NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post

IROCdan330 · 11-15-2005, 05:23 PM

update guys:

After a little diag, turns out my fuel pump wasn't cutting it. replaced the fuel pump a few days after this with a walbro 255, as well as having my valve lash reset (a few valves were too tight). i put it on the dyno so i could get some wideband information for Jon (Fasterthanyou), and it turns out this time around the a/f ratio was so far off (too rich) that it went off the scope...still put 226 down at the wheels for horsepower with a 20# injector constant in the comp, and too high of fuel pressure. i checked the pressure the next day, and instead of the AFPR being bottom out at 44psi, it was well over 50 psi this time. Hm...new fuel pump is doing good. I turned it down, drove it to Jon at his house...and we then spent all of Sunday tuning. My car hauls ass now, im very very pleased. Times will come soon.

With regards to my transmission...i replaced the governor with the stock one...the "too long" shift problem is handled...i just somewhat wish that the TC was still electronically controlled, as now if im not at WOT it will lock up at about 45 mph. not a huge deal...just takes a little longer to downshift when i choose to go WOT.

11-15-2005, 05:23 PM	#11
IROCdan330 12 Second Club Join Date: Sep 2004 Location: Vineland Posts: 928 iTrader: (0)	update guys: After a little diag, turns out my fuel pump wasn't cutting it. replaced the fuel pump a few days after this with a walbro 255, as well as having my valve lash reset (a few valves were too tight). i put it on the dyno so i could get some wideband information for Jon (Fasterthanyou), and it turns out this time around the a/f ratio was so far off (too rich) that it went off the scope...still put 226 down at the wheels for horsepower with a 20# injector constant in the comp, and too high of fuel pressure. i checked the pressure the next day, and instead of the AFPR being bottom out at 44psi, it was well over 50 psi this time. Hm...new fuel pump is doing good. I turned it down, drove it to Jon at his house...and we then spent all of Sunday tuning. My car hauls ass now, im very very pleased. Times will come soon. With regards to my transmission...i replaced the governor with the stock one...the "too long" shift problem is handled...i just somewhat wish that the TC was still electronically controlled, as now if im not at WOT it will lock up at about 45 mph. not a huge deal...just takes a little longer to downshift when i choose to go WOT. __________________ 87 iroc with the usual go fast stuff heavier than your half ton.