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Thread: M818 Turbo Addition

  1. #11
    Colonel US6x4's Avatar
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    Quote Originally Posted by Lonnie View Post
    Also ... Looking for an air inlet "mushroom cap", or whatever the technical name is. I currently have 2 different styles.
    One is flatter with a shield around the bottom & the other is more of a rounded dome. I would like to have a matching set. Anyone have a spare?
    This is the flatter style with the guard on the bottom and is the style I have on my twin cans.
    http://armysurpluswarehouse.com/2-1-...air-inlet-cap/

    20180928_133453.jpg
    Last edited by US6x4; 10-04-2019 at 12:10.

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    Lonnie (10-05-2019)

  3. #12
    Sergeant Major Lonnie's Avatar
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    Is that link also suitable for the 5 ton? It looks to be the same diameter.
    $12 for a new one is hard to pass up.

    If you look at my exhaust picture, I shoved a K&N style filter in the turbo for my preliminary start-up tests.
    It worked until & got the factory filter housing mounted.
    Last edited by Lonnie; 10-04-2019 at 23:16.
    1972 AM General, Turbocharged M818 w/ Deuce Bed & 16.00's

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    Sergeant Major Lonnie's Avatar
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    I spent the evening trying to replace the cold start pressure gauge.... They sure didn't make it easy to get this gauge out.

    Pulled the left side dash face loose & it allowed me to barely get a few fingers behind it to loosen up the clamp & fuel lines.
    FYI, all the warning placards, serial number plates etc. at the top of dash, also need the top row of bolts removed as they not only thread into the dash face, but also into the dash mounting bracket.

    I have a piece of Teflon lined, stainless braided hose rated for 2600 psi working pressure to connect it to the injector pump.
    1972 AM General, Turbocharged M818 w/ Deuce Bed & 16.00's

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    Colonel US6x4's Avatar
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    Quote Originally Posted by Lonnie View Post
    Is that link also suitable for the 5 ton? It looks to be the same diameter.
    $12 for a new one is hard to pass up.

    If you look at my exhaust picture, I shoved a K&N style filter in the turbo for my preliminary start-up tests.
    It worked until & got the factory filter housing mounted.
    I believe the item is mislabeled. I purchased this same part for my 5 ton air canister and it fits just like the original. Probably the same NSN.

  6. #15
    Sergeant Major Lonnie's Avatar
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    Thanks,
    For that price I got 2. Shipping was as much as the part. LOL.

    I spent 1/2 hr fixing the old one to make it look nice.
    1972 AM General, Turbocharged M818 w/ Deuce Bed & 16.00's

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    Sergeant Major Lonnie's Avatar
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    Did the dual fuel mod today.... a 2 hr job that took all day.

    Replaced the front line with a new one. Kinked the first line.
    Make a trip to the parts store for another line.

    Got the front on & went to put in the rear fitting... it hit the head & would not thread in all the way.
    2nd trip to the parts store. Got a 1/8NPTM x 1/4NPTF reducer & a 1/4NPTM to 3/8 tube 90.
    It cleared the head & I started installing. It broke off in the block 1/8 turn from its final position.
    Found the adapter hit the block, twisting it, causing it to break.

    Easy out would not grip in the fitting because I could not tap it in being 1/4" from the firewall.
    Had to drill a small hole in firewall to tap easy out in the fitting.... came right out then.

    3rd trip to parts store to get 1/8NPT close nipple & 1/8NPTF x 1/4NPTF reducer.

    5 hrs later I finally got a 2 hr project done.
    1972 AM General, Turbocharged M818 w/ Deuce Bed & 16.00's

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    silverstate55 (10-07-2019)

  9. #17
    4 Star General 74M35A2's Avatar
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    Thatís exactly how it goes for many that do that mod. A lot fight taking the plug out. No room, breaks, strips, etc...

    It is supposed to have a decent effect though. I want to see that truck pull a block wall over soon.
    CFO @ Portacharger

  10. #18
    Sergeant Major Lonnie's Avatar
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    Funny thing is the plug came out easily.... thought I had it under control. Then everything else went wrong.

    Got the fuel pressure gauge in. It shows a max of 210 psi just before it de-fuels at 2200.
    Unfortunately I wish it had more at lower rpm, but the 210 seems too high already.
    It is just below 200 psi at 2000 rpm.

    I have a #17 button in it & the the fuel screw is out 2-1/4 turns. The plug was out when I got it, so I have no idea where it was originally.

    Any ideas? EGT is still OK & fuel pressure could be higher down low, I'm just not sure how to get it there.
    Last edited by Lonnie; 10-06-2019 at 00:57.
    1972 AM General, Turbocharged M818 w/ Deuce Bed & 16.00's

  11. #19
    Sergeant Major Lonnie's Avatar
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    Had another learning experience today.

    The throttle seemed sluggish & also slow to return to idle.
    I could not see how a dual fuel line could cause this.

    I had suspected the fuel pressure gauge could have air in the line which allows compression/expansion when the fuel pressure changes.
    I noticed it also took longer to stop when you turned the key off... this confirmed my hunch.

    I loosened the line at the gauge until fuel squirted out, then tightened it up. Suddenly it was back to normal. The gauge also responded faster.
    1972 AM General, Turbocharged M818 w/ Deuce Bed & 16.00's

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  13. #20
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    Lonnie, do you have any pictures of the pressurized piping behind the engine or snaking up to the intake? Of all the turbo threads I've read the past few years you're the first one I've heard of to go this route.

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