Twin Turbo 358

well, it looks like i'm going to have to take my passenger side turbo off and have a turbo shop rebuild it. i think the oil ring in it has gone bad--i'm getting smoke out of the passenger side exhaust. since it did this before the engine rebuild, i know it's coming from the turbo. also, my piston rings have had plenty of time to seat. hopefully this won't keep me down too long--just gotta decide whether to find a local turbo-diesel shop (?) or to send the turbo to Turbo City, etc. anyone know how much i'm looking at if they just need to replace an oil ring?

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Jeff
99 T/A WS6 A4, RKSport lid & free EGR mod
88 GTA twin turbo 358, forged crank, forged H-beam rods, Wiseco reverse dome pistons, Dart Sportsman II 72cc heads, Comp Cams custom grind blower cam (.560/.586 lift, 232/236 duration), 1.6 roller rockers, TPIS mini ram intake manifold w/ Accel 58mm TB, 83 lb injectors, Accel DFI computer with variable injector controller, 2 Garrett T04B "hair dryers" with dual Garrett wastegates, TH400 tranny with BTE transbrake and Art Carr custom converter, F*rd 9 inch rear w/ 3.50 gears, and more...

GMI FAST

Hmmm... Check your oil drain return line. Biggest problem is backed up oil that can't drain properly. It can't go anywhere except back through the turbo. Cross your fingers, dude!

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Old: 1989 Formula, 383", DFI, built 700R4, TFS heads, Mini-Ram, Vortech S-trim 15 psi, 3.70 gears
Best ET: 10.796 @ 125.8 mph

New: 1989 T/A, 406", Accel Pro-Ram, DFI, AFR heads, HRC Turbosystem, NOS 150-hp dry kit, TH400 w/GV overdrive, 9" w/3.70 gears, 8-pt. S&W rollbar, 18" wheels
Best ET: Spring 2001

Employed at:
Hahn Racecraft
Accel EMIC/DFI Tuning
Turbosystems & Custom EFI

Member of Midwest F-Body Association www.mfba.org

Twin Turbo 358

hmmm... thanks for the input! i'll check that... i don't know exactly what can go wrong with the drain though. i've got bungs on each side of the oil pan, at the same height. only my passenger side turbo is smoking. could i run the drain line over to the other side (driver's side) in an attempt to narrow down the problem?

thanks!

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Jeff
99 T/A WS6 A4, RKSport lid & free EGR mod
88 GTA twin turbo 358, forged crank, forged H-beam rods, Wiseco reverse dome pistons, Dart Sportsman II 72cc heads, Comp Cams custom grind blower cam (.560/.586 lift, 232/236 duration), 1.6 roller rockers, TPIS mini ram intake manifold w/ Accel 58mm TB, 83 lb injectors, Accel DFI computer with variable injector controller, 2 Garrett T04B "hair dryers" with dual Garrett wastegates, TH400 tranny with BTE transbrake and Art Carr custom converter, F*rd 9 inch rear w/ 3.50 gears, and more...

Jester

Don't your turbos join together before the throttle body? IF so, then one bad turbo would cause smoking out of both exausts. Smoking out of only one side would be an engine problem. I don't remember your setup that well..so I could be wrong.

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

Twin Turbo 358

Jester, the turbos aren't plumbed into the throttle body right now. they are just mounted on the exhaust and the oil lines are hooked up. my old intake tubes won't fit any more since i changed intake manifolds (went from TPI to miniram).

but i'm 99% sure that it's not an engine problem. the smoking was present before i did the engine rebuild and now after putting the new engine in, it's still there (on the same side). i really think it's the oil ring inside the turbo, or as GMI mentioned, it could be an oil drainage problem on the return line. i'll check out the return lines and if necessary swap turbos to see if the smoking switches to the other side...

thanks!


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Jeff
99 T/A WS6 A4, RKSport lid & free EGR mod
88 GTA twin turbo 358, forged crank, forged H-beam rods, Wiseco reverse dome pistons, Dart Sportsman II 72cc heads, Comp Cams custom grind blower cam (.560/.586 lift, 232/236 duration), 1.6 roller rockers, TPIS mini ram intake manifold w/ Accel 58mm TB, 83 lb injectors, Accel DFI computer with variable injector controller, 2 Garrett T04B "hair dryers" with dual Garrett wastegates, TH400 tranny with BTE transbrake and Art Carr custom converter, F*rd 9 inch rear w/ 3.50 gears, and more...

GMI FAST

Uh, Jester, each turbo has it's own exhaust port. If he has true dual exhaust, then it could smoke out of one pipe...

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Old: 1989 Formula, 383", DFI, built 700R4, TFS heads, Mini-Ram, Vortech S-trim 15 psi, 3.70 gears
Best ET: 10.796 @ 125.8 mph

New: 1989 T/A, 406", Accel Pro-Ram, DFI, AFR heads, HRC Turbosystem, NOS 150-hp dry kit, TH400 w/GV overdrive, 9" w/3.70 gears, 8-pt. S&W rollbar, 18" wheels
Best ET: Spring 2001

Employed at:
Hahn Racecraft
Accel EMIC/DFI Tuning
Turbosystems & Custom EFI

Member of Midwest F-Body Association www.mfba.org

Twin Turbo 358

GMI, you are correct--true dual exhaust. i'll keep everyone posted on what i find.

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Jeff
99 T/A WS6 A4, RKSport lid & free EGR mod
88 GTA twin turbo 358, forged crank, forged H-beam rods, Wiseco reverse dome pistons, Dart Sportsman II 72cc heads, Comp Cams custom grind blower cam (.560/.586 lift, 232/236 duration), 1.6 roller rockers, TPIS mini ram intake manifold w/ Accel 58mm TB, 83 lb injectors, Accel DFI computer with variable injector controller, 2 Garrett T04B "hair dryers" with dual Garrett wastegates, TH400 tranny with BTE transbrake and Art Carr custom converter, F*rd 9 inch rear w/ 3.50 gears, and more...

20-psi

I am having my turbo rebuilt now and I was told that it might cost me $400.00. It is being donw thru a friend who owns me. He sent it to Turbonetics and they are enlarging both sides and some other custom stuff.

You can rebuild one yourself if you are good mechanically and like doing that stuff. The kit you need is not that expensive. Call those places and get quotes from them.

I believe Applied Technologies is down in Sout Carolina. If you need a number I will look it up for you tomorrow.

Pete

GMI FAST

Twin Turbo 358: Please, please, please tell me you were a good boy and rerouted your oil feed line like I told you! That would have huffed the passenger turbo in 2 minutes flat.

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Old: 1989 Formula, 383", DFI, built 700R4, TFS heads, Mini-Ram, Vortech S-trim 15 psi, 3.70 gears
Best ET: 10.796 @ 125.8 mph

New: 1989 T/A, 406" Bow-Tie NASCAR Tall-Deck, Accel Pro-Ram, DFI, AFR heads, HRC T76 Turbo, NOS 150-hp dry kit, TH400 w/GV overdrive, 12-bolt w/3.70 gears, 8-pt. S&W rollbar, Spohn suspension, 18" wheels, Baer brakes
Best ET: Spring 2001

Employed at:
Hahn Racecraft
Accel EMIC/DFI Tuning
Turbosystems & Custom EFI

Member of Midwest F-Body Association www.mfba.org

Twin Turbo 358

GMI, no i haven't changed the oil lines yet, but i assure you it's on the list! the engine was run (before the rebuild) for 13k miles, and the smoking didn't start until just before i tore it down to do the rebuild.

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Jeff
99 T/A WS6 A4, RKSport lid & free EGR mod
88 GTA twin turbo 358, forged crank, forged H-beam rods, Wiseco reverse dome pistons, Dart Sportsman II 72cc heads, Comp Cams custom grind blower cam (.560/.586 lift, 232/236 duration), 1.6 roller rockers, TPIS mini ram intake manifold w/ Accel 58mm TB, 83 lb injectors, Accel DFI computer with variable injector controller, 2 Garrett T04B "hair dryers" with dual Garrett wastegates, TH400 tranny with BTE transbrake and Art Carr custom converter, F*rd 9 inch rear w/ 3.50 gears, and more...