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Old 05-11-2013, 04:31 PM
svt2026 svt2026 is offline
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Join Date: Aug 2011
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Quote:
Originally Posted by RAM EM View Post
Its highly possible your stock tune is inferior to the DS tune in terms of timing advance curves. I'm not a DS tech, but I would imagine the stock tune is more sensitive to detonation than aftermarket tunes, and unnecessarily pulls timing for safety's sake. You have to remember, the same tune is written into thousands of pcm's going into trucks with inherently different mechanical characteristics and will be used in very abstract manners. Chrysler realizes this along with the fact that they have a lengthy powertrain warranty, so I'm sure the tune is written well to the conservative side. I would imagine most guys would see ST/LT KR#'s on a stock tune when driving the vehicle in a moderate/aggressive manner, they just don't have a means to actually see this (no tuner). Conversely, most guys with tuners run the performance tunes and never see it either.
In summation, if you are running a performance tune and are not seeing ST KR #'S over 3-4 w/ 0 LT KR #'s, then you are getting optimal performance from your engine, and are doing so safely. It's only when you get the higher KR #'s, and especially if you hear any audible "pinging", that you should be really concerned.
Thanks for reply.
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