Quote:
Originally Posted by Flyntgr
I have an '06 300C 5.7 with CAI. I set the predator at 91 CAI, raised shift firmness, raised shift points, raised rev limiter to 6,450, and at 57 degrees Farenheit, [i]one run only in this tune[i], in auto mode it ran 5.63 to 60mph, 13.99 in 1/4 at 105.8 mph. The best stock tunes were about the same to 60 (if memory serves only one run was at 5.38, the rest about 5.8 or higher), 14.07 e.t., and in another run, 106.2 mph. Most stock runs were 14.2to 14.5 around the 104s or low 105s. With 91 octane setting (without CAI setup, but with CAI installed) it ran a best e.t. of 13.98, but I have yet to fully learn the best launch pedal and optimum shift points. I suspect that I think about 5,700-5900 rpms will give me better e.t.s than the 6,100-6,200 auto shift points.
What rpms do you shift at for best results with just the Predator and 91 CAI tune? The manual shift will let me shift at whatever rpm I want to, up to 6450, so I think these custom mods are good and safe.
[b]Question:[b] Should I add 1% or 2% fuel at WOT higher rpms, or is this not necessary? What other changes do you recommend to this tune? Thanks!
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Okay I have a few suggestions to you and any other 5.7 guys out there using the canned tunes.
Use increased shift firmness, but do not use increased shift points!
On a stock to mildy modified 5.7, the extra RPMS take you out of your powerband instead of keeping you in it. Apparently our engines just do not like additional rpm and if you pay close attention, they seem to struggle a little with the raised shift points.
Its a really weird scenario that I don't fully understood, however according to my Gtech, I lost 2/10 of a second off my times when using the raised shift points.
HOWEVER, though my car did not perform as well from a dead stop, my passing power and top end seemed to be better.
Anyone else with similar experiences?
