turbo

[larry52vd]

need help with my turboi have a 1/4" oil line going to the turbo i need to now what size restrictor on the oil line thank you much1950 chevy

[altailites]

need help with my turboi have a 1/4" oil line going to the turbo i need to now what size restrictor on the oil line thank you much1950 chevy .040

[skipjobe]

I just went through this Corky Bell's book says 55 to 65 thousands restricter.Mine was pumping oil past the turbo I installed a .063 restricter and that issue was resolved.

[gnsrule]

Why would you put a restristrictor in the oil feed line anyway ? Never heard of anything like that b 4

[skipjobe]

I guess some turbos can't handle 60 to 80 psi it forces oil though the bearings into the boosted stream. It has solved my problem. I just hope it gets adequate oiling.
You have two GN's so I doubt I can tell you anything about turbos, I am learning all I can as I go along.

[gnsrule]

Im not a guru by any means. I just think if its blowing oil past the seals, then you would have a seal/ bearing problem. Restricting oil to anything to cure an oil leakage problem just doesnt sound right to me.
Craig

[altailites]

Im not a guru by any means. I just think if its blowing oil past the seals, then you would have a seal/ bearing problem. Restricting oil to anything to cure an oil leakage problem just doesnt sound right to me. I even drill out certain main oil passages to make sure of that.

Craig The problem is when you have a 3/8 to1/4 line with 80 to 100 psi it doesn't have enough time to drain back into the pan .when that happens oil will find its way out somewhere and most the time it goes back through the inlet tubes witch will cause detonation. Also ball bearing turbos do not need alot of oil that's why we run a .040 jet

[gnsrule]

Why not run a bigger return line? I run a dedicated feed line from the oil filter to the turbo just so I dont starve it of oil and a return line somewhere around a #8 or so.
To each his own.

Good Luck,

Craig

[altailites]

Why not run a bigger return line? I run a dedicated feed line from the oil filter to the turbo just so I dont starve it of oil and a return line somewhere around a #8 or so.
To each his own.

Good Luck,

Craig OK let me try to make it better to understand. When your crankcase goes positive like with 35 to 40 psi of boost Your gravity drained turbo doesn't return oil to the pan as well. I have always ran a .040 Jet in both my ball bearing and non ball bearing turbos and never once had any problems with my turbos .but like you said to each his own :) .

[gnsrule]

I would think if you have 35-40 lbs in the pan, then your already blowing the oil off the skirts and you have bigger problems by now. I only run 35 lbs on the topside of the pistons and never measured whats in the pan. I would only hope its way less than boost.

[altailites]

I would think if you have 35-40 lbs in the pan, then your already blowing the oil off the skirts and you have bigger problems by now. I only run 35 lbs on the topside of the pistons and never measured whats in the pan. I would only hope its way less than boost. I never said I had 35-40 lbs in the pan :roll: . do you have a data system in your car? if so whats your vac pressure before the run and at the end of the run just curious . I don't care to get into a pissing match the man asked what jet size to run in his feed line Garrett recommends a .040 jet in their bb turbos maybe he will ask others and try a .070 jet if hes scared to run a .040 but who cares I was just trying to help the man out . like you said to each his own but I can tell you this I would rather phuck up a turbo then blow oil through the inlet tubes and detonate the motor to hell :shock: and yes I have seen it happen more then once. ps the only skirt I like blowing off is my wife's :P

[ashbros]

snicker, snicker, snicker... This is getting interesting.....

[altailites]

snicker, snicker, snicker... This is getting interesting..... lol hes still trying to figure out how to work his data system :P

[gnsrule]

OK let me try to make it better to understand. When your crankcase goes positive like with 35 to 40 psi of boost Your gravity drained turbo doesn't return oil to the pan as well.

I would think if you have 35-40 lbs in the pan, then your already blowing the oil off the skirts and you have bigger problems by now.

I never said I had 35-40 lbs in the pan .

Wow,
then what did you say ?

[gnsrule]

Look,
Im not tryin to get into a "lets see whos doink" is bigger. Ive never heard of puttin in a oil restrictor to fix a leak in a turbo. Consider its spinnin in excess of 30,000 rpm, id want oil to the bearing in a major way.
Big truck turbos run 25+lbs boost all day long, whats the diff ?
If Garret said so then id like to see it.

[altailites]

OK let me try to make it better to understand. When your crankcase goes positive like with 35 to 40 psi of boost Your gravity drained turbo doesn't return oil to the pan as well.

I would think if you have 35-40 lbs in the pan, then your already blowing the oil off the skirts and you have bigger problems by now.

I never said I had 35-40 lbs in the pan .

Wow,
then what did you say ? I run 35 pounds of boost never said in the pan but when you run that much boost most the time your crank case pressure goes positive and your gravity drained turbo doesn't return oil to the pan as well

[altailites]

Look,
Im not tryin to get into a "lets see whos doink" is bigger. Ive never heard of puttin in a oil restrictor to fix a leak in a turbo. Consider its spinnin in excess of 30,000 rpm, id want oil to the bearing in a major way.
Big truck turbos run 25+lbs boost all day long, whats the diff ?
If Garret said so then id like to see it. Just so you know my turbos spinn around 90,000 rpm. :P

[altailites]

BTW this is the stock oil feed hole on my 88mm turbos so can you please send me a 1/2 inch drill bit .I want to make sure they have plenty of oil :P http://i211.photobucket.com/albums/bb129/prost63vette/100_0540.jpg