shri2222
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Posts posted by shri2222
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volume is the amount of space occupied by a given substance, pressure is the amount of force applied by a substance in a given space(volume), however pressure and volume do correlate, having volume does not give you indiscriminate pressure. Example a run flat(I'm using run flat since the side wall has no deflection when empty) tire at 35psi has a volume of 2cubic feet, a tire with 0psi still have a volume of 2 cubic feet. Both spaces are occupied by by air, but at different pressure because the KEY is density. Going back to oil, the weight of oils have different density, that causes direct effect on pressure inside the engine and oil passages. Just because air, or oil makes contact with a surface doesn't mean the do the same thing at varying pressures.
Also volume in a metallic solid is static, until pressure exceeds the tolerance of the solid and causes it to burst like a balloon, this is why oil is measured in pressure, if volume was measured the "space" occupied by oil would be a constant during engine operation.
Large oil pumps increase volume of oil flow, but that in turn with the internal friction and density of the oil causes compression of the oil in the motor, liquids do not like to be compressed so that will increase oil pressure.
Larger volume in between bearings and gallies will reduce oil pressure, thus reducing the oil's need to reduce pressure and to travel to other paths of least resistance. Oil is forced though bearing surfaces because the pressure of the oil is higher of that of the low/no pressure areas crankcase or valve train.
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i'm planing to run 5w50 Castrol Synthetic, I think its the best or both worlds, thin enough to circulate quickly when cold, and think enough to lubricate the larger bearing tolerances of a stock l28et
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possibly, the oil goes from the pickup, to the pump, then to the oil filter before going to the head, so if the filter is collapsed it might cause the lack of oil in the head.
I'ed also double check your sender, if you have a aftermarket gauge/sender setup they often use a diaphragm which if bad will read no pressure.
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possibly, the oil goes from the pickup, to the pump, then to the oil filter before going to the head, so if the filter is collapsed it might cause the lack of oil in the head.
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Dump your fram filter, they are known to fail.
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thats the difference in the NA vs turbo applications, coolant passages blocked. From the post above about the tomei, Is it designed for the turbo application or NA? I am running a l28ET bottom end with a mildly ported P90 head.
Wouldn't the blocked coolant passages on the l28et gasket cause the head temp to stay elevated increasing egt and be used more so to reduce emissions rather then gain performance? I've been wondering why nissan choose to block the steam holes, that's the only idea I could come up with, specifically since the p90 head was designed to flow through though ports.
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It depends on which tire you use. I have Hankook RS-3 in 225/50-16 on the XXR531 16x8 (same size rim I believe) and even with the fenders rolled the tires rub in the rear. I'll add that these are the widest 225 tires I've seen, but the point is you can't assume that all tires with the same size on the sidewall will have the same width.
I agree, I have heard people say they rub sometimes, the 527s are 8.25 wide, that tiny 1/4 inch on my Kumhos rolls the sidewall ever so slightly and make it clear on mine. I've had Hankooks on my last car, and they do have a thicker sidewall with rim protector bead, which could rub on a tight fit setup.
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No, That will look absolutely terrible, I have 527 16" with 225/50/16. If you put 195/45/15 on your car it is going to look like it has a lifted pickup with smaller tires then stock, which looks like A$s. Very poor fitment, and no you don't need to roll your fenders with these wheels.
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Can anyone please either link or post a oil feed/return and coolant feed/return labeling or diagram of a f54 and P90 head? Thanks ahead
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thats the difference in the NA vs turbo applications, coolant passages blocked. From the post above about the tomei, Is it designed for the turbo application or NA? I am running a l28ET bottom end with a mildly ported P90 head.
I actually just started a thread about it with the photo of the cometic showing which passage is blocked off, comparing it to other turbo gaskets and the msa non turbo mls gasket
http://forums.hybridz.org/index.php/topic/108621-head-gasket-question/
You can check out my comparison pic, and see for yourself, there is just one passage off for a p90 head, I haven't taken my motor apart yet so I can't tell if it's oil or coolant.
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Cometic is now making L28 head gaskets? Awesome! Last I spoke with them they we not planning on doing the tooling to produce these. Founds this:
You can probably have someone punch a hole there that has a punch press. If it is coolant, you are probably OK as it looks like there is another coolant hole just opposite the blocked one.
Yea, they make them now, I just got mine in yesterday from topend performance, They make them per order, the box it ships in has the cometic part number and the production date on the label. It looks great to, I ordered their 0.060 1.5mm only thing is that one passage.
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Same here. They suck at customer service though. When I ordered my HG, it was on backorder and they never let me know, I had to call them a week later wondering where my HG was.
Are you using the NA one? I got mine after a week. They shouldn't be a back-order they said to me they make them per order when I was dealing with them.
was one of your passages blocked off on your P90 if your running one?
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I ordered a Cometic Head gasket for a N/A looking at how all the passages matched the block, Now that I have received it, I noticed one port is block.
Will this be ok?, or am I in for trouble if I use it? And is that a oil passages or coolant? I also posted some comparison HGs
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http://www.racetep.com/Cometicimport.htm
I ordered my Cometic from them. They make custom thicknesses also. I myself have a 1.5mm head gasket
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XXR 527 16x8.25 0 offset 225/50/16
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I sell them at my job,Advance Auto parts $34.09
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Thanks for the response. You car looks great. I will be getting my car together with those rims in about a month and I will post a few pics. If you happen to take a few more pics please post. Thanks for the info.
Only new pic I have from the bodyshop, Straitening the front and rust repair.
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They fit fine, if your low though like dailydrifter on coilovers on 16"s you'll need to run his tire size. I am on springs and i have 225 50 16s, they poke a very little but that tire on a 16x8.25 is slightly stretched so it gives it good stance if your not very low.
I'ed post some pix, but the car is in the body shop, and my car looks identical to dailydrifter accept mine is yellow and on springs vs coilovers. I have some bad cell pix i'll try to post
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Or if anyone else has 16's 0 offset feel free to chime in. I am running a 2+2 so rear fender clearance isn't a issue as they are 2" wider in the a@@.
Thanks
They fit fine, if your low though like dailydrifter on coilovers on 16"s you'll need to run his tire size. I am on springs and i have 225 50 16s, they poke a very little but that tire on a 16x8.25 is slightly stretched so it gives it good stance if your not very low.
I'ed post some pix, but the car is in the body shop, and my car looks identical to dailydrifter accept mine is yellow and on springs vs coilovers. I have some bad cell pix i'll try to post
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I have ttt front and rear lcas to add track too
I'm gonna then assume you have coilovers?
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15x8.25 with 20mm spacers
Assume look perfect, hope you don't mind but what suspension are you running and tire size?
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double post
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ordered up a set of flat blacks and bashed them around at chuckwalla.
Are these 17x9.75 and 8.25?
if so what size spacers are you using?
L28ET - Suddenly 0 oil pressure (Not a faulty gauge!) *SOLVED*
in Nissan L6 Forum
Posted
useing a lower viscosity oil will and should not effect volume, that would still be constant. What would change is the force and speed the oil moves though the engine, a lower viscosity oil will travel faster due to its lower desity. A lower density oil will have lower oil pressure, that pressure in the same volume will be more subseptible to displacement. Pressureised oil prevents bearing surfances from comming into contact with eachother, pressurised oil vs low pressure oil, would occupy the same space, but as a boat floats on water in comparison to its desity and weight, pressurised oil keeps the bearing floating. Low oil pressure hence can cause bearing failure.