draw through turbo white smoke

Splitdog · Posted: Thu Jul 05, 2012 5:42 pm Post subject:

Carbon seal. Turbo.
_________________
CH3NO2.

Der Blitzkrieg Kafers

SamT · Posted: Thu Jul 05, 2012 8:16 pm Post subject:

How can 2 different new turbos have the same issue? They were ran just a few minutes each before I put the larger return line on.

rs58rag · Posted: Thu Jul 05, 2012 9:43 pm Post subject:

You say the turbo is dumping oil into the intake. I doubt the pressure side of turbo is the cause, but pull housing and check. Most likely worn valve guides or maybe the intake port bumps were ground down when heads were ported and have lil pinhole.

SamT · Posted: Fri Jul 06, 2012 4:26 am Post subject:

Im finding the oil when I pull the hose off the turbo itself, could oil get all the way up there if it is from the engine?

TURBOEDVW · Samba Member Joined: July 13, 2004 Posts: 161

Can you post pictures of the set up and turbo?

TURBOEDVW · Samba Member Joined: July 13, 2004 Posts: 161

Also since its a buggy, does it have low gears? My buggy doesn't build boost in first or second on the street either. I have a 4.86 r&p and it weights around 1000 lbs.

hotrod100 · Posted: Fri Jul 06, 2012 12:09 pm Post subject:

Are you sure this is a carbon seal turbo and not a blow through only one.
_________________
My build thread http://www.thesamba.com/vw/forum/viewtopic.php?t=482400

SamT · Posted: Fri Jul 06, 2012 1:09 pm Post subject:

I left town for the weekend, will get pics when I get back.
Yea Buggy is low geared, 091 trans.

First turbo leaked out both sides, second is only dumping oil on pressure side. Both are carbon sealed.

modok · Posted: Fri Jul 06, 2012 4:38 pm Post subject:

Are they new garret? rebuilt? or china brand?

I'm just curious

Sharig1979 · Posted: Fri Jul 06, 2012 5:08 pm Post subject:

Were the turbos the same size and brand? Nothing else was changed?

I'll be doing some reading related to another build and while I'm reading I'll keep my eyes open for something related to your symptoms.
_________________
1969 Beetle, turbo 1915
~118 mph on the salt at WoS 2012, 7k in 3rd, can't wait to figure out how to drive that engine on that stuff.
1972 914/4, 1.7
1991 GTI 1.8 8v, 4speed

SamT · Posted: Fri Jul 06, 2012 6:36 pm Post subject:

The first was a turbonetics something like that. Second is from
cbperformance. I know forsure the cb one is carbonsealed, the first was supposto be. Both were new.

miniman82 · Posted: Sat Jul 07, 2012 10:14 am Post subject:

Sorry, but if it's not a restricted drain the turbo is bad. Carbon seals will keep positively all oil out of the compressor, unless they are bad. Time for a new turbo. I could build you a Rajay that won't leak no matter how much pressure you put to it, just let me know.
_________________
Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

SamT · Posted: Mon Jul 09, 2012 8:04 pm Post subject:

Here is a few pics for those interested.

Image may have been reduced in size. Click image to view fullscreen.

SamT · Posted: Mon Jul 09, 2012 8:07 pm Post subject:

One more.

miniman82 · Posted: Mon Jul 09, 2012 8:25 pm Post subject:

Sweet, it's even got the same round 4-bolt dump pipe my turbo has. The one I would sell you is a direct bolt-in replacement. You need to contact your customer and find out exactly how he intends to drive this, as that will dictate how I build it.
_________________
Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

SamT · Posted: Mon Jul 09, 2012 8:34 pm Post subject:

Im waiting on customer and cb to sort out this turbo. I told him I have a line on more appropriate turbo for it.

See anything wrong with this setup? Would running the turbo with a 3/8 return for 5 min or so blow out the seals? Return is 1/2 with fittings drilled out some now.

miniman82 · Posted: Mon Jul 09, 2012 11:24 pm Post subject:

Depends what type of carbon seal it has in it, there are 2 types. Encapsulated, and 4-piece. One is weaker than the other in my experience, so if the unreliable one was used it's entirely possible the backed up drain made it buy the farm. I prefer the 4 piece seal, because it's 'rebuildable' to a certain degree. Same style one Rajay uses. With the encapsulated seal you can't replace the o-ring that's inside it, so if it gets old and brittle you have to replace the entire thing. With 4-piece, you are able to replace the o-ring, and 9 times out of 10 the carbon face of the seal is ready for another 100,000 miles. Also the actual carbon part of the seal tends to be thicker (or wider anyway) on the 4 piece one, so it takes abuse a lot better. Early models of Rajay were steel backed, where later ones were not. Same rules apply, if you're gonna be harsh to it you want the steel backed one.
_________________
Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

stringtwelve · Posted: Wed Jul 25, 2012 12:53 pm Post subject:

Any update on this issue? I also have a 2332cc with a draw through Quick Fuel 750cfm carb and a Garrett T04E turbo that has the same issue.
My plugs are nasty looking and there's some oil dripping out of the vertical silicone boot that attaches to my intake.

I'm going to pull my intake and outlet hoses for the turbo tonight and see what size they are. The Garrett was supposed to be brand new when I bought the engine so I'm hoping that's not the issue...

A/F Gauge says I'm running rich at idle (10-11), decent at cruising speeds (12-14) and goes way lean when I mash on it or hit high RPMS (17+).
_________________
'60 Beetle
'64 Beetle
'71 Super Beetle
'73 Super Beetle

p912s · Posted: Fri Jul 27, 2012 1:41 pm Post subject:

Reading back thru this thread, you said "it appears to have a restrictor", is there a restrictor in the oil feed line? Without a restrictor you're pushing a lot of oil up there. If I remember correctly when we made the restrictor for our line it's only 3/64”.

Also, looking at the pics you posted, I’d move the oil feed line so it’s not laying on the turbo housing. You’re pre-heating hot oil…

And, you said “They were ran just a few minutes each before I put the larger return line on”. This doesn’t mean you ran them without the oil feed and return lines connected; did you?
_________________
Harig Land Speed Racing - http://www.turbokafer.com
'69 Beetle, turbo 1915
'67 912, 1720 w/Dell's; 1911 T4 under construction

>Help >Donate >Buy Shirts >Register >Log in	See all Samba banner ads \| Advertise on TheSamba.com

draw through turbo white smoke
Goto page Previous 1, 2, 3

Forum Index -> Performance - Engines/Transmissions		Share:
		Print View

	Forum Index -> Performance - Engines/Transmissions	All times are Mountain Standard Time/Pacific Daylight Savings Time Goto page Previous 1, 2, 3
Page 3 of 3