Originally Posted by
metroplex
Thanks guys for the suggestions. I actually have not personally experienced/seen these spikes with my tunes. I see these on others' dyno sheets from time to time, and the expert tuners on these discussion groups always ridicule those tunes, etc... but rarely does anyone offer suggestions or tips on reducing these spikes. These are the spikes that usually occur below 3500 RPM, and under normal drag racing conditions, this seems to be a rare operating condition other than perhaps launching. The gear ratios on the 6F55, 6R80, 10R60/10R80 keep the RPMs very high after each WOT shift. And even under the hardest of launches, I have yet to see these type of spikes. Maybe these "tuners" were messing with VE or WGDC tables that they shouldn't have been messing with?