| Update on setup |
Subject: Update on setup by dan0617 on 2012/1/25 4:00:18 Installed a dual walbro setup, fuel pressure won't go below 41 psi now. I think my large fuel cooler is the restriction. I'm going to set my base fuel pressure at 50 anyway so I should be all good. LOTS of fuel available to engine! Pulled heads (AFR 195 streets) and opened them up by removing the quench pads. They are now 71cc non-quench heads. Combustion chambers are smooth and shiny, after about 25 hours of grinding and polishing. I installed oil feed and drain lines for the future supercharger, so when the budget allows I'll be ready to bolt it on and hook it up. 60 lb injectors arrived, can't wait to get them in and tune them, if even just N/A for now. Now the bad....upon removal of the heads...I found a broken piston. About an inch or so of the top ring land was gone. The ring end was up on top of the piston. Pistons were JE forged, and the rings are ductile iron plasma moly. It must have happened during my one and only nitrous backfire about a year or so ago, but the car has been and still was running perfect. Luckily, the cylinder wall is fine, no problem at all. I dropped the pan, unbolted the rod, and pushed it out from the top. I'm now waiting on the new piston and rings to come. Bearings look good too. Very slight wear right in the middle, but nothing can be felt. That is pretty normal for a nitrous motor, so I'll likely reuse the bearings. When this is all back together and done I'm hoping to have a boosted 383 with water/meth running mid to low 10's at about 135 mph, perfecty streetable, and hit it with a 50 or 75 shot of nitrous when at the track and run bottom 10's. I'll keep you all updated now that the work is underway. |
