Last post on Nov 07, 2008 at 12:44 AM
You are in the Chevy Express & GMC Savana
What is this discussion about?
GMC Savana, Chevrolet Express, Ford F-100, Engine, Van
#7 of 8 Re: [1320jon]
Nov 06, 2008 (10:34 pm)
I have a obd performance tuner that changes almost any of the above settings you mentioned.The only company that makes them for the express/savanna is a place called JET performance in L.A. calif.Ive already changed the shifting and rpm limit.I did put 17 inch wheels with 265 tire on my van from the stock 16 inch 225 tires.The speedo is only off by 2 mph wich i can change with the computer but dont know if i should bother.The unit from jet also shows trouble codes and meanings and can adjust up to a 44 inch tire(if you go body lift and monster on us all with your AWD)actually,that would be killer,having your van jacked like that with some mudders.but impracticle for trips to the 7-11.I get looks all the time on my van with all the after market stuff i put on it like the wheels,cargo rack,rear rack with diamond box,offroad lights,side steps etc.
#8 of 8 Re: [jgarnaas]
Nov 07, 2008 (12:44 am)
There are several tuner software programs that are compatable with the express and the savanna. I have two of them, that are laptop based, with everting from.....
timing maps, knock sensor sensitivity, maf freq,fuel ve tables, pe tables, idle control,ac control,rpm limiters, speed limiters, shifting control for probably 400 parameters, shift pressures, lockup control, gear ratio, diagnostoc control (kill codes permanatly), emmission codes, vats, etc etc etc etc.....the list is pretty endless, even vin number reassignment, speed density conversion, and data logging of every pcm function.
I have found that you can add a rear sway bar to reduce the understeer pretty easy from the ss truck.