R.I.P A20A3-T #2
10-08-2006, 01:27 AM
#1
3.0 BAR
Thread Starter
Join Date: Jan 2003
Posts: 4,438
R.I.P A20A3-T #2
Installed my built A20A3 and got her to run but ran into MAJOR issues, the car started up and ran with great oil pressure, got the temps up, everything looked/felt great. We took it out driving, the new turbo is working pretty good, but no WOT pulls, still breaking it in, 10 ish psi Only for a sec or 2), no big rippers. We were doing 50-75 pulls on the highway in 3rd, accelerate slowly to 75 then engine brake back down, but then it started to sound funny (felt a funny vibration we thought maybe was an axle) and the oil pressure was a little less so we checked the oil, looked ok, so we started our way back and by the time we got off our exit (15 miles on the motor) it went to a full blown bad knock. So we pulled it back to the house and rolled it in but it looks/sounds very bad at this point, thinking at least 1 or 2 spun rods but we have no freaking clue as to why. If it spun a bunch of mains as well im not sure if im gonna start over at this point, i might just part it out and give up. Its gonna get pulled apart tomarrow to see WTF happend. Im pretty upset at the car right now, everything was checked and spec'd out torqued and everything was checked and rechecked. Oil pressure was always on the decent side so we really arent sure what the problem is even though everything points to bottom end DEATH. Pics coming tomarrow when i yank my oil pan. Im too pissed to work on it right now
R.I.P. A20A3 #2
R.I.P. A20A3 #2
10-08-2006, 01:33 AM
#5
1.5 BAR
Join Date: Jun 2004
Posts: 755
Re: R.I.P A20A3-T #2
Originally Posted by ZC EF 4dR
yeah ---- happens, i did a swap and forgot to add oil before it didnt even see 1 mile lol.
sorry to hear, but the good news is you get to make it bigger and better.
sorry to hear, but the good news is you get to make it bigger and better.
10-08-2006, 01:40 AM
#8
3.0 BAR
Thread Starter
Join Date: Jan 2003
Posts: 4,438
Re: R.I.P A20A3-T #2
i hope, Dave, it still had ok oil pressure but i just cant understand it. It just felt funny and had that vibration that turned into a full blown knock more or less pretty quickly, pretty loud, ive had spun bearings before but this is at least 3x louder than your avg spun bearing. I think it might have somthing to do with the crank scraper, Im thinking if it was just that then it wouldnt have messed with my oil pressure pretty much at all. These are used good condition crower I beam rods on a polished crank and chamfered oil holes, bearings spec'd out well within tolerance and a hi vol oil pump, diamond forged pistons, everything was assembly lubed, got 60psi at 1500 rpm when cold on startup! I tried cranking it around by hand and it was HARD even with the plugs out of it after i got it home. I have a feeling either the crank scraper got sucked up into the crank or somthing or the rods are somehow seriously damaged.
10-08-2006, 02:01 AM
#9
3.0 BAR
Join Date: Jul 2004
Posts: 4,029
Re: R.I.P A20A3-T #2
Keep at it you will recover.Sorry to hear that but being a car guy its 25% utter failure and disapointement,%50 hard work and scrounging and then the 25% that is the enjoyment that comes when it all finally comes together 
