I am have few questions and I was hoping someone could help me out. I am currently running a 406 SB, in my 88 IROC-Z. I have the stock computer with a TPIS PROM and the car runs real fast. I have broken 2 stock rear ends already so I know it has a good amount of power. About 2 weeks ago I believe my stock computer went bad. It won't run for **** and it gives tons of codes for stuff that isn't wrong. With my computer misfortune I see this as the perfect time to upgrade my setup. My car is MAF (mass air), and I have performed all the MAF modifications but I know it is still and restriction on the big stroker motor, and I also believe the stock air cleaner assembly (y shaped thing) is also a big time restriction. Here is the problem. I really don't know what to do. Should I invest some money into a DFI system, I know this would get rid of the MAF sensor and make my car speed density MAP. If yes what is the best system to run, so far I have looked at speedpro(SEFI8LO), Accel old & new Gen VII, Haltech. Now I have tons of options there, would I be better off with batch fire, or sequential, and is the closed loop wide band O2's worth the money. OR should I get a stock MAP GM computer, buy a MAP sensor and convert my harness over to make it a MAP harness and invest a little money into the EPROM burning software and make my own speed density chips. I also would like to let you know that I plan on adding a vortech or ATI supercharger this winter. Will a stock GM computer with programming run with a supercharger making 12-15 psi of boost. Some people say yes some say no. I have had alot of people tell me the stock GM computers are top notch if they have the right chips & calibrations. I have seen a few 10 second buick GN's running stock computers with owner burned chips. If anyone can shed some light or experience on this subject it would help me alot

Thanks
Jason
jnjspdshop@aol.com

 

You only need SEFI when running huge injectors, byt the time your at 2,500 rpm, ther is no difference in the injectors firing strategies.
Don't like the MAF, just switch to the 90-92 system. Does take work but alot cheaper then going with FUEL, or some other setup.
Want to run boost with a MAP system just use a syclone ecm, and modify it.
I've got one of em lil v6 regals and it does just fine with the oem ecm.