Quote:
Originally Posted by sincity300c
I noticed this also. I ran 14.4 and 14.5 last week and i had my diablo predator tuned for raised shift points and i felt that when i went over 6,000RPM that my acceleration wasn't was weak. and as i see most 5.7s are getting to 13.9 in 1/4 mile. i am goin out to the track tomarow so i will let you know what my new times are after i lower shift points
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Okay please do! Your times seem to closely reflect mine while using the raised shift points. I highly recommend the 180 thermostat before you hit the track though. After a few runs with just the 93octane tune and a filter, my coolant temps were hitting 240!!! Thats only 15 degrees below my coolant boiling!
And most people on here beleive theres a significant power loss due to heat soak around 215-220!!
But to give you an idea what to expect, here are my times. Forgive me if my mph is off from my previous posting, i'm pulling these from the top of my head.
Stock (just filter + plugs)
14.05@101
Diablo(93+normal shift points)
13.80@102.5
Diablo(93+raised shift points) 14.20@???(i deleted the file)
I don't have real track data to support my claims, but my trusty ole Gtech has always held up to scrutiny on my past vehicles, so these times should be strongly considered.
However according to the few stock 5.7 dynos that I have seen, our power seems to trail off right before shifting using the stock shift points, so increasing the shift points will just make it worse. On V8 vehicles, more RPM does not necessarily mean more power.
