well i got home yesterday and saw an old friend that has a C3 denali in the 10's; a 00 corvette, and a turbo diesel. and has done other car work on other friends cars. Well i told him that I started doing my own tuning and I told him that I was currently dialing in my VE table and that I was in SD mode.
He then proceeds to tell me that all of that is a waste of time and that i don't even need to tune my car unless i do a cam and/or a head swap. He said that the car doesn't even use the VE table unless it can't normally operate in normal mode (not SD mode--stock mode..i think thats closed loop?) and that tuning the car in SD mode will have it surging after one track run and that it won't run right and that the car will want to return to closed loop (normal non-sd mode)
he put in a set of LPE heads and a .619 something cam in a ws6 and he said he at first over compensated and changed several tables and then the car ran like shit...then he paid for a professional tune and the comparison from stock to the pro tune was that one table was changed completely and the car ran fine ( i can't remember the exact table he said now) he said that I was wasting my time with Sd mode and dialing in the VE table.
And so i ask you from all that people have done....is this guy even close to being right b/c i have never trusted him??
Other than doing this SD tune and changing AFR I don't see what else you can do to tune a car...maybe change spark tables...but how much of a difference can that make....?? I think he is just nuts...so i walked away and said nice to see you..bye.....
someone please enlighten me on this.....cuz i think he is wrong