EVO All Evo Model Discussion

Pro Just 2 Oil Pressure Adjuster

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Old Sep 25, 2010 | 06:49 AM
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Default Pro Just 2 Oil Pressure Adjuster

Anyone using the Pro Just 2 oil pressure adjuster?

Is this a worthwhile mod for an Evo?

http://www.ertproducts.com/E.R.T._PRODUCTS.html
 
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Old Sep 25, 2010 | 09:25 AM
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Looks like a good idea.
 
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Old Sep 25, 2010 | 09:34 AM
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I have the E.R.T. oil pressure gage. Its so much better than the crappy Drag Specialties or V-Twin units. Not only does the ERT actually last, it accurately reads really low pressure even when the bike gets smoking hot. Something the other gages simply don't do well. I have never used their pressure adjuster, but if the quality is as good as their gages, I think its worth buying.
 
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Old Sep 25, 2010 | 09:53 AM
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The stock oil system on an Evo engine works fine.

Evo engines have no problems with oil pressure. The stock pump puts out all the oil flow and pressure the engine needs.

If your oil pressure is too low at idle, one of these adjusters won`t do a thing for you, because the pump is already putting out all the oil it can put out.

If you have low oil pressure problems, it is caused by a worn oil pump, excess clearance on the lifters/lifter blocks, or excess clearance at the rocker shaft/rocker bushings.

These things, and oil pressure gauges, are just doodads to hang on the bike.

The aftermarket is full of stuff you do not need, this is one of those products.

I will admit, their oil pressure gauges are great looking units, and would look cool on an Evo engine...
 
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Old Sep 25, 2010 | 12:01 PM
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Splash oiling system at idle in the crank area isn't a good oiling system, it lives with Briggs and Straton technology in stock form. Major mods, aggressive lobed cams that abuse lifters can benefit from a little more pressure, is this product helpful for someone who wants a little more oil pressure on a 102 degree day, it can help.

I'll bet S&S, Ultima don't operate at the edge of light flickering and factor in wear for oil pressure specificatons, Lost a lower bearing at 38,000 miles in a stock Evo and still have that sound burned in my memory and with all oil systems being controled by check valves (or they blow oil filters off) so I will have to disagree on the Harley oil pump is doing the best it can or the aftermarket oil pump companies would pull their products off the market because of no sales.
 

Last edited by 1997bagger; Sep 25, 2010 at 12:19 PM.
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Old Sep 25, 2010 | 01:33 PM
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Honestly don't think I have an oil pressure issue, but thought it might help quiet down the lifters and would provide a visual readout of the oil pressure. I couldn't resist the lure of an easy and inexpensive mod and ordered the JP2 Monster Pack....
 
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Old Sep 25, 2010 | 04:23 PM
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Originally Posted by 1997bagger
Splash oiling system at idle in the crank area isn't a good oiling system, it lives with Briggs and Straton technology in stock form. Major mods, aggressive lobed cams that abuse lifters can benefit from a little more pressure, is this product helpful for someone who wants a little more oil pressure on a 102 degree day, it can help.

I'll bet S&S, Ultima don't operate at the edge of light flickering and factor in wear for oil pressure specificatons, Lost a lower bearing at 38,000 miles in a stock Evo and still have that sound burned in my memory and with all oil systems being controled by check valves (or they blow oil filters off) so I will have to disagree on the Harley oil pump is doing the best it can or the aftermarket oil pump companies would pull their products off the market because of no sales.
The lower end of an Evo engine is not lubed by splash oiling, the rod bearings are lubed by oil flowing through the passages in the crankpins to the bearings. The pinion bearing is lubed by oil flowing through passageways in the case to the pinion bearing outer race.

If you use one of these gizmos to increase oil pressure, you decrease the amount of oil going to the lower end at idle, because until the oil pressure relief valve lifts, all oil is sent to the lifters and top end. And this gizmo will make the oil pressure relief valve spring stay down until a higher pressure is reached.

I`m only referring to stock Harley oil pumps. I think TP has an oil pump that will not starve the bottom end at idle, seems like a good idea.

The oil pressure relief valve has nothing to do with the oil filter bypass valve, that valve is inside the oil filter.

I had a pinion bearing go out at about 60,000 miles, but it didn`t make a sound, discovered it when I split the cases for another problem. The outer race and inner race configuration was changed because of lube starvation to that bearing.
 

Last edited by Dan89FLSTC; Sep 25, 2010 at 04:38 PM.
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Old Sep 26, 2010 | 11:44 AM
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[QUOTE]
Originally Posted by Dan89FLSTC
The lower end of an Evo engine is not lubed by splash oiling, the rod bearings are lubed by oil flowing through the passages in the crankpins to the bearings. The pinion bearing is lubed by oil flowing through passageways in the case to the pinion bearing outer race.
At idle they take away from the crankpin oil and keeps it at the lifters

If you use one of these gizmos to increase oil pressure, you decrease the amount of oil going to the lower end at idle, because until the oil pressure relief valve lifts, all oil is sent to the lifters and top end. And this gizmo will make the oil pressure relief valve spring stay down until a higher pressure is reached.
HD wants the 1050 rpm idle to create more oil pressure, that pressure oils both rifles, kinda the opposite of this paragraph

I`m only referring to stock Harley oil pumps. I think TP has an oil pump that will not starve the bottom end at idle, seems like a good idea.
TP is a great design and cures the crankpin starvation as you mentioned or splash oiling as I called it.

The oil pressure relief valve has nothing to do with the oil filter bypass valve, that valve is inside the oil filter.
Oil pressure relief valve with too much of a spring pressure or debris can lift a oil filter off the base cold, I was using it as referance of a spring pressure adjusting device can control pressure.

Plow64, I was looking at your post as simple, inexpensive product as you and believe it can help with minor lifter clacking

Dan89, please only look at my posts as my views and not personally, not wanting to belittle a Evo member, just a discussion. I purchased the TP oil pump but open to any legit product that may help.
 
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Old Sep 26, 2010 | 12:43 PM
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Appreciate the discussion. Once I get it installed, I'll post the results back here. About the only comparisons I'll be able to make are the oil pressure at idle before and after installation, plus whether there's any change in the noise level. Don't have any other diagnostic tools at my disposal.
 
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