A little back story, I honestly know limited amount about turbo motors but have built quite a few big blocks. My friend asked me to build him a turbo motor two plus years ago with the understanding he would handle all the turbo electronics etc. It is a 3.8 .030 over it has mildly ported heads with a hyd. cam 270/ 280 adv. duration , .448/.472 lift @ valve. precision ball bearing turbo (62) the throttle body is a 70mm with but don't know the make. The injectors are 60 lbs. It has a turbo tweaked 5.6 chip with a upgraded 3 bar MAP and a LS MAF.
The motor was put together and all was good it made good power and clean as can be. We only got one pass when we had taken it to the track but it ran 11.50 @ 118 mph on 19 lbs of boost so lots of potential. My buddy ran the car around the house minimal amount the rest of the year and first developed a lifter tick so we figured it was a bad lifter so we changed it and not long after started to have a mis which we found out to be a dead cylinder (70% leakdown) We pulled the motor and found the cam thrust had eaten into the block and dumped cast iron through the motor so at that point we knew why the lifter had failed as well.
I took the motor apart and had the crank ground 10/10 ,new bearings , touch honed the block and fixed the cam thrust face on the block and made a bronze thrust washer for the cam etc. etc
We fired the motor last week and every thing seemed ok until you would start to bring the rpm's up it would really start pushing oil out both sides and NO BOOST. I pulled the plugs and there drenched in oil so I I did a leakdown and all the cylinders are Like 1 % leakdown. It has total seal gapless rings in it now where before it had speed pros.before.
This were I'm completely lost I pulled the dog house off and theres oil in the plunum area and evidence of oil in all runners. I then figured maybe its the pcv then cause where else is the Oil coming from so I unhooked the pcv and put it back together and no difference. If the rings were the issue could oil get pushed all the way up into the plenum area ? But again the leakdown shows that the compression rings are sealed tight as can be..
It seems to me that the two issues are tied together oiled plugs and O boost ( yes the gage works we checked that as well)
Not sure where to turn from here , I don't know anybody that is into turbo cars and Ive talked to everybody I know and I'm at a dead end . Any help would greatly be appreciated . Hopefully my explanation above is somewhat coherent to give you the jest of whats going on . Thanks and sorry for the long post.
ps it does have a data logger but something is messed up so cant give any data from that.
The motor was put together and all was good it made good power and clean as can be. We only got one pass when we had taken it to the track but it ran 11.50 @ 118 mph on 19 lbs of boost so lots of potential. My buddy ran the car around the house minimal amount the rest of the year and first developed a lifter tick so we figured it was a bad lifter so we changed it and not long after started to have a mis which we found out to be a dead cylinder (70% leakdown) We pulled the motor and found the cam thrust had eaten into the block and dumped cast iron through the motor so at that point we knew why the lifter had failed as well.
I took the motor apart and had the crank ground 10/10 ,new bearings , touch honed the block and fixed the cam thrust face on the block and made a bronze thrust washer for the cam etc. etc
We fired the motor last week and every thing seemed ok until you would start to bring the rpm's up it would really start pushing oil out both sides and NO BOOST. I pulled the plugs and there drenched in oil so I I did a leakdown and all the cylinders are Like 1 % leakdown. It has total seal gapless rings in it now where before it had speed pros.before.
This were I'm completely lost I pulled the dog house off and theres oil in the plunum area and evidence of oil in all runners. I then figured maybe its the pcv then cause where else is the Oil coming from so I unhooked the pcv and put it back together and no difference. If the rings were the issue could oil get pushed all the way up into the plenum area ? But again the leakdown shows that the compression rings are sealed tight as can be..
It seems to me that the two issues are tied together oiled plugs and O boost ( yes the gage works we checked that as well)
Not sure where to turn from here , I don't know anybody that is into turbo cars and Ive talked to everybody I know and I'm at a dead end . Any help would greatly be appreciated . Hopefully my explanation above is somewhat coherent to give you the jest of whats going on . Thanks and sorry for the long post.
ps it does have a data logger but something is messed up so cant give any data from that.
