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How bad would it be...gol10dr 02-17-2004, 07:44 AM I have a 3.23 Posi rear that I want to put in my car. Currently I have an A4 with 3.08 open rear. I'm worried about my shift points, among other things. Hoow bad would my shift points be off. I know I can get the PCM reprogrammed or buy an SCU 2000 and it would correct that. But I'm excited about having a posi disk brake unit on my car and want to put it in without having to wait to save up another 250 or more for the computer. Lasombra52 02-17-2004, 09:32 AM to be honest, it would only be off by a little. That isn't a huge change. You will however feel the difference since your going to posi. Speedo will be off, so will shift points. I'm no expert, but I'm thinking speedo off by 1 plus whatever gear you are in. Like 4th gear, 5 miles per hour off. Shift points will not be noticable. darkoverlift 02-17-2004, 10:21 AM Here is a question. Sine he had a v6 with 235 55r16's would 245 50 r16 or 255 50 r16 correct the difference? MustangEater82 02-17-2004, 10:26 AM I am not sure but it shoudl help it.... I have heard people having problems going from 3.08s to 3.42s...you coudl always try it... but as a warning your odometer will read more miles... I didn't mind it on my 94, since it already was over the hill, but not sure of your thoughts on your car... did you ever look into the Jet SCU? MustangEater82 02-17-2004, 10:33 AM Jsut a quick search... I woudl double check on www.firebirdv6.com if it works on your specific year but... http://shop.store.yahoo.com/autoaccessconnect/scu20spcounb.html http://www.fullthrottleraceparts.com/jetscu.htm Like new used one... also states it works on 96 v6 http://www.f-bodyhideout.com/ubbthreads/showflat.php?Cat=0&Number=22169&page=0&view=collapsed&sb=5&o=&fpart=1 Look at the last question in this FAQ from Jet http://www.jetchip.com/faq.htm And 3rd form the bottom here... http://www.ammperformance.com/V6CompElec.htm gol10dr 02-17-2004, 10:35 AM I'm not sure a wider tire would correct it, I think make it worse. The 245 50's that i have on the car now are a 0 fit tire, meaning it doesn't adversely effect the speedo. I have looked into the Jet SCU but again we are talking another 250 bucks before I can get this rear on the car. and with my current traction issues at OSW it's driving me stupid. MustangEater82 02-17-2004, 10:44 AM I found the jet scu for like $135 in one of those links, and someone was selling one used for $95 darkoverlift 02-17-2004, 10:45 AM Top link, the yahoo one says 129 for the jet scu. Not a bad deal.. | ||