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This is some amazing work you are doing! Mind if I ask what you do for a living? You seem to have a great deal of knowledge on all of this stuff you are doing.
2 different bases in Northern Iraq and once in Afghanistan. Sucked EVERY time.
EDIT: Not blaming you bro...it's just the system is not as effective as it's been hyped to be. Seen SEVERAL deaths where C-RAM was in place. I'm going to forever be a hater...but again, I would never blame the guy looking at the monitor.
Last edited by Pb82 Ronin; 03-14-2019 at 10:47 PM.
No offense taken brother...C-RAM for the most part is sense and warn and not counter measures. I was a site lead for 2 yrs in afghan and we had over 200 events during that timeframe with all being 107mm rockets from 5-6k out and only a handful of no warns....All injuries associated were wrong place wrong time deal. (8 events were mortars) It’s a pretty impressive system that has saved numerous lives at numerous sites. We did have 2LN KIAs who were unfortunately at POI and 1US urgent surgical that was unfortunate enough to be in his room during a event which is where Point of Impact was. We worked with him in the BDOC which sucked but he’s good now and lives a good life. Sorry for your losses man.
Last edited by Petraszewsky; 03-15-2019 at 10:21 AM.
That was the intercooler for the supercharger but I will be doing the radiator and oil coolers in the future as well
The boron nitride has a very high thermal conductivity which will allow more heat energy to be absorbed more readily. Like copper vs aluminum.....copper (400 W/m-K) does a better job of conducting thermal energy than aluminum (200 W/m-K) but that doesn’t mean you can’t improve the ability or capacity to conduct thermal energy which led to the boron nitride (hexagonal boron nitride hBN specifically) because of its superior thermal conductivity.....up to 400 W/m-K at room temperature. Anywho so the reason I coated the intercooler with hBN was to increase its thermal conductivity so that it may cool the air much lower and at a faster rate (time based) by absorbing more of that heat energy from the compressed air and more easily pass it into the coolant that fills the intercooler. I’m also coating the coils on my condensor for my house with it to lower my summer cooling bills. Thankfully boron nitride along with the tungsten and moly have come down in price over the years so we peasants may acquire it.
as i see it, whatever you put on there will decrese heat transfer, as long as its conductivity is not infinite. on top of that every interface of different materials is and additional barrier.
also dont forget there are several kinds of hbn and heat transfer behaviour is anisotropic. values as low as 37 w are reported. i have seen hbn being referred to as an isolator.
I haven’t gotten around to finishing up the engine built project yet. I moved about 2yrs ago and have been fixing the lemon of a house we bought. Anywho I’ll get back to engine build before long.
Working on a few things inside the replacement 6l80 for my Silverado.
Quick Polish with Super-Micro finish belt. Few more pieces to go then I’ll apply some tungsten disulfide on the polished areas. Also switching over from OE aluminum bushings to bronze bushings. After removing the OE aluminum bushings I lightly dress the area the bushing sits in with 60grit sandpaper to help give some bite to the new bushing and prevent spinning.
Polished stator areas where bushing and bearings ride
Polished input shaft where it rides on stator support bushing
Last edited by Petraszewsky; 12-10-2023 at 11:02 PM.
Bellhousing side of pump surface….notice the scuffing that’s already present and the machining marks. The machining marks act as “wipers” which literally squeegees the fluid film away resulting in metal to metal contact. You can catch a fingernail on some of the scuff marks. Will be polishing this area.
Last edited by Petraszewsky; 12-10-2023 at 11:01 PM.
plese tell how to apply ws2 to a polished surface.
I make a paste using the WS2 and rubbing alcohol then buff it on with a dedicated buffing wheel. Apply paste to part and buffing wheel….allow to dry then buff.
are you sure any of the stuff is actually applied? i tried this many times with several methods. no luck. only if surface is rough or if you manage to press the compound between the bearing surfaces. then it works great in reducing stick slip.
03-14-2019, 02:14 AM
