i'm in the process of installing twin turbos on my 2000 gmc yukon. and i wanna know what type of electronics would i have to buy to add to the stock electronics for it to run. truck started off as a 4.8 but i changed it to a 5.7 and i wanna use stock ecm from 4.8. do i really need a dyno tune or what to do on the tune side. any help would be great.

 

as far as electronics, your gonna need a fuel pressure gauge, boost gauge, and air/fuel ratio gauge to monitor everything. best bet would be to get a 2-bar map sensor so the computer will know whats going on too. upgraded injectors and fuel pump too. and definitely get it tuned well.

 

Your 4.8 ecm will be fine. Your gonna wanna get a good base tune using EFILive or HPTuners. Then tuning on the dyno would be great to extract the most you can out of it.

 

thanks guys that helped out alot. i live in vicksburg, mississippi, does anybody know any dyno tuner close to me? and how much does the tuning programs you named cost and where do i get them from and how do i use them do i need a laptop or is it a handheld programer cause i don't wanna screw up something. this is my first efi project i'm a old school carb guy

 

Might want to talk to one of the sponsors that tunes and have him handle it. You can't just buy efilive with no knowledge of it and tune a twin turbo truck.

 

you are a good ways away but i will be taking mine to John that used to tune for XXX motorsports in pensacola,FL

pm me if you would like his number...
he will Dyno tune it or street tune it... IMO he is THE BEST around our way..

like i said...
and James@RWTD is good but is never in town anymore

 

The GM tuner for XxX walked, the owner pointed me to RWTD in Mobile.

 

like i said...
and James@RWTD is good but is never in town anymore