Im building a Lt1 383 thats going to run a d1sc blower and its all going in a 1997 z28 6 speed hardtop.
Now its time to pick out fuel and ignition componets. I am very lost. I have no clue as where to star. i know around the size injector i need but i dont know if i need low or high impedence injectors? Not sure what kind of fuel pump to run? I dont know if i need to run an ignition box and boost controller? If i can still run the stock comp. or even if i need to run the stock comp? I would like to run the stock computer though, if possible. I dont know what im leaving out to ask about. PLease any suggestions will be appreciated. I am trying to go ahead and finish this thing up. Feel free to ask me questions if i left some info out you need to know to help.

 

You need High Impedence injectors I believe the LT1 has to have them, I'm not positive it can be tuned for Low impedence. Walbro 255 is a popular fuel pump. I would run a MSD 6AL or Crane Fireball personally. Not sure about a boost controller I thought those only worked on Turbos, could be wrong though. You are gonna need the computer tuned for the blower and the injectors to change the amount of fuel coming in, and possibly change timing.

 

You can use either, but to run low impedance injectors on the stock PCM, you need an external "black box" with the low impedance drivers in it. They are currently making much larger high impedance injectors than they used to, so it may not be a problem. I prefer low impedance for larger size injectors, because they react much faster, allowing the very short pulse widths required for idle. But I don't have any experience with the newer/larger high impedance injectors.

You have to figure out how you are going to supply the extra fuel for boost. You can use the stock PCM with a boost referenced fuel pressure regulator or you can run the stock PCM with a 2-bar MAP sensor tune. For lower HP setups, you can run on the MAF with the right tune.

In general, an ignition box is a good idea with boost or nitrous.

I think your best bet would be to post this on the Forced Induction forum. Include as much info as you can regarding the boost and HP levels you are going to be running.

 

what is the hp limit for a maf sensor?

 

A possibility is acceleronics.com. I use his low impedance injector driver & low Z injectors on a 97 PCM (97ss 383 D1 MM6). LJ also has information on the PCM for programming, and, injectors. I use LT1_edit version 2.2 to flash the PCM. I currently run two (2) Walbro 255lph intank pumps with a 1/2" (-8an) feed line. Also, a boost ref fuel return regulator, 6A MSD & 8202 coil. I would also recommend a MSD optispark dist since they can handle the additional spark energy and rotor acceleration load. B.

 

FWIW, the stock FPR is boost/vacuum referenced. So, if you have enough pump it will maintain stock FP delta.

Rich