409CI

Anyone else update their H&S tuner and adjust their injector timing? I did mine last friday and can feel a top end difference in power and sound. Not sure yet how the mileage will be affected. Next month I have a pretty good road trip planned and will watch it closely. Running the 60 hp tune and level 3 timing which is the default setting, stock is 1. So far I like it, ill let you know what else comes of it.

BM

simoniz

Did your engine noise increase much?

Blake Clark

When I had the H&S on level three I would get quite a bit more chatter out of it. Dropped it back to level 2 and it quieted down, but the mileage did decrease a bit.

409CI

A lot more whistle than anything, I don't notice much for clatter. I only have 6K for miles so that may have something to do with it...

dodgebre3500

Up dated mine today,ran it on hot and level 4,it has lot more power and pulls hard,love it.going to leave it on wild and level 4 for awhile and see how the fuel mileage is,then to level 5 and try that out ,got my head studs in so can play a little,laugh alot

dodgebre3500

Well,run injection timing on level 5 and the hot setting today,and i think i might know what EFI is going to be like,throttle responce was instint and the HP and torque were unreal .From 60 miles a hr to 100 miles a hr was in two shakes of a lambs tail ,egt's never went over 1150.RAN it for over 30 miles on the hiway and avg.20 miles to the gallon,run it on wild and level 4 for the last few days and avg.22 to 23,pretty dam good for a big truck,like i said before ,play a little laugh alot