Originally Posted by
InTruckDesign
Hey guys, just swapped out my stock 87mm throttle body with a 90mm LS3 throttle body instead of doing a p&p on my stock unit. Only issue that I am seeing is that the rpm's seem to hang a little when coming to a stop...say if I were at 2000rpm and let off while coming to a stop the rpm's will come down normal then around 1200-1400 rpm it hangs for 3-4 seconds, then slowly continues down to idle speed. I have not adjusted my tune yet, just trying to get an idea of what areas I should concentrate on. Attached is a log from today, ambient is high 80's F to low 90's F with a 60-70 percent humidity.