99 northstar in an 88 formula, does anyone tune the ECM's for a 5 speed getrag? (Page 1/1) m0sh_man NOV 10, 01:26 AM i've got a 90k mile motor thats already been head studded, I like the idea of doing the northstar V8 but i'm curious if anyones still tuning them? Will NOV 10, 06:44 PM You can use the " '99 Oldsmobile Shelby" .bin file (I have it if you can't download it from AllData or similar service) in an 0411 LS1 PCM. This computer and .bin combo can be tuned by *ANY* shop that has HP Tuners. This setup only works on '99 and older Northstars. m0sh_man NOV 12, 04:26 PM quote Originally posted by Will: You can use the " '99 Oldsmobile Shelby" .bin file (I have it if you can't download it from AllData or similar service) in an 0411 LS1 PCM. This computer and .bin combo can be tuned by *ANY* shop that has HP Tuners. This setup only works on '99 and older Northstars. Thanks Will, it's been years since i've been in the fiero community and in the last 6 months i picked up an 88 formula 5 speed and a blue 87GT 5 speed. then someone gave me a 99 caddy with a rusted subframe with 90k miles, engine has already been studded and resealed. then i picked up a monte carlo Z34 with 3.4L DOHC engine for $250..... i've been beating around on which engine to put in the formula, and i've always wanted a northstar but knew the tuning was a problem. *IF* the LS1 PCM works then that would definitely be the way to go for me. other than 0411, do you have a part # for the PCM? and do i need the LS1 harness to modify, or just modify the northstar harness for the LS1 PCM. matthew Will NOV 12, 07:35 PM You can google "0411 PCM" and find them available. It's EXTREMELY common in the LS world. The full PN is 12200411 You'll need the connectors/pigtails that are specific to the 0411, which you can splice into the Caddy harness. I can get you the "shield" colors that have the right keying probably next weekend. I'm running this combo, so it definitely works.