New turbo and smoke
Thread Starter
Joined: Jun 2003
Posts: 651
Likes: 6
From: NEW YORK INTERNATIONAL RACEWAY PARK
New turbo and smoke I just installed V1 Huron kit on my car with VS racing 7875 turbo. Is it normal for the down pipe to smoke like a SOB? Its coming out of the wrap and I have some chugging smoke out of the tail pipe about 5 minutes of run time. If this isn't normal(what's normal) burn off how do i trouble shoot this? Smoke is all bluish so its oil.
Feed pressure to high, stock pump with out a restriction recommended by VS racing
Not draining properly -10AN level is level ish to the pan
Bad turbo
Any other possible causes for excessive smoke, crank case pressure at idle would this even be possible?
its my first time so excuse my ignorance
Feed pressure to high, stock pump with out a restriction recommended by VS racing
Not draining properly -10AN level is level ish to the pan
Bad turbo
Any other possible causes for excessive smoke, crank case pressure at idle would this even be possible?
its my first time so excuse my ignorance
Thread Starter
Joined: Jun 2003
Posts: 651
Likes: 6
From: NEW YORK INTERNATIONAL RACEWAY PARK
in oil pan where the kit recommended it
https://huronspeed.com/wp-content/up...tall-Guide.pdf page 2 of that guide
https://huronspeed.com/wp-content/up...tall-Guide.pdf page 2 of that guide
Thread Starter
Joined: Jun 2003
Posts: 651
Likes: 6
From: NEW YORK INTERNATIONAL RACEWAY PARK
All the smoke burned off of the down pipe and normal smoke is coming out of the exhaust. It did turn out to be a blessing in disguise, I had the wastegate plumbed wrong, I had boost/vacuum going to the top rather than the side, it I took it down the road it would have held it shut. I have couple small things to clean up then Ill see how it is on the road.
The drain line in the kit was way to long I tried to loop it in front of the turbo but it wasn't that long. The line is looped at the pan its parallel with the ground but the elbow points to the rear of the car and does 180 turn then back to the front where the turbo is. Again I'm new with turbo's is this just a dumb way of doing this?
I have about 6 weeks to work the bugs out of this before I tear it down and redo the motor for more boost, I'm going to run 5lbs for the fall season.
The drain line in the kit was way to long I tried to loop it in front of the turbo but it wasn't that long. The line is looped at the pan its parallel with the ground but the elbow points to the rear of the car and does 180 turn then back to the front where the turbo is. Again I'm new with turbo's is this just a dumb way of doing this?
I have about 6 weeks to work the bugs out of this before I tear it down and redo the motor for more boost, I'm going to run 5lbs for the fall season.
Thread Starter
Joined: Jun 2003
Posts: 651
Likes: 6
From: NEW YORK INTERNATIONAL RACEWAY PARK
This is something I really don't understand. I get that I wouldn't want to drain the oil up hill to the valve cover or something. Why wouldn't the oil drain to the pain if I have a feed line with 20-60PSI pushing oil into the turbo? The pressure should push the oil through the line.
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Joined: Jan 2009
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From: Bostwick, GA.
Why wouldn't the oil drain to the pain if I have a feed line with 20-60PSI pushing oil into the turbo? The pressure should push the oil through the line.
1. Pressure drop thru the brg hsg...You have no where near 60psi after the turbo.
2. Do a bit of reading... Drain lines are not "looped".
1. Pressure drop thru the brg hsg...You have no where near 60psi after the turbo.
2. Do a bit of reading... Drain lines are not "looped".
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TECH Regular
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This is something I really don't understand. I get that I wouldn't want to drain the oil up hill to the valve cover or something. Why wouldn't the oil drain to the pain if I have a feed line with 20-60PSI pushing oil into the turbo? The pressure should push the oil through the line.
A 24+ inch oil return line probably needs to have the turbo side on that hose at lease 3" higher than the oil pan side with 0 slack in the line. It's preferred to have greater than 45 degrees of slope back to the engine...
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TECH Enthusiast
Joined: Mar 2013
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This is something I really don't understand. I get that I wouldn't want to drain the oil up hill to the valve cover or something. Why wouldn't the oil drain to the pain if I have a feed line with 20-60PSI pushing oil into the turbo? The pressure should push the oil through the line.
TECH Addict
Joined: Oct 2016
Posts: 2,513
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From: PDX-OR-USA
Oil coming out of the bearing is usually FOAM when the turbo is at speed. I build a glass face viewing box once to see, and to prove to a car owner he was a nitwit.. 
he was trying to use the same size line in and out.. (-4)
The drain tube is the "settling" can or windage control for the drain back.
-10 IMHO is marginal.. I use -12 and like mentioned above NO horizontal or uphill of any amount.. On a big power setup I have had to use -15 and dedicated a scavenge stage from the dry sump to the two turbos.
Also if you run it much that way you will thrash the bearing. The bearing is deathly dependent on the oil blowing though it to cool.
Need for the restrictor is not a automatic yes or no decision, it depends on oil volume being fed to the turbo, so your engine build, oil pump, oil pressure , all play in to it.
And the restrictors come in sizes for a reason...
I'm not a "turbo guy" at all but I've worked on a ton of cars with them at the track and your finding the like #1 issue I've seen that cause turbo issues, poor drain and over oiling.
BTW I do road race and Sprint cars.. Not much drag race experience..
he was trying to use the same size line in and out.. (-4)The drain tube is the "settling" can or windage control for the drain back.
-10 IMHO is marginal.. I use -12 and like mentioned above NO horizontal or uphill of any amount.. On a big power setup I have had to use -15 and dedicated a scavenge stage from the dry sump to the two turbos.
Also if you run it much that way you will thrash the bearing. The bearing is deathly dependent on the oil blowing though it to cool.
Need for the restrictor is not a automatic yes or no decision, it depends on oil volume being fed to the turbo, so your engine build, oil pump, oil pressure , all play in to it.
And the restrictors come in sizes for a reason...
I'm not a "turbo guy" at all but I've worked on a ton of cars with them at the track and your finding the like #1 issue I've seen that cause turbo issues, poor drain and over oiling.
BTW I do road race and Sprint cars.. Not much drag race experience..
Oil coming out of the bearing is usually FOAM when the turbo is at speed. I build a glass face viewing box once to see, and to prove to a car owner he was a nitwit.. he was trying to use the same size line in and out.. (-4)
The drain tube is the "settling" can or windage control for the drain back.
-10 IMHO is marginal.. I use -12 and like mentioned above NO horizontal or uphill of any amount.. On a big power setup I have had to use -15 and dedicated a scavenge stage from the dry sump to the two turbos.
Also if you run it much that way you will thrash the bearing. The bearing is deathly dependent on the oil blowing though it to cool.
Need for the restrictor is not a automatic yes or no decision, it depends on oil volume being fed to the turbo, so your engine build, oil pump, oil pressure , all play in to it.
And the restrictors come in sizes for a reason...
I'm not a "turbo guy" at all but I've worked on a ton of cars with them at the track and your finding the like #1 issue I've seen that cause turbo issues, poor drain and over oiling.
BTW I do road race and Sprint cars.. Not much drag race experience..
he was trying to use the same size line in and out.. (-4)The drain tube is the "settling" can or windage control for the drain back.
-10 IMHO is marginal.. I use -12 and like mentioned above NO horizontal or uphill of any amount.. On a big power setup I have had to use -15 and dedicated a scavenge stage from the dry sump to the two turbos.
Also if you run it much that way you will thrash the bearing. The bearing is deathly dependent on the oil blowing though it to cool.
Need for the restrictor is not a automatic yes or no decision, it depends on oil volume being fed to the turbo, so your engine build, oil pump, oil pressure , all play in to it.
And the restrictors come in sizes for a reason...
I'm not a "turbo guy" at all but I've worked on a ton of cars with them at the track and your finding the like #1 issue I've seen that cause turbo issues, poor drain and over oiling.
BTW I do road race and Sprint cars.. Not much drag race experience..
TECH Addict
Joined: Oct 2016
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From: PDX-OR-USA
Yea it started to get rowdy at about 2500 on a Nissan CA18 turbo (tiny little thing.. 
)
I also installed some high temp yellow pex just for dyno run so we could watch on a bigger engine, once we got the motor warm it was pretty easy to see the bubbles build up.
In 3/4 pex they calmed quickly in 1/2 inch they kinda turned in to a mass and youd see it start backing up oil on top of the foam.
Temperature played in a lot. once your over 180 ..
We also tried some of the DOXES GM oil and it does what they say very little foam.
)I also installed some high temp yellow pex just for dyno run so we could watch on a bigger engine, once we got the motor warm it was pretty easy to see the bubbles build up.
In 3/4 pex they calmed quickly in 1/2 inch they kinda turned in to a mass and youd see it start backing up oil on top of the foam.
Temperature played in a lot. once your over 180 ..
We also tried some of the DOXES GM oil and it does what they say very little foam.
Thread Starter
Joined: Jun 2003
Posts: 651
Likes: 6
From: NEW YORK INTERNATIONAL RACEWAY PARK
I removed the drain line and cut it to the correct length. I'm hoping later today I can finish a couple little things and get it down the road for a test drive it. Thank you for the help.
TECH Regular
Joined: Mar 2015
Posts: 487
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Good way to see if its a drain issue is to remove it from the equation. Plug the pan and drain the turbo right into a bucket. If its smoking all the time and you start it in that configuration and it doesn't, you have drain issues. If it still smokes with an unrestricted drain you have other issues.
I have seen several cars with low mount turbos and horizontal drains with no smoking. V8 Lotus Esprits drain 90 degrees right off the turbo into the pan, no scavenge setup, with no smoking. Im not saying it will always work like that but it can be done.
I have seen several cars with low mount turbos and horizontal drains with no smoking. V8 Lotus Esprits drain 90 degrees right off the turbo into the pan, no scavenge setup, with no smoking. Im not saying it will always work like that but it can be done.
