunes. Prodigy's tune requires minimum 91 octane.

I have been running the tune for 3days now and like you all the improvments are verry noticable, the engine is running much smoother and the acceleration and power delivery comes in steady

It seems that everyone is in agreement that the new tune is a huge improvement. Now the question becomes: has anyone experienced any issues with the new tune (besides Bkeef's strange error code)?


I'm still running into a jerk/lurch in acceleration sometimes while accelerating through about 2500-2700 rpms. This is with part-throttle, somewhat quick acceleration in 1st gear and sometimes noticeable in 2nd gear. A typical situation where I experience this is turning onto a major road from a complete stop, not stomping on the throttle racing, but just smoothly pressing on the pedal to get up to speed reasonably quickly. Right as I pass through about 2500-2700 rpm, the Jeep will behave as if I quickly lifted off the throttle slightly, then jabbed at the throttle to briefly accelerate more quickly than I previously was. It shakes the Jeep enough for a passenger to notice it and think that I was being sloppy/jerky with my throttle control, or even think that I had just completed a rough shift (manual transmission).

I'm not sure if this would even show up as an issue with automatic transmissions, because it seems to require accelerating through that RPM range within a certain range of engine load, and I'm not sure whether the auto trans will allow it.

Anyway, that is the only complaint I have about this new tune as of now. Everything else about it has been awesome. I would like to try to determine whether what I am experiencing is is unique to me and my jeep (less likely to be a problem with the tune), or is anyone else still experiencing a similar problem (very likely to be a problem with the tune).

Has anyone considered a wastgate controlloer? Wouldnt they help stablize the compressor even more and stop the possibility of surging?

There should not be any concern about compressor surge. Compressor surge would be caused by an improperly sized turbo for the application. If there was compressor surge with this turbo, we would all be experiencing it.

If an install error, exhaust leak, etc., were somehow the cause of compressor surge, a boost controller would not help avoid this, because a boost controller only regulates boost pressure. Boost controllers only have the ability to get more boost than what the wastegate spring would naturally allow, which means it holds the wastegate closed and forces the turbo to work harder than usual (more likely to get into a surge condition).

[gbaumann]

I'm still running into a jerk/lurch in acceleration sometimes while accelerating through about 2500-2700 rpms. This is with part-throttle, somewhat quick acceleration in 1st gear and sometimes noticeable in 2nd gear. A typical situation where I experience this is turning onto a major road from a complete stop, not stomping on the throttle racing, but just smoothly pressing on the pedal to get up to speed reasonably quickly. Right as I pass through about 2500-2700 rpm, the Jeep will behave as if I quickly lifted off the throttle slightly, then jabbed at the throttle to briefly accelerate more quickly than I previously was. It shakes the Jeep enough for a passenger to notice it and think that I was being sloppy/jerky with my throttle control, or even think that I had just completed a rough shift (manual transmission).

Could not have written a better description of the "surge" us magnuson guys experience. Spot on right down to the RMPs! And I do have an auto trans. I know you're chasing turbo issues but I offer the observation in wondering if the aftermarket tuners could be missing the same thing regardless of the forced induction system.

[Timmy]

Could not have written a better description of the "surge" us magnuson guys experience. Spot on right down to the RMPs! And I do have an auto trans. I know you're chasing turbo issues but I offer the observation in wondering if the aftermarket tuners could be missing the same thing regardless of the forced induction system.

Hey guys. I read this and thought "oh, I've experienced this on my Audi." Any time I get exactly what Pickles describe, a smooth, linear hard acceleration, and then I get what feels like a small blip in power, I've learned, it's gas with too low of octane or is not good enough. I've driven with 93 octane gas and had my 93 octane tune loaded and it would do this. I drop down to the 91 octane tune and the issue would go away. When I lived back in the mid-west (and don't get me started on "mid-west," I have an issue with that word just like my "High Altitude" verbiage issue) I could almost always find 95 octane, so I just ran that with my 93 octane tune and my issue was gone.

Now, you guys are must more technical about all this stuff than I ever am, BUT, if you haven't tried already, try to get some of the best gas you can find and see if it helps at all. If you're in the mid-west to north east, you might even get lucky and be able to find 95 octane! It's worth a tank of gas to see if that resolves the issue.

[Urgh... couldn't help it... How can you have a "Mid-West" that is East of Central!!!! Stupid. If you ever here me refer to "Mid-East" that means the "Mid-West" area, not overseas.

Worst possible sentence ever... "I drove from the Mid-West to the High Altitudes of the Rocky Mountains."
Translation: I drove from the Rocky Mountains to the Rocky Mountains so my Jeep could fly above the ground.]

[UselessPickles]

So are you saying that there may be something in the way pressure is equalized across the throttle body at part throttle?

No, it's just the very different ways that superchargers and turbos work, and that the purpose/function of a supercharger bypass valve is very different than a turbo wastegate. A wastegate will never cause a sudden change in power delivery like a supercharger bypass valve can.

Any time I get exactly what Pickles describe, a smooth, linear hard acceleration, and then I get what feels like a small blip in power, I've learned, it's gas with too low of octane or is not good enough

Hard accelerations are actually smooth for me. It's the part throttle light/moderate acceleration where the problem happens. Also, the tune requires minimum 91 octane, and I'm running 93 octane (91 isn't very common around here).