SeattleJusty
No, a boxer will not fit in a Justy.
Posts: 1,587
|
Post by SeattleJusty on Jul 29, 2010 0:35:41 GMT -5
The only slight pressure drop is at the T-stat, which (is unavoidable) but has equal siced bushings on all 4 sides. There's losses everywhere, every bend, every inch of pipe... but that's not really the whole point. Nor is to tell you that oil coolers will ruin your engine, far from it. The point is to understand what happens when we cool the oil in old worn engines. What factors contribute to success and what others make the cooling function useless? Let's suppose I just redid the crankshaft & bearings in my 200,000 mile Justy. The pump is left untouched. Should I spend near 200$ and install a cooler? Would my oil pressure go up or down? Maybe I should have first asked you what you plan to achieve here. Do you want less pressure drop across the filter? Do you want cooler oil? A vertically mounted filter? Greater ambient temp range with low viscosity oil? But of course these questions beg further. Was the oil temp too hot? Was the old filter too small? Is it all worth it? Justyjuggler, those are all excellent questions. Often we get caught up in the sex appeal of a modification and don't question whether it was needed and more importantly, what else was more important that was left out (rear disc brakes anyone?). I'm not necessarily saying that is the case here but you're the first one to raise the question here.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jul 29, 2010 12:35:02 GMT -5
There's losses everywhere, every bend, every inch of pipe... but that's not really the whole point. Nor is to tell you that oil coolers will ruin your engine, far from it. The point is to understand what happens when we cool the oil in old worn engines. What factors contribute to success and what others make the cooling function useless? Let's suppose I just redid the crankshaft & bearings in my 200,000 mile Justy. The pump is left untouched. Should I spend near 200$ and install a cooler? Would my oil pressure go up or down? Maybe I should have first asked you what you plan to achieve here. Do you want less pressure drop across the filter? Do you want cooler oil? A vertically mounted filter? Greater ambient temp range with low viscosity oil? But of course these questions beg further. Was the oil temp too hot? Was the old filter too small? Is it all worth it? Justyjuggler, those are all excellent questions. Often we get caught up in the sex appeal of a modification and don't question whether it was needed and more importantly, what else was more important that was left out (rear disc brakes anyone?). I'm not necessarily saying that is the case here but you're the first one to raise the question here. Good points, all. My sole purpose for an oil filter relocation was to make oil changes easier (1) and to slightly increase oil capacity and filter surface (distant 2, more like an incidental improvement). I never planned for an oil cooler on the Justy, and I do not personally feel it's needed. I just changed the oil in my '93 DL because it's crossed 3k miles but I was in a huge rush and did not change the filter. I am very diligent about oil changes and ALWAYS do the filter at the same time but did not this time simply due to time (my car has A/C and an electronic oil pressure sender which makes the filter quite a challenge). My in-laws are here and using the Justy, so when I noticed it had reached 3k, I wanted to at least change out the oil while I had a few minutes to do so. It's actually easier for me, aside from the time it takes to pour 9 qts of Mobil1 into the engine, to change the oil and filter on my '10 Camaro SS than the Justy. I like to make things that NEED to be done as easy/simple as possible - so that they get done.
|
|
|
Post by nipper on Jul 29, 2010 14:01:23 GMT -5
So basically adding oil to a tiny engine and keeping it cool (like I said this has been on other places on the board) is considered sexy?
All this over me wanting to share my clean install, and for expanding my oil capacity. Forgive me for wanting to baby a mint justy and making sure the engine lasts a long time, that was my only goal here. Personally (and professionally) I think with NY traffic and heat the oil would be worked a little too hard for my comfort.
Have fun folks I will be here lurking onw working on my Justy. I will report back once I get the rest or the parts and the car started.
I hate waiting for one dumb fitting.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jul 29, 2010 15:09:51 GMT -5
I will report back once I get the rest or the parts and the car started. Please do. The Justy oil system frailty has been a topic of discussion for a very long time and as it turns out there does not seem to be a way to theoretically or conversationally determine the cause(s) of the issue(s) or figure out solutions. It's all rhetoric without experiment and you have put together a fine system to test "for reals". I am personally impressed by your work and interested in how it works out.
|
|
|
Post by nipper on Aug 26, 2010 16:45:43 GMT -5
An update: My back was really hurting and my hips (from a OMG you can still walk car accident 5 years ago) that i stopped working under the hood for a while, and worked on running wires and soldering and the fuel pump mount. The fuel pum was easy for my back, lie down on ground put tools within reach. Yay. I now have oil circulating through the system. The amount of oil also has been reduced on the dipstick. It is still reading a little bit over filled, but by my best guess there is now 2 extra qts in the system. I put two hoses backwards so that took a little debugging. I have just been cranking the car untill i am positive all is ok, I made a mess by having every oil line disconected at one point to make sure I had flow. The oil pressure gauge will not pickup the pressure as right now it is low at cranking speed. I am going to fig up a 0-15 psi gauge just to triple check before I start the car. I was looking closely at the Oil T-stat. I should have taken pictures. Looking closely at it, and remebering from the insturctions, in its cold position, it looks like it allows generous flow at 80 degrees (outside temp) This is supposed to always have some oil bypass the T-stat incase it fails. Seeing how this is plumbed I don't see why that is needed. I think this is more important at colder temps (they dont say at what oil temp it is fully closed). I am more worried about over cooling the oil in winter then it getting too hot. More when the car os actually started. I have to plumb the fuel pump, use the fuel pum to pull out the rest of the bad gas, and use POR-15 on all the surface rust under the car.
|
|
|
Post by nipper on Sept 26, 2010 10:01:14 GMT -5
The Justy started today. After all the exhaust work it sill sounds like a tank. It is leaking at the flange behind the flextube. That is probably my fault.
Oil pressure when cranking is 10 psi on a mechanical gauge under the hood (makes the 4ps light setting all that much scarrier). Oil pressure at 2500 RPM is 45psi (the car has no idle). With the car idleing "well what the Justy thinks is idle) oil temp reaches 190 F. The oil thermostat open at 180.
Added 2 qts of oil to system in addition to the stock amount.
|
|
|
Post by justyjuggler on Sept 27, 2010 9:14:10 GMT -5
Oil pressure when cranking is 10 psi on a mechanical gauge under the hood (makes the 4ps light setting all that much scarrier). I get good cranking pressure when oil is cold too. The switch triggers even lower @ 2.1-3.6 psi. What temp is oil at during your 2500rpm/ 45psi test? Where do you measure this pressure?
|
|
|
Post by nipper on Sept 30, 2010 22:38:50 GMT -5
I do get good oil pressure at idle, just it is very rare for the car to idle. I am ordering a rebuilt carb tomorrow.
Oil temp is running at 190F due to the high rpm and the car not moving. That was fine for my needs as it actually got oil into the cooler and the oil T-stat to open.
The switch is in the stock location off a T. The oil pressure is taken at the inlet side of the external oil filter.
|
|