81 fairmont -new project LSX turbo
08-08-2018, 11:44 PM
#125
I went to the track and I kept blowing off intercooler pipes. I’m going to need to find a solution. The angles of some of the pipes are less than desirable. I’m going to have my buddy weld up some more of the joints that keep blowing so she’ll hold more boost.
on a side note I’ve taken the car on a 800 mile road trip last week. It did great and didn’t skip a beat !
on a side note I’ve taken the car on a 800 mile road trip last week. It did great and didn’t skip a beat !
10-12-2018, 07:46 PM
#128
Well I was on my way to the track today. I made a couple of long pulls on my way. The car started overheating and then motor locked up. looks like I blew a head gasket (15lbs) on the 7875. It was running like an absolute animal.
Gen 4 4.8 will be swapped in soon. I may also have circle D loosen up my converter as it’s having trouble coming out of the hole.
Gen 4 4.8 will be swapped in soon. I may also have circle D loosen up my converter as it’s having trouble coming out of the hole.
10-12-2018, 08:10 PM
#129
damn dude sorry to hear it
how are you launching it? when i had the 4.8 7875 combo it REALLY liked the revs.
I'd footbrake it about 3/4 throttle with the sloppy brake engaged, bump the second light. dump the sloppy brake on the first bulb and mat it.
you have to enable PE mode at like 50% throttle though
also helps to keep some timing in it until positive pressure. spark map looks like a cliff in 3D but it works really good.
how are you launching it? when i had the 4.8 7875 combo it REALLY liked the revs.
I'd footbrake it about 3/4 throttle with the sloppy brake engaged, bump the second light. dump the sloppy brake on the first bulb and mat it.
you have to enable PE mode at like 50% throttle though
also helps to keep some timing in it until positive pressure. spark map looks like a cliff in 3D but it works really good.
10-14-2018, 10:56 AM
#130
damn dude sorry to hear it
how are you launching it? when i had the 4.8 7875 combo it REALLY liked the revs.
I'd footbrake it about 3/4 throttle with the sloppy brake engaged, bump the second light. dump the sloppy brake on the first bulb and mat it.
you have to enable PE mode at like 50% throttle though
also helps to keep some timing in it until positive pressure. spark map looks like a cliff in 3D but it works really good.
how are you launching it? when i had the 4.8 7875 combo it REALLY liked the revs.
I'd footbrake it about 3/4 throttle with the sloppy brake engaged, bump the second light. dump the sloppy brake on the first bulb and mat it.
you have to enable PE mode at like 50% throttle though
also helps to keep some timing in it until positive pressure. spark map looks like a cliff in 3D but it works really good.
Theres some metal shavings in the oil. And the damn thing Locked up pretty hard all of a suden. I’m concerned I may have also damaged the turbo. I guess my only option is to pump some oil in there and spin it a bit. If anyone has any suggestions for that thanks !
10-14-2018, 11:13 AM
#131
when I killed a 4.8 by overheating (lost the WP belt) it spun a cab bearing and plugged the filter with glitter causing the filter to bypass a lot of debris and feed it direct to the turbo.
I ran a bunch of kerosene though it and it seemed okay. No more noticeable shaft play than usual. No smoke.
I gave that turbo to a friend and it immediately started spewing oil into the exhaust and intake.
Thats just one data point though.
I will say viren from VSR sold me a complete CHRA for it $289 shipped. He has them in stock, both the cast and billet wheels (which do not interchange as the compressor cover has a different contour where it meets the inducer.
I ran a bunch of kerosene though it and it seemed okay. No more noticeable shaft play than usual. No smoke.
I gave that turbo to a friend and it immediately started spewing oil into the exhaust and intake.
Thats just one data point though.
I will say viren from VSR sold me a complete CHRA for it $289 shipped. He has them in stock, both the cast and billet wheels (which do not interchange as the compressor cover has a different contour where it meets the inducer.
10-16-2018, 11:25 AM
#134
10-21-2018, 09:53 PM
#136
Truckdoug: I think I’m going to go with another sloppy stage 2 it works great and I really just can’t justify the added expense of lil John Motorsports stage 2 turbo cam.
Well we we pulled the motor and did some inspection. This thing was overheated like hell. You can tell by the heat bands on the cam and crank. I think it was a low oil pressure that took out the main bearings.
Well we we pulled the motor and did some inspection. This thing was overheated like hell. You can tell by the heat bands on the cam and crank. I think it was a low oil pressure that took out the main bearings.
10-22-2018, 10:17 AM
#138
the 4.8 will make it's return BACK to the junkyard! haha
you can see the heat warping on the crank. The motor got crazy hot before it locked up. Unfortunately I don't have a temp or oil pressure gauge.
see bearings peaking out....
01-04-2019, 12:33 PM
#140
Guys could this have been the cause of the catastrophic failure ? I have 2 o rings on my ls1 fbody pickup
maybe I left the original o-ring on? And also installed the new one by mistake ?
