@@CAT_Diesel , I created a low-profile valve cover out of a stock valve cover so I only had to trim the two stiffener ribs to clear the front valve cover and the road draft tube valve cover on the rear (didn't have to cut the main hood skin). FYI, the 25B jake head adds 2 5/16" in height. Here is a write up on it: www.steelsoldiers.com/threads/3-jake-heads-under-a-stock-m809-hood.195031/

@ awesome! Thanks I’ll check it out

@@bigastrofan1966 i drove one of those once before I got the M813. They look kinda funny but they're set up nice.

Sorry I thought this was before the turbo. Awesome truck

@@8.3leader15 , it starts exactly the same as it did w/o the turbo

@@jeremyturgeon4493 That's all listed in the description. Schwitzer/BorgWarner 167050 5" exhaust 25B jakes

The micro-switch is a Carling 110-SP. The rotary OFF-ON-ON switch is p/n 4776D from Erik's Military Surplus. The data plate i designed myself and had it custom made by a data plate shop. I might have an extra one on hand still...

My coworker said the Corps was still using them when he joined up in 2003 and didn't let go of them till about 2011. A 40 year service life speaks volumes about the trucks' build quality!

They really were incredible. Much better than the 923s, and those were pretty dang good aside from the CTIS which gave some trouble on occasion. Many a young Marine actually learned how to drive stick on the 813. It was that easy to operate. If you got a 5-ton stuck somewhere, you shouldn’t have been there in the first place!

Yep

14.5 psi is the most I've seen. No clue what chamber pressures are...

The two best noise makers! I have both on mine and they are my favorite additions 😊

Were you guys driving on a test track?

Ein Amerikaner Luftkraftwagen? Ich weiss nicht...

Du sollst dieser gutes Deutscher buch lesen! : www.tankograd.com/cms/website.php?id=/en/M809.htm

Yes, eventually I changed to a #17 button. The upgraded pulse manifolds with the long bolt spacers can be found at many big rig suppliers and even some ag parts suppliers. This one was from PAI Industries

They say about 72 mph

Sure does; all 3 jake heads are on there

@@m809er sounds like a dodge 12 valve Cummins engine 😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎😎

Everything on the exhaust side of the engine, the intake side of the engine, the coolant reservoir location, and lots of little stuff.

@@m809er ok, I'm guessing might be little easier for mine, because I have Cummins 250;in m925, I'm looking into putting turbo on it. Thanks

@@staym925 , on a 925 you have enough hood clearance to use a factory Cummins crossover pipe and aftercooler unless you want to use an MRAP intercooler or go non-intercooled like I did.

@@m809er that's what I was thinking, I wasn't plan on going with intercooler, but few have told me it would be a wise choice, I think I'll get parts on and see where stand, maybe put one on.

@@staym925 , check out this write-up on a 923 (not mine) www.steelsoldiers.com/threads/nhc-250-turbo-conversion-in-m923.90372/

The engine is governed at about 2150 rpm so the top speed is about 56 mph.

@@m809er Cool thanks

With 52" tires the top speed would be 70 mph, but that is beyond the tire's speed rating

2-5 are synchro'd...don't recall if 1st is or not

The rear flange is an integral part of the axle shaft (1-piece). When you pull it out it is attached to a shaft thats about 3 feet long with about a 2" diameter.

@@m809er perfect, thanks.

This is the small cam version (2" cam journal vs 2.5"). The Big Cam engines came in the M916/M920 family of trucks

@@m809er I may be getting a M813a1 here in the future and The first thing I wanna do is turbo it. I’ve read that the intake crossover doesn’t clear the hood,Did you custom make your intake pipe or just route it a different way? I see you have a second air filter housing on the passenger side. Also, did you source a different exhaust manifold? Looks to be a few out there that allow the turbo to bolt on.

@@USNENFTS The factory cross over doesn't clear so a custom cross over has to be fabbed up or cut through the hood like @bobbed_deuces_wild did to his M813. Go to steelsoldiers.com and search for thread 'My M813 gets a turbo' as well as other turbo build threads. Guys have been adding turbos for at least 10 years so lots of good info there.

@@m809er okay will do! Thanks man!

@m809er3 how much did it wake up the old girl? Any help with top speed?

1981

I like the increase - you don't feel it in the seat-of-your-pants, but I don't really slow down on the hills. It feels like going from a loaded truck to an empty truck. I added the turbo to make up for 1600r20s in the future.

They're Jacobs model 25B, but the hard to find 425A's would have also worked.

@@m809er I have a set of 30E’s

The 30E should work if your turbo has a single entry (without a center divider). Looks like they were used on Big Cam I engines...

@@m809er I have a pulse type manifold, and a low rise. I have 3 turbos, but doubt anyone is ideal for my 250.

@@jimferguson1048 I'm also running a pulse manifold and I'm using a single entry 26cm turbine housing.

Sweet! You would even have room for the factory Cummins aftercooler and crossover tube.

@@m809er I installed a MRAP radiator/intercooler already for the turbo swap.

It's a BorgWarner Schwitzer BHT3B (p/n 167050)

@@m809er what was your expected HP increase?

@@Superthermal I'm expecting it to be in the 290-315 range. Cummins made a turbo kit for the NHC-250 to reduce smoke and it added 40 hp and the dual fuel mod is said to add 10% more hp. So on a good day 250+40+25= 315. I'm not after big numbers since I don't have oil squirters for the pistons.

That's a trade secret...

Sorry for the late response, but when I removed the rocker boxes to add the jake brakes I found that the pirt were already plugged off so I was good to go.