TheLion70x77
Well-Known Member
Exactly right, the biggest downside is upgrade path. You get what you get. But what you get is very well put together. There's the thing, your NOT going to make a whole lot more meaningful power over these tunes on pump gas with similar hardware. So no one would want to upgrade from a Power Pack 2 to an after market 93 tune and CAI. The change is meaningless. In fact some of the after market pump gas tunes make less average power even if they make a bit more peak power based on dynos I've seen. The hardware in the Power Packs 2 and 3 buys them some extra flow over the rev range that doesn't require as aggressive of timing.The PP2 and PP3 are definitely good setups. The biggest downside is upgrade ability (none). Otherwise they make a compelling case for themselves.
And I don't think any of them got the GT350 throttle body to work correctly because of how involved the calibration changes are, at least not without having substantial drive ability impacts that most won't tolerate.
So if you step up to E85 from a Power Pack 2 or Power Pack 3, if your tuner could get the GT350 throttle body figured out, you would just need higher flow injectors and a tuning tool. So you could re-use the entire intake system. Even more so with Power Pack 3, you could make some big top end power on E85 with the whole GT350 intake setup revving it out to 7500 or really pushing it, 7800 rpm. I think some of the transfer ability issues are centered more around the lack of ability of tuners to use the GT350 hardware effectively, but it is possible if they have enough experience to re-use much of the hardware in the Power Packs. But for pump gas, it's hard to beat them as an overall package, including power output.
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