CH3NO2
Senior Member
Joined: March 2017
Posts: 455
|
Post by CH3NO2 on Aug 29, 2017 8:25:45 GMT -5
Hi Guys,
I have a general question on oil lines again.
Does the requirement for low pressure drop at the turbo oil outlet preclude the use of any oil cooler/heat exchanger on the turbo outlet line? Does it mean the heat exchanger should be placed in the pickup line of the pump?
Thanks, Tony
|
|
|
Post by Johansson on Aug 29, 2017 13:23:33 GMT -5
I´d place it between the pump and the turbo rather than having it between tank and pump since the oil pump is much better at pushing oil than sucking it.
Or even better have a separate cooler pump that circulates oil from the tank through a cooler and back to the tank. It´d complicate the plumbing a bit though.
|
|
|
Post by racket on Aug 29, 2017 17:22:49 GMT -5
With decent sized plumbing to and from the oil cooler there shouldn't be any problems . Try and use a cooler with inbuilt thermostatic bypass to get the oil up to temperature quicker , or have a thermostatically controlled fan on a non bypass cooler . The oil cooler I used on my 2 shaft kart jetandturbineowners.proboards.com/attachment/download/45 didn't have either, but still seemed to do its job , it was installed with a bit of backwards lean to promote some airflow when stationary .
|
|
CH3NO2
Senior Member
Joined: March 2017
Posts: 455
|
Post by CH3NO2 on Aug 29, 2017 19:36:29 GMT -5
Thank you^2!
|
|
|
Post by smithy1 on Aug 29, 2017 19:50:49 GMT -5
Yep...what John said....I've also installed a cooler between pump/filter and turbo oil inlet, works fine. As long as the plumbing size is adequate for the flow, you won't have an issue.
Cheers, Smithy.
|
|
CH3NO2
Senior Member
Joined: March 2017
Posts: 455
|
Post by CH3NO2 on Aug 29, 2017 20:00:58 GMT -5
Is 10AN to 5/8" hose sufficient if the total hose length is kept under 1M?
Tank, to pick up line, to pump, to heat exchanger, to filter, to turbo?
THX!
|
|
|
Post by racket on Aug 29, 2017 22:53:48 GMT -5
Hi Tony
LOL...........I don't know what AN size 1/2" household annealed copper pipe is , thats all I use for my supply lines , generally 3/4" copper for the suction between tank and pump .
Cheers John
|
|
BFTO
Veteran Member
Joined: February 2016
Posts: 128
|
Post by BFTO on Aug 30, 2017 1:51:58 GMT -5
AN10 is 5/8" OD hose, thats more than enough for the oil supply.
|
|
|
Post by Johansson on Aug 30, 2017 2:32:48 GMT -5
I run AN6 for my oil line, works just fine. Just think of how small the total oil channel area inside the turbo is, there is no need to go to the extremes.
Just make sure you have the oil pressure sensor between filter and turbo so you are reading the pressure the turbo is getting and not what the pump is supplying, a clogged filter or any other restriction in the oil system won´t be spotted otherwise before the bearings wear out.
|
|
Chuks
Senior Member
Joined: August 2015
Posts: 498
|
Post by Chuks on Oct 12, 2017 8:26:49 GMT -5
hi John, please can you provide some detailed dimensions of the 4th stage allison C20 wheel with its ngv? or can anybody post the cad model?
CAD has been been my best friend since someone like me cant reach the real stuffs easily. if anybody needs the CAD model of a TV94 turbine wheel to play with, I will be more than willing to share. thanks all.
|
|
|
Post by racket on Oct 12, 2017 16:26:59 GMT -5
Hi Chuksy
LOL...........CAD .....I'm still in the pencil and paper age :-)
The wheel is ~212 mm overall dia at the tip labyrinth seal , blade inlet 200mm tip, 113.5 root , out its 205mm tip and 113.5 mm root , exit blade angle ~20+ degrees tip , 25-30 degrees mid and 40+ degrees root , flow area out is ~15 square inches .
Ngv has 28-30 degree tip and ~20 degrees root,tip dia ~198 mm root 114mm
Cheers John
|
|
Chuks
Senior Member
Joined: August 2015
Posts: 498
|
Post by Chuks on Oct 14, 2017 17:16:00 GMT -5
thanks John,
have made a dummy CAD model for practice,
LOL......I still know you will do greater things when there is a good reasons to venture into CAD world.
Cheers Chuks
|
|
|
Post by racket on Oct 14, 2017 19:58:20 GMT -5
Hi Chuks
LOL...............I should live so long ;-)
Cheers John
|
|
Chuks
Senior Member
Joined: August 2015
Posts: 498
|
Post by Chuks on Nov 9, 2017 21:39:01 GMT -5
|
|
Chuks
Senior Member
Joined: August 2015
Posts: 498
|
Post by Chuks on Nov 9, 2017 21:46:02 GMT -5
I took my time to study his bearing set up and its just amazing. not sure if that will in an engine with 107mm comp inducer were there will be a greater axial force vs EGT. www.youtube.com/watch?v=QIjQGvDhCaQ&t=33s
|
|